rtmp: Don't assume path points to a string of nonzero length
[ffmpeg.git] / avconv.c
1 /*
2  * avconv main
3  * Copyright (c) 2000-2011 The libav developers.
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "config.h"
23 #include <ctype.h>
24 #include <string.h>
25 #include <math.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <limits.h>
30 #include <unistd.h>
31 #include "libavformat/avformat.h"
32 #include "libavdevice/avdevice.h"
33 #include "libswscale/swscale.h"
34 #include "libavresample/avresample.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/audioconvert.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/samplefmt.h"
39 #include "libavutil/colorspace.h"
40 #include "libavutil/fifo.h"
41 #include "libavutil/intreadwrite.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/pixdesc.h"
45 #include "libavutil/avstring.h"
46 #include "libavutil/libm.h"
47 #include "libavutil/imgutils.h"
48 #include "libavformat/os_support.h"
49
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/avfiltergraph.h"
52 # include "libavfilter/buffersrc.h"
53 # include "libavfilter/buffersink.h"
54 # include "libavfilter/vsrc_buffer.h"
55
56 #if HAVE_SYS_RESOURCE_H
57 #include <sys/types.h>
58 #include <sys/time.h>
59 #include <sys/resource.h>
60 #elif HAVE_GETPROCESSTIMES
61 #include <windows.h>
62 #endif
63 #if HAVE_GETPROCESSMEMORYINFO
64 #include <windows.h>
65 #include <psapi.h>
66 #endif
67
68 #if HAVE_SYS_SELECT_H
69 #include <sys/select.h>
70 #endif
71
72 #include <time.h>
73
74 #include "cmdutils.h"
75
76 #include "libavutil/avassert.h"
77
78 #define VSYNC_AUTO       -1
79 #define VSYNC_PASSTHROUGH 0
80 #define VSYNC_CFR         1
81 #define VSYNC_VFR         2
82
83 const char program_name[] = "avconv";
84 const int program_birth_year = 2000;
85
86 /* select an input stream for an output stream */
87 typedef struct StreamMap {
88     int disabled;           /** 1 is this mapping is disabled by a negative map */
89     int file_index;
90     int stream_index;
91     int sync_file_index;
92     int sync_stream_index;
93     char *linklabel;       /** name of an output link, for mapping lavfi outputs */
94 } StreamMap;
95
96 /**
97  * select an input file for an output file
98  */
99 typedef struct MetadataMap {
100     int  file;      ///< file index
101     char type;      ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
102     int  index;     ///< stream/chapter/program number
103 } MetadataMap;
104
105 static const OptionDef options[];
106
107 static int video_discard = 0;
108 static int same_quant = 0;
109 static int do_deinterlace = 0;
110 static int intra_dc_precision = 8;
111 static int qp_hist = 0;
112
113 static int file_overwrite = 0;
114 static int do_benchmark = 0;
115 static int do_hex_dump = 0;
116 static int do_pkt_dump = 0;
117 static int do_pass = 0;
118 static char *pass_logfilename_prefix = NULL;
119 static int video_sync_method = VSYNC_AUTO;
120 static int audio_sync_method = 0;
121 static float audio_drift_threshold = 0.1;
122 static int copy_ts = 0;
123 static int copy_tb = 1;
124 static int opt_shortest = 0;
125 static char *vstats_filename;
126 static FILE *vstats_file;
127
128 static int audio_volume = 256;
129
130 static int exit_on_error = 0;
131 static int using_stdin = 0;
132 static int64_t video_size = 0;
133 static int64_t audio_size = 0;
134 static int64_t extra_size = 0;
135 static int nb_frames_dup = 0;
136 static int nb_frames_drop = 0;
137 static int input_sync;
138
139 static float dts_delta_threshold = 10;
140
141 static int print_stats = 1;
142
143 #define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
144
145 typedef struct InputFilter {
146     AVFilterContext    *filter;
147     struct InputStream *ist;
148     struct FilterGraph *graph;
149 } InputFilter;
150
151 typedef struct OutputFilter {
152     AVFilterContext     *filter;
153     struct OutputStream *ost;
154     struct FilterGraph  *graph;
155
156     /* temporary storage until stream maps are processed */
157     AVFilterInOut       *out_tmp;
158 } OutputFilter;
159
160 typedef struct FilterGraph {
161     int            index;
162     const char    *graph_desc;
163
164     AVFilterGraph *graph;
165
166     InputFilter   **inputs;
167     int          nb_inputs;
168     OutputFilter **outputs;
169     int         nb_outputs;
170 } FilterGraph;
171
172 typedef struct FrameBuffer {
173     uint8_t *base[4];
174     uint8_t *data[4];
175     int  linesize[4];
176
177     int h, w;
178     enum PixelFormat pix_fmt;
179
180     int refcount;
181     struct InputStream *ist;
182     struct FrameBuffer *next;
183 } FrameBuffer;
184
185 typedef struct InputStream {
186     int file_index;
187     AVStream *st;
188     int discard;             /* true if stream data should be discarded */
189     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
190     AVCodec *dec;
191     AVFrame *decoded_frame;
192
193     int64_t       start;     /* time when read started */
194     /* predicted dts of the next packet read for this stream or (when there are
195      * several frames in a packet) of the next frame in current packet */
196     int64_t       next_dts;
197     /* dts of the last packet read for this stream */
198     int64_t       last_dts;
199     PtsCorrectionContext pts_ctx;
200     double ts_scale;
201     int is_start;            /* is 1 at the start and after a discontinuity */
202     int showed_multi_packet_warning;
203     AVDictionary *opts;
204
205     int resample_height;
206     int resample_width;
207     int resample_pix_fmt;
208
209     int      resample_sample_fmt;
210     int      resample_sample_rate;
211     int      resample_channels;
212     uint64_t resample_channel_layout;
213
214     /* a pool of free buffers for decoded data */
215     FrameBuffer *buffer_pool;
216
217     /* decoded data from this stream goes into all those filters
218      * currently video only */
219     InputFilter **filters;
220     int        nb_filters;
221 } InputStream;
222
223 typedef struct InputFile {
224     AVFormatContext *ctx;
225     int eof_reached;      /* true if eof reached */
226     int ist_index;        /* index of first stream in ist_table */
227     int buffer_size;      /* current total buffer size */
228     int64_t ts_offset;
229     int nb_streams;       /* number of stream that avconv is aware of; may be different
230                              from ctx.nb_streams if new streams appear during av_read_frame() */
231     int rate_emu;
232 } InputFile;
233
234 typedef struct OutputStream {
235     int file_index;          /* file index */
236     int index;               /* stream index in the output file */
237     int source_index;        /* InputStream index */
238     AVStream *st;            /* stream in the output file */
239     int encoding_needed;     /* true if encoding needed for this stream */
240     int frame_number;
241     /* input pts and corresponding output pts
242        for A/V sync */
243     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
244     struct InputStream *sync_ist; /* input stream to sync against */
245     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
246     /* pts of the first frame encoded for this stream, used for limiting
247      * recording time */
248     int64_t first_pts;
249     AVBitStreamFilterContext *bitstream_filters;
250     AVCodec *enc;
251     int64_t max_frames;
252     AVFrame *filtered_frame;
253
254     /* video only */
255     AVRational frame_rate;
256     int force_fps;
257     int top_field_first;
258
259     float frame_aspect_ratio;
260     float last_quality;
261
262     /* forced key frames */
263     int64_t *forced_kf_pts;
264     int forced_kf_count;
265     int forced_kf_index;
266
267     FILE *logfile;
268
269     OutputFilter *filter;
270     char *avfilter;
271
272     int64_t sws_flags;
273     AVDictionary *opts;
274     int is_past_recording_time;
275     int stream_copy;
276     const char *attachment_filename;
277     int copy_initial_nonkeyframes;
278
279     enum PixelFormat pix_fmts[2];
280 } OutputStream;
281
282
283 typedef struct OutputFile {
284     AVFormatContext *ctx;
285     AVDictionary *opts;
286     int ost_index;       /* index of the first stream in output_streams */
287     int64_t recording_time; /* desired length of the resulting file in microseconds */
288     int64_t start_time;     /* start time in microseconds */
289     uint64_t limit_filesize;
290 } OutputFile;
291
292 static InputStream **input_streams = NULL;
293 static int        nb_input_streams = 0;
294 static InputFile   **input_files   = NULL;
295 static int        nb_input_files   = 0;
296
297 static OutputStream **output_streams = NULL;
298 static int         nb_output_streams = 0;
299 static OutputFile   **output_files   = NULL;
300 static int         nb_output_files   = 0;
301
302 static FilterGraph **filtergraphs;
303 int               nb_filtergraphs;
304
305 typedef struct OptionsContext {
306     /* input/output options */
307     int64_t start_time;
308     const char *format;
309
310     SpecifierOpt *codec_names;
311     int        nb_codec_names;
312     SpecifierOpt *audio_channels;
313     int        nb_audio_channels;
314     SpecifierOpt *audio_sample_rate;
315     int        nb_audio_sample_rate;
316     SpecifierOpt *frame_rates;
317     int        nb_frame_rates;
318     SpecifierOpt *frame_sizes;
319     int        nb_frame_sizes;
320     SpecifierOpt *frame_pix_fmts;
321     int        nb_frame_pix_fmts;
322
323     /* input options */
324     int64_t input_ts_offset;
325     int rate_emu;
326
327     SpecifierOpt *ts_scale;
328     int        nb_ts_scale;
329     SpecifierOpt *dump_attachment;
330     int        nb_dump_attachment;
331
332     /* output options */
333     StreamMap *stream_maps;
334     int     nb_stream_maps;
335     /* first item specifies output metadata, second is input */
336     MetadataMap (*meta_data_maps)[2];
337     int nb_meta_data_maps;
338     int metadata_global_manual;
339     int metadata_streams_manual;
340     int metadata_chapters_manual;
341     const char **attachments;
342     int       nb_attachments;
343
344     int chapters_input_file;
345
346     int64_t recording_time;
347     uint64_t limit_filesize;
348     float mux_preload;
349     float mux_max_delay;
350
351     int video_disable;
352     int audio_disable;
353     int subtitle_disable;
354     int data_disable;
355
356     /* indexed by output file stream index */
357     int   *streamid_map;
358     int nb_streamid_map;
359
360     SpecifierOpt *metadata;
361     int        nb_metadata;
362     SpecifierOpt *max_frames;
363     int        nb_max_frames;
364     SpecifierOpt *bitstream_filters;
365     int        nb_bitstream_filters;
366     SpecifierOpt *codec_tags;
367     int        nb_codec_tags;
368     SpecifierOpt *sample_fmts;
369     int        nb_sample_fmts;
370     SpecifierOpt *qscale;
371     int        nb_qscale;
372     SpecifierOpt *forced_key_frames;
373     int        nb_forced_key_frames;
374     SpecifierOpt *force_fps;
375     int        nb_force_fps;
376     SpecifierOpt *frame_aspect_ratios;
377     int        nb_frame_aspect_ratios;
378     SpecifierOpt *rc_overrides;
379     int        nb_rc_overrides;
380     SpecifierOpt *intra_matrices;
381     int        nb_intra_matrices;
382     SpecifierOpt *inter_matrices;
383     int        nb_inter_matrices;
384     SpecifierOpt *top_field_first;
385     int        nb_top_field_first;
386     SpecifierOpt *metadata_map;
387     int        nb_metadata_map;
388     SpecifierOpt *presets;
389     int        nb_presets;
390     SpecifierOpt *copy_initial_nonkeyframes;
391     int        nb_copy_initial_nonkeyframes;
392     SpecifierOpt *filters;
393     int        nb_filters;
394 } OptionsContext;
395
396 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
397 {\
398     int i, ret;\
399     for (i = 0; i < o->nb_ ## name; i++) {\
400         char *spec = o->name[i].specifier;\
401         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
402             outvar = o->name[i].u.type;\
403         else if (ret < 0)\
404             exit_program(1);\
405     }\
406 }
407
408 static void reset_options(OptionsContext *o)
409 {
410     const OptionDef *po = options;
411     int i;
412
413     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
414     while (po->name) {
415         void *dst = (uint8_t*)o + po->u.off;
416
417         if (po->flags & OPT_SPEC) {
418             SpecifierOpt **so = dst;
419             int i, *count = (int*)(so + 1);
420             for (i = 0; i < *count; i++) {
421                 av_freep(&(*so)[i].specifier);
422                 if (po->flags & OPT_STRING)
423                     av_freep(&(*so)[i].u.str);
424             }
425             av_freep(so);
426             *count = 0;
427         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
428             av_freep(dst);
429         po++;
430     }
431
432     for (i = 0; i < o->nb_stream_maps; i++)
433         av_freep(&o->stream_maps[i].linklabel);
434     av_freep(&o->stream_maps);
435     av_freep(&o->meta_data_maps);
436     av_freep(&o->streamid_map);
437
438     memset(o, 0, sizeof(*o));
439
440     o->mux_max_delay  = 0.7;
441     o->recording_time = INT64_MAX;
442     o->limit_filesize = UINT64_MAX;
443     o->chapters_input_file = INT_MAX;
444
445     uninit_opts();
446     init_opts();
447 }
448
449 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
450 {
451     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
452     int i, ret;
453     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
454     int h_chroma_shift, v_chroma_shift;
455     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
456     int w = s->width, h = s->height;
457
458     if (!buf)
459         return AVERROR(ENOMEM);
460
461     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
462         w += 2*edge;
463         h += 2*edge;
464     }
465
466     avcodec_align_dimensions(s, &w, &h);
467     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
468                               s->pix_fmt, 32)) < 0) {
469         av_freep(&buf);
470         return ret;
471     }
472     /* XXX this shouldn't be needed, but some tests break without this line
473      * those decoders are buggy and need to be fixed.
