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[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     uint8_t            *name;
150 } InputFilter;
151
152 typedef struct OutputFilter {
153     AVFilterContext     *filter;
154     struct OutputStream *ost;
155     struct FilterGraph  *graph;
156     uint8_t             *name;
157
158     /* temporary storage until stream maps are processed */
159     AVFilterInOut       *out_tmp;
160 } OutputFilter;
161
162 typedef struct FilterGraph {
163     int            index;
164     const char    *graph_desc;
165
166     AVFilterGraph *graph;
167
168     InputFilter   **inputs;
169     int          nb_inputs;
170     OutputFilter **outputs;
171     int         nb_outputs;
172 } FilterGraph;
173
174 typedef struct FrameBuffer {
175     uint8_t *base[4];
176     uint8_t *data[4];
177     int  linesize[4];
178
179     int h, w;
180     enum PixelFormat pix_fmt;
181
182     int refcount;
183     struct InputStream *ist;
184     struct FrameBuffer *next;
185 } FrameBuffer;
186
187 typedef struct InputStream {
188     int file_index;
189     AVStream *st;
190     int discard;             /* true if stream data should be discarded */
191     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
192     AVCodec *dec;
193     AVFrame *decoded_frame;
194
195     int64_t       start;     /* time when read started */
196     /* predicted dts of the next packet read for this stream or (when there are
197      * several frames in a packet) of the next frame in current packet */
198     int64_t       next_dts;
199     /* dts of the last packet read for this stream */
200     int64_t       last_dts;
201     PtsCorrectionContext pts_ctx;
202     double ts_scale;
203     int is_start;            /* is 1 at the start and after a discontinuity */
204     int showed_multi_packet_warning;
205     AVDictionary *opts;
206     AVRational framerate;               /* framerate forced with -r */
207
208     int resample_height;
209     int resample_width;
210     int resample_pix_fmt;
211
212     int      resample_sample_fmt;
213     int      resample_sample_rate;
214     int      resample_channels;
215     uint64_t resample_channel_layout;
216
217     /* a pool of free buffers for decoded data */
218     FrameBuffer *buffer_pool;
219
220     /* decoded data from this stream goes into all those filters
221      * currently video and audio only */
222     InputFilter **filters;
223     int        nb_filters;
224 } InputStream;
225
226 typedef struct InputFile {
227     AVFormatContext *ctx;
228     int eof_reached;      /* true if eof reached */
229     int ist_index;        /* index of first stream in ist_table */
230     int buffer_size;      /* current total buffer size */
231     int64_t ts_offset;
232     int nb_streams;       /* number of stream that avconv is aware of; may be different
233                              from ctx.nb_streams if new streams appear during av_read_frame() */
234     int rate_emu;
235 } InputFile;
236
237 typedef struct OutputStream {
238     int file_index;          /* file index */
239     int index;               /* stream index in the output file */
240     int source_index;        /* InputStream index */
241     AVStream *st;            /* stream in the output file */
242     int encoding_needed;     /* true if encoding needed for this stream */
243     int frame_number;
244     /* input pts and corresponding output pts
245        for A/V sync */
246     // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
247     struct InputStream *sync_ist; /* input stream to sync against */
248     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
249     /* pts of the first frame encoded for this stream, used for limiting
250      * recording time */
251     int64_t first_pts;
252     AVBitStreamFilterContext *bitstream_filters;
253     AVCodec *enc;
254     int64_t max_frames;
255     AVFrame *filtered_frame;
256
257     /* video only */
258     AVRational frame_rate;
259     int force_fps;
260     int top_field_first;
261
262     float frame_aspect_ratio;
263     float last_quality;
264
265     /* forced key frames */
266     int64_t *forced_kf_pts;
267     int forced_kf_count;
268     int forced_kf_index;
269
270     FILE *logfile;
271
272     OutputFilter *filter;
273     char *avfilter;
274
275     int64_t sws_flags;
276     AVDictionary *opts;
277     int is_past_recording_time;
278     int stream_copy;
279     const char *attachment_filename;
280     int copy_initial_nonkeyframes;
281
282     enum PixelFormat pix_fmts[2];
283 } OutputStream;
284
285
286 typedef struct OutputFile {
287     AVFormatContext *ctx;
288     AVDictionary *opts;
289     int ost_index;       /* index of the first stream in output_streams */
290     int64_t recording_time; /* desired length of the resulting file in microseconds */
291     int64_t start_time;     /* start time in microseconds */
292     uint64_t limit_filesize;
293 } OutputFile;
294
295 static InputStream **input_streams = NULL;
296 static int        nb_input_streams = 0;
297 static InputFile   **input_files   = NULL;
298 static int        nb_input_files   = 0;
299
300 static OutputStream **output_streams = NULL;
301 static int         nb_output_streams = 0;
302 static OutputFile   **output_files   = NULL;
303 static int         nb_output_files   = 0;
304
305 static FilterGraph **filtergraphs;
306 int               nb_filtergraphs;
307
308 typedef struct OptionsContext {
309     /* input/output options */
310     int64_t start_time;
311     const char *format;
312
313     SpecifierOpt *codec_names;
314     int        nb_codec_names;
315     SpecifierOpt *audio_channels;
316     int        nb_audio_channels;
317     SpecifierOpt *audio_sample_rate;
318     int        nb_audio_sample_rate;
319     SpecifierOpt *frame_rates;
320     int        nb_frame_rates;
321     SpecifierOpt *frame_sizes;
322     int        nb_frame_sizes;
323     SpecifierOpt *frame_pix_fmts;
324     int        nb_frame_pix_fmts;
325
326     /* input options */
327     int64_t input_ts_offset;
328     int rate_emu;
329
330     SpecifierOpt *ts_scale;
331     int        nb_ts_scale;
332     SpecifierOpt *dump_attachment;
333     int        nb_dump_attachment;
334
335     /* output options */
336     StreamMap *stream_maps;
337     int     nb_stream_maps;
338     /* first item specifies output metadata, second is input */
339     MetadataMap (*meta_data_maps)[2];
340     int nb_meta_data_maps;
341     int metadata_global_manual;
342     int metadata_streams_manual;
343     int metadata_chapters_manual;
344     const char **attachments;
345     int       nb_attachments;
346
347     int chapters_input_file;
348
349     int64_t recording_time;
350     uint64_t limit_filesize;
351     float mux_preload;
352     float mux_max_delay;
353
354     int video_disable;
355     int audio_disable;
356     int subtitle_disable;
357     int data_disable;
358
359     /* indexed by output file stream index */
360     int   *streamid_map;
361     int nb_streamid_map;
362
363     SpecifierOpt *metadata;
364     int        nb_metadata;
365     SpecifierOpt *max_frames;
366     int        nb_max_frames;
367     SpecifierOpt *bitstream_filters;
368     int        nb_bitstream_filters;
369     SpecifierOpt *codec_tags;
370     int        nb_codec_tags;
371     SpecifierOpt *sample_fmts;
372     int        nb_sample_fmts;
373     SpecifierOpt *qscale;
374     int        nb_qscale;
375     SpecifierOpt *forced_key_frames;
376     int        nb_forced_key_frames;
377     SpecifierOpt *force_fps;
378     int        nb_force_fps;
379     SpecifierOpt *frame_aspect_ratios;
380     int        nb_frame_aspect_ratios;
381     SpecifierOpt *rc_overrides;
382     int        nb_rc_overrides;
383     SpecifierOpt *intra_matrices;
384     int        nb_intra_matrices;
385     SpecifierOpt *inter_matrices;
386     int        nb_inter_matrices;
387     SpecifierOpt *top_field_first;
388     int        nb_top_field_first;
389     SpecifierOpt *metadata_map;
390     int        nb_metadata_map;
391     SpecifierOpt *presets;
392     int        nb_presets;
393     SpecifierOpt *copy_initial_nonkeyframes;
394     int        nb_copy_initial_nonkeyframes;
395     SpecifierOpt *filters;
396     int        nb_filters;
397 } OptionsContext;
398
399 #define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
400 {\
401     int i, ret;\
402     for (i = 0; i < o->nb_ ## name; i++) {\
403         char *spec = o->name[i].specifier;\
404         if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
405             outvar = o->name[i].u.type;\
406         else if (ret < 0)\
407             exit_program(1);\
408     }\
409 }
410
411 static void reset_options(OptionsContext *o)
412 {
413     const OptionDef *po = options;
414     int i;
415
416     /* all OPT_SPEC and OPT_STRING can be freed in generic way */
417     while (po->name) {
418         void *dst = (uint8_t*)o + po->u.off;
419
420         if (po->flags & OPT_SPEC) {
421             SpecifierOpt **so = dst;
422             int i, *count = (int*)(so + 1);
423             for (i = 0; i < *count; i++) {
424                 av_freep(&(*so)[i].specifier);
425                 if (po->flags & OPT_STRING)
426                     av_freep(&(*so)[i].u.str);
427             }
428             av_freep(so);
429             *count = 0;
430         } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
431             av_freep(dst);
432         po++;
433     }
434
435     for (i = 0; i < o->nb_stream_maps; i++)
436         av_freep(&o->stream_maps[i].linklabel);
437     av_freep(&o->stream_maps);
438     av_freep(&o->meta_data_maps);
439     av_freep(&o->streamid_map);
440
441     memset(o, 0, sizeof(*o));
442
443     o->mux_max_delay  = 0.7;
444     o->recording_time = INT64_MAX;
445     o->limit_filesize = UINT64_MAX;
446     o->chapters_input_file = INT_MAX;
447
448     uninit_opts();
449     init_opts();
450 }
451
452 static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
453 {
454     FrameBuffer  *buf = av_mallocz(sizeof(*buf));
455     int i, ret;
456     const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
457     int h_chroma_shift, v_chroma_shift;
458     int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
459     int w = s->width, h = s->height;
460
461     if (!buf)
462         return AVERROR(ENOMEM);
463
464     if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
465         w += 2*edge;
466         h += 2*edge;
467     }
468
469     avcodec_align_dimensions(s, &w, &h);
470     if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
471                               s->pix_fmt, 32)) < 0) {
472         av_freep(&buf);
473         return ret;
474     }
475     /* XXX this shouldn't be needed, but some tests break without this line
476      * those decoders are buggy and need to be fixed.