474      * the following tests fail:
475      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
476      */
477     memset(buf->base[0], 128, ret);
478
479     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
480     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
481         const int h_shift = i==0 ? 0 : h_chroma_shift;
482         const int v_shift = i==0 ? 0 : v_chroma_shift;
483         if (s->flags & CODEC_FLAG_EMU_EDGE)
484             buf->data[i] = buf->base[i];
485         else
486             buf->data[i] = buf->base[i] +
487                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
488                                    (pixel_size*edge >> h_shift), 32);
489     }
490     buf->w       = s->width;
491     buf->h       = s->height;
492     buf->pix_fmt = s->pix_fmt;
493     buf->ist     = ist;
494
495     *pbuf = buf;
496     return 0;
497 }
498
499 static void free_buffer_pool(InputStream *ist)
500 {
501     FrameBuffer *buf = ist->buffer_pool;
502     while (buf) {
503         ist->buffer_pool = buf->next;
504         av_freep(&buf->base[0]);
505         av_free(buf);
506         buf = ist->buffer_pool;
507     }
508 }
509
510 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
511 {
512     av_assert0(buf->refcount);
513     buf->refcount--;
514     if (!buf->refcount) {
515         buf->next = ist->buffer_pool;
516         ist->buffer_pool = buf;
517     }
518 }
519
520 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
521 {
522     InputStream *ist = s->opaque;
523     FrameBuffer *buf;
524     int ret, i;
525
526     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
527         return ret;
528
529     buf              = ist->buffer_pool;
530     ist->buffer_pool = buf->next;
531     buf->next        = NULL;
532     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
533         av_freep(&buf->base[0]);
534         av_free(buf);
535         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
536             return ret;
537     }
538     buf->refcount++;
539
540     frame->opaque        = buf;
541     frame->type          = FF_BUFFER_TYPE_USER;
542     frame->extended_data = frame->data;
543     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
544     frame->width         = buf->w;
545     frame->height        = buf->h;
546     frame->format        = buf->pix_fmt;
547     frame->sample_aspect_ratio = s->sample_aspect_ratio;
548
549     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
550         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
551         frame->data[i]     = buf->data[i];
552         frame->linesize[i] = buf->linesize[i];
553     }
554
555     return 0;
556 }
557
558 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
559 {
560     InputStream *ist = s->opaque;
561     FrameBuffer *buf = frame->opaque;
562     int i;
563
564     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
565         frame->data[i] = NULL;
566
567     unref_buffer(ist, buf);
568 }
569
570 static void filter_release_buffer(AVFilterBuffer *fb)
571 {
572     FrameBuffer *buf = fb->priv;
573     av_free(fb);
574     unref_buffer(buf->ist, buf);
575 }
576
577 /**
578  * Define a function for building a string containing a list of
579  * allowed formats,
580  */
581 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
582 static char *choose_ ## var ## s(OutputStream *ost)                             \
583 {                                                                               \
584     if (ost->st->codec->var != none) {                                          \
585         get_name(ost->st->codec->var);                                          \
586         return av_strdup(name);                                                 \
587     } else if (ost->enc->supported_list) {                                      \
588         const type *p;                                                          \
589         AVIOContext *s = NULL;                                                  \
590         uint8_t *ret;                                                           \
591         int len;                                                                \
592                                                                                 \
593         if (avio_open_dyn_buf(&s) < 0)                                          \
594             exit_program(1);                                                    \
595                                                                                 \
596         for (p = ost->enc->supported_list; *p != none; p++) {                   \
597             get_name(*p);                                                       \
598             avio_printf(s, "%s" separator, name);                               \
599         }                                                                       \
600         len = avio_close_dyn_buf(s, &ret);                                      \
601         ret[len - 1] = 0;                                                       \
602         return ret;                                                             \
603     } else                                                                      \
604         return NULL;                                                            \
605 }
606
607 #define GET_PIX_FMT_NAME(pix_fmt)\
608     const char *name = av_get_pix_fmt_name(pix_fmt);
609
610 DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
611                   GET_PIX_FMT_NAME, ":")
612
613 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
614     const char *name = av_get_sample_fmt_name(sample_fmt)
615
616 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
617                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
618
619 #define GET_SAMPLE_RATE_NAME(rate)\
620     char name[16];\
621     snprintf(name, sizeof(name), "%d", rate);
622
623 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
624                   GET_SAMPLE_RATE_NAME, ",")
625
626 #define GET_CH_LAYOUT_NAME(ch_layout)\
627     char name[16];\
628     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
629
630 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
631                   GET_CH_LAYOUT_NAME, ",")
632
633 static int configure_audio_filters(FilterGraph *fg, AVFilterContext **in_filter,
634                                    AVFilterContext **out_filter)
635 {
636     InputStream  *ist = fg->inputs[0]->ist;
637     OutputStream *ost = fg->outputs[0]->ost;
638     AVCodecContext *codec  = ost->st->codec;
639     AVCodecContext *icodec = ist->st->codec;
640     char *sample_fmts, *sample_rates, *channel_layouts;
641     char args[256];
642     int ret;
643
644     avfilter_graph_free(&fg->graph);
645     if (!(fg->graph = avfilter_graph_alloc()))
646         return AVERROR(ENOMEM);
647
648     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:"
649              "channel_layout=0x%"PRIx64, ist->st->time_base.num,
650              ist->st->time_base.den, icodec->sample_rate,
651              av_get_sample_fmt_name(icodec->sample_fmt), icodec->channel_layout);
652     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
653                                        avfilter_get_by_name("abuffer"),
654                                        "src", args, NULL, fg->graph);
655     if (ret < 0)
656         return ret;
657
658     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
659                                        avfilter_get_by_name("abuffersink"),
660                                        "out", NULL, NULL, fg->graph);
661     if (ret < 0)
662         return ret;
663
664     *in_filter  = fg->inputs[0]->filter;
665     *out_filter = fg->outputs[0]->filter;
666
667     if (codec->channels && !codec->channel_layout)
668         codec->channel_layout = av_get_default_channel_layout(codec->channels);
669
670     sample_fmts     = choose_sample_fmts(ost);
671     sample_rates    = choose_sample_rates(ost);
672     channel_layouts = choose_channel_layouts(ost);
673     if (sample_fmts || sample_rates || channel_layouts) {
674         AVFilterContext *format;
675         char args[256];
676         int len = 0;
677
678         if (sample_fmts)
679             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
680                             sample_fmts);
681         if (sample_rates)
682             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
683                             sample_rates);
684         if (channel_layouts)
685             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
686                             channel_layouts);
687         args[len - 1] = 0;
688
689         av_freep(&sample_fmts);
690         av_freep(&sample_rates);
691         av_freep(&channel_layouts);
692
693         ret = avfilter_graph_create_filter(&format,
694                                            avfilter_get_by_name("aformat"),
695                                            "aformat", args, NULL, fg->graph);
696         if (ret < 0)
697             return ret;
698
699         ret = avfilter_link(format, 0, fg->outputs[0]->filter, 0);
700         if (ret < 0)
701             return ret;
702
703         *out_filter = format;
704     }
705
706     if (audio_sync_method > 0) {
707         AVFilterContext *async;
708         char args[256];
709         int  len = 0;
710
711         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
712                "asyncts audio filter instead.\n");
713
714         if (audio_sync_method > 1)
715             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
716                             "max_comp=%d:", audio_sync_method);
717         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
718                  audio_drift_threshold);
719
720         ret = avfilter_graph_create_filter(&async,
721                                            avfilter_get_by_name("asyncts"),
722                                            "async", args, NULL, fg->graph);
723         if (ret < 0)
724             return ret;
725
726         ret = avfilter_link(*in_filter, 0, async, 0);
727         if (ret < 0)
728             return ret;
729
730         *in_filter = async;
731     }
732
733     return 0;
734 }
735
736 static int configure_video_filters(FilterGraph *fg, AVFilterContext **in_filter,
737                                    AVFilterContext **out_filter)
738 {
739     InputStream  *ist = fg->inputs[0]->ist;
740     OutputStream *ost = fg->outputs[0]->ost;
741     AVFilterContext *filter;
742     AVCodecContext *codec = ost->st->codec;
743     char *pix_fmts;
744     AVRational sample_aspect_ratio;
745     char args[255];
746     int ret;
747
748     if (ist->st->sample_aspect_ratio.num) {
749         sample_aspect_ratio = ist->st->sample_aspect_ratio;
750     } else
751         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
752
753     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
754              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
755              sample_aspect_ratio.num, sample_aspect_ratio.den);
756
757     ret = avfilter_graph_create_filter(&fg->inputs[0]->filter,
758                                        avfilter_get_by_name("buffer"),
759                                        "src", args, NULL, fg->graph);
760     if (ret < 0)
761         return ret;
762     ret = avfilter_graph_create_filter(&fg->outputs[0]->filter,
763                                        avfilter_get_by_name("buffersink"),
764                                        "out", NULL, NULL, fg->graph);
765     if (ret < 0)
766         return ret;
767     *in_filter  = fg->inputs[0]->filter;
768     *out_filter = fg->outputs[0]->filter;
769
770     if (codec->width || codec->height) {
771         snprintf(args, 255, "%d:%d:flags=0x%X",
772                  codec->width,
773                  codec->height,
774                  (unsigned)ost->sws_flags);
775         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
776                                                 NULL, args, NULL, fg->graph)) < 0)
777             return ret;
778         if ((ret = avfilter_link(*in_filter, 0, filter, 0)) < 0)
779             return ret;
780         *in_filter = filter;
781     }
782
783     if ((pix_fmts = choose_pix_fmts(ost))) {
784         if ((ret = avfilter_graph_create_filter(&filter,
785                                                 avfilter_get_by_name("format"),
786                                                 "format", pix_fmts, NULL,
787                                                 fg->graph)) < 0)
788             return ret;
789         if ((ret = avfilter_link(filter, 0, *out_filter, 0)) < 0)
790             return ret;
791
792         *out_filter = filter;
793         av_freep(&pix_fmts);
794     }
795
796     snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
797     fg->graph->scale_sws_opts = av_strdup(args);
798
799     return 0;
800 }
801
802 static int configure_simple_filtergraph(FilterGraph *fg)
803 {
804     OutputStream *ost = fg->outputs[0]->ost;
805     AVFilterContext *in_filter, *out_filter;
806     int ret;
807
808     avfilter_graph_free(&fg->graph);
809     fg->graph = avfilter_graph_alloc();
810
811     switch (ost->st->codec->codec_type) {
812     case AVMEDIA_TYPE_VIDEO:
813         ret = configure_video_filters(fg, &in_filter, &out_filter);
814         break;
815     case AVMEDIA_TYPE_AUDIO:
816         ret = configure_audio_filters(fg, &in_filter, &out_filter);
817         break;
818     default: av_assert0(0);
819     }
820     if (ret < 0)
821         return ret;
822
823     if (ost->avfilter) {
824         AVFilterInOut *outputs = avfilter_inout_alloc();
825         AVFilterInOut *inputs  = avfilter_inout_alloc();
826
827         outputs->name    = av_strdup("in");
828         outputs->filter_ctx = in_filter;
829         outputs->pad_idx = 0;
830         outputs->next    = NULL;
831
832         inputs->name    = av_strdup("out");
833         inputs->filter_ctx = out_filter;
834         inputs->pad_idx = 0;
835         inputs->next    = NULL;
836
837         if ((ret = avfilter_graph_parse(fg->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
838             return ret;
839     } else {
840         if ((ret = avfilter_link(in_filter, 0, out_filter, 0)) < 0)
841             return ret;
842     }
843
844     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
845         return ret;
846
847     ost->filter = fg->outputs[0];
848
849     return 0;
850 }
851
852 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
853 {
854     FilterGraph *fg = av_mallocz(sizeof(*fg));
855
856     if (!fg)
857         exit_program(1);
858     fg->index = nb_filtergraphs;
859
860     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
861                              fg->nb_outputs + 1);
862     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
863         exit_program(1);
864     fg->outputs[0]->ost   = ost;
865     fg->outputs[0]->graph = fg;
866
867     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
868                             fg->nb_inputs + 1);
869     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
870         exit_program(1);
871     fg->inputs[0]->ist   = ist;
872     fg->inputs[0]->graph = fg;
873