477      * the following tests fail:
478      * cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
479      */
480     memset(buf->base[0], 128, ret);
481
482     avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
483     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
484         const int h_shift = i==0 ? 0 : h_chroma_shift;
485         const int v_shift = i==0 ? 0 : v_chroma_shift;
486         if (s->flags & CODEC_FLAG_EMU_EDGE)
487             buf->data[i] = buf->base[i];
488         else
489             buf->data[i] = buf->base[i] +
490                            FFALIGN((buf->linesize[i]*edge >> v_shift) +
491                                    (pixel_size*edge >> h_shift), 32);
492     }
493     buf->w       = s->width;
494     buf->h       = s->height;
495     buf->pix_fmt = s->pix_fmt;
496     buf->ist     = ist;
497
498     *pbuf = buf;
499     return 0;
500 }
501
502 static void free_buffer_pool(InputStream *ist)
503 {
504     FrameBuffer *buf = ist->buffer_pool;
505     while (buf) {
506         ist->buffer_pool = buf->next;
507         av_freep(&buf->base[0]);
508         av_free(buf);
509         buf = ist->buffer_pool;
510     }
511 }
512
513 static void unref_buffer(InputStream *ist, FrameBuffer *buf)
514 {
515     av_assert0(buf->refcount);
516     buf->refcount--;
517     if (!buf->refcount) {
518         buf->next = ist->buffer_pool;
519         ist->buffer_pool = buf;
520     }
521 }
522
523 static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
524 {
525     InputStream *ist = s->opaque;
526     FrameBuffer *buf;
527     int ret, i;
528
529     if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
530         return ret;
531
532     buf              = ist->buffer_pool;
533     ist->buffer_pool = buf->next;
534     buf->next        = NULL;
535     if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
536         av_freep(&buf->base[0]);
537         av_free(buf);
538         if ((ret = alloc_buffer(ist, s, &buf)) < 0)
539             return ret;
540     }
541     buf->refcount++;
542
543     frame->opaque        = buf;
544     frame->type          = FF_BUFFER_TYPE_USER;
545     frame->extended_data = frame->data;
546     frame->pkt_pts       = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
547     frame->width         = buf->w;
548     frame->height        = buf->h;
549     frame->format        = buf->pix_fmt;
550     frame->sample_aspect_ratio = s->sample_aspect_ratio;
551
552     for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
553         frame->base[i]     = buf->base[i];  // XXX h264.c uses base though it shouldn't
554         frame->data[i]     = buf->data[i];
555         frame->linesize[i] = buf->linesize[i];
556     }
557
558     return 0;
559 }
560
561 static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
562 {
563     InputStream *ist = s->opaque;
564     FrameBuffer *buf = frame->opaque;
565     int i;
566
567     for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
568         frame->data[i] = NULL;
569
570     unref_buffer(ist, buf);
571 }
572
573 static void filter_release_buffer(AVFilterBuffer *fb)
574 {
575     FrameBuffer *buf = fb->priv;
576     av_free(fb);
577     unref_buffer(buf->ist, buf);
578 }
579
580 /**
581  * Define a function for building a string containing a list of
582  * allowed formats,
583  */
584 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
585 static char *choose_ ## var ## s(OutputStream *ost)                             \
586 {                                                                               \
587     if (ost->st->codec->var != none) {                                          \
588         get_name(ost->st->codec->var);                                          \
589         return av_strdup(name);                                                 \
590     } else if (ost->enc->supported_list) {                                      \
591         const type *p;                                                          \
592         AVIOContext *s = NULL;                                                  \
593         uint8_t *ret;                                                           \
594         int len;                                                                \
595                                                                                 \
596         if (avio_open_dyn_buf(&s) < 0)                                          \
597             exit_program(1);                                                    \
598                                                                                 \
599         for (p = ost->enc->supported_list; *p != none; p++) {                   \
600             get_name(*p);                                                       \
601             avio_printf(s, "%s" separator, name);                               \
602         }                                                                       \
603         len = avio_close_dyn_buf(s, &ret);                                      \
604         ret[len - 1] = 0;                                                       \
605         return ret;                                                             \
606     } else                                                                      \
607         return NULL;                                                            \
608 }
609
610 #define GET_PIX_FMT_NAME(pix_fmt)\
611     const char *name = av_get_pix_fmt_name(pix_fmt);
612
613 DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
614                   GET_PIX_FMT_NAME, ":")
615
616 #define GET_SAMPLE_FMT_NAME(sample_fmt)\
617     const char *name = av_get_sample_fmt_name(sample_fmt)
618
619 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
620                   AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
621
622 #define GET_SAMPLE_RATE_NAME(rate)\
623     char name[16];\
624     snprintf(name, sizeof(name), "%d", rate);
625
626 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
627                   GET_SAMPLE_RATE_NAME, ",")
628
629 #define GET_CH_LAYOUT_NAME(ch_layout)\
630     char name[16];\
631     snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
632
633 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
634                   GET_CH_LAYOUT_NAME, ",")
635
636 static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
637 {
638     FilterGraph *fg = av_mallocz(sizeof(*fg));
639
640     if (!fg)
641         exit_program(1);
642     fg->index = nb_filtergraphs;
643
644     fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
645                              fg->nb_outputs + 1);
646     if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
647         exit_program(1);
648     fg->outputs[0]->ost   = ost;
649     fg->outputs[0]->graph = fg;
650
651     ost->filter = fg->outputs[0];
652
653     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
654                             fg->nb_inputs + 1);
655     if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
656         exit_program(1);
657     fg->inputs[0]->ist   = ist;
658     fg->inputs[0]->graph = fg;
659
660     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
661                               &ist->nb_filters, ist->nb_filters + 1);
662     ist->filters[ist->nb_filters - 1] = fg->inputs[0];
663
664     filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
665                               &nb_filtergraphs, nb_filtergraphs + 1);
666     filtergraphs[nb_filtergraphs - 1] = fg;
667
668     return fg;
669 }
670
671 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
672 {
673     InputStream *ist;
674     enum AVMediaType type = in->filter_ctx->input_pads[in->pad_idx].type;
675     int i;
676
677     // TODO: support other filter types
678     if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
679         av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
680                "currently.\n");
681         exit_program(1);
682     }
683
684     if (in->name) {
685         AVFormatContext *s;
686         AVStream       *st = NULL;
687         char *p;
688         int file_idx = strtol(in->name, &p, 0);
689
690         if (file_idx < 0 || file_idx >= nb_input_files) {
691             av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
692                    file_idx, fg->graph_desc);
693             exit_program(1);
694         }
695         s = input_files[file_idx]->ctx;
696
697         for (i = 0; i < s->nb_streams; i++) {
698             if (s->streams[i]->codec->codec_type != type)
699                 continue;
700             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
701                 st = s->streams[i];
702                 break;
703             }
704         }
705         if (!st) {
706             av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
707                    "matches no streams.\n", p, fg->graph_desc);
708             exit_program(1);
709         }
710         ist = input_streams[input_files[file_idx]->ist_index + st->index];
711     } else {
712         /* find the first unused stream of corresponding type */
713         for (i = 0; i < nb_input_streams; i++) {
714             ist = input_streams[i];
715             if (ist->st->codec->codec_type == type && ist->discard)
716                 break;
717         }
718         if (i == nb_input_streams) {
719             av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
720                    "unlabeled input pad %d on filter %s", in->pad_idx,
721                    in->filter_ctx->name);
722             exit_program(1);
723         }
724     }
725     ist->discard         = 0;
726     ist->decoding_needed = 1;
727     ist->st->discard = AVDISCARD_NONE;
728
729     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
730                             &fg->nb_inputs, fg->nb_inputs + 1);
731     if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
732         exit_program(1);
733     fg->inputs[fg->nb_inputs - 1]->ist   = ist;
734     fg->inputs[fg->nb_inputs - 1]->graph = fg;
735
736     ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
737                               &ist->nb_filters, ist->nb_filters + 1);
738     ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
739 }
740
741 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
742 {
743     char *pix_fmts;
744     OutputStream *ost = ofilter->ost;
745     AVCodecContext *codec = ost->st->codec;
746     AVFilterContext *last_filter = out->filter_ctx;
747     int pad_idx = out->pad_idx;
748     int ret;
749
750
751     ret = avfilter_graph_create_filter(&ofilter->filter,
752                                        avfilter_get_by_name("buffersink"),
753                                        "out", NULL, pix_fmts, fg->graph);
754     if (ret < 0)
755         return ret;
756
757     if (codec->width || codec->height) {
758         char args[255];
759         AVFilterContext *filter;
760
761         snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
762                  codec->width,
763                  codec->height,
764                  (unsigned)ost->sws_flags);
765         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
766                                                 NULL, args, NULL, fg->graph)) < 0)
767             return ret;
768         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
769             return ret;
770
771         last_filter = filter;
772         pad_idx = 0;
773     }
774
775     if ((pix_fmts = choose_pix_fmts(ost))) {
776         AVFilterContext *filter;
777         if ((ret = avfilter_graph_create_filter(&filter,
778                                                 avfilter_get_by_name("format"),
779                                                 "format", pix_fmts, NULL,
780                                                 fg->graph)) < 0)
781             return ret;
782         if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
783             return ret;
784
785         last_filter = filter;
786         pad_idx     = 0;
787         av_freep(&pix_fmts);
788     }
789
790     if (ost->frame_rate.num) {
791         AVFilterContext *fps;
792         char args[255];
793
794         snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
795                  ost->frame_rate.den);
796         ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
797                                            "fps", args, NULL, fg->graph);
798         if (ret < 0)
799             return ret;
800
801         ret = avfilter_link(last_filter, pad_idx, fps, 0);
802         if (ret < 0)
803             return ret;
804         last_filter = fps;
805         pad_idx = 0;
806     }
807
808     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
809         return ret;
810
811     return 0;
812 }
813
814 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
815 {
816     OutputStream *ost = ofilter->ost;
817     AVCodecContext *codec  = ost->st->codec;
818     AVFilterContext *last_filter = out->filter_ctx;
819     int pad_idx = out->pad_idx;
820     char *sample_fmts, *sample_rates, *channel_layouts;
821     int ret;
822
823     ret = avfilter_graph_create_filter(&ofilter->filter,
824                                        avfilter_get_by_name("abuffersink"),
825                                        "out", NULL, NULL, fg->graph);
826     if (ret < 0)
827         return ret;
828
829     if (codec->channels && !codec->channel_layout)
830         codec->channel_layout = av_get_default_channel_layout(codec->channels);
831
832     sample_fmts     = choose_sample_fmts(ost);
833     sample_rates    = choose_sample_rates(ost);
834     channel_layouts = choose_channel_layouts(ost);
835     if (sample_fmts || sample_rates || channel_layouts) {
836         AVFilterContext *format;
837         char args[256];
838         int len = 0;
839
840         if (sample_fmts)
841             len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
842                             sample_fmts);
843         if (sample_rates)
844             len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
845                             sample_rates);
846         if (channel_layouts)
847             len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
848                             channel_layouts);
849         args[len - 1] = 0;
850
851         av_freep(&sample_fmts);
852         av_freep(&sample_rates);
853         av_freep(&channel_layouts);
854
855         ret = avfilter_graph_create_filter(&format,
856                                            avfilter_get_by_name("aformat"),
857                                            "aformat", args, NULL, fg->graph);
858         if (ret < 0)
859             return ret;
860
861         ret = avfilter_link(last_filter, pad_idx, format, 0);
862         if (ret < 0)
863             return ret;
864
865         last_filter = format;
866         pad_idx = 0;
867     }
868
869     if (audio_sync_method > 0) {
870         AVFilterContext *async;
871         char args[256];
872         int  len = 0;
873
874         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
875                "asyncts audio filter instead.\n");
876
877         if (audio_sync_method > 1)
878             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
879                             "max_comp=%d:", audio_sync_method);
880         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
881                  audio_drift_threshold);
882
883         ret = avfilter_graph_create_filter(&async,
884                                            avfilter_get_by_name("asyncts"),
885                                            "async", args, NULL, fg->graph);
886         if (ret < 0)
887             return ret;
888
889         ret = avfilter_link(last_filter, pad_idx, async, 0);
890         if (ret < 0)
891             return ret;
892
893         last_filter = async;
894         pad_idx = 0;
895     }
896
897     if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
898         return ret;
899
900     return 0;
901 }
902
903 #define DESCRIBE_FILTER_LINK(f, inout, in)                         \
904 {                                                                  \
905     AVFilterContext *ctx = inout->filter_ctx;                      \
906     AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
907     int       nb_pads = in ? ctx->input_count : ctx->output_count; \
908     AVIOContext *pb;                                               \
909                                                                    \
910     if (avio_open_dyn_buf(&pb) < 0)                                \
911         exit_program(1);                                           \
912                                                                    \
913     avio_printf(pb, "%s", ctx->filter->name);                      \
914     if (nb_pads > 1)                                               \
915         avio_printf(pb, ":%s", pads[inout->pad_idx].name);         \
916     avio_w8(pb, 0);                                                \
917     avio_close_dyn_buf(pb, &f->name);                              \
918 }
919
920 static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
921 {
922     av_freep(&ofilter->name);
923     DESCRIBE_FILTER_LINK(ofilter, out, 0);
924
925     switch (out->filter_ctx->output_pads[out->pad_idx].type) {
926     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
927     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
928     default: av_assert0(0);
929     }
930 }
931
932 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
933                                         AVFilterInOut *in)
934 {
935     AVFilterContext *first_filter = in->filter_ctx;
936     AVFilter *filter = avfilter_get_by_name("buffer");
937     InputStream *ist = ifilter->ist;
938     AVRational tb = ist->framerate.num ? (AVRational){ist->framerate.den,
939                                                       ist->framerate.num} :
940                                          ist->st->time_base;
941     AVRational sar;
942     char args[255];
943     int pad_idx = in->pad_idx;
944     int ret;
945
946     sar = ist->st->sample_aspect_ratio.num ?
947           ist->st->sample_aspect_ratio :
948           ist->st->codec->sample_aspect_ratio;
949     snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
950              ist->st->codec->height, ist->st->codec->pix_fmt,
951              tb.num, tb.den, sar.num, sar.den);
952
953     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, in->name,
954                                             args, NULL, fg->graph)) < 0)
955         return ret;
956
957     if (ist->framerate.num) {
958         AVFilterContext *setpts;
959
960         if ((ret = avfilter_graph_create_filter(&setpts,
961                                                 avfilter_get_by_name("setpts"),
962                                                 "setpts", "N", NULL,
963                                                 fg->graph)) < 0)
964             return ret;
965
966         if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
967             return ret;
968
969         first_filter = setpts;
970         pad_idx = 0;
971     }
972
973     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
974         return ret;
975     return 0;
976 }
977
978 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
979                                         AVFilterInOut *in)
980 {
981     AVFilterContext *first_filter = in->filter_ctx;
982     AVFilter *filter = avfilter_get_by_name("abuffer");
983     InputStream *ist = ifilter->ist;
984     int pad_idx = in->pad_idx;
985     char args[255];
986     int ret;
987
988     snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
989              ":channel_layout=0x%"PRIx64,
990              ist->st->time_base.num, ist->st->time_base.den,
991              ist->st->codec->sample_rate,
992              av_get_sample_fmt_name(ist->st->codec->sample_fmt),
993              ist->st->codec->channel_layout);
994
995     if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
996                                             in->name, args, NULL,
997                                             fg->graph)) < 0)
998         return ret;
999
1000     if (audio_sync_method > 0) {
1001         AVFilterContext *async;
1002         char args[256];
1003         int  len = 0;
1004
1005         av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
1006                "asyncts audio filter instead.\n");
1007
1008         if (audio_sync_method > 1)
1009             len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
1010                             "max_comp=%d:", audio_sync_method);
1011         snprintf(args + len, sizeof(args) - len, "min_delta=%f",
1012                  audio_drift_threshold);
1013
1014         ret = avfilter_graph_create_filter(&async,
1015                                            avfilter_get_by_name("asyncts"),
1016                                            "async", args, NULL, fg->graph);
1017         if (ret < 0)
1018             return ret;
1019
1020         ret = avfilter_link(async, 0, first_filter, pad_idx);
1021         if (ret < 0)
1022             return ret;
1023
1024         first_filter = async;
1025         pad_idx = 0;
1026     }
1027     if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
1028         return ret;
1029
1030     return 0;
1031 }
1032
1033 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
1034                                   AVFilterInOut *in)
1035 {
1036     av_freep(&ifilter->name);
1037     DESCRIBE_FILTER_LINK(ifilter, in, 1);
1038
1039     switch (in->filter_ctx->input_pads[in->pad_idx].type) {
1040     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
1041     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
1042     default: av_assert0(0);
1043     }
1044 }
1045
1046 static int configure_filtergraph(FilterGraph *fg)
1047 {
1048     AVFilterInOut *inputs, *outputs, *cur;
1049     int ret, i, init = !fg->graph, simple = !fg->graph_desc;
1050     const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
1051                                       fg->graph_desc;
1052
1053     avfilter_graph_free(&fg->graph);
1054     if (!(fg->graph = avfilter_graph_alloc()))
1055         return AVERROR(ENOMEM);
1056
1057     if (simple) {
1058         OutputStream *ost = fg->outputs[0]->ost;
1059         char args[255];
1060         snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
1061         fg->graph->scale_sws_opts = av_strdup(args);
1062     }
1063
1064     if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1065         return ret;
1066
1067     if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1068         av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
1069                "exactly one input and output.\n", graph_desc);
1070         return AVERROR(EINVAL);
1071     }
1072
1073     for (cur = inputs; !simple && init && cur; cur = cur->next)
1074         init_input_filter(fg, cur);
1075
1076     for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1077         if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
1078             return ret;
1079     avfilter_inout_free(&inputs);
1080
1081     if (!init || simple) {
1082         /* we already know the mappings between lavfi outputs and output streams,
1083          * so we can finish the setup */
1084         for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1085             configure_output_filter(fg, fg->outputs[i], cur);
1086         avfilter_inout_free(&outputs);
1087
1088         if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1089             return ret;
1090     } else {
1091         /* wait until output mappings are processed */
1092         for (cur = outputs; cur;) {
1093             fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
1094                                      &fg->nb_outputs, fg->nb_outputs + 1);
1095             if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
1096                 exit_program(1);
1097             fg->outputs[fg->nb_outputs - 1]->graph   = fg;
1098             fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
1099             cur = cur->next;
1100             fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
1101         }
1102     }
1103
1104     return 0;
1105 }
1106
1107 static int configure_complex_filters(void)
1108 {
1109     int i, ret = 0;
1110
1111     for (i = 0; i < nb_filtergraphs; i++)
1112         if (!filtergraphs[i]->graph &&
1113             (ret = configure_filtergraph(filtergraphs[i])) < 0)
1114             return ret;
1115     return 0;
1116 }
1117
1118 static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1119 {
1120     int i;
1121     for (i = 0; i < fg->nb_inputs; i++)
1122         if (fg->inputs[i]->ist == ist)
1123             return 1;
1124     return 0;
1125 }
1126
1127 static void term_exit(void)
1128 {
1129     av_log(NULL, AV_LOG_QUIET, "");
1130 }
1131
1132 static volatile int received_sigterm = 0;
1133 static volatile int received_nb_signals = 0;
1134
1135 static void
1136 sigterm_handler(int sig)
1137 {
1138     received_sigterm = sig;
1139     received_nb_signals++;
1140     term_exit();
1141 }
1142
1143 static void term_init(void)
1144 {
1145     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
1146     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
1147 #ifdef SIGXCPU
1148     signal(SIGXCPU, sigterm_handler);
1149 #endif
1150 }
1151
1152 static int decode_interrupt_cb(void *ctx)
1153 {
1154     return received_nb_signals > 1;
1155 }
1156
1157 static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
1158
1159 void exit_program(int ret)
1160 {
1161     int i, j;
1162
1163     for (i = 0; i < nb_filtergraphs; i++) {
1164         avfilter_graph_free(&filtergraphs[i]->graph);
1165         for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
1166             av_freep(&filtergraphs[i]->inputs[j]->name);
1167             av_freep(&filtergraphs[i]->inputs[j]);
1168         }
1169         av_freep(&filtergraphs[i]->inputs);
1170         for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
1171             av_freep(&filtergraphs[i]->outputs[j]->name);
1172             av_freep(&filtergraphs[i]->outputs[j]);
1173         }
1174         av_freep(&filtergraphs[i]->outputs);
1175         av_freep(&filtergraphs[i]);
1176     }
1177     av_freep(&filtergraphs);
1178
1179     /* close files */
1180     for (i = 0; i < nb_output_files; i++) {
1181         AVFormatContext *s = output_files[i]->ctx;
1182         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1183             avio_close(s->pb);
1184         avformat_free_context(s);
1185         av_dict_free(&output_files[i]->opts);
1186         av_freep(&output_files[i]);
1187     }
1188     for (i = 0; i < nb_output_streams; i++) {
1189         AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
1190         while (bsfc) {
1191             AVBitStreamFilterContext *next = bsfc->next;
1192             av_bitstream_filter_close(bsfc);
1193             bsfc = next;
1194         }
1195         output_streams[i]->bitstream_filters = NULL;
1196
1197         av_freep(&output_streams[i]->avfilter);
1198         av_freep(&output_streams[i]->filtered_frame);
1199         av_freep(&output_streams[i]);
1200     }
1201     for (i = 0; i < nb_input_files; i++) {
1202         avformat_close_input(&input_files[i]->ctx);
1203         av_freep(&input_files[i]);
1204     }
1205     for (i = 0; i < nb_input_streams; i++) {
1206         av_freep(&input_streams[i]->decoded_frame);
1207         av_dict_free(&input_streams[i]->opts);
1208         free_buffer_pool(input_streams[i]);
1209         av_freep(&input_streams[i]->filters);
1210         av_freep(&input_streams[i]);
1211     }
1212
1213     if (vstats_file)
1214         fclose(vstats_file);
1215     av_free(vstats_filename);
1216
1217     av_freep(&input_streams);
1218     av_freep(&input_files);
1219     av_freep(&output_streams);
1220     av_freep(&output_files);
1221
1222     uninit_opts();
1223
1224     avfilter_uninit();
1225     avformat_network_deinit();
1226
1227     if (received_sigterm) {
1228         av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
1229                (int) received_sigterm);
1230         exit (255);
1231     }
1232
1233     exit(ret);
1234 }
1235
1236 static void assert_avoptions(AVDictionary *m)
1237 {
1238     AVDictionaryEntry *t;
1239     if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1240         av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
1241         exit_program(1);
1242     }
1243 }
1244
1245 static void assert_codec_experimental(AVCodecContext *c, int encoder)
1246 {
1247     const char *codec_string = encoder ? "encoder" : "decoder";
1248     AVCodec *codec;
1249     if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
1250         c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1251         av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
1252                 "results.\nAdd '-strict experimental' if you want to use it.\n",
1253                 codec_string, c->codec->name);
1254         codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
1255         if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
1256             av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
1257                    codec_string, codec->name);
1258         exit_program(1);
1259     }
1260 }
1261
1262 /**
1263  * Update the requested input sample format based on the output sample format.
1264  * This is currently only used to request float output from decoders which
1265  * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
1266  * Ideally this will be removed in the future when decoders do not do format
1267  * conversion and only output in their native format.
1268  */
1269 static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
1270                               AVCodecContext *enc)
1271 {
1272     /* if sample formats match or a decoder sample format has already been
1273        requested, just return */
1274     if (enc->sample_fmt == dec->sample_fmt ||
1275         dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
1276         return;
1277
1278     /* if decoder supports more than one output format */
1279     if (dec_codec && dec_codec->sample_fmts &&
1280         dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
1281         dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
1282         const enum AVSampleFormat *p;
1283         int min_dec = -1, min_inc = -1;
1284
1285         /* find a matching sample format in the encoder */
1286         for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
1287             if (*p == enc->sample_fmt) {
1288                 dec->request_sample_fmt = *p;
1289                 return;
1290             } else if (*p > enc->sample_fmt) {
1291                 min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
1292             } else
1293                 min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
1294         }
1295
1296         /* if none match, provide the one that matches quality closest */
1297         dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
1298                                   enc->sample_fmt - min_dec;
1299     }
1300 }
1301
1302 static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
1303 {
1304     AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
1305     AVCodecContext          *avctx = ost->st->codec;
1306     int ret;
1307
1308     /*
1309      * Audio encoders may split the packets --  #frames in != #packets out.
1310      * But there is no reordering, so we can limit the number of output packets
1311      * by simply dropping them here.