874     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
875                               &ist->nb_filters, ist->nb_filters + 1);
876     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
877
878     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
879                               &nb_filtergraphs, nb_filtergraphs + 1);
880     filtergraphs[nb_filtergraphs - 1] = fg;
881
882     return fg;
883 }
884
885 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
886 {
887     InputStream *ist;
888     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
889     int i;
890
891     // TODO: support other filter types
892     if (type != AVMEDIA_TYPE_VIDEO) {
893         av_log(NULL, AV_LOG_FATAL, "Only video filters supported currently.\n");
894         exit_program(1);
895     }
896
897     if (in->name) {
898         AVFormatContext *s;
899         AVStream       *st = NULL;
900         char *p;
901         int file_idx = strtol(in->name, &p, 0);
902
903         if (file_idx < 0 || file_idx >= nb_input_files) {
904             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
905                    file_idx, fg->graph_desc);
906             exit_program(1);
907         }
908         s = input_files[file_idx]->ctx;
909
910         for (i = 0; i < s->nb_streams; i++) {
911             if (s->streams[i]->codec->codec_type != type)
912                 continue;
913             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
914                 st = s->streams[i];
915                 break;
916             }
917         }
918         if (!st) {
919             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
920                    "matches no streams.\n", p, fg->graph_desc);
921             exit_program(1);
922         }
923         ist = input_streams[input_files[file_idx]->ist_index + st->index];
924     } else {
925         /* find the first unused stream of corresponding type */
926         for (i = 0; i < nb_input_streams; i++) {
927             ist = input_streams[i];
928             if (ist->st->codec->codec_type == type && ist->discard)
929                 break;
930         }
931         if (i == nb_input_streams) {
932             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
933                    "unlabeled input pad %d on filter %s", in->pad_idx,
934                    in->filter_ctx->name);
935             exit_program(1);
936         }
937     }
938     ist->discard         = 0;
939     ist->decoding_needed = 1;
940     ist->st->discard = AVDISCARD_NONE;
941
942     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
943                             &fg->nb_inputs, fg->nb_inputs + 1);
944     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
945         exit_program(1);
946     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
947     fg->inputs[fg->nb_inputs - 1]->graph = fg;
948
949     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
950                               &ist->nb_filters, ist->nb_filters + 1);
951     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
952 }
953
954 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
955 {
956     char *pix_fmts;
957     AVCodecContext *codec = ofilter->ost->st->codec;
958     AVFilterContext *last_filter = out->filter_ctx;
959     int pad_idx = out->pad_idx;
960     int ret;
961
962
963     ret = avfilter_graph_create_filter(&ofilter->filter,
964                                        avfilter_get_by_name("buffersink"),
965                                        "out", NULL, pix_fmts, fg->graph);
966     if (ret < 0)
967         return ret;
968
969     if (codec->width || codec->height) {
970         char args[255];
971         AVFilterContext *filter;
972
973         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
974                  codec->width,
975                  codec->height,
976                  (unsigned)ofilter->ost->sws_flags);
977         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
978                                                 NULL, args, NULL, fg->graph)) < 0)
979             return ret;
980         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
981             return ret;
982
983         last_filter = filter;
984         pad_idx = 0;
985     }
986
987     if ((pix_fmts = choose_pix_fmts(ofilter->ost))) {
988         AVFilterContext *filter;
989         if ((ret = avfilter_graph_create_filter(&filter,
990                                                 avfilter_get_by_name("format"),
991                                                 "format", pix_fmts, NULL,
992                                                 fg->graph)) < 0)
993             return ret;
994         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
995             return ret;
996
997         last_filter = filter;
998         pad_idx     = 0;
999         av_freep(&pix_fmts);
1000     }
1001
1002     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
1003         return ret;
1004
1005     return 0;
1006 }
1007
1008 static int configure_complex_filter(FilterGraph *fg)
1009 {
1010     AVFilterInOut *inputs, *outputs, *cur;
1011     int ret, i, init = !fg->graph;
1012
1013     avfilter_graph_free(&fg->graph);
1014     if (!(fg->graph = avfilter_graph_alloc()))
1015         return AVERROR(ENOMEM);
1016
1017     if ((ret = avfilter_graph_parse2(fg->graph, fg->graph_desc, &inputs, &outputs)) < 0)
1018         return ret;
1019
1020     for (cur = inputs; init && cur; cur = cur->next)
1021         init_input_filter(fg, cur);
1022
1023     for (cur = inputs, i = 0; cur; cur = cur->next, i++) {
1024         InputFilter *ifilter = fg->inputs[i];
1025         InputStream     *ist = ifilter->ist;
1026         AVRational       sar;
1027         char            args[255];
1028
1029         sar = ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
1030                                                  ist->st->codec->sample_aspect_ratio;
1031         snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
1032                  ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
1033                  sar.num, sar.den);
1034
1035         if ((ret = avfilter_graph_create_filter(&ifilter->filter,
1036                                                 avfilter_get_by_name("buffer"), cur->name,
1037                                                 args, NULL, fg->graph)) < 0)
1038             return ret;
1039         if ((ret = avfilter_link(ifilter->filter, 0,
1040                                  cur->filter_ctx, cur->pad_idx)) < 0)
1041             return ret;
1042     }
1043     avfilter_inout_free(&inputs);
1044
1045     if (!init) {
1046         /* we already know the mappings between lavfi outputs and output streams,
1047          * so we can finish the setup */
1048         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1049             configure_output_filter(fg, fg->outputs[i], cur);
1050         avfilter_inout_free(&outputs);
1051
1052         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1053             return ret;
1054     } else {
1055         /* wait until output mappings are processed */
1056         for (cur = outputs; cur;) {
1057             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1058                                      &fg->nb_outputs, fg->nb_outputs + 1);
1059             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1060                 exit_program(1);
1061             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1062             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1063             cur = cur->next;
1064             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1065         }
1066     }
1067
1068     return 0;
1069 }
1070
1071 static int configure_complex_filters(void)
1072 {
1073     int i, ret = 0;
1074
1075     for (i = 0; i < nb_filtergraphs; i++)
1076         if (!filtergraphs[i]->graph &&
1077             (ret = configure_complex_filter(filtergraphs[i])) < 0)
1078             return ret;
1079     return 0;
1080 }
1081
1082 static int configure_filtergraph(FilterGraph *fg)
1083 {
1084     return fg->graph_desc ? configure_complex_filter(fg) :
1085                             configure_simple_filtergraph(fg);
1086 }
1087
1088 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1089 {
1090     int i;
1091     for (i = 0; i < fg->nb_inputs; i++)
1092         if (fg->inputs[i]->ist == ist)
1093             return 1;
1094     return 0;
1095 }
1096
1097 static void term_exit(void)
1098 {
1099     av_log(NULL, AV_LOG_QUIET, "");
1100 }
1101
1102 static volatile int received_sigterm = 0;
1103 static volatile int received_nb_signals = 0;
1104
1105 static void
1106 sigterm_handler(int sig)
1107 {
1108     received_sigterm = sig;
1109     received_nb_signals++;
1110     term_exit();
1111 }
1112
1113 static void term_init(void)
1114 {
1115     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1116     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1117 #ifdef SIGXCPU
1118     signal(SIGXCPU, sigterm_handler);
1119 #endif
1120 }
1121
1122 static int decode_interrupt_cb(void *ctx)
1123 {
1124     return received_nb_signals > 1;
1125 }
1126
1127 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1128
1129 void exit_program(int ret)
1130 {
1131     int i, j;
1132
1133     for (i = 0; i < nb_filtergraphs; i++) {
1134         avfilter_graph_free(&filtergraphs[i]->graph);
1135         for (j = 0; j < filtergraphs[i]->nb_inputs; j++)
1136             av_freep(&filtergraphs[i]->inputs[j]);
1137         av_freep(&filtergraphs[i]->inputs);
1138         for (j = 0; j < filtergraphs[i]->nb_outputs; j++)
1139             av_freep(&filtergraphs[i]->outputs[j]);
1140         av_freep(&filtergraphs[i]->outputs);
1141         av_freep(&filtergraphs[i]);
1142     }
1143     av_freep(&filtergraphs);
1144
1145     /* close files */
1146     for (i = 0; i < nb_output_files; i++) {
1147         AVFormatContext *s = output_files[i]->ctx;
1148         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1149             avio_close(s->pb);
1150         avformat_free_context(s);
1151         av_dict_free(&output_files[i]->opts);
1152         av_freep(&output_files[i]);
1153     }
1154     for (i = 0; i < nb_output_streams; i++) {
1155         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1156         while (bsfc) {
1157             AVBitStreamFilterContext *next = bsfc->next;
1158             av_bitstream_filter_close(bsfc);
1159             bsfc = next;
1160         }
1161         output_streams[i]->bitstream_filters = NULL;
1162
1163         av_freep(&output_streams[i]->avfilter);
1164         av_freep(&output_streams[i]->filtered_frame);
1165         av_freep(&output_streams[i]);
1166     }
1167     for (i = 0; i < nb_input_files; i++) {
1168         avformat_close_input(&input_files[i]->ctx);
1169         av_freep(&input_files[i]);
1170     }
1171     for (i = 0; i < nb_input_streams; i++) {
1172         av_freep(&input_streams[i]->decoded_frame);
1173         av_dict_free(&input_streams[i]->opts);
1174         free_buffer_pool(input_streams[i]);
1175         av_freep(&input_streams[i]->filters);
1176         av_freep(&input_streams[i]);
1177     }
1178
1179     if (vstats_file)
1180         fclose(vstats_file);
1181     av_free(vstats_filename);
1182
1183     av_freep(&input_streams);
1184     av_freep(&input_files);
1185     av_freep(&output_streams);
1186     av_freep(&output_files);
1187
1188     uninit_opts();
1189
1190     avfilter_uninit();
1191     avformat_network_deinit();
1192
1193     if (received_sigterm) {
1194         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1195                (int) received_sigterm);
1196         exit (255);
1197     }
1198
1199     exit(ret);
1200 }
1201
1202 static void assert_avoptions(AVDictionary *m)
1203 {
1204     AVDictionaryEntry *t;
1205     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1206         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1207         exit_program(1);
1208     }
1209 }
1210
1211 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1212 {
1213     const char *codec_string = encoder ? "encoder" : "decoder";
1214     AVCodec *codec;
1215     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1216         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1217         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1218                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1219                 codec_string, c->codec->name);
1220         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1221         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1222             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1223                    codec_string, codec->name);
1224         exit_program(1);
1225     }
1226 }
1227
1228 /**
1229  * Update the requested input sample format based on the output sample format.
1230  * This is currently only used to request float output from decoders which
1231  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1232  * Ideally this will be removed in the future when decoders do not do format
1233  * conversion and only output in their native format.
1234  */
1235 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1236                               AVCodecContext *enc)
1237 {
1238     /* if sample formats match or a decoder sample format has already been
1239        requested, just return */
1240     if (enc->sample_fmt == dec->sample_fmt ||
1241         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1242         return;
1243
1244     /* if decoder supports more than one output format */
1245     if (dec_codec && dec_codec->sample_fmts &&
1246         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1247         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1248         const enum AVSampleFormat *p;
1249         int min_dec = -1, min_inc = -1;
1250
1251         /* find a matching sample format in the encoder */
1252         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1253             if (*p == enc->sample_fmt) {
1254                 dec->request_sample_fmt = *p;
1255                 return;
1256             } else if (*p > enc->sample_fmt) {
1257                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1258             } else
1259                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1260         }
1261
1262         /* if none match, provide the one that matches quality closest */
1263         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1264                                   enc->sample_fmt - min_dec;
1265     }
1266 }
1267
1268 static double
1269 get_sync_ipts(const OutputStream *ost, int64_t pts)
1270 {
1271     OutputFile *of = output_files[ost->file_index];
1272     return (double)(pts - of->start_time) / AV_TIME_BASE;
1273 }
1274
1275 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1276 {
1277     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1278     AVCodecContext          *avctx = ost->st->codec;
1279     int ret;
1280
1281     /*
1282      * Audio encoders may split the packets --  #frames in != #packets out.
1283      * But there is no reordering, so we can limit the number of output packets
1284      * by simply dropping them here.
1285      * Counting encoded video frames needs to be done separately because of
1286      * reordering, see do_video_out()
1287      */
1288     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1289         if (ost->frame_number >= ost->max_frames) {
1290             av_free_packet(pkt);
1291             return;
1292         }
1293         ost->frame_number++;
1294     }
1295
1296     while (bsfc) {
1297         AVPacket new_pkt = *pkt;
1298         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1299                                            &new_pkt.data, &new_pkt.size,
1300                                            pkt->data, pkt->size,
1301                                            pkt->flags & AV_PKT_FLAG_KEY);
1302         if (a > 0) {
1303             av_free_packet(pkt);
1304             new_pkt.destruct = av_destruct_packet;
1305         } else if (a < 0) {
1306             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1307                    bsfc->filter->name, pkt->stream_index,
1308                    avctx->codec ? avctx->codec->name : "copy");
1309             print_error("", a);
1310             if (exit_on_error)
1311                 exit_program(1);
1312         }
1313         *pkt = new_pkt;
1314
1315         bsfc = bsfc->next;
1316     }
1317
1318     pkt->stream_index = ost->index;
1319     ret = av_interleaved_write_frame(s, pkt);
1320     if (ret < 0) {
1321         print_error("av_interleaved_write_frame()", ret);
1322         exit_program(1);
1323     }
1324 }
1325
1326 static int check_recording_time(OutputStream *ost)
1327 {
1328     OutputFile *of = output_files[ost->file_index];
1329
1330     if (of->recording_time != INT64_MAX &&
1331         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1332                       AV_TIME_BASE_Q) >= 0) {
1333         ost->is_past_recording_time = 1;
1334         return 0;
1335     }
1336     return 1;
1337 }
1338
1339 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1340                          AVFrame *frame)
1341 {
1342     AVCodecContext *enc = ost->st->codec;
1343     AVPacket pkt;
1344     int got_packet = 0;
1345
1346     av_init_packet(&pkt);
1347     pkt.data = NULL;
1348     pkt.size = 0;
1349
1350     if (!check_recording_time(ost))
1351         return;
1352
1353     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1354         frame->pts = ost->sync_opts;
1355     ost->sync_opts = frame->pts + frame->nb_samples;
1356
1357     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1358         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1359         exit_program(1);
1360     }
1361
1362     if (got_packet) {
1363         if (pkt.pts != AV_NOPTS_VALUE)
1364             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1365         if (pkt.dts != AV_NOPTS_VALUE)
1366             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1367         if (pkt.duration > 0)
1368             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1369
1370         write_frame(s, &pkt, ost);
1371
1372         audio_size += pkt.size;
1373     }
1374 }
1375
1376 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1377 {
1378     AVCodecContext *dec;
1379     AVPicture *picture2;
1380     AVPicture picture_tmp;
1381     uint8_t *buf = 0;
1382
1383     dec = ist->st->codec;
1384
1385     /* deinterlace : must be done before any resize */
1386     if (do_deinterlace) {
1387         int size;
1388
1389         /* create temporary picture */
1390         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1391         buf  = av_malloc(size);
1392         if (!buf)
1393             return;
1394
1395         picture2 = &picture_tmp;
1396         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1397
1398         if (avpicture_deinterlace(picture2, picture,
1399                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1400             /* if error, do not deinterlace */
1401             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1402             av_free(buf);
1403             buf = NULL;
1404             picture2 = picture;
1405         }
1406     } else {
1407         picture2 = picture;
1408     }
1409
1410     if (picture != picture2)
1411         *picture = *picture2;
1412     *bufp = buf;
1413 }
1414
1415 static void do_subtitle_out(AVFormatContext *s,
1416                             OutputStream *ost,
1417                             InputStream *ist,
1418                             AVSubtitle *sub,
1419                             int64_t pts)
1420 {
1421     static uint8_t *subtitle_out = NULL;
1422     int subtitle_out_max_size = 1024 * 1024;
1423     int subtitle_out_size, nb, i;
1424     AVCodecContext *enc;
1425     AVPacket pkt;
1426
1427     if (pts == AV_NOPTS_VALUE) {
1428         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1429         if (exit_on_error)
1430             exit_program(1);
1431         return;
1432     }
1433
1434     enc = ost->st->codec;
1435
1436     if (!subtitle_out) {
1437         subtitle_out = av_malloc(subtitle_out_max_size);
1438     }
1439
1440     /* Note: DVB subtitle need one packet to draw them and one other
1441        packet to clear them */
1442     /* XXX: signal it in the codec context ? */
1443     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1444         nb = 2;
1445     else
1446         nb = 1;
1447
1448     for (i = 0; i < nb; i++) {
1449         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1450         if (!check_recording_time(ost))
1451             return;
1452
1453         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1454         // start_display_time is required to be 0
1455         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1456         sub->end_display_time  -= sub->start_display_time;
1457         sub->start_display_time = 0;
1458         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1459                                                     subtitle_out_max_size, sub);
1460         if (subtitle_out_size < 0) {
1461             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1462             exit_program(1);
1463         }
1464
1465         av_init_packet(&pkt);
1466         pkt.data = subtitle_out;
1467         pkt.size = subtitle_out_size;
1468         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1469         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1470             /* XXX: the pts correction is handled here. Maybe handling
1471                it in the codec would be better */
1472             if (i == 0)
1473                 pkt.pts += 90 * sub->start_display_time;
1474             else
1475                 pkt.pts += 90 * sub->end_display_time;
1476         }
1477         write_frame(s, &pkt, ost);
1478     }
1479 }
1480
1481 static void do_video_out(AVFormatContext *s,
1482                          OutputStream *ost,
1483                          AVFrame *in_picture,
1484                          int *frame_size, float quality)
1485 {
1486     int nb_frames, i, ret, format_video_sync;
1487     AVCodecContext *enc;
1488     double sync_ipts, delta;
1489
1490     enc = ost->st->codec;
1491
1492     sync_ipts = get_sync_ipts(ost, in_picture->pts) / av_q2d(enc->time_base);
1493     delta = sync_ipts - ost->sync_opts;
1494
1495     /* by default, we output a single frame */
1496     nb_frames = 1;
1497
1498     *frame_size = 0;
1499
1500     format_video_sync = video_sync_method;
1501     if (format_video_sync == VSYNC_AUTO)
1502         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1503                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1504
1505     switch (format_video_sync) {
1506     case VSYNC_CFR:
1507         // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
1508         if (delta < -1.1)
1509             nb_frames = 0;
1510         else if (delta > 1.1)
1511             nb_frames = lrintf(delta);
1512         break;
1513     case VSYNC_VFR:
1514         if (delta <= -0.6)
1515             nb_frames = 0;
1516         else if (delta > 0.6)
1517             ost->sync_opts = lrint(sync_ipts);
1518         break;
1519     case VSYNC_PASSTHROUGH:
1520         ost->sync_opts = lrint(sync_ipts);
1521         break;
1522     default:
1523         av_assert0(0);
1524     }
1525
1526     nb_frames = FFMIN(nb_frames, ost->max_frames - ost->frame_number);
1527     if (nb_frames == 0) {
1528         nb_frames_drop++;
1529         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1530         return;
1531     } else if (nb_frames > 1) {
1532         nb_frames_dup += nb_frames - 1;
1533         av_log(NULL, AV_LOG_VERBOSE, "*** %d dup!\n", nb_frames - 1);
1534     }
1535
1536     if (!ost->frame_number)
1537         ost->first_pts = ost->sync_opts;
1538
1539     /* duplicates frame if needed */
1540     for (i = 0; i < nb_frames; i++) {
1541         AVPacket pkt;
1542         av_init_packet(&pkt);
1543         pkt.data = NULL;
1544         pkt.size = 0;
1545
1546         if (!check_recording_time(ost))
1547             return;
1548
1549         if (s->oformat->flags & AVFMT_RAWPICTURE &&
1550             enc->codec->id == CODEC_ID_RAWVIDEO) {
1551             /* raw pictures are written as AVPicture structure to
1552                avoid any copies. We support temporarily the older
1553                method. */
1554             enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1555             enc->coded_frame->top_field_first  = in_picture->top_field_first;
1556             pkt.data   = (uint8_t *)in_picture;
1557             pkt.size   =  sizeof(AVPicture);
1558             pkt.pts    = av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
1559             pkt.flags |= AV_PKT_FLAG_KEY;
1560
1561             write_frame(s, &pkt, ost);
1562         } else {
1563             int got_packet;
1564             AVFrame big_picture;
1565
1566             big_picture = *in_picture;
1567             /* better than nothing: use input picture interlaced
1568                settings */
1569             big_picture.interlaced_frame = in_picture->interlaced_frame;
1570             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1571                 if (ost->top_field_first == -1)
1572                     big_picture.top_field_first = in_picture->top_field_first;
1573                 else
1574                     big_picture.top_field_first = !!ost->top_field_first;
1575             }
1576
1577             /* handles same_quant here. This is not correct because it may
1578                not be a global option */
1579             big_picture.quality = quality;
1580             if (!enc->me_threshold)
1581                 big_picture.pict_type = 0;
1582             big_picture.pts = ost->sync_opts;
1583             if (ost->forced_kf_index < ost->forced_kf_count &&
1584                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1585                 big_picture.pict_type = AV_PICTURE_TYPE_I;
1586                 ost->forced_kf_index++;
1587             }
1588             ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1589             if (ret < 0) {
1590                 av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1591                 exit_program(1);
1592             }
1593
1594             if (got_packet) {
1595                 if (pkt.pts != AV_NOPTS_VALUE)
1596                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1597                 if (pkt.dts != AV_NOPTS_VALUE)
1598                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1599
1600                 write_frame(s, &pkt, ost);
1601                 *frame_size = pkt.size;
1602                 video_size += pkt.size;
1603
1604                 /* if two pass, output log */
1605                 if (ost->logfile && enc->stats_out) {
1606                     fprintf(ost->logfile, "%s", enc->stats_out);
1607                 }
1608             }
1609         }
1610         ost->sync_opts++;
1611         /*
1612          * For video, number of frames in == number of packets out.
1613          * But there may be reordering, so we can't throw away frames on encoder
1614          * flush, we need to limit them here, before they go into encoder.
1615          */
1616         ost->frame_number++;
1617     }
1618 }
1619
1620 static double psnr(double d)
1621 {
1622     return -10.0 * log(d) / log(10.0);
1623 }
1624
1625 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1626                            int frame_size)
1627 {
1628     AVCodecContext *enc;
1629     int frame_number;
1630     double ti1, bitrate, avg_bitrate;
1631
1632     /* this is executed just the first time do_video_stats is called */
1633     if (!vstats_file) {
1634         vstats_file = fopen(vstats_filename, "w");
1635         if (!vstats_file) {
1636             perror("fopen");
1637             exit_program(1);
1638         }
1639     }
1640
1641     enc = ost->st->codec;
1642     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1643         frame_number = ost->frame_number;
1644         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1645         if (enc->flags&CODEC_FLAG_PSNR)
1646             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1647
1648         fprintf(vstats_file,"f_size= %6d ", frame_size);
1649         /* compute pts value */
1650         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1651         if (ti1 < 0.01)
1652             ti1 = 0.01;
1653
1654         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1655         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1656         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1657                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1658         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1659     }
1660 }
1661
1662 /* check for new output on any of the filtergraphs */
1663 static int poll_filters(void)
1664 {
1665     AVFilterBufferRef *picref;
1666     AVFrame *filtered_frame = NULL;
1667     int i, frame_size;
1668
1669     for (i = 0; i < nb_output_streams; i++) {
1670         OutputStream *ost = output_streams[i];
1671         OutputFile    *of = output_files[ost->file_index];
1672         int ret = 0;
1673
1674         if (!ost->filter || ost->is_past_recording_time)
1675             continue;
1676
1677         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1678             return AVERROR(ENOMEM);
1679         } else
1680             avcodec_get_frame_defaults(ost->filtered_frame);
1681         filtered_frame = ost->filtered_frame;
1682
1683         while (ret >= 0) {
1684             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1685                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1686                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1687                                                  ost->st->codec->frame_size);
1688             else
1689                 ret = av_buffersink_read(ost->filter->filter, &picref);
1690
1691             if (ret < 0)
1692                 break;
1693
1694             avfilter_copy_buf_props(filtered_frame, picref);
1695             if (ost->enc->type == AVMEDIA_TYPE_VIDEO)
1696                 filtered_frame->pts = av_rescale_q(picref->pts,
1697                                                    ost->filter->filter->inputs[0]->time_base,
1698                                                    AV_TIME_BASE_Q);
1699             else if (picref->pts != AV_NOPTS_VALUE)
1700                 filtered_frame->pts = av_rescale_q(picref->pts,
1701                                                    ost->filter->filter->inputs[0]->time_base,
1702                                                    ost->st->codec->time_base) -
1703                                       av_rescale_q(of->start_time,
1704                                                    AV_TIME_BASE_Q,
1705                                                    ost->st->codec->time_base);
1706
1707             if (of->start_time && filtered_frame->pts < of->start_time) {
1708                 avfilter_unref_buffer(picref);
1709                 continue;
1710             }
1711
1712             switch (ost->filter->filter->inputs[0]->type) {
1713             case AVMEDIA_TYPE_VIDEO:
1714                 if (!ost->frame_aspect_ratio)
1715                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1716
1717                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1718                              same_quant ? ost->last_quality :
1719                                           ost->st->codec->global_quality);
1720                 if (vstats_filename && frame_size)
1721                     do_video_stats(of->ctx, ost, frame_size);
1722                 break;
1723             case AVMEDIA_TYPE_AUDIO:
1724                 do_audio_out(of->ctx, ost, filtered_frame);
1725                 break;
1726             default:
1727                 // TODO support subtitle filters
1728                 av_assert0(0);
1729             }
1730
1731             avfilter_unref_buffer(picref);
1732         }
1733     }
1734     return 0;
1735 }
1736
1737 static void print_report(int is_last_report, int64_t timer_start)
1738 {
1739     char buf[1024];
1740     OutputStream *ost;
1741     AVFormatContext *oc;
1742     int64_t total_size;
1743     AVCodecContext *enc;
1744     int frame_number, vid, i;
1745     double bitrate, ti1, pts;
1746     static int64_t last_time = -1;
1747     static int qp_histogram[52];
1748
1749     if (!print_stats && !is_last_report)
1750         return;
1751
1752     if (!is_last_report) {
1753         int64_t cur_time;
1754         /* display the report every 0.5 seconds */
1755         cur_time = av_gettime();
1756         if (last_time == -1) {
1757             last_time = cur_time;
1758             return;
1759         }
1760         if ((cur_time - last_time) < 500000)
1761             return;
1762         last_time = cur_time;
1763     }
1764
1765
1766     oc = output_files[0]->ctx;
1767
1768     total_size = avio_size(oc->pb);
1769     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1770         total_size = avio_tell(oc->pb);
1771
1772     buf[0] = '\0';
1773     ti1 = 1e10;
1774     vid = 0;
1775     for (i = 0; i < nb_output_streams; i++) {
1776         float q = -1;
1777         ost = output_streams[i];
1778         enc = ost->st->codec;
1779         if (!ost->stream_copy && enc->coded_frame)
1780             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1781         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1782             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1783         }
1784         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1785             float t = (av_gettime() - timer_start) / 1000000.0;
1786
1787             frame_number = ost->frame_number;
1788             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1789                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1790             if (is_last_report)
1791                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1792             if (qp_hist) {