1312      * Counting encoded video frames needs to be done separately because of
1313      * reordering, see do_video_out()
1314      */
1315     if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
1316         if (ost->frame_number >= ost->max_frames) {
1317             av_free_packet(pkt);
1318             return;
1319         }
1320         ost->frame_number++;
1321     }
1322
1323     while (bsfc) {
1324         AVPacket new_pkt = *pkt;
1325         int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
1326                                            &new_pkt.data, &new_pkt.size,
1327                                            pkt->data, pkt->size,
1328                                            pkt->flags & AV_PKT_FLAG_KEY);
1329         if (a > 0) {
1330             av_free_packet(pkt);
1331             new_pkt.destruct = av_destruct_packet;
1332         } else if (a < 0) {
1333             av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
1334                    bsfc->filter->name, pkt->stream_index,
1335                    avctx->codec ? avctx->codec->name : "copy");
1336             print_error("", a);
1337             if (exit_on_error)
1338                 exit_program(1);
1339         }
1340         *pkt = new_pkt;
1341
1342         bsfc = bsfc->next;
1343     }
1344
1345     pkt->stream_index = ost->index;
1346     ret = av_interleaved_write_frame(s, pkt);
1347     if (ret < 0) {
1348         print_error("av_interleaved_write_frame()", ret);
1349         exit_program(1);
1350     }
1351 }
1352
1353 static int check_recording_time(OutputStream *ost)
1354 {
1355     OutputFile *of = output_files[ost->file_index];
1356
1357     if (of->recording_time != INT64_MAX &&
1358         av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
1359                       AV_TIME_BASE_Q) >= 0) {
1360         ost->is_past_recording_time = 1;
1361         return 0;
1362     }
1363     return 1;
1364 }
1365
1366 static void do_audio_out(AVFormatContext *s, OutputStream *ost,
1367                          AVFrame *frame)
1368 {
1369     AVCodecContext *enc = ost->st->codec;
1370     AVPacket pkt;
1371     int got_packet = 0;
1372
1373     av_init_packet(&pkt);
1374     pkt.data = NULL;
1375     pkt.size = 0;
1376
1377     if (!check_recording_time(ost))
1378         return;
1379
1380     if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
1381         frame->pts = ost->sync_opts;
1382     ost->sync_opts = frame->pts + frame->nb_samples;
1383
1384     if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
1385         av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
1386         exit_program(1);
1387     }
1388
1389     if (got_packet) {
1390         if (pkt.pts != AV_NOPTS_VALUE)
1391             pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
1392         if (pkt.dts != AV_NOPTS_VALUE)
1393             pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
1394         if (pkt.duration > 0)
1395             pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
1396
1397         write_frame(s, &pkt, ost);
1398
1399         audio_size += pkt.size;
1400     }
1401 }
1402
1403 static void pre_process_video_frame(InputStream *ist, AVPicture *picture, void **bufp)
1404 {
1405     AVCodecContext *dec;
1406     AVPicture *picture2;
1407     AVPicture picture_tmp;
1408     uint8_t *buf = 0;
1409
1410     dec = ist->st->codec;
1411
1412     /* deinterlace : must be done before any resize */
1413     if (do_deinterlace) {
1414         int size;
1415
1416         /* create temporary picture */
1417         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
1418         buf  = av_malloc(size);
1419         if (!buf)
1420             return;
1421
1422         picture2 = &picture_tmp;
1423         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
1424
1425         if (avpicture_deinterlace(picture2, picture,
1426                                  dec->pix_fmt, dec->width, dec->height) < 0) {
1427             /* if error, do not deinterlace */
1428             av_log(NULL, AV_LOG_WARNING, "Deinterlacing failed\n");
1429             av_free(buf);
1430             buf = NULL;
1431             picture2 = picture;
1432         }
1433     } else {
1434         picture2 = picture;
1435     }
1436
1437     if (picture != picture2)
1438         *picture = *picture2;
1439     *bufp = buf;
1440 }
1441
1442 static void do_subtitle_out(AVFormatContext *s,
1443                             OutputStream *ost,
1444                             InputStream *ist,
1445                             AVSubtitle *sub,
1446                             int64_t pts)
1447 {
1448     static uint8_t *subtitle_out = NULL;
1449     int subtitle_out_max_size = 1024 * 1024;
1450     int subtitle_out_size, nb, i;
1451     AVCodecContext *enc;
1452     AVPacket pkt;
1453
1454     if (pts == AV_NOPTS_VALUE) {
1455         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
1456         if (exit_on_error)
1457             exit_program(1);
1458         return;
1459     }
1460
1461     enc = ost->st->codec;
1462
1463     if (!subtitle_out) {
1464         subtitle_out = av_malloc(subtitle_out_max_size);
1465     }
1466
1467     /* Note: DVB subtitle need one packet to draw them and one other
1468        packet to clear them */
1469     /* XXX: signal it in the codec context ? */
1470     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
1471         nb = 2;
1472     else
1473         nb = 1;
1474
1475     for (i = 0; i < nb; i++) {
1476         ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
1477         if (!check_recording_time(ost))
1478             return;
1479
1480         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
1481         // start_display_time is required to be 0
1482         sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
1483         sub->end_display_time  -= sub->start_display_time;
1484         sub->start_display_time = 0;
1485         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
1486                                                     subtitle_out_max_size, sub);
1487         if (subtitle_out_size < 0) {
1488             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
1489             exit_program(1);
1490         }
1491
1492         av_init_packet(&pkt);
1493         pkt.data = subtitle_out;
1494         pkt.size = subtitle_out_size;
1495         pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
1496         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
1497             /* XXX: the pts correction is handled here. Maybe handling
1498                it in the codec would be better */
1499             if (i == 0)
1500                 pkt.pts += 90 * sub->start_display_time;
1501             else
1502                 pkt.pts += 90 * sub->end_display_time;
1503         }
1504         write_frame(s, &pkt, ost);
1505     }
1506 }
1507
1508 static void do_video_out(AVFormatContext *s,
1509                          OutputStream *ost,
1510                          AVFrame *in_picture,
1511                          int *frame_size, float quality)
1512 {
1513     int ret, format_video_sync;
1514     AVPacket pkt;
1515     AVCodecContext *enc = ost->st->codec;
1516
1517     *frame_size = 0;
1518
1519     format_video_sync = video_sync_method;
1520     if (format_video_sync == VSYNC_AUTO)
1521         format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
1522                             (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
1523     if (format_video_sync != VSYNC_PASSTHROUGH &&
1524         ost->frame_number &&
1525         in_picture->pts != AV_NOPTS_VALUE &&
1526         in_picture->pts < ost->sync_opts) {
1527         nb_frames_drop++;
1528         av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
1529         return;
1530     }
1531
1532     if (in_picture->pts == AV_NOPTS_VALUE)
1533         in_picture->pts = ost->sync_opts;
1534     ost->sync_opts = in_picture->pts;
1535
1536
1537     if (!ost->frame_number)
1538         ost->first_pts = in_picture->pts;
1539
1540     av_init_packet(&pkt);
1541     pkt.data = NULL;
1542     pkt.size = 0;
1543
1544     if (!check_recording_time(ost) ||
1545         ost->frame_number >= ost->max_frames)
1546         return;
1547
1548     if (s->oformat->flags & AVFMT_RAWPICTURE &&
1549         enc->codec->id == CODEC_ID_RAWVIDEO) {
1550         /* raw pictures are written as AVPicture structure to
1551            avoid any copies. We support temporarily the older
1552            method. */
1553         enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
1554         enc->coded_frame->top_field_first  = in_picture->top_field_first;
1555         pkt.data   = (uint8_t *)in_picture;
1556         pkt.size   =  sizeof(AVPicture);
1557         pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
1558         pkt.flags |= AV_PKT_FLAG_KEY;
1559
1560         write_frame(s, &pkt, ost);
1561     } else {
1562         int got_packet;
1563         AVFrame big_picture;
1564
1565         big_picture = *in_picture;
1566         /* better than nothing: use input picture interlaced
1567            settings */
1568         big_picture.interlaced_frame = in_picture->interlaced_frame;
1569         if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {
1570             if (ost->top_field_first == -1)
1571                 big_picture.top_field_first = in_picture->top_field_first;
1572             else
1573                 big_picture.top_field_first = !!ost->top_field_first;
1574         }
1575
1576         /* handles same_quant here. This is not correct because it may
1577            not be a global option */
1578         big_picture.quality = quality;
1579         if (!enc->me_threshold)
1580             big_picture.pict_type = 0;
1581         if (ost->forced_kf_index < ost->forced_kf_count &&
1582             big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
1583             big_picture.pict_type = AV_PICTURE_TYPE_I;
1584             ost->forced_kf_index++;
1585         }
1586         ret = avcodec_encode_video2(enc, &pkt, &big_picture, &got_packet);
1587         if (ret < 0) {
1588             av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
1589             exit_program(1);
1590         }
1591
1592         if (got_packet) {
1593             if (pkt.pts != AV_NOPTS_VALUE)
1594                 pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1595             if (pkt.dts != AV_NOPTS_VALUE)
1596                 pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1597
1598             write_frame(s, &pkt, ost);
1599             *frame_size = pkt.size;
1600             video_size += pkt.size;
1601
1602             /* if two pass, output log */
1603             if (ost->logfile && enc->stats_out) {
1604                 fprintf(ost->logfile, "%s", enc->stats_out);
1605             }
1606         }
1607     }
1608     ost->sync_opts++;
1609     /*
1610      * For video, number of frames in == number of packets out.
1611      * But there may be reordering, so we can't throw away frames on encoder
1612      * flush, we need to limit them here, before they go into encoder.
1613      */
1614     ost->frame_number++;
1615 }
1616
1617 static double psnr(double d)
1618 {
1619     return -10.0 * log(d) / log(10.0);
1620 }
1621
1622 static void do_video_stats(AVFormatContext *os, OutputStream *ost,
1623                            int frame_size)
1624 {
1625     AVCodecContext *enc;
1626     int frame_number;
1627     double ti1, bitrate, avg_bitrate;
1628
1629     /* this is executed just the first time do_video_stats is called */
1630     if (!vstats_file) {
1631         vstats_file = fopen(vstats_filename, "w");
1632         if (!vstats_file) {
1633             perror("fopen");
1634             exit_program(1);
1635         }
1636     }
1637
1638     enc = ost->st->codec;
1639     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1640         frame_number = ost->frame_number;
1641         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
1642         if (enc->flags&CODEC_FLAG_PSNR)
1643             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
1644
1645         fprintf(vstats_file,"f_size= %6d ", frame_size);
1646         /* compute pts value */
1647         ti1 = ost->sync_opts * av_q2d(enc->time_base);
1648         if (ti1 < 0.01)
1649             ti1 = 0.01;
1650
1651         bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
1652         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
1653         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
1654                (double)video_size / 1024, ti1, bitrate, avg_bitrate);
1655         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
1656     }
1657 }
1658
1659 /* check for new output on any of the filtergraphs */
1660 static int poll_filters(void)
1661 {
1662     AVFilterBufferRef *picref;
1663     AVFrame *filtered_frame = NULL;
1664     int i, frame_size;
1665
1666     for (i = 0; i < nb_output_streams; i++) {
1667         OutputStream *ost = output_streams[i];
1668         OutputFile    *of = output_files[ost->file_index];
1669         int ret = 0;
1670
1671         if (!ost->filter || ost->is_past_recording_time)
1672             continue;
1673
1674         if (!ost->filtered_frame && !(ost->filtered_frame = avcodec_alloc_frame())) {
1675             return AVERROR(ENOMEM);
1676         } else
1677             avcodec_get_frame_defaults(ost->filtered_frame);
1678         filtered_frame = ost->filtered_frame;
1679
1680         while (ret >= 0) {
1681             if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1682                 !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
1683                 ret = av_buffersink_read_samples(ost->filter->filter, &picref,
1684                                                  ost->st->codec->frame_size);
1685             else
1686                 ret = av_buffersink_read(ost->filter->filter, &picref);
1687
1688             if (ret < 0)
1689                 break;
1690
1691             avfilter_copy_buf_props(filtered_frame, picref);
1692             if (picref->pts != AV_NOPTS_VALUE)
1693                 filtered_frame->pts = av_rescale_q(picref->pts,
1694                                                    ost->filter->filter->inputs[0]->time_base,
1695                                                    ost->st->codec->time_base) -
1696                                       av_rescale_q(of->start_time,
1697                                                    AV_TIME_BASE_Q,
1698                                                    ost->st->codec->time_base);
1699
1700             if (of->start_time && filtered_frame->pts < of->start_time) {
1701                 avfilter_unref_buffer(picref);
1702                 continue;
1703             }
1704
1705             switch (ost->filter->filter->inputs[0]->type) {
1706             case AVMEDIA_TYPE_VIDEO:
1707                 if (!ost->frame_aspect_ratio)
1708                     ost->st->codec->sample_aspect_ratio = picref->video->pixel_aspect;
1709
1710                 do_video_out(of->ctx, ost, filtered_frame, &frame_size,
1711                              same_quant ? ost->last_quality :
1712                                           ost->st->codec->global_quality);
1713                 if (vstats_filename && frame_size)
1714                     do_video_stats(of->ctx, ost, frame_size);
1715                 break;
1716             case AVMEDIA_TYPE_AUDIO:
1717                 do_audio_out(of->ctx, ost, filtered_frame);
1718                 break;
1719             default:
1720                 // TODO support subtitle filters
1721                 av_assert0(0);
1722             }
1723
1724             avfilter_unref_buffer(picref);
1725         }
1726     }
1727     return 0;
1728 }
1729
1730 static void print_report(int is_last_report, int64_t timer_start)
1731 {
1732     char buf[1024];
1733     OutputStream *ost;
1734     AVFormatContext *oc;
1735     int64_t total_size;
1736     AVCodecContext *enc;
1737     int frame_number, vid, i;
1738     double bitrate, ti1, pts;
1739     static int64_t last_time = -1;
1740     static int qp_histogram[52];
1741
1742     if (!print_stats && !is_last_report)
1743         return;
1744
1745     if (!is_last_report) {