1793                 int j;
1794                 int qp = lrintf(q);
1795                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1796                     qp_histogram[qp]++;
1797                 for (j = 0; j < 32; j++)
1798                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1799             }
1800             if (enc->flags&CODEC_FLAG_PSNR) {
1801                 int j;
1802                 double error, error_sum = 0;
1803                 double scale, scale_sum = 0;
1804                 char type[3] = { 'Y','U','V' };
1805                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1806                 for (j = 0; j < 3; j++) {
1807                     if (is_last_report) {
1808                         error = enc->error[j];
1809                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1810                     } else {
1811                         error = enc->coded_frame->error[j];
1812                         scale = enc->width * enc->height * 255.0 * 255.0;
1813                     }
1814                     if (j)
1815                         scale /= 4;
1816                     error_sum += error;
1817                     scale_sum += scale;
1818                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1819                 }
1820                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1821             }
1822             vid = 1;
1823         }
1824         /* compute min output value */
1825         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1826         if ((pts < ti1) && (pts > 0))
1827             ti1 = pts;
1828     }
1829     if (ti1 < 0.01)
1830         ti1 = 0.01;
1831
1832     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1833
1834     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1835             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1836             (double)total_size / 1024, ti1, bitrate);
1837
1838     if (nb_frames_dup || nb_frames_drop)
1839         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1840                 nb_frames_dup, nb_frames_drop);
1841
1842     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1843
1844     fflush(stderr);
1845
1846     if (is_last_report) {
1847         int64_t raw= audio_size + video_size + extra_size;
1848         av_log(NULL, AV_LOG_INFO, "\n");
1849         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1850                video_size / 1024.0,
1851                audio_size / 1024.0,
1852                extra_size / 1024.0,
1853                100.0 * (total_size - raw) / raw
1854         );
1855     }
1856 }
1857
1858 static void flush_encoders(void)
1859 {
1860     int i, ret;
1861
1862     for (i = 0; i < nb_output_streams; i++) {
1863         OutputStream   *ost = output_streams[i];
1864         AVCodecContext *enc = ost->st->codec;
1865         AVFormatContext *os = output_files[ost->file_index]->ctx;
1866         int stop_encoding = 0;
1867
1868         if (!ost->encoding_needed)
1869             continue;
1870
1871         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1872             continue;
1873         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1874             continue;
1875
1876         for (;;) {
1877             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1878             const char *desc;
1879             int64_t *size;
1880
1881             switch (ost->st->codec->codec_type) {
1882             case AVMEDIA_TYPE_AUDIO:
1883                 encode = avcodec_encode_audio2;
1884                 desc   = "Audio";
1885                 size   = &audio_size;
1886                 break;
1887             case AVMEDIA_TYPE_VIDEO:
1888                 encode = avcodec_encode_video2;
1889                 desc   = "Video";
1890                 size   = &video_size;
1891                 break;
1892             default:
1893                 stop_encoding = 1;
1894             }
1895
1896             if (encode) {
1897                 AVPacket pkt;
1898                 int got_packet;
1899                 av_init_packet(&pkt);
1900                 pkt.data = NULL;
1901                 pkt.size = 0;
1902
1903                 ret = encode(enc, &pkt, NULL, &got_packet);
1904                 if (ret < 0) {
1905                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1906                     exit_program(1);
1907                 }
1908                 *size += ret;
1909                 if (ost->logfile && enc->stats_out) {
1910                     fprintf(ost->logfile, "%s", enc->stats_out);
1911                 }
1912                 if (!got_packet) {
1913                     stop_encoding = 1;
1914                     break;
1915                 }
1916                 if (pkt.pts != AV_NOPTS_VALUE)
1917                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1918                 if (pkt.dts != AV_NOPTS_VALUE)
1919                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1920                 write_frame(os, &pkt, ost);
1921             }
1922
1923             if (stop_encoding)
1924                 break;
1925         }
1926     }
1927 }
1928
1929 /*
1930  * Check whether a packet from ist should be written into ost at this time
1931  */
1932 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1933 {
1934     OutputFile *of = output_files[ost->file_index];
1935     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1936
1937     if (ost->source_index != ist_index)
1938         return 0;
1939
1940     if (of->start_time && ist->last_dts < of->start_time)
1941         return 0;
1942
1943     return 1;
1944 }
1945
1946 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1947 {
1948     OutputFile *of = output_files[ost->file_index];
1949     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1950     AVPacket opkt;
1951
1952     av_init_packet(&opkt);
1953
1954     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1955         !ost->copy_initial_nonkeyframes)
1956         return;
1957
1958     if (of->recording_time != INT64_MAX &&
1959         ist->last_dts >= of->recording_time + of->start_time) {
1960         ost->is_past_recording_time = 1;
1961         return;
1962     }
1963
1964     /* force the input stream PTS */
1965     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1966         audio_size += pkt->size;
1967     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1968         video_size += pkt->size;
1969         ost->sync_opts++;
1970     }
1971
1972     if (pkt->pts != AV_NOPTS_VALUE)
1973         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1974     else
1975         opkt.pts = AV_NOPTS_VALUE;
1976
1977     if (pkt->dts == AV_NOPTS_VALUE)
1978         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1979     else
1980         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1981     opkt.dts -= ost_tb_start_time;
1982
1983     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1984     opkt.flags    = pkt->flags;
1985
1986     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1987     if (  ost->st->codec->codec_id != CODEC_ID_H264
1988        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1989        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1990        && ost->st->codec->codec_id != CODEC_ID_VC1
1991        ) {
1992         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1993             opkt.destruct = av_destruct_packet;
1994     } else {
1995         opkt.data = pkt->data;
1996         opkt.size = pkt->size;
1997     }
1998
1999     write_frame(of->ctx, &opkt, ost);
2000     ost->st->codec->frame_number++;
2001     av_free_packet(&opkt);
2002 }
2003
2004 static void rate_emu_sleep(InputStream *ist)
2005 {
2006     if (input_files[ist->file_index]->rate_emu) {
2007         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
2008         int64_t now = av_gettime() - ist->start;
2009         if (pts > now)
2010             usleep(pts - now);
2011     }
2012 }
2013
2014 static int guess_input_channel_layout(InputStream *ist)
2015 {
2016     AVCodecContext *dec = ist->st->codec;
2017
2018     if (!dec->channel_layout) {
2019         char layout_name[256];
2020
2021         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2022         if (!dec->channel_layout)
2023             return 0;
2024         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2025                                      dec->channels, dec->channel_layout);
2026         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2027                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2028     }
2029     return 1;
2030 }
2031
2032 static int transcode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2033 {
2034     AVFrame *decoded_frame;
2035     AVCodecContext *avctx = ist->st->codec;
2036     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
2037     int i, ret, resample_changed;
2038
2039     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2040         return AVERROR(ENOMEM);
2041     else
2042         avcodec_get_frame_defaults(ist->decoded_frame);
2043     decoded_frame = ist->decoded_frame;
2044
2045     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2046     if (ret < 0) {
2047         return ret;
2048     }
2049
2050     if (!*got_output) {
2051         /* no audio frame */
2052         if (!pkt->size)
2053             for (i = 0; i < ist->nb_filters; i++)
2054                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2055         return ret;
2056     }
2057
2058     /* if the decoder provides a pts, use it instead of the last packet pts.
2059        the decoder could be delaying output by a packet or more. */
2060     if (decoded_frame->pts != AV_NOPTS_VALUE)
2061         ist->next_dts = decoded_frame->pts;
2062     else if (pkt->pts != AV_NOPTS_VALUE) {
2063         decoded_frame->pts = pkt->pts;
2064         pkt->pts           = AV_NOPTS_VALUE;
2065     }
2066
2067     // preprocess audio (volume)
2068     if (audio_volume != 256) {
2069         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
2070         void *samples = decoded_frame->data[0];
2071         switch (avctx->sample_fmt) {
2072         case AV_SAMPLE_FMT_U8:
2073         {
2074             uint8_t *volp = samples;
2075             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2076                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
2077                 *volp++ = av_clip_uint8(v);
2078             }
2079             break;
2080         }
2081         case AV_SAMPLE_FMT_S16:
2082         {
2083             int16_t *volp = samples;
2084             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2085                 int v = ((*volp) * audio_volume + 128) >> 8;
2086                 *volp++ = av_clip_int16(v);
2087             }
2088             break;
2089         }
2090         case AV_SAMPLE_FMT_S32:
2091         {
2092             int32_t *volp = samples;
2093             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2094                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2095                 *volp++ = av_clipl_int32(v);
2096             }
2097             break;
2098         }
2099         case AV_SAMPLE_FMT_FLT:
2100         {
2101             float *volp = samples;
2102             float scale = audio_volume / 256.f;
2103             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2104                 *volp++ *= scale;
2105             }
2106             break;
2107         }
2108         case AV_SAMPLE_FMT_DBL:
2109         {
2110             double *volp = samples;
2111             double scale = audio_volume / 256.;
2112             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2113                 *volp++ *= scale;
2114             }
2115             break;
2116         }
2117         default:
2118             av_log(NULL, AV_LOG_FATAL,
2119                    "Audio volume adjustment on sample format %s is not supported.\n",
2120                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2121             exit_program(1);
2122         }
2123     }
2124
2125     rate_emu_sleep(ist);
2126
2127     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2128                        ist->resample_channels       != avctx->channels               ||
2129                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2130                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2131     if (resample_changed) {
2132         char layout1[64], layout2[64];
2133
2134         if (!guess_input_channel_layout(ist)) {
2135             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2136                    "layout for Input Stream #%d.%d\n", ist->file_index,
2137                    ist->st->index);
2138             exit_program(1);
2139         }
2140         decoded_frame->channel_layout = avctx->channel_layout;
2141
2142         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2143                                      ist->resample_channel_layout);
2144         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2145                                      decoded_frame->channel_layout);
2146
2147         av_log(NULL, AV_LOG_INFO,
2148                "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:%s to rate:%d fmt:%s ch:%d chl:%s\n",
2149                ist->file_index, ist->st->index,
2150                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2151                ist->resample_channels, layout1,
2152                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2153                avctx->channels, layout2);
2154
2155         ist->resample_sample_fmt     = decoded_frame->format;
2156         ist->resample_sample_rate    = decoded_frame->sample_rate;
2157         ist->resample_channel_layout = decoded_frame->channel_layout;
2158         ist->resample_channels       = avctx->channels;
2159
2160         for (i = 0; i < nb_filtergraphs; i++)
2161             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2162                 configure_filtergraph(filtergraphs[i]) < 0) {
2163                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2164                 exit_program(1);
2165             }
2166     }
2167
2168     for (i = 0; i < ist->nb_filters; i++)
2169         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2170
2171     return ret;
2172 }
2173
2174 static int transcode_video(InputStream *ist, AVPacket *pkt, int *got_output, int64_t *pkt_pts)
2175 {
2176     AVFrame *decoded_frame;
2177     void *buffer_to_free = NULL;
2178     int i, ret = 0, resample_changed;
2179     float quality;
2180
2181     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2182         return AVERROR(ENOMEM);
2183     else
2184         avcodec_get_frame_defaults(ist->decoded_frame);
2185     decoded_frame = ist->decoded_frame;
2186     pkt->pts  = *pkt_pts;
2187     pkt->dts  = ist->last_dts;
2188     *pkt_pts  = AV_NOPTS_VALUE;
2189
2190     ret = avcodec_decode_video2(ist->st->codec,
2191                                 decoded_frame, got_output, pkt);
2192     if (ret < 0)
2193         return ret;
2194
2195     quality = same_quant ? decoded_frame->quality : 0;
2196     if (!*got_output) {
2197         /* no picture yet */
2198         if (!pkt->size)
2199             for (i = 0; i < ist->nb_filters; i++)
2200                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2201         return ret;
2202     }
2203     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2204                                            decoded_frame->pkt_dts);
2205     pkt->size = 0;
2206     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2207
2208     rate_emu_sleep(ist);
2209
2210     if (ist->st->sample_aspect_ratio.num)
2211         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2212
2213     resample_changed = ist->resample_width   != decoded_frame->width  ||
2214                        ist->resample_height  != decoded_frame->height ||
2215                        ist->resample_pix_fmt != decoded_frame->format;
2216     if (resample_changed) {
2217         av_log(NULL, AV_LOG_INFO,
2218                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2219                ist->file_index, ist->st->index,
2220                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2221                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2222
2223         ist->resample_width   = decoded_frame->width;
2224         ist->resample_height  = decoded_frame->height;
2225         ist->resample_pix_fmt = decoded_frame->format;
2226
2227         for (i = 0; i < nb_filtergraphs; i++)
2228             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2229                 configure_filtergraph(filtergraphs[i]) < 0) {
2230                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2231                 exit_program(1);
2232             }
2233     }
2234
2235     for (i = 0; i < ist->nb_filters; i++) {
2236         // XXX what an ugly hack
2237         if (ist->filters[i]->graph->nb_outputs == 1)
2238             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2239
2240         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2241             FrameBuffer      *buf = decoded_frame->opaque;
2242             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2243                                         decoded_frame->data, decoded_frame->linesize,
2244                                         AV_PERM_READ | AV_PERM_PRESERVE,
2245                                         ist->st->codec->width, ist->st->codec->height,
2246                                         ist->st->codec->pix_fmt);
2247
2248             avfilter_copy_frame_props(fb, decoded_frame);
2249             fb->buf->priv           = buf;
2250             fb->buf->free           = filter_release_buffer;
2251
2252             buf->refcount++;
2253             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2254         } else
2255             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2256     }
2257
2258     av_free(buffer_to_free);
2259     return ret;
2260 }
2261
2262 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2263 {
2264     AVSubtitle subtitle;
2265     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2266                                           &subtitle, got_output, pkt);
2267     if (ret < 0)
2268         return ret;
2269     if (!*got_output)
2270         return ret;
2271
2272     rate_emu_sleep(ist);
2273
2274     for (i = 0; i < nb_output_streams; i++) {
2275         OutputStream *ost = output_streams[i];
2276
2277         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2278             continue;
2279
2280         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2281     }
2282
2283     avsubtitle_free(&subtitle);
2284     return ret;
2285 }
2286
2287 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2288 static int output_packet(InputStream *ist, const AVPacket *pkt)
2289 {
2290     int i;
2291     int got_output;
2292     int64_t pkt_pts = AV_NOPTS_VALUE;
2293     AVPacket avpkt;
2294
2295     if (ist->next_dts == AV_NOPTS_VALUE)
2296         ist->next_dts = ist->last_dts;
2297
2298     if (pkt == NULL) {
2299         /* EOF handling */
2300         av_init_packet(&avpkt);
2301         avpkt.data = NULL;
2302         avpkt.size = 0;
2303         goto handle_eof;
2304     } else {
2305         avpkt = *pkt;
2306     }
2307
2308     if (pkt->dts != AV_NOPTS_VALUE)
2309         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2310     if (pkt->pts != AV_NOPTS_VALUE)
2311         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
2312
2313     // while we have more to decode or while the decoder did output something on EOF
2314     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2315         int ret = 0;
2316     handle_eof:
2317
2318         ist->last_dts = ist->next_dts;
2319
2320         if (avpkt.size && avpkt.size != pkt->size) {
2321             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2322                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2323             ist->showed_multi_packet_warning = 1;
2324         }
2325
2326         switch (ist->st->codec->codec_type) {
2327         case AVMEDIA_TYPE_AUDIO:
2328             ret = transcode_audio    (ist, &avpkt, &got_output);
2329             break;
2330         case AVMEDIA_TYPE_VIDEO:
2331             ret = transcode_video    (ist, &avpkt, &got_output, &pkt_pts);
2332             if (avpkt.duration)
2333                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2334             else if (ist->st->r_frame_rate.num)
2335                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2336                                                               ist->st->r_frame_rate.num},
2337                                               AV_TIME_BASE_Q);
2338             else if (ist->st->codec->time_base.num != 0) {
2339                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2340                                                    ist->st->codec->ticks_per_frame;
2341                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2342             }
2343             break;
2344         case AVMEDIA_TYPE_SUBTITLE:
2345             ret = transcode_subtitles(ist, &avpkt, &got_output);
2346             break;
2347         default:
2348             return -1;
2349         }
2350
2351         if (ret < 0)
2352             return ret;
2353         // touch data and size only if not EOF
2354         if (pkt) {
2355             avpkt.data += ret;
2356             avpkt.size -= ret;
2357         }
2358         if (!got_output) {
2359             continue;
2360         }
2361     }
2362
2363     /* handle stream copy */
2364     if (!ist->decoding_needed) {
2365         rate_emu_sleep(ist);
2366         ist->last_dts = ist->next_dts;
2367         switch (ist->st->codec->codec_type) {
2368         case AVMEDIA_TYPE_AUDIO:
2369             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2370                              ist->st->codec->sample_rate;
2371             break;
2372         case AVMEDIA_TYPE_VIDEO:
2373             if (ist->st->codec->time_base.num != 0) {
2374                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2375                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2376                                   ist->st->codec->time_base.num * ticks) /
2377                                   ist->st->codec->time_base.den;
2378             }
2379             break;
2380         }
2381     }
2382     for (i = 0; pkt && i < nb_output_streams; i++) {
2383         OutputStream *ost = output_streams[i];
2384
2385         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2386             continue;
2387
2388         do_streamcopy(ist, ost, pkt);
2389     }
2390
2391     return 0;
2392 }
2393
2394 static void print_sdp(void)
2395 {
2396     char sdp[2048];
2397     int i;
2398     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2399
2400     if (!avc)
2401         exit_program(1);
2402     for (i = 0; i < nb_output_files; i++)
2403         avc[i] = output_files[i]->ctx;
2404
2405     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2406     printf("SDP:\n%s\n", sdp);
2407     fflush(stdout);
2408     av_freep(&avc);
2409 }
2410
2411 static int init_input_stream(int ist_index, char *error, int error_len)
2412 {
2413     int i;
2414     InputStream *ist = input_streams[ist_index];
2415     if (ist->decoding_needed) {
2416         AVCodec *codec = ist->dec;
2417         if (!codec) {
2418             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2419                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2420             return AVERROR(EINVAL);
2421         }
2422
2423         /* update requested sample format for the decoder based on the
2424            corresponding encoder sample format */
2425         for (i = 0; i < nb_output_streams; i++) {
2426             OutputStream *ost = output_streams[i];
2427             if (ost->source_index == ist_index) {
2428                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2429                 break;
2430             }
2431         }
2432
2433         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2434             ist->st->codec->get_buffer     = codec_get_buffer;
2435             ist->st->codec->release_buffer = codec_release_buffer;
2436             ist->st->codec->opaque         = ist;
2437         }
2438
2439         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2440             av_dict_set(&ist->opts, "threads", "auto", 0);
2441         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2442             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2443                     ist->file_index, ist->st->index);
2444             return AVERROR(EINVAL);
2445         }
2446         assert_codec_experimental(ist->st->codec, 0);
2447         assert_avoptions(ist->opts);
2448     }
2449
2450     ist->last_dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
2451     ist->next_dts = AV_NOPTS_VALUE;
2452     init_pts_correction(&ist->pts_ctx);
2453     ist->is_start = 1;
2454
2455     return 0;
2456 }
2457
2458 static InputStream *get_input_stream(OutputStream *ost)
2459 {
2460     if (ost->source_index >= 0)
2461         return input_streams[ost->source_index];
2462
2463     if (ost->filter) {
2464         FilterGraph *fg = ost->filter->graph;
2465         int i;
2466
2467         for (i = 0; i < fg->nb_inputs; i++)
2468             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2469                 return fg->inputs[i]->ist;
2470     }
2471
2472     return NULL;
2473 }
2474
2475 static int transcode_init(void)
2476 {
2477     int ret = 0, i, j, k;
2478     AVFormatContext *oc;
2479     AVCodecContext *codec, *icodec;
2480     OutputStream *ost;
2481     InputStream *ist;
2482     char error[1024];
2483     int want_sdp = 1;
2484
2485     /* init framerate emulation */
2486     for (i = 0; i < nb_input_files; i++) {
2487         InputFile *ifile = input_files[i];
2488         if (ifile->rate_emu)
2489             for (j = 0; j < ifile->nb_streams; j++)
2490                 input_streams[j + ifile->ist_index]->start = av_gettime();
2491     }
2492
2493     /* output stream init */
2494     for (i = 0; i < nb_output_files; i++) {
2495         oc = output_files[i]->ctx;
2496         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2497             av_dump_format(oc, i, oc->filename, 1);
2498             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2499             return AVERROR(EINVAL);
2500         }
2501     }
2502
2503     /* init complex filtergraphs */
2504     for (i = 0; i < nb_filtergraphs; i++)
2505         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2506             return ret;
2507
2508     /* for each output stream, we compute the right encoding parameters */
2509     for (i = 0; i < nb_output_streams; i++) {
2510         ost = output_streams[i];
2511         oc  = output_files[ost->file_index]->ctx;
2512         ist = get_input_stream(ost);
2513
2514         if (ost->attachment_filename)
2515             continue;
2516
2517         codec  = ost->st->codec;
2518
2519         if (ist) {
2520             icodec = ist->st->codec;
2521
2522             ost->st->disposition          = ist->st->disposition;
2523             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2524             codec->chroma_sample_location = icodec->chroma_sample_location;
2525         }
2526
2527         if (ost->stream_copy) {
2528             uint64_t extra_size;
2529
2530             av_assert0(ist && !ost->filter);
2531
2532             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2533
2534             if (extra_size > INT_MAX) {
2535                 return AVERROR(EINVAL);
2536             }
2537
2538             /* if stream_copy is selected, no need to decode or encode */
2539             codec->codec_id   = icodec->codec_id;
2540             codec->codec_type = icodec->codec_type;
2541
2542             if (!codec->codec_tag) {
2543                 if (!oc->oformat->codec_tag ||
2544                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2545                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2546                     codec->codec_tag = icodec->codec_tag;
2547             }
2548
2549             codec->bit_rate       = icodec->bit_rate;
2550             codec->rc_max_rate    = icodec->rc_max_rate;
2551             codec->rc_buffer_size = icodec->rc_buffer_size;
2552             codec->field_order    = icodec->field_order;
2553             codec->extradata      = av_mallocz(extra_size);
2554             if (!codec->extradata) {
2555                 return AVERROR(ENOMEM);
2556             }
2557             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2558             codec->extradata_size = icodec->extradata_size;
2559             if (!copy_tb) {
2560                 codec->time_base      = icodec->time_base;
2561                 codec->time_base.num *= icodec->ticks_per_frame;
2562                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2563                           codec->time_base.num, codec->time_base.den, INT_MAX);
2564             } else
2565                 codec->time_base = ist->st->time_base;
2566
2567             switch (codec->codec_type) {
2568             case AVMEDIA_TYPE_AUDIO:
2569                 if (audio_volume != 256) {
2570                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2571                     exit_program(1);
2572                 }
2573                 codec->channel_layout     = icodec->channel_layout;
2574                 codec->sample_rate        = icodec->sample_rate;
2575                 codec->channels           = icodec->channels;
2576                 codec->frame_size         = icodec->frame_size;
2577                 codec->audio_service_type = icodec->audio_service_type;
2578                 codec->block_align        = icodec->block_align;
2579                 break;
2580             case AVMEDIA_TYPE_VIDEO:
2581                 codec->pix_fmt            = icodec->pix_fmt;
2582                 codec->width              = icodec->width;
2583                 codec->height             = icodec->height;
2584                 codec->has_b_frames       = icodec->has_b_frames;
2585                 if (!codec->sample_aspect_ratio.num) {
2586                     codec->sample_aspect_ratio   =
2587                     ost->st->sample_aspect_ratio =
2588                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2589                         ist->st->codec->sample_aspect_ratio.num ?
2590                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2591                 }
2592                 break;
2593             case AVMEDIA_TYPE_SUBTITLE:
2594                 codec->width  = icodec->width;
2595                 codec->height = icodec->height;
2596                 break;
2597             case AVMEDIA_TYPE_DATA:
2598             case AVMEDIA_TYPE_ATTACHMENT:
2599                 break;
2600             default:
2601                 abort();
2602             }
2603         } else {
2604             if (!ost->enc) {
2605                 /* should only happen when a default codec is not present. */
2606                 snprintf(error, sizeof(error), "Automatic encoder selection "
2607                          "failed for output stream #%d:%d. Default encoder for "
2608                          "format %s is probably disabled. Please choose an "
2609                          "encoder manually.\n", ost->file_index, ost->index,
2610                          oc->oformat->name);
2611                 ret = AVERROR(EINVAL);
2612                 goto dump_format;
2613             }
2614
2615             if (ist)
2616                 ist->decoding_needed = 1;
2617             ost->encoding_needed = 1;
2618
2619             if (!ost->filter &&
2620                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2621                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2622                     FilterGraph *fg;
2623                     fg = init_simple_filtergraph(ist, ost);
2624                     if (configure_simple_filtergraph(fg)) {
2625                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2626                         exit(1);
2627                     }
2628             }
2629
2630             switch (codec->codec_type) {
2631             case AVMEDIA_TYPE_AUDIO:
2632                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2633                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2634                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2635                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2636                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2637                 break;
2638             case AVMEDIA_TYPE_VIDEO:
2639                 /*
2640                  * We want CFR output if and only if one of those is true:
2641                  * 1) user specified output framerate with -r
2642                  * 2) user specified -vsync cfr
2643                  * 3) output format is CFR and the user didn't force vsync to
2644                  *    something else than CFR
2645                  *
2646                  * in such a case, set ost->frame_rate
2647                  */
2648                 if (!ost->frame_rate.num && ist &&
2649                     (video_sync_method ==  VSYNC_CFR ||
2650                      (video_sync_method ==  VSYNC_AUTO &&
2651                       !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2652                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2653                     if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2654                         int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2655                         ost->frame_rate = ost->enc->supported_framerates[idx];
2656                     }
2657                 }
2658                 if (ost->frame_rate.num) {
2659                     codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};
2660                     video_sync_method = VSYNC_CFR;
2661                 } else if (ist)
2662                     codec->time_base = ist->st->time_base;
2663                 else
2664                     codec->time_base = ost->filter->filter->inputs[0]->time_base;
2665
2666                 codec->width  = ost->filter->filter->inputs[0]->w;
2667                 codec->height = ost->filter->filter->inputs[0]->h;
2668                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2669                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2670                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2671                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2672                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2673
2674                 if (codec->width   != icodec->width  ||
2675                     codec->height  != icodec->height ||
2676                     codec->pix_fmt != icodec->pix_fmt) {
2677                     codec->bits_per_raw_sample = 0;
2678                 }
2679
2680                 break;
2681             case AVMEDIA_TYPE_SUBTITLE:
2682                 codec->time_base = (AVRational){1, 1000};
2683                 break;
2684             default:
2685                 abort();
2686                 break;
2687             }
2688             /* two pass mode */
2689             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2690                 char logfilename[1024];
2691                 FILE *f;
2692
2693                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2694                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2695                          i);
2696                 if (!strcmp(ost->enc->name, "libx264")) {
2697                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2698                 } else {
2699                     if (codec->flags & CODEC_FLAG_PASS1) {
2700                         f = fopen(logfilename, "wb");
2701                         if (!f) {
2702                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2703                                    logfilename, strerror(errno));
2704                             exit_program(1);
2705                         }
2706                         ost->logfile = f;
2707                     } else {
2708                         char  *logbuffer;
2709                         size_t logbuffer_size;
2710                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2711                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2712                                    logfilename);
2713                             exit_program(1);
2714                         }
2715                         codec->stats_in = logbuffer;
2716                     }
2717                 }
2718             }
2719         }
2720     }
2721
2722     /* open each encoder */
2723     for (i = 0; i < nb_output_streams; i++) {
2724         ost = output_streams[i];
2725         if (ost->encoding_needed) {
2726             AVCodec      *codec = ost->enc;
2727             AVCodecContext *dec = NULL;
2728
2729             if ((ist = get_input_stream(ost)))
2730                 dec = ist->st->codec;
2731             if (dec && dec->subtitle_header) {
2732                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2733                 if (!ost->st->codec->subtitle_header) {
2734                     ret = AVERROR(ENOMEM);
2735                     goto dump_format;
2736                 }
2737                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2738                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2739             }
2740             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2741                 av_dict_set(&ost->opts, "threads", "auto", 0);
2742             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2743                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2744                         ost->file_index, ost->index);