1746         int64_t cur_time;
1747         /* display the report every 0.5 seconds */
1748         cur_time = av_gettime();
1749         if (last_time == -1) {
1750             last_time = cur_time;
1751             return;
1752         }
1753         if ((cur_time - last_time) < 500000)
1754             return;
1755         last_time = cur_time;
1756     }
1757
1758
1759     oc = output_files[0]->ctx;
1760
1761     total_size = avio_size(oc->pb);
1762     if (total_size < 0) // FIXME improve avio_size() so it works with non seekable output too
1763         total_size = avio_tell(oc->pb);
1764
1765     buf[0] = '\0';
1766     ti1 = 1e10;
1767     vid = 0;
1768     for (i = 0; i < nb_output_streams; i++) {
1769         float q = -1;
1770         ost = output_streams[i];
1771         enc = ost->st->codec;
1772         if (!ost->stream_copy && enc->coded_frame)
1773             q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
1774         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1775             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
1776         }
1777         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
1778             float t = (av_gettime() - timer_start) / 1000000.0;
1779
1780             frame_number = ost->frame_number;
1781             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
1782                      frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
1783             if (is_last_report)
1784                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
1785             if (qp_hist) {
1786                 int j;
1787                 int qp = lrintf(q);
1788                 if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
1789                     qp_histogram[qp]++;
1790                 for (j = 0; j < 32; j++)
1791                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j] + 1) / log(2)));
1792             }
1793             if (enc->flags&CODEC_FLAG_PSNR) {
1794                 int j;
1795                 double error, error_sum = 0;
1796                 double scale, scale_sum = 0;
1797                 char type[3] = { 'Y','U','V' };
1798                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
1799                 for (j = 0; j < 3; j++) {
1800                     if (is_last_report) {
1801                         error = enc->error[j];
1802                         scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
1803                     } else {
1804                         error = enc->coded_frame->error[j];
1805                         scale = enc->width * enc->height * 255.0 * 255.0;
1806                     }
1807                     if (j)
1808                         scale /= 4;
1809                     error_sum += error;
1810                     scale_sum += scale;
1811                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
1812                 }
1813                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
1814             }
1815             vid = 1;
1816         }
1817         /* compute min output value */
1818         pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
1819         if ((pts < ti1) && (pts > 0))
1820             ti1 = pts;
1821     }
1822     if (ti1 < 0.01)
1823         ti1 = 0.01;
1824
1825     bitrate = (double)(total_size * 8) / ti1 / 1000.0;
1826
1827     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
1828             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
1829             (double)total_size / 1024, ti1, bitrate);
1830
1831     if (nb_frames_dup || nb_frames_drop)
1832         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
1833                 nb_frames_dup, nb_frames_drop);
1834
1835     av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
1836
1837     fflush(stderr);
1838
1839     if (is_last_report) {
1840         int64_t raw= audio_size + video_size + extra_size;
1841         av_log(NULL, AV_LOG_INFO, "\n");
1842         av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
1843                video_size / 1024.0,
1844                audio_size / 1024.0,
1845                extra_size / 1024.0,
1846                100.0 * (total_size - raw) / raw
1847         );
1848     }
1849 }
1850
1851 static void flush_encoders(void)
1852 {
1853     int i, ret;
1854
1855     for (i = 0; i < nb_output_streams; i++) {
1856         OutputStream   *ost = output_streams[i];
1857         AVCodecContext *enc = ost->st->codec;
1858         AVFormatContext *os = output_files[ost->file_index]->ctx;
1859         int stop_encoding = 0;
1860
1861         if (!ost->encoding_needed)
1862             continue;
1863
1864         if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
1865             continue;
1866         if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == CODEC_ID_RAWVIDEO)
1867             continue;
1868
1869         for (;;) {
1870             int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
1871             const char *desc;
1872             int64_t *size;
1873
1874             switch (ost->st->codec->codec_type) {
1875             case AVMEDIA_TYPE_AUDIO:
1876                 encode = avcodec_encode_audio2;
1877                 desc   = "Audio";
1878                 size   = &audio_size;
1879                 break;
1880             case AVMEDIA_TYPE_VIDEO:
1881                 encode = avcodec_encode_video2;
1882                 desc   = "Video";
1883                 size   = &video_size;
1884                 break;
1885             default:
1886                 stop_encoding = 1;
1887             }
1888
1889             if (encode) {
1890                 AVPacket pkt;
1891                 int got_packet;
1892                 av_init_packet(&pkt);
1893                 pkt.data = NULL;
1894                 pkt.size = 0;
1895
1896                 ret = encode(enc, &pkt, NULL, &got_packet);
1897                 if (ret < 0) {
1898                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
1899                     exit_program(1);
1900                 }
1901                 *size += ret;
1902                 if (ost->logfile && enc->stats_out) {
1903                     fprintf(ost->logfile, "%s", enc->stats_out);
1904                 }
1905                 if (!got_packet) {
1906                     stop_encoding = 1;
1907                     break;
1908                 }
1909                 if (pkt.pts != AV_NOPTS_VALUE)
1910                     pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
1911                 if (pkt.dts != AV_NOPTS_VALUE)
1912                     pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
1913                 write_frame(os, &pkt, ost);
1914             }
1915
1916             if (stop_encoding)
1917                 break;
1918         }
1919     }
1920 }
1921
1922 /*
1923  * Check whether a packet from ist should be written into ost at this time
1924  */
1925 static int check_output_constraints(InputStream *ist, OutputStream *ost)
1926 {
1927     OutputFile *of = output_files[ost->file_index];
1928     int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
1929
1930     if (ost->source_index != ist_index)
1931         return 0;
1932
1933     if (of->start_time && ist->last_dts < of->start_time)
1934         return 0;
1935
1936     return 1;
1937 }
1938
1939 static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
1940 {
1941     OutputFile *of = output_files[ost->file_index];
1942     int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
1943     AVPacket opkt;
1944
1945     av_init_packet(&opkt);
1946
1947     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
1948         !ost->copy_initial_nonkeyframes)
1949         return;
1950
1951     if (of->recording_time != INT64_MAX &&
1952         ist->last_dts >= of->recording_time + of->start_time) {
1953         ost->is_past_recording_time = 1;
1954         return;
1955     }
1956
1957     /* force the input stream PTS */
1958     if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1959         audio_size += pkt->size;
1960     else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1961         video_size += pkt->size;
1962         ost->sync_opts++;
1963     }
1964
1965     if (pkt->pts != AV_NOPTS_VALUE)
1966         opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
1967     else
1968         opkt.pts = AV_NOPTS_VALUE;
1969
1970     if (pkt->dts == AV_NOPTS_VALUE)
1971         opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
1972     else
1973         opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
1974     opkt.dts -= ost_tb_start_time;
1975
1976     opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
1977     opkt.flags    = pkt->flags;
1978
1979     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
1980     if (  ost->st->codec->codec_id != CODEC_ID_H264
1981        && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
1982        && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
1983        && ost->st->codec->codec_id != CODEC_ID_VC1
1984        ) {
1985         if (av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY))
1986             opkt.destruct = av_destruct_packet;
1987     } else {
1988         opkt.data = pkt->data;
1989         opkt.size = pkt->size;
1990     }
1991
1992     write_frame(of->ctx, &opkt, ost);
1993     ost->st->codec->frame_number++;
1994     av_free_packet(&opkt);
1995 }
1996
1997 static void rate_emu_sleep(InputStream *ist)
1998 {
1999     if (input_files[ist->file_index]->rate_emu) {
2000         int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
2001         int64_t now = av_gettime() - ist->start;
2002         if (pts > now)
2003             usleep(pts - now);
2004     }
2005 }
2006
2007 static int guess_input_channel_layout(InputStream *ist)
2008 {
2009     AVCodecContext *dec = ist->st->codec;
2010
2011     if (!dec->channel_layout) {
2012         char layout_name[256];
2013
2014         dec->channel_layout = av_get_default_channel_layout(dec->channels);
2015         if (!dec->channel_layout)
2016             return 0;
2017         av_get_channel_layout_string(layout_name, sizeof(layout_name),
2018                                      dec->channels, dec->channel_layout);
2019         av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
2020                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
2021     }
2022     return 1;
2023 }
2024
2025 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
2026 {
2027     AVFrame *decoded_frame;
2028     AVCodecContext *avctx = ist->st->codec;
2029     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);
2030     int i, ret, resample_changed;
2031
2032     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2033         return AVERROR(ENOMEM);
2034     else
2035         avcodec_get_frame_defaults(ist->decoded_frame);
2036     decoded_frame = ist->decoded_frame;
2037
2038     ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
2039     if (ret < 0) {
2040         return ret;
2041     }
2042
2043     if (!*got_output) {
2044         /* no audio frame */
2045         if (!pkt->size)
2046             for (i = 0; i < ist->nb_filters; i++)
2047                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2048         return ret;
2049     }
2050
2051     /* if the decoder provides a pts, use it instead of the last packet pts.
2052        the decoder could be delaying output by a packet or more. */
2053     if (decoded_frame->pts != AV_NOPTS_VALUE)
2054         ist->next_dts = decoded_frame->pts;
2055     else if (pkt->pts != AV_NOPTS_VALUE) {
2056         decoded_frame->pts = pkt->pts;
2057         pkt->pts           = AV_NOPTS_VALUE;
2058     }
2059
2060     // preprocess audio (volume)
2061     if (audio_volume != 256) {
2062         int decoded_data_size = decoded_frame->nb_samples * avctx->channels * bps;
2063         void *samples = decoded_frame->data[0];
2064         switch (avctx->sample_fmt) {
2065         case AV_SAMPLE_FMT_U8:
2066         {
2067             uint8_t *volp = samples;
2068             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2069                 int v = (((*volp - 128) * audio_volume + 128) >> 8) + 128;
2070                 *volp++ = av_clip_uint8(v);
2071             }
2072             break;
2073         }
2074         case AV_SAMPLE_FMT_S16:
2075         {
2076             int16_t *volp = samples;
2077             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2078                 int v = ((*volp) * audio_volume + 128) >> 8;
2079                 *volp++ = av_clip_int16(v);
2080             }
2081             break;
2082         }
2083         case AV_SAMPLE_FMT_S32:
2084         {
2085             int32_t *volp = samples;
2086             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2087                 int64_t v = (((int64_t)*volp * audio_volume + 128) >> 8);
2088                 *volp++ = av_clipl_int32(v);
2089             }
2090             break;
2091         }
2092         case AV_SAMPLE_FMT_FLT:
2093         {
2094             float *volp = samples;
2095             float scale = audio_volume / 256.f;
2096             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2097                 *volp++ *= scale;
2098             }
2099             break;
2100         }
2101         case AV_SAMPLE_FMT_DBL:
2102         {
2103             double *volp = samples;
2104             double scale = audio_volume / 256.;
2105             for (i = 0; i < (decoded_data_size / sizeof(*volp)); i++) {
2106                 *volp++ *= scale;
2107             }
2108             break;
2109         }
2110         default:
2111             av_log(NULL, AV_LOG_FATAL,
2112                    "Audio volume adjustment on sample format %s is not supported.\n",
2113                    av_get_sample_fmt_name(ist->st->codec->sample_fmt));
2114             exit_program(1);
2115         }
2116     }
2117
2118     rate_emu_sleep(ist);
2119
2120     resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
2121                        ist->resample_channels       != avctx->channels               ||
2122                        ist->resample_channel_layout != decoded_frame->channel_layout ||
2123                        ist->resample_sample_rate    != decoded_frame->sample_rate;
2124     if (resample_changed) {
2125         char layout1[64], layout2[64];
2126
2127         if (!guess_input_channel_layout(ist)) {
2128             av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
2129                    "layout for Input Stream #%d.%d\n", ist->file_index,
2130                    ist->st->index);
2131             exit_program(1);
2132         }
2133         decoded_frame->channel_layout = avctx->channel_layout;
2134
2135         av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
2136                                      ist->resample_channel_layout);
2137         av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
2138                                      decoded_frame->channel_layout);
2139
2140         av_log(NULL, AV_LOG_INFO,
2141                "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",
2142                ist->file_index, ist->st->index,
2143                ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
2144                ist->resample_channels, layout1,
2145                decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
2146                avctx->channels, layout2);
2147
2148         ist->resample_sample_fmt     = decoded_frame->format;
2149         ist->resample_sample_rate    = decoded_frame->sample_rate;
2150         ist->resample_channel_layout = decoded_frame->channel_layout;
2151         ist->resample_channels       = avctx->channels;
2152
2153         for (i = 0; i < nb_filtergraphs; i++)
2154             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2155                 configure_filtergraph(filtergraphs[i]) < 0) {
2156                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2157                 exit_program(1);
2158             }
2159     }
2160
2161     for (i = 0; i < ist->nb_filters; i++)
2162         av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2163
2164     return ret;
2165 }
2166
2167 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