2745                 ret = AVERROR(EINVAL);
2746                 goto dump_format;
2747             }
2748             assert_codec_experimental(ost->st->codec, 1);
2749             assert_avoptions(ost->opts);
2750             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2751                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2752                                              "It takes bits/s as argument, not kbits/s\n");
2753             extra_size += ost->st->codec->extradata_size;
2754
2755             if (ost->st->codec->me_threshold)
2756                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2757         }
2758     }
2759
2760     /* init input streams */
2761     for (i = 0; i < nb_input_streams; i++)
2762         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2763             goto dump_format;
2764
2765     /* discard unused programs */
2766     for (i = 0; i < nb_input_files; i++) {
2767         InputFile *ifile = input_files[i];
2768         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2769             AVProgram *p = ifile->ctx->programs[j];
2770             int discard  = AVDISCARD_ALL;
2771
2772             for (k = 0; k < p->nb_stream_indexes; k++)
2773                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2774                     discard = AVDISCARD_DEFAULT;
2775                     break;
2776                 }
2777             p->discard = discard;
2778         }
2779     }
2780
2781     /* open files and write file headers */
2782     for (i = 0; i < nb_output_files; i++) {
2783         oc = output_files[i]->ctx;
2784         oc->interrupt_callback = int_cb;
2785         if (avformat_write_header(oc, &output_files[i]->opts) < 0) {
2786             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
2787             ret = AVERROR(EINVAL);
2788             goto dump_format;
2789         }
2790         assert_avoptions(output_files[i]->opts);
2791         if (strcmp(oc->oformat->name, "rtp")) {
2792             want_sdp = 0;
2793         }
2794     }
2795
2796  dump_format:
2797     /* dump the file output parameters - cannot be done before in case
2798        of stream copy */
2799     for (i = 0; i < nb_output_files; i++) {
2800         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2801     }
2802
2803     /* dump the stream mapping */
2804     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2805     for (i = 0; i < nb_input_streams; i++) {
2806         ist = input_streams[i];
2807
2808         for (j = 0; j < ist->nb_filters; j++) {
2809             AVFilterLink *link = ist->filters[j]->filter->outputs[0];
2810             if (ist->filters[j]->graph->graph_desc) {
2811                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2812                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2813                        link->dst->filter->name);
2814                 if (link->dst->input_count > 1)
2815                     av_log(NULL, AV_LOG_INFO, ":%s", link->dstpad->name);
2816                 if (nb_filtergraphs > 1)
2817                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2818                 av_log(NULL, AV_LOG_INFO, "\n");
2819             }
2820         }
2821     }
2822
2823     for (i = 0; i < nb_output_streams; i++) {
2824         ost = output_streams[i];
2825
2826         if (ost->attachment_filename) {
2827             /* an attached file */
2828             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2829                    ost->attachment_filename, ost->file_index, ost->index);
2830             continue;
2831         }
2832
2833         if (ost->filter && ost->filter->graph->graph_desc) {
2834             /* output from a complex graph */
2835             AVFilterLink *link = ost->filter->filter->inputs[0];
2836             av_log(NULL, AV_LOG_INFO, "  %s", link->src->filter->name);
2837             if (link->src->output_count > 1)
2838                 av_log(NULL, AV_LOG_INFO, ":%s", link->srcpad->name);
2839             if (nb_filtergraphs > 1)
2840                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2841
2842             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2843                    ost->index, ost->enc ? ost->enc->name : "?");
2844             continue;
2845         }
2846
2847         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2848                input_streams[ost->source_index]->file_index,
2849                input_streams[ost->source_index]->st->index,
2850                ost->file_index,
2851                ost->index);
2852         if (ost->sync_ist != input_streams[ost->source_index])
2853             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2854                    ost->sync_ist->file_index,
2855                    ost->sync_ist->st->index);
2856         if (ost->stream_copy)
2857             av_log(NULL, AV_LOG_INFO, " (copy)");
2858         else
2859             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2860                    input_streams[ost->source_index]->dec->name : "?",
2861                    ost->enc ? ost->enc->name : "?");
2862         av_log(NULL, AV_LOG_INFO, "\n");
2863     }
2864
2865     if (ret) {
2866         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2867         return ret;
2868     }
2869
2870     if (want_sdp) {
2871         print_sdp();
2872     }
2873
2874     return 0;
2875 }
2876
2877 /*
2878  * The following code is the main loop of the file converter
2879  */
2880 static int transcode(void)
2881 {
2882     int ret, i;
2883     AVFormatContext *is, *os;
2884     OutputStream *ost;
2885     InputStream *ist;
2886     uint8_t *no_packet;
2887     int no_packet_count = 0;
2888     int64_t timer_start;
2889
2890     if (!(no_packet = av_mallocz(nb_input_files)))
2891         exit_program(1);
2892
2893     ret = transcode_init();
2894     if (ret < 0)
2895         goto fail;
2896
2897     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2898     term_init();
2899
2900     timer_start = av_gettime();
2901
2902     for (; received_sigterm == 0;) {
2903         int file_index, ist_index, past_recording_time = 1;
2904         AVPacket pkt;
2905         int64_t ipts_min;
2906
2907         ipts_min = INT64_MAX;
2908
2909         /* check if there's any stream where output is still needed */
2910         for (i = 0; i < nb_output_streams; i++) {
2911             OutputFile *of;
2912             ost = output_streams[i];
2913             of  = output_files[ost->file_index];
2914             os  = output_files[ost->file_index]->ctx;
2915             if (ost->is_past_recording_time ||
2916                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2917                 continue;
2918             if (ost->frame_number > ost->max_frames) {
2919                 int j;
2920                 for (j = 0; j < of->ctx->nb_streams; j++)
2921                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
2922                 continue;
2923             }
2924             past_recording_time = 0;
2925         }
2926         if (past_recording_time)
2927             break;
2928
2929         /* select the stream that we must read now by looking at the
2930            smallest output pts */
2931         file_index = -1;
2932         for (i = 0; i < nb_input_streams; i++) {
2933             int64_t ipts;
2934             ist = input_streams[i];
2935             ipts = ist->last_dts;
2936             if (ist->discard || no_packet[ist->file_index])
2937                 continue;
2938             if (!input_files[ist->file_index]->eof_reached) {
2939                 if (ipts < ipts_min) {
2940                     ipts_min = ipts;
2941                     file_index = ist->file_index;
2942                 }
2943             }
2944         }
2945         /* if none, if is finished */
2946         if (file_index < 0) {
2947             if (no_packet_count) {
2948                 no_packet_count = 0;
2949                 memset(no_packet, 0, nb_input_files);
2950                 usleep(10000);
2951                 continue;
2952             }
2953             break;
2954         }
2955
2956         /* read a frame from it and output it in the fifo */
2957         is  = input_files[file_index]->ctx;
2958         ret = av_read_frame(is, &pkt);
2959         if (ret == AVERROR(EAGAIN)) {
2960             no_packet[file_index] = 1;
2961             no_packet_count++;
2962             continue;
2963         }
2964         if (ret < 0) {
2965             input_files[file_index]->eof_reached = 1;
2966
2967             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2968                 ist = input_streams[input_files[file_index]->ist_index + i];
2969                 if (ist->decoding_needed)
2970                     output_packet(ist, NULL);
2971             }
2972
2973             if (opt_shortest)
2974                 break;
2975             else
2976                 continue;
2977         }
2978
2979         no_packet_count = 0;
2980         memset(no_packet, 0, nb_input_files);
2981
2982         if (do_pkt_dump) {
2983             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2984                              is->streams[pkt.stream_index]);
2985         }
2986         /* the following test is needed in case new streams appear
2987            dynamically in stream : we ignore them */
2988         if (pkt.stream_index >= input_files[file_index]->nb_streams)
2989             goto discard_packet;
2990         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
2991         ist = input_streams[ist_index];
2992         if (ist->discard)
2993             goto discard_packet;
2994
2995         if (pkt.dts != AV_NOPTS_VALUE)
2996             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2997         if (pkt.pts != AV_NOPTS_VALUE)
2998             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2999
3000         if (pkt.pts != AV_NOPTS_VALUE)
3001             pkt.pts *= ist->ts_scale;
3002         if (pkt.dts != AV_NOPTS_VALUE)
3003             pkt.dts *= ist->ts_scale;
3004
3005         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
3006         //        ist->next_dts,
3007         //        pkt.dts, input_files[ist->file_index].ts_offset,
3008         //        ist->st->codec->codec_type);
3009         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
3010             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
3011             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
3012             int64_t delta   = pkt_dts - ist->next_dts;
3013             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
3014                 input_files[ist->file_index]->ts_offset -= delta;
3015                 av_log(NULL, AV_LOG_DEBUG,
3016                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
3017                        delta, input_files[ist->file_index]->ts_offset);
3018                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3019                 if (pkt.pts != AV_NOPTS_VALUE)
3020                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3021             }
3022         }
3023
3024         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3025         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3026             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3027                    ist->file_index, ist->st->index);
3028             if (exit_on_error)
3029                 exit_program(1);
3030             av_free_packet(&pkt);
3031             continue;
3032         }
3033
3034     discard_packet:
3035         av_free_packet(&pkt);
3036
3037         /* dump report by using the output first video and audio streams */
3038         print_report(0, timer_start);
3039     }
3040
3041     /* at the end of stream, we must flush the decoder buffers */
3042     for (i = 0; i < nb_input_streams; i++) {
3043         ist = input_streams[i];
3044         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3045             output_packet(ist, NULL);
3046         }
3047     }
3048     poll_filters();
3049     flush_encoders();
3050
3051     term_exit();
3052
3053     /* write the trailer if needed and close file */
3054     for (i = 0; i < nb_output_files; i++) {
3055         os = output_files[i]->ctx;
3056         av_write_trailer(os);
3057     }
3058
3059     /* dump report by using the first video and audio streams */
3060     print_report(1, timer_start);
3061
3062     /* close each encoder */
3063     for (i = 0; i < nb_output_streams; i++) {
3064         ost = output_streams[i];
3065         if (ost->encoding_needed) {
3066             av_freep(&ost->st->codec->stats_in);
3067             avcodec_close(ost->st->codec);
3068         }
3069     }
3070
3071     /* close each decoder */
3072     for (i = 0; i < nb_input_streams; i++) {
3073         ist = input_streams[i];
3074         if (ist->decoding_needed) {
3075             avcodec_close(ist->st->codec);
3076         }
3077     }
3078
3079     /* finished ! */
3080     ret = 0;
3081
3082  fail:
3083     av_freep(&no_packet);
3084
3085     if (output_streams) {
3086         for (i = 0; i < nb_output_streams; i++) {
3087             ost = output_streams[i];
3088             if (ost) {
3089                 if (ost->stream_copy)
3090                     av_freep(&ost->st->codec->extradata);
3091                 if (ost->logfile) {
3092                     fclose(ost->logfile);
3093                     ost->logfile = NULL;
3094                 }
3095                 av_freep(&ost->st->codec->subtitle_header);
3096                 av_free(ost->forced_kf_pts);
3097                 av_dict_free(&ost->opts);
3098             }
3099         }
3100     }
3101     return ret;
3102 }
3103
3104 static double parse_frame_aspect_ratio(const char *arg)
3105 {
3106     int x = 0, y = 0;
3107     double ar = 0;
3108     const char *p;
3109     char *end;
3110
3111     p = strchr(arg, ':');
3112     if (p) {
3113         x = strtol(arg, &end, 10);
3114         if (end == p)
3115             y = strtol(end + 1, &end, 10);
3116         if (x > 0 && y > 0)
3117             ar = (double)x / (double)y;
3118     } else
3119         ar = strtod(arg, NULL);
3120
3121     if (!ar) {
3122         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3123         exit_program(1);
3124     }
3125     return ar;
3126 }
3127
3128 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3129 {
3130     return parse_option(o, "codec:a", arg, options);
3131 }
3132
3133 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3134 {
3135     return parse_option(o, "codec:v", arg, options);
3136 }
3137
3138 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3139 {
3140     return parse_option(o, "codec:s", arg, options);
3141 }
3142
3143 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3144 {
3145     return parse_option(o, "codec:d", arg, options);
3146 }
3147
3148 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3149 {
3150     StreamMap *m = NULL;
3151     int i, negative = 0, file_idx;
3152     int sync_file_idx = -1, sync_stream_idx;
3153     char *p, *sync;
3154     char *map;
3155
3156     if (*arg == '-') {
3157         negative = 1;
3158         arg++;
3159     }
3160     map = av_strdup(arg);
3161
3162     /* parse sync stream first, just pick first matching stream */
3163     if (sync = strchr(map, ',')) {
3164         *sync = 0;
3165         sync_file_idx = strtol(sync + 1, &sync, 0);
3166         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3167             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3168             exit_program(1);
3169         }
3170         if (*sync)
3171             sync++;
3172         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3173             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3174                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3175                 sync_stream_idx = i;
3176                 break;
3177             }
3178         if (i == input_files[sync_file_idx]->nb_streams) {
3179             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3180                                        "match any streams.\n", arg);
3181             exit_program(1);
3182         }
3183     }
3184
3185
3186     if (map[0] == '[') {
3187         /* this mapping refers to lavfi output */
3188         const char *c = map + 1;
3189         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3190                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3191         m = &o->stream_maps[o->nb_stream_maps - 1];
3192         m->linklabel = av_get_token(&c, "]");
3193         if (!m->linklabel) {
3194             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3195             exit_program(1);
3196         }
3197     } else {
3198         file_idx = strtol(map, &p, 0);
3199         if (file_idx >= nb_input_files || file_idx < 0) {
3200             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3201             exit_program(1);
3202         }
3203         if (negative)
3204             /* disable some already defined maps */
3205             for (i = 0; i < o->nb_stream_maps; i++) {
3206                 m = &o->stream_maps[i];
3207                 if (file_idx == m->file_index &&
3208                     check_stream_specifier(input_files[m->file_index]->ctx,
3209                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3210                                            *p == ':' ? p + 1 : p) > 0)
3211                     m->disabled = 1;
3212             }
3213         else
3214             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3215                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3216                             *p == ':' ? p + 1 : p) <= 0)
3217                     continue;
3218                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3219                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3220                 m = &o->stream_maps[o->nb_stream_maps - 1];
3221
3222                 m->file_index   = file_idx;
3223                 m->stream_index = i;
3224
3225                 if (sync_file_idx >= 0) {
3226                     m->sync_file_index   = sync_file_idx;
3227                     m->sync_stream_index = sync_stream_idx;
3228                 } else {
3229                     m->sync_file_index   = file_idx;
3230                     m->sync_stream_index = i;
3231                 }
3232             }
3233     }
3234
3235     if (!m) {
3236         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3237         exit_program(1);
3238     }
3239
3240     av_freep(&map);
3241     return 0;
3242 }
3243
3244 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3245 {
3246     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3247                                 &o->nb_attachments, o->nb_attachments + 1);
3248     o->attachments[o->nb_attachments - 1] = arg;
3249     return 0;
3250 }
3251
3252 /**
3253  * Parse a metadata specifier in arg.