2168 {
2169     AVFrame *decoded_frame;
2170     void *buffer_to_free = NULL;
2171     int i, ret = 0, resample_changed;
2172     float quality;
2173
2174     if (!ist->decoded_frame && !(ist->decoded_frame = avcodec_alloc_frame()))
2175         return AVERROR(ENOMEM);
2176     else
2177         avcodec_get_frame_defaults(ist->decoded_frame);
2178     decoded_frame = ist->decoded_frame;
2179
2180     ret = avcodec_decode_video2(ist->st->codec,
2181                                 decoded_frame, got_output, pkt);
2182     if (ret < 0)
2183         return ret;
2184
2185     quality = same_quant ? decoded_frame->quality : 0;
2186     if (!*got_output) {
2187         /* no picture yet */
2188         if (!pkt->size)
2189             for (i = 0; i < ist->nb_filters; i++)
2190                 av_buffersrc_buffer(ist->filters[i]->filter, NULL);
2191         return ret;
2192     }
2193     decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
2194                                            decoded_frame->pkt_dts);
2195     pkt->size = 0;
2196     pre_process_video_frame(ist, (AVPicture *)decoded_frame, &buffer_to_free);
2197
2198     rate_emu_sleep(ist);
2199
2200     if (ist->st->sample_aspect_ratio.num)
2201         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
2202
2203     resample_changed = ist->resample_width   != decoded_frame->width  ||
2204                        ist->resample_height  != decoded_frame->height ||
2205                        ist->resample_pix_fmt != decoded_frame->format;
2206     if (resample_changed) {
2207         av_log(NULL, AV_LOG_INFO,
2208                "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
2209                ist->file_index, ist->st->index,
2210                ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
2211                decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
2212
2213         ist->resample_width   = decoded_frame->width;
2214         ist->resample_height  = decoded_frame->height;
2215         ist->resample_pix_fmt = decoded_frame->format;
2216
2217         for (i = 0; i < nb_filtergraphs; i++)
2218             if (ist_in_filtergraph(filtergraphs[i], ist) &&
2219                 configure_filtergraph(filtergraphs[i]) < 0) {
2220                 av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
2221                 exit_program(1);
2222             }
2223     }
2224
2225     for (i = 0; i < ist->nb_filters; i++) {
2226         // XXX what an ugly hack
2227         if (ist->filters[i]->graph->nb_outputs == 1)
2228             ist->filters[i]->graph->outputs[0]->ost->last_quality = quality;
2229
2230         if (ist->st->codec->codec->capabilities & CODEC_CAP_DR1) {
2231             FrameBuffer      *buf = decoded_frame->opaque;
2232             AVFilterBufferRef *fb = avfilter_get_video_buffer_ref_from_arrays(
2233                                         decoded_frame->data, decoded_frame->linesize,
2234                                         AV_PERM_READ | AV_PERM_PRESERVE,
2235                                         ist->st->codec->width, ist->st->codec->height,
2236                                         ist->st->codec->pix_fmt);
2237
2238             avfilter_copy_frame_props(fb, decoded_frame);
2239             fb->buf->priv           = buf;
2240             fb->buf->free           = filter_release_buffer;
2241
2242             buf->refcount++;
2243             av_buffersrc_buffer(ist->filters[i]->filter, fb);
2244         } else
2245             av_buffersrc_write_frame(ist->filters[i]->filter, decoded_frame);
2246     }
2247
2248     av_free(buffer_to_free);
2249     return ret;
2250 }
2251
2252 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
2253 {
2254     AVSubtitle subtitle;
2255     int i, ret = avcodec_decode_subtitle2(ist->st->codec,
2256                                           &subtitle, got_output, pkt);
2257     if (ret < 0)
2258         return ret;
2259     if (!*got_output)
2260         return ret;
2261
2262     rate_emu_sleep(ist);
2263
2264     for (i = 0; i < nb_output_streams; i++) {
2265         OutputStream *ost = output_streams[i];
2266
2267         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
2268             continue;
2269
2270         do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
2271     }
2272
2273     avsubtitle_free(&subtitle);
2274     return ret;
2275 }
2276
2277 /* pkt = NULL means EOF (needed to flush decoder buffers) */
2278 static int output_packet(InputStream *ist, const AVPacket *pkt)
2279 {
2280     int i;
2281     int got_output;
2282     AVPacket avpkt;
2283
2284     if (ist->next_dts == AV_NOPTS_VALUE)
2285         ist->next_dts = ist->last_dts;
2286
2287     if (pkt == NULL) {
2288         /* EOF handling */
2289         av_init_packet(&avpkt);
2290         avpkt.data = NULL;
2291         avpkt.size = 0;
2292         goto handle_eof;
2293     } else {
2294         avpkt = *pkt;
2295     }
2296
2297     if (pkt->dts != AV_NOPTS_VALUE)
2298         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
2299
2300     // while we have more to decode or while the decoder did output something on EOF
2301     while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
2302         int ret = 0;
2303     handle_eof:
2304
2305         ist->last_dts = ist->next_dts;
2306
2307         if (avpkt.size && avpkt.size != pkt->size) {
2308             av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
2309                    "Multiple frames in a packet from stream %d\n", pkt->stream_index);
2310             ist->showed_multi_packet_warning = 1;
2311         }
2312
2313         switch (ist->st->codec->codec_type) {
2314         case AVMEDIA_TYPE_AUDIO:
2315             ret = decode_audio    (ist, &avpkt, &got_output);
2316             break;
2317         case AVMEDIA_TYPE_VIDEO:
2318             ret = decode_video    (ist, &avpkt, &got_output);
2319             if (avpkt.duration)
2320                 ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
2321             else if (ist->st->r_frame_rate.num)
2322                 ist->next_dts += av_rescale_q(1, (AVRational){ist->st->r_frame_rate.den,
2323                                                               ist->st->r_frame_rate.num},
2324                                               AV_TIME_BASE_Q);
2325             else if (ist->st->codec->time_base.num != 0) {
2326                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
2327                                                    ist->st->codec->ticks_per_frame;
2328                 ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
2329             }
2330             break;
2331         case AVMEDIA_TYPE_SUBTITLE:
2332             ret = transcode_subtitles(ist, &avpkt, &got_output);
2333             break;
2334         default:
2335             return -1;
2336         }
2337
2338         if (ret < 0)
2339             return ret;
2340         // touch data and size only if not EOF
2341         if (pkt) {
2342             avpkt.data += ret;
2343             avpkt.size -= ret;
2344         }
2345         if (!got_output) {
2346             continue;
2347         }
2348     }
2349
2350     /* handle stream copy */
2351     if (!ist->decoding_needed) {
2352         rate_emu_sleep(ist);
2353         ist->last_dts = ist->next_dts;
2354         switch (ist->st->codec->codec_type) {
2355         case AVMEDIA_TYPE_AUDIO:
2356             ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
2357                              ist->st->codec->sample_rate;
2358             break;
2359         case AVMEDIA_TYPE_VIDEO:
2360             if (ist->st->codec->time_base.num != 0) {
2361                 int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
2362                 ist->next_dts += ((int64_t)AV_TIME_BASE *
2363                                   ist->st->codec->time_base.num * ticks) /
2364                                   ist->st->codec->time_base.den;
2365             }
2366             break;
2367         }
2368     }
2369     for (i = 0; pkt && i < nb_output_streams; i++) {
2370         OutputStream *ost = output_streams[i];
2371
2372         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
2373             continue;
2374
2375         do_streamcopy(ist, ost, pkt);
2376     }
2377
2378     return 0;
2379 }
2380
2381 static void print_sdp(void)
2382 {
2383     char sdp[2048];
2384     int i;
2385     AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
2386
2387     if (!avc)
2388         exit_program(1);
2389     for (i = 0; i < nb_output_files; i++)
2390         avc[i] = output_files[i]->ctx;
2391
2392     av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
2393     printf("SDP:\n%s\n", sdp);
2394     fflush(stdout);
2395     av_freep(&avc);
2396 }
2397
2398 static int init_input_stream(int ist_index, char *error, int error_len)
2399 {
2400     int i;
2401     InputStream *ist = input_streams[ist_index];
2402     if (ist->decoding_needed) {
2403         AVCodec *codec = ist->dec;
2404         if (!codec) {
2405             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
2406                     ist->st->codec->codec_id, ist->file_index, ist->st->index);
2407             return AVERROR(EINVAL);
2408         }
2409
2410         /* update requested sample format for the decoder based on the
2411            corresponding encoder sample format */
2412         for (i = 0; i < nb_output_streams; i++) {
2413             OutputStream *ost = output_streams[i];
2414             if (ost->source_index == ist_index) {
2415                 update_sample_fmt(ist->st->codec, codec, ost->st->codec);
2416                 break;
2417             }
2418         }
2419
2420         if (codec->type == AVMEDIA_TYPE_VIDEO && codec->capabilities & CODEC_CAP_DR1) {
2421             ist->st->codec->get_buffer     = codec_get_buffer;
2422             ist->st->codec->release_buffer = codec_release_buffer;
2423             ist->st->codec->opaque         = ist;
2424         }
2425
2426         if (!av_dict_get(ist->opts, "threads", NULL, 0))
2427             av_dict_set(&ist->opts, "threads", "auto", 0);
2428         if (avcodec_open2(ist->st->codec, codec, &ist->opts) < 0) {
2429             snprintf(error, error_len, "Error while opening decoder for input stream #%d:%d",
2430                     ist->file_index, ist->st->index);
2431             return AVERROR(EINVAL);
2432         }
2433         assert_codec_experimental(ist->st->codec, 0);
2434         assert_avoptions(ist->opts);
2435     }
2436
2437     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;
2438     ist->next_dts = AV_NOPTS_VALUE;
2439     init_pts_correction(&ist->pts_ctx);
2440     ist->is_start = 1;
2441
2442     return 0;
2443 }
2444
2445 static InputStream *get_input_stream(OutputStream *ost)
2446 {
2447     if (ost->source_index >= 0)
2448         return input_streams[ost->source_index];
2449
2450     if (ost->filter) {
2451         FilterGraph *fg = ost->filter->graph;
2452         int i;
2453
2454         for (i = 0; i < fg->nb_inputs; i++)
2455             if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
2456                 return fg->inputs[i]->ist;
2457     }
2458
2459     return NULL;
2460 }
2461
2462 static int transcode_init(void)
2463 {
2464     int ret = 0, i, j, k;
2465     AVFormatContext *oc;
2466     AVCodecContext *codec, *icodec;
2467     OutputStream *ost;
2468     InputStream *ist;
2469     char error[1024];
2470     int want_sdp = 1;
2471
2472     /* init framerate emulation */
2473     for (i = 0; i < nb_input_files; i++) {
2474         InputFile *ifile = input_files[i];
2475         if (ifile->rate_emu)
2476             for (j = 0; j < ifile->nb_streams; j++)
2477                 input_streams[j + ifile->ist_index]->start = av_gettime();
2478     }
2479
2480     /* output stream init */
2481     for (i = 0; i < nb_output_files; i++) {
2482         oc = output_files[i]->ctx;
2483         if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
2484             av_dump_format(oc, i, oc->filename, 1);
2485             av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
2486             return AVERROR(EINVAL);
2487         }
2488     }
2489
2490     /* init complex filtergraphs */
2491     for (i = 0; i < nb_filtergraphs; i++)
2492         if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
2493             return ret;
2494
2495     /* for each output stream, we compute the right encoding parameters */
2496     for (i = 0; i < nb_output_streams; i++) {
2497         ost = output_streams[i];
2498         oc  = output_files[ost->file_index]->ctx;
2499         ist = get_input_stream(ost);
2500
2501         if (ost->attachment_filename)
2502             continue;
2503
2504         codec  = ost->st->codec;
2505
2506         if (ist) {
2507             icodec = ist->st->codec;
2508
2509             ost->st->disposition          = ist->st->disposition;
2510             codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
2511             codec->chroma_sample_location = icodec->chroma_sample_location;
2512         }
2513
2514         if (ost->stream_copy) {
2515             uint64_t extra_size;
2516
2517             av_assert0(ist && !ost->filter);
2518
2519             extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
2520
2521             if (extra_size > INT_MAX) {
2522                 return AVERROR(EINVAL);
2523             }
2524
2525             /* if stream_copy is selected, no need to decode or encode */
2526             codec->codec_id   = icodec->codec_id;
2527             codec->codec_type = icodec->codec_type;
2528
2529             if (!codec->codec_tag) {
2530                 if (!oc->oformat->codec_tag ||
2531                      av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
2532                      av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
2533                     codec->codec_tag = icodec->codec_tag;
2534             }
2535
2536             codec->bit_rate       = icodec->bit_rate;
2537             codec->rc_max_rate    = icodec->rc_max_rate;
2538             codec->rc_buffer_size = icodec->rc_buffer_size;
2539             codec->field_order    = icodec->field_order;
2540             codec->extradata      = av_mallocz(extra_size);
2541             if (!codec->extradata) {
2542                 return AVERROR(ENOMEM);
2543             }
2544             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
2545             codec->extradata_size = icodec->extradata_size;
2546             if (!copy_tb) {
2547                 codec->time_base      = icodec->time_base;
2548                 codec->time_base.num *= icodec->ticks_per_frame;
2549                 av_reduce(&codec->time_base.num, &codec->time_base.den,
2550                           codec->time_base.num, codec->time_base.den, INT_MAX);
2551             } else
2552                 codec->time_base = ist->st->time_base;
2553
2554             switch (codec->codec_type) {
2555             case AVMEDIA_TYPE_AUDIO:
2556                 if (audio_volume != 256) {
2557                     av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
2558                     exit_program(1);
2559                 }
2560                 codec->channel_layout     = icodec->channel_layout;
2561                 codec->sample_rate        = icodec->sample_rate;
2562                 codec->channels           = icodec->channels;
2563                 codec->frame_size         = icodec->frame_size;
2564                 codec->audio_service_type = icodec->audio_service_type;
2565                 codec->block_align        = icodec->block_align;
2566                 break;
2567             case AVMEDIA_TYPE_VIDEO:
2568                 codec->pix_fmt            = icodec->pix_fmt;
2569                 codec->width              = icodec->width;
2570                 codec->height             = icodec->height;
2571                 codec->has_b_frames       = icodec->has_b_frames;
2572                 if (!codec->sample_aspect_ratio.num) {
2573                     codec->sample_aspect_ratio   =
2574                     ost->st->sample_aspect_ratio =
2575                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
2576                         ist->st->codec->sample_aspect_ratio.num ?