3254  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3255  * @param index for type c/p, chapter/program index is written here
3256  * @param stream_spec for type s, the stream specifier is written here
3257  */
3258 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3259 {
3260     if (*arg) {
3261         *type = *arg;
3262         switch (*arg) {
3263         case 'g':
3264             break;
3265         case 's':
3266             if (*(++arg) && *arg != ':') {
3267                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3268                 exit_program(1);
3269             }
3270             *stream_spec = *arg == ':' ? arg + 1 : "";
3271             break;
3272         case 'c':
3273         case 'p':
3274             if (*(++arg) == ':')
3275                 *index = strtol(++arg, NULL, 0);
3276             break;
3277         default:
3278             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3279             exit_program(1);
3280         }
3281     } else
3282         *type = 'g';
3283 }
3284
3285 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3286 {
3287     AVDictionary **meta_in = NULL;
3288     AVDictionary **meta_out;
3289     int i, ret = 0;
3290     char type_in, type_out;
3291     const char *istream_spec = NULL, *ostream_spec = NULL;
3292     int idx_in = 0, idx_out = 0;
3293
3294     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3295     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3296
3297     if (type_in == 'g' || type_out == 'g')
3298         o->metadata_global_manual = 1;
3299     if (type_in == 's' || type_out == 's')
3300         o->metadata_streams_manual = 1;
3301     if (type_in == 'c' || type_out == 'c')
3302         o->metadata_chapters_manual = 1;
3303
3304 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3305     if ((index) < 0 || (index) >= (nb_elems)) {\
3306         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3307                 (desc), (index));\
3308         exit_program(1);\
3309     }
3310
3311 #define SET_DICT(type, meta, context, index)\
3312         switch (type) {\
3313         case 'g':\
3314             meta = &context->metadata;\
3315             break;\
3316         case 'c':\
3317             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3318             meta = &context->chapters[index]->metadata;\
3319             break;\
3320         case 'p':\
3321             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3322             meta = &context->programs[index]->metadata;\
3323             break;\
3324         }\
3325
3326     SET_DICT(type_in, meta_in, ic, idx_in);
3327     SET_DICT(type_out, meta_out, oc, idx_out);
3328
3329     /* for input streams choose first matching stream */
3330     if (type_in == 's') {
3331         for (i = 0; i < ic->nb_streams; i++) {
3332             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3333                 meta_in = &ic->streams[i]->metadata;
3334                 break;
3335             } else if (ret < 0)
3336                 exit_program(1);
3337         }
3338         if (!meta_in) {
3339             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3340             exit_program(1);
3341         }
3342     }
3343
3344     if (type_out == 's') {
3345         for (i = 0; i < oc->nb_streams; i++) {
3346             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3347                 meta_out = &oc->streams[i]->metadata;
3348                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3349             } else if (ret < 0)
3350                 exit_program(1);
3351         }
3352     } else
3353         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3354
3355     return 0;
3356 }
3357
3358 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3359 {
3360     const char *codec_string = encoder ? "encoder" : "decoder";
3361     AVCodec *codec;
3362
3363     codec = encoder ?
3364         avcodec_find_encoder_by_name(name) :
3365         avcodec_find_decoder_by_name(name);
3366     if (!codec) {
3367         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3368         exit_program(1);
3369     }
3370     if (codec->type != type) {
3371         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3372         exit_program(1);
3373     }
3374     return codec;
3375 }
3376
3377 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3378 {
3379     char *codec_name = NULL;
3380
3381     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3382     if (codec_name) {
3383         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3384         st->codec->codec_id = codec->id;
3385         return codec;
3386     } else
3387         return avcodec_find_decoder(st->codec->codec_id);
3388 }
3389
3390 /**
3391  * Add all the streams from the given input file to the global
3392  * list of input streams.
3393  */
3394 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3395 {
3396     int i;
3397
3398     for (i = 0; i < ic->nb_streams; i++) {
3399         AVStream *st = ic->streams[i];
3400         AVCodecContext *dec = st->codec;
3401         InputStream *ist = av_mallocz(sizeof(*ist));
3402
3403         if (!ist)
3404             exit_program(1);
3405
3406         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3407         input_streams[nb_input_streams - 1] = ist;
3408
3409         ist->st = st;
3410         ist->file_index = nb_input_files;
3411         ist->discard = 1;
3412         st->discard  = AVDISCARD_ALL;
3413         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
3414
3415         ist->ts_scale = 1.0;
3416         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3417
3418         ist->dec = choose_decoder(o, ic, st);
3419
3420         switch (dec->codec_type) {
3421         case AVMEDIA_TYPE_VIDEO:
3422             ist->resample_height  = dec->height;
3423             ist->resample_width   = dec->width;
3424             ist->resample_pix_fmt = dec->pix_fmt;
3425
3426             break;
3427         case AVMEDIA_TYPE_AUDIO:
3428             guess_input_channel_layout(ist);
3429
3430             ist->resample_sample_fmt     = dec->sample_fmt;
3431             ist->resample_sample_rate    = dec->sample_rate;
3432             ist->resample_channels       = dec->channels;
3433             ist->resample_channel_layout = dec->channel_layout;
3434
3435             break;
3436         case AVMEDIA_TYPE_DATA:
3437         case AVMEDIA_TYPE_SUBTITLE:
3438         case AVMEDIA_TYPE_ATTACHMENT:
3439         case AVMEDIA_TYPE_UNKNOWN:
3440             break;
3441         default:
3442             abort();
3443         }
3444     }
3445 }
3446
3447 static void assert_file_overwrite(const char *filename)
3448 {
3449     if (!file_overwrite &&
3450         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3451          av_strstart(filename, "file:", NULL))) {
3452         if (avio_check(filename, 0) == 0) {
3453             if (!using_stdin) {
3454                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3455                 fflush(stderr);
3456                 if (!read_yesno()) {
3457                     fprintf(stderr, "Not overwriting - exiting\n");
3458                     exit_program(1);
3459                 }
3460             }
3461             else {
3462                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3463                 exit_program(1);
3464             }
3465         }
3466     }
3467 }
3468
3469 static void dump_attachment(AVStream *st, const char *filename)
3470 {
3471     int ret;
3472     AVIOContext *out = NULL;
3473     AVDictionaryEntry *e;
3474
3475     if (!st->codec->extradata_size) {
3476         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3477                nb_input_files - 1, st->index);
3478         return;
3479     }
3480     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3481         filename = e->value;
3482     if (!*filename) {
3483         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3484                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3485         exit_program(1);
3486     }
3487
3488     assert_file_overwrite(filename);
3489
3490     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3491         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3492                filename);
3493         exit_program(1);
3494     }
3495
3496     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3497     avio_flush(out);
3498     avio_close(out);
3499 }
3500
3501 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3502 {
3503     AVFormatContext *ic;
3504     AVInputFormat *file_iformat = NULL;
3505     int err, i, ret;
3506     int64_t timestamp;
3507     uint8_t buf[128];
3508     AVDictionary **opts;
3509     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3510
3511     if (o->format) {
3512         if (!(file_iformat = av_find_input_format(o->format))) {
3513             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3514             exit_program(1);
3515         }
3516     }
3517
3518     if (!strcmp(filename, "-"))
3519         filename = "pipe:";
3520
3521     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3522                     !strcmp(filename, "/dev/stdin");
3523
3524     /* get default parameters from command line */
3525     ic = avformat_alloc_context();
3526     if (!ic) {
3527         print_error(filename, AVERROR(ENOMEM));
3528         exit_program(1);
3529     }
3530     if (o->nb_audio_sample_rate) {
3531         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3532         av_dict_set(&format_opts, "sample_rate", buf, 0);
3533     }
3534     if (o->nb_audio_channels) {
3535         /* because we set audio_channels based on both the "ac" and
3536          * "channel_layout" options, we need to check that the specified
3537          * demuxer actually has the "channels" option before setting it */
3538         if (file_iformat && file_iformat->priv_class &&
3539             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3540                         AV_OPT_SEARCH_FAKE_OBJ)) {
3541             snprintf(buf, sizeof(buf), "%d",
3542                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3543             av_dict_set(&format_opts, "channels", buf, 0);
3544         }
3545     }
3546     if (o->nb_frame_rates) {
3547         av_dict_set(&format_opts, "framerate", o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3548     }
3549     if (o->nb_frame_sizes) {
3550         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3551     }
3552     if (o->nb_frame_pix_fmts)
3553         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3554
3555     ic->flags |= AVFMT_FLAG_NONBLOCK;
3556     ic->interrupt_callback = int_cb;
3557
3558     /* open the input file with generic libav function */
3559     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3560     if (err < 0) {
3561         print_error(filename, err);
3562         exit_program(1);
3563     }
3564     assert_avoptions(format_opts);
3565
3566     /* apply forced codec ids */
3567     for (i = 0; i < ic->nb_streams; i++)
3568         choose_decoder(o, ic, ic->streams[i]);
3569
3570     /* Set AVCodecContext options for avformat_find_stream_info */
3571     opts = setup_find_stream_info_opts(ic, codec_opts);
3572     orig_nb_streams = ic->nb_streams;
3573
3574     /* If not enough info to get the stream parameters, we decode the
3575        first frames to get it. (used in mpeg case for example) */
3576     ret = avformat_find_stream_info(ic, opts);
3577     if (ret < 0) {
3578         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3579         avformat_close_input(&ic);
3580         exit_program(1);
3581     }
3582
3583     timestamp = o->start_time;
3584     /* add the stream start time */
3585     if (ic->start_time != AV_NOPTS_VALUE)
3586         timestamp += ic->start_time;
3587
3588     /* if seeking requested, we execute it */
3589     if (o->start_time != 0) {
3590         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3591         if (ret < 0) {
3592             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3593                    filename, (double)timestamp / AV_TIME_BASE);
3594         }
3595     }
3596
3597     /* update the current parameters so that they match the one of the input stream */
3598     add_input_streams(o, ic);
3599
3600     /* dump the file content */
3601     av_dump_format(ic, nb_input_files, filename, 0);
3602
3603     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3604     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3605         exit_program(1);
3606
3607     input_files[nb_input_files - 1]->ctx        = ic;
3608     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3609     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3610     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3611     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3612
3613     for (i = 0; i < o->nb_dump_attachment; i++) {
3614         int j;
3615
3616         for (j = 0; j < ic->nb_streams; j++) {
3617             AVStream *st = ic->streams[j];
3618
3619             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3620                 dump_attachment(st, o->dump_attachment[i].u.str);
3621         }
3622     }
3623
3624     for (i = 0; i < orig_nb_streams; i++)
3625         av_dict_free(&opts[i]);
3626     av_freep(&opts);
3627
3628     reset_options(o);
3629     return 0;
3630 }
3631
3632 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3633                                     AVCodecContext *avctx)
3634 {
3635     char *p;
3636     int n = 1, i;
3637     int64_t t;
3638
3639     for (p = kf; *p; p++)
3640         if (*p == ',')
3641             n++;
3642     ost->forced_kf_count = n;
3643     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3644     if (!ost->forced_kf_pts) {
3645         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3646         exit_program(1);
3647     }
3648     for (i = 0; i < n; i++) {
3649         p = i ? strchr(p, ',') + 1 : kf;
3650         t = parse_time_or_die("force_key_frames", p, 1);
3651         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3652     }
3653 }
3654
3655 static uint8_t *get_line(AVIOContext *s)
3656 {
3657     AVIOContext *line;
3658     uint8_t *buf;
3659     char c;
3660
3661     if (avio_open_dyn_buf(&line) < 0) {
3662         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3663         exit_program(1);
3664     }
3665
3666     while ((c = avio_r8(s)) && c != '\n')
3667         avio_w8(line, c);
3668     avio_w8(line, 0);
3669     avio_close_dyn_buf(line, &buf);
3670
3671     return buf;
3672 }
3673
3674 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3675 {
3676     int i, ret = 1;
3677     char filename[1000];
3678     const char *base[3] = { getenv("AVCONV_DATADIR"),
3679                             getenv("HOME"),
3680                             AVCONV_DATADIR,
3681                             };
3682
3683     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3684         if (!base[i])
3685             continue;
3686         if (codec_name) {
3687             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3688                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3689             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3690         }
3691         if (ret) {
3692             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3693                      i != 1 ? "" : "/.avconv", preset_name);