2577                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
2578                 }
2579                 break;
2580             case AVMEDIA_TYPE_SUBTITLE:
2581                 codec->width  = icodec->width;
2582                 codec->height = icodec->height;
2583                 break;
2584             case AVMEDIA_TYPE_DATA:
2585             case AVMEDIA_TYPE_ATTACHMENT:
2586                 break;
2587             default:
2588                 abort();
2589             }
2590         } else {
2591             if (!ost->enc) {
2592                 /* should only happen when a default codec is not present. */
2593                 snprintf(error, sizeof(error), "Automatic encoder selection "
2594                          "failed for output stream #%d:%d. Default encoder for "
2595                          "format %s is probably disabled. Please choose an "
2596                          "encoder manually.\n", ost->file_index, ost->index,
2597                          oc->oformat->name);
2598                 ret = AVERROR(EINVAL);
2599                 goto dump_format;
2600             }
2601
2602             if (ist)
2603                 ist->decoding_needed = 1;
2604             ost->encoding_needed = 1;
2605
2606             /*
2607              * We want CFR output if and only if one of those is true:
2608              * 1) user specified output framerate with -r
2609              * 2) user specified -vsync cfr
2610              * 3) output format is CFR and the user didn't force vsync to
2611              *    something else than CFR
2612              *
2613              * in such a case, set ost->frame_rate
2614              */
2615             if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
2616                 !ost->frame_rate.num && ist &&
2617                 (video_sync_method ==  VSYNC_CFR ||
2618                  (video_sync_method ==  VSYNC_AUTO &&
2619                   !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
2620                 ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25, 1};
2621                 if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
2622                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
2623                     ost->frame_rate = ost->enc->supported_framerates[idx];
2624                 }
2625             }
2626
2627             if (!ost->filter &&
2628                 (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2629                  codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
2630                     FilterGraph *fg;
2631                     fg = init_simple_filtergraph(ist, ost);
2632                     if (configure_filtergraph(fg)) {
2633                         av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
2634                         exit(1);
2635                     }
2636             }
2637
2638             switch (codec->codec_type) {
2639             case AVMEDIA_TYPE_AUDIO:
2640                 codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
2641                 codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
2642                 codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
2643                 codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
2644                 codec->time_base      = (AVRational){ 1, codec->sample_rate };
2645                 break;
2646             case AVMEDIA_TYPE_VIDEO:
2647                 codec->time_base = ost->filter->filter->inputs[0]->time_base;
2648
2649                 codec->width  = ost->filter->filter->inputs[0]->w;
2650                 codec->height = ost->filter->filter->inputs[0]->h;
2651                 codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
2652                     ost->frame_aspect_ratio ? // overridden by the -aspect cli option
2653                     av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
2654                     ost->filter->filter->inputs[0]->sample_aspect_ratio;
2655                 codec->pix_fmt = ost->filter->filter->inputs[0]->format;
2656
2657                 if (codec->width   != icodec->width  ||
2658                     codec->height  != icodec->height ||
2659                     codec->pix_fmt != icodec->pix_fmt) {
2660                     codec->bits_per_raw_sample = 0;
2661                 }
2662
2663                 break;
2664             case AVMEDIA_TYPE_SUBTITLE:
2665                 codec->time_base = (AVRational){1, 1000};
2666                 break;
2667             default:
2668                 abort();
2669                 break;
2670             }
2671             /* two pass mode */
2672             if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
2673                 char logfilename[1024];
2674                 FILE *f;
2675
2676                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
2677                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
2678                          i);
2679                 if (!strcmp(ost->enc->name, "libx264")) {
2680                     av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
2681                 } else {
2682                     if (codec->flags & CODEC_FLAG_PASS1) {
2683                         f = fopen(logfilename, "wb");
2684                         if (!f) {
2685                             av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
2686                                    logfilename, strerror(errno));
2687                             exit_program(1);
2688                         }
2689                         ost->logfile = f;
2690                     } else {
2691                         char  *logbuffer;
2692                         size_t logbuffer_size;
2693                         if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
2694                             av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
2695                                    logfilename);
2696                             exit_program(1);
2697                         }
2698                         codec->stats_in = logbuffer;
2699                     }
2700                 }
2701             }
2702         }
2703     }
2704
2705     /* open each encoder */
2706     for (i = 0; i < nb_output_streams; i++) {
2707         ost = output_streams[i];
2708         if (ost->encoding_needed) {
2709             AVCodec      *codec = ost->enc;
2710             AVCodecContext *dec = NULL;
2711
2712             if ((ist = get_input_stream(ost)))
2713                 dec = ist->st->codec;
2714             if (dec && dec->subtitle_header) {
2715                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
2716                 if (!ost->st->codec->subtitle_header) {
2717                     ret = AVERROR(ENOMEM);
2718                     goto dump_format;
2719                 }
2720                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
2721                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
2722             }
2723             if (!av_dict_get(ost->opts, "threads", NULL, 0))
2724                 av_dict_set(&ost->opts, "threads", "auto", 0);
2725             if (avcodec_open2(ost->st->codec, codec, &ost->opts) < 0) {
2726                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
2727                         ost->file_index, ost->index);
2728                 ret = AVERROR(EINVAL);
2729                 goto dump_format;
2730             }
2731             assert_codec_experimental(ost->st->codec, 1);
2732             assert_avoptions(ost->opts);
2733             if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
2734                 av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
2735                                              "It takes bits/s as argument, not kbits/s\n");
2736             extra_size += ost->st->codec->extradata_size;
2737
2738             if (ost->st->codec->me_threshold)
2739                 input_streams[ost->source_index]->st->codec->debug |= FF_DEBUG_MV;
2740         }
2741     }
2742
2743     /* init input streams */
2744     for (i = 0; i < nb_input_streams; i++)
2745         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
2746             goto dump_format;
2747
2748     /* discard unused programs */
2749     for (i = 0; i < nb_input_files; i++) {
2750         InputFile *ifile = input_files[i];
2751         for (j = 0; j < ifile->ctx->nb_programs; j++) {
2752             AVProgram *p = ifile->ctx->programs[j];
2753             int discard  = AVDISCARD_ALL;
2754
2755             for (k = 0; k < p->nb_stream_indexes; k++)
2756                 if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
2757                     discard = AVDISCARD_DEFAULT;
2758                     break;
2759                 }
2760             p->discard = discard;
2761         }
2762     }
2763
2764     /* open files and write file headers */
2765     for (i = 0; i < nb_output_files; i++) {
2766         oc = output_files[i]->ctx;
2767         oc->interrupt_callback = int_cb;
2768         if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
2769             char errbuf[128];
2770             const char *errbuf_ptr = errbuf;
2771             if (av_strerror(ret, errbuf, sizeof(errbuf)) < 0)
2772                 errbuf_ptr = strerror(AVUNERROR(ret));
2773             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?): %s", i, errbuf_ptr);
2774             ret = AVERROR(EINVAL);
2775             goto dump_format;
2776         }
2777         assert_avoptions(output_files[i]->opts);
2778         if (strcmp(oc->oformat->name, "rtp")) {
2779             want_sdp = 0;
2780         }
2781     }
2782
2783  dump_format:
2784     /* dump the file output parameters - cannot be done before in case
2785        of stream copy */
2786     for (i = 0; i < nb_output_files; i++) {
2787         av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
2788     }
2789
2790     /* dump the stream mapping */
2791     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
2792     for (i = 0; i < nb_input_streams; i++) {
2793         ist = input_streams[i];
2794
2795         for (j = 0; j < ist->nb_filters; j++) {
2796             if (ist->filters[j]->graph->graph_desc) {
2797                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
2798                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
2799                        ist->filters[j]->name);
2800                 if (nb_filtergraphs > 1)
2801                     av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
2802                 av_log(NULL, AV_LOG_INFO, "\n");
2803             }
2804         }
2805     }
2806
2807     for (i = 0; i < nb_output_streams; i++) {
2808         ost = output_streams[i];
2809
2810         if (ost->attachment_filename) {
2811             /* an attached file */
2812             av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
2813                    ost->attachment_filename, ost->file_index, ost->index);
2814             continue;
2815         }
2816
2817         if (ost->filter && ost->filter->graph->graph_desc) {
2818             /* output from a complex graph */
2819             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
2820             if (nb_filtergraphs > 1)
2821                 av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
2822
2823             av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
2824                    ost->index, ost->enc ? ost->enc->name : "?");
2825             continue;
2826         }
2827
2828         av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
2829                input_streams[ost->source_index]->file_index,
2830                input_streams[ost->source_index]->st->index,
2831                ost->file_index,
2832                ost->index);
2833         if (ost->sync_ist != input_streams[ost->source_index])
2834             av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
2835                    ost->sync_ist->file_index,
2836                    ost->sync_ist->st->index);
2837         if (ost->stream_copy)
2838             av_log(NULL, AV_LOG_INFO, " (copy)");
2839         else
2840             av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
2841                    input_streams[ost->source_index]->dec->name : "?",
2842                    ost->enc ? ost->enc->name : "?");
2843         av_log(NULL, AV_LOG_INFO, "\n");
2844     }
2845
2846     if (ret) {
2847         av_log(NULL, AV_LOG_ERROR, "%s\n", error);
2848         return ret;
2849     }
2850
2851     if (want_sdp) {
2852         print_sdp();
2853     }
2854
2855     return 0;
2856 }
2857
2858 /*
2859  * The following code is the main loop of the file converter
2860  */
2861 static int transcode(void)
2862 {
2863     int ret, i;
2864     AVFormatContext *is, *os;
2865     OutputStream *ost;
2866     InputStream *ist;
2867     uint8_t *no_packet;
2868     int no_packet_count = 0;
2869     int64_t timer_start;
2870
2871     if (!(no_packet = av_mallocz(nb_input_files)))
2872         exit_program(1);
2873
2874     ret = transcode_init();
2875     if (ret < 0)
2876         goto fail;
2877
2878     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
2879     term_init();
2880
2881     timer_start = av_gettime();
2882
2883     for (; received_sigterm == 0;) {
2884         int file_index, ist_index, past_recording_time = 1;
2885         AVPacket pkt;
2886         int64_t ipts_min;
2887
2888         ipts_min = INT64_MAX;
2889
2890         /* check if there's any stream where output is still needed */
2891         for (i = 0; i < nb_output_streams; i++) {
2892             OutputFile *of;
2893             ost = output_streams[i];
2894             of  = output_files[ost->file_index];
2895             os  = output_files[ost->file_index]->ctx;
2896             if (ost->is_past_recording_time ||
2897                 (os->pb && avio_tell(os->pb) >= of->limit_filesize))
2898                 continue;
2899             if (ost->frame_number > ost->max_frames) {
2900                 int j;
2901                 for (j = 0; j < of->ctx->nb_streams; j++)
2902                     output_streams[of->ost_index + j]->is_past_recording_time = 1;
2903                 continue;
2904             }
2905             past_recording_time = 0;
2906         }
2907         if (past_recording_time)
2908             break;
2909
2910         /* select the stream that we must read now by looking at the
2911            smallest output pts */
2912         file_index = -1;
2913         for (i = 0; i < nb_input_streams; i++) {
2914             int64_t ipts;
2915             ist = input_streams[i];
2916             ipts = ist->last_dts;
2917             if (ist->discard || no_packet[ist->file_index])
2918                 continue;
2919             if (!input_files[ist->file_index]->eof_reached) {
2920                 if (ipts < ipts_min) {
2921                     ipts_min = ipts;
2922                     file_index = ist->file_index;
2923                 }
2924             }
2925         }
2926         /* if none, if is finished */
2927         if (file_index < 0) {
2928             if (no_packet_count) {
2929                 no_packet_count = 0;
2930                 memset(no_packet, 0, nb_input_files);
2931                 usleep(10000);
2932                 continue;
2933             }
2934             break;
2935         }
2936
2937         /* read a frame from it and output it in the fifo */
2938         is  = input_files[file_index]->ctx;
2939         ret = av_read_frame(is, &pkt);
2940         if (ret == AVERROR(EAGAIN)) {
2941             no_packet[file_index] = 1;
2942             no_packet_count++;
2943             continue;
2944         }
2945         if (ret < 0) {
2946             input_files[file_index]->eof_reached = 1;
2947
2948             for (i = 0; i < input_files[file_index]->nb_streams; i++) {
2949                 ist = input_streams[input_files[file_index]->ist_index + i];
2950                 if (ist->decoding_needed)
2951                     output_packet(ist, NULL);
2952             }
2953
2954             if (opt_shortest)
2955                 break;
2956             else
2957                 continue;
2958         }
2959
2960         no_packet_count = 0;
2961         memset(no_packet, 0, nb_input_files);
2962
2963         if (do_pkt_dump) {
2964             av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
2965                              is->streams[pkt.stream_index]);
2966         }
2967         /* the following test is needed in case new streams appear
2968            dynamically in stream : we ignore them */
2969         if (pkt.stream_index >= input_files[file_index]->nb_streams)
2970             goto discard_packet;
2971         ist_index = input_files[file_index]->ist_index + pkt.stream_index;
2972         ist = input_streams[ist_index];
2973         if (ist->discard)
2974             goto discard_packet;
2975
2976         if (pkt.dts != AV_NOPTS_VALUE)
2977             pkt.dts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2978         if (pkt.pts != AV_NOPTS_VALUE)
2979             pkt.pts += av_rescale_q(input_files[ist->file_index]->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
2980
2981         if (pkt.pts != AV_NOPTS_VALUE)
2982             pkt.pts *= ist->ts_scale;
2983         if (pkt.dts != AV_NOPTS_VALUE)
2984             pkt.dts *= ist->ts_scale;
2985
2986         //fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n",
2987         //        ist->next_dts,
2988         //        pkt.dts, input_files[ist->file_index].ts_offset,
2989         //        ist->st->codec->codec_type);
2990         if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE
2991             && (is->iformat->flags & AVFMT_TS_DISCONT)) {
2992             int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
2993             int64_t delta   = pkt_dts - ist->next_dts;
2994             if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
2995                 input_files[ist->file_index]->ts_offset -= delta;
2996                 av_log(NULL, AV_LOG_DEBUG,
2997                        "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
2998                        delta, input_files[ist->file_index]->ts_offset);
2999                 pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3000                 if (pkt.pts != AV_NOPTS_VALUE)
3001                     pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
3002             }
3003         }
3004
3005         // fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->st->index, pkt.size);
3006         if (output_packet(ist, &pkt) < 0 || poll_filters() < 0) {
3007             av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
3008                    ist->file_index, ist->st->index);
3009             if (exit_on_error)
3010                 exit_program(1);
3011             av_free_packet(&pkt);
3012             continue;
3013         }
3014
3015     discard_packet:
3016         av_free_packet(&pkt);
3017
3018         /* dump report by using the output first video and audio streams */
3019         print_report(0, timer_start);
3020     }
3021
3022     /* at the end of stream, we must flush the decoder buffers */
3023     for (i = 0; i < nb_input_streams; i++) {
3024         ist = input_streams[i];
3025         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
3026             output_packet(ist, NULL);
3027         }
3028     }
3029     poll_filters();
3030     flush_encoders();
3031
3032     term_exit();
3033
3034     /* write the trailer if needed and close file */
3035     for (i = 0; i < nb_output_files; i++) {
3036         os = output_files[i]->ctx;
3037         av_write_trailer(os);
3038     }
3039
3040     /* dump report by using the first video and audio streams */
3041     print_report(1, timer_start);
3042
3043     /* close each encoder */
3044     for (i = 0; i < nb_output_streams; i++) {
3045         ost = output_streams[i];
3046         if (ost->encoding_needed) {
3047             av_freep(&ost->st->codec->stats_in);
3048             avcodec_close(ost->st->codec);
3049         }
3050     }
3051
3052     /* close each decoder */
3053     for (i = 0; i < nb_input_streams; i++) {
3054         ist = input_streams[i];
3055         if (ist->decoding_needed) {
3056             avcodec_close(ist->st->codec);
3057         }
3058     }
3059
3060     /* finished ! */
3061     ret = 0;
3062
3063  fail:
3064     av_freep(&no_packet);
3065
3066     if (output_streams) {
3067         for (i = 0; i < nb_output_streams; i++) {
3068             ost = output_streams[i];
3069             if (ost) {
3070                 if (ost->stream_copy)
3071                     av_freep(&ost->st->codec->extradata);
3072                 if (ost->logfile) {
3073                     fclose(ost->logfile);
3074                     ost->logfile = NULL;
3075                 }
3076                 av_freep(&ost->st->codec->subtitle_header);
3077                 av_free(ost->forced_kf_pts);
3078                 av_dict_free(&ost->opts);
3079             }
3080         }
3081     }
3082     return ret;
3083 }
3084
3085 static double parse_frame_aspect_ratio(const char *arg)
3086 {
3087     int x = 0, y = 0;
3088     double ar = 0;
3089     const char *p;
3090     char *end;
3091
3092     p = strchr(arg, ':');
3093     if (p) {
3094         x = strtol(arg, &end, 10);
3095         if (end == p)
3096             y = strtol(end + 1, &end, 10);
3097         if (x > 0 && y > 0)
3098             ar = (double)x / (double)y;
3099     } else
3100         ar = strtod(arg, NULL);
3101
3102     if (!ar) {
3103         av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
3104         exit_program(1);
3105     }
3106     return ar;
3107 }
3108
3109 static int opt_audio_codec(OptionsContext *o, const char *opt, const char *arg)
3110 {
3111     return parse_option(o, "codec:a", arg, options);
3112 }
3113
3114 static int opt_video_codec(OptionsContext *o, const char *opt, const char *arg)
3115 {
3116     return parse_option(o, "codec:v", arg, options);
3117 }
3118
3119 static int opt_subtitle_codec(OptionsContext *o, const char *opt, const char *arg)
3120 {
3121     return parse_option(o, "codec:s", arg, options);
3122 }
3123
3124 static int opt_data_codec(OptionsContext *o, const char *opt, const char *arg)
3125 {
3126     return parse_option(o, "codec:d", arg, options);
3127 }
3128
3129 static int opt_map(OptionsContext *o, const char *opt, const char *arg)
3130 {
3131     StreamMap *m = NULL;
3132     int i, negative = 0, file_idx;
3133     int sync_file_idx = -1, sync_stream_idx;
3134     char *p, *sync;
3135     char *map;
3136
3137     if (*arg == '-') {
3138         negative = 1;
3139         arg++;
3140     }
3141     map = av_strdup(arg);
3142
3143     /* parse sync stream first, just pick first matching stream */
3144     if (sync = strchr(map, ',')) {
3145         *sync = 0;
3146         sync_file_idx = strtol(sync + 1, &sync, 0);
3147         if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
3148             av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
3149             exit_program(1);
3150         }
3151         if (*sync)
3152             sync++;
3153         for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
3154             if (check_stream_specifier(input_files[sync_file_idx]->ctx,
3155                                        input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
3156                 sync_stream_idx = i;
3157                 break;
3158             }
3159         if (i == input_files[sync_file_idx]->nb_streams) {
3160             av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
3161                                        "match any streams.\n", arg);
3162             exit_program(1);
3163         }
3164     }
3165
3166
3167     if (map[0] == '[') {
3168         /* this mapping refers to lavfi output */
3169         const char *c = map + 1;
3170         o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3171                                     &o->nb_stream_maps, o->nb_stream_maps + 1);
3172         m = &o->stream_maps[o->nb_stream_maps - 1];
3173         m->linklabel = av_get_token(&c, "]");
3174         if (!m->linklabel) {
3175             av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
3176             exit_program(1);
3177         }
3178     } else {
3179         file_idx = strtol(map, &p, 0);
3180         if (file_idx >= nb_input_files || file_idx < 0) {
3181             av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
3182             exit_program(1);
3183         }
3184         if (negative)
3185             /* disable some already defined maps */
3186             for (i = 0; i < o->nb_stream_maps; i++) {
3187                 m = &o->stream_maps[i];
3188                 if (file_idx == m->file_index &&
3189                     check_stream_specifier(input_files[m->file_index]->ctx,
3190                                            input_files[m->file_index]->ctx->streams[m->stream_index],
3191                                            *p == ':' ? p + 1 : p) > 0)
3192                     m->disabled = 1;
3193             }
3194         else
3195             for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
3196                 if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
3197                             *p == ':' ? p + 1 : p) <= 0)
3198                     continue;
3199                 o->stream_maps = grow_array(o->stream_maps, sizeof(*o->stream_maps),
3200                                             &o->nb_stream_maps, o->nb_stream_maps + 1);
3201                 m = &o->stream_maps[o->nb_stream_maps - 1];
3202
3203                 m->file_index   = file_idx;
3204                 m->stream_index = i;
3205
3206                 if (sync_file_idx >= 0) {
3207                     m->sync_file_index   = sync_file_idx;
3208                     m->sync_stream_index = sync_stream_idx;
3209                 } else {
3210                     m->sync_file_index   = file_idx;
3211                     m->sync_stream_index = i;
3212                 }
3213             }
3214     }
3215
3216     if (!m) {
3217         av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
3218         exit_program(1);
3219     }
3220
3221     av_freep(&map);
3222     return 0;
3223 }
3224
3225 static int opt_attach(OptionsContext *o, const char *opt, const char *arg)
3226 {
3227     o->attachments = grow_array(o->attachments, sizeof(*o->attachments),
3228                                 &o->nb_attachments, o->nb_attachments + 1);
3229     o->attachments[o->nb_attachments - 1] = arg;
3230     return 0;
3231 }
3232
3233 /**
3234  * Parse a metadata specifier in arg.
3235  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
3236  * @param index for type c/p, chapter/program index is written here
3237  * @param stream_spec for type s, the stream specifier is written here
3238  */
3239 static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
3240 {
3241     if (*arg) {
3242         *type = *arg;
3243         switch (*arg) {
3244         case 'g':
3245             break;
3246         case 's':
3247             if (*(++arg) && *arg != ':') {
3248                 av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
3249                 exit_program(1);
3250             }
3251             *stream_spec = *arg == ':' ? arg + 1 : "";
3252             break;
3253         case 'c':
3254         case 'p':
3255             if (*(++arg) == ':')
3256                 *index = strtol(++arg, NULL, 0);
3257             break;
3258         default:
3259             av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
3260             exit_program(1);
3261         }
3262     } else
3263         *type = 'g';
3264 }
3265
3266 static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
3267 {
3268     AVDictionary **meta_in = NULL;
3269     AVDictionary **meta_out;
3270     int i, ret = 0;
3271     char type_in, type_out;
3272     const char *istream_spec = NULL, *ostream_spec = NULL;
3273     int idx_in = 0, idx_out = 0;
3274
3275     parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
3276     parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
3277
3278     if (type_in == 'g' || type_out == 'g')
3279         o->metadata_global_manual = 1;
3280     if (type_in == 's' || type_out == 's')
3281         o->metadata_streams_manual = 1;
3282     if (type_in == 'c' || type_out == 'c')
3283         o->metadata_chapters_manual = 1;
3284
3285 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
3286     if ((index) < 0 || (index) >= (nb_elems)) {\
3287         av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
3288                 (desc), (index));\
3289         exit_program(1);\
3290     }
3291
3292 #define SET_DICT(type, meta, context, index)\
3293         switch (type) {\
3294         case 'g':\
3295             meta = &context->metadata;\
3296             break;\
3297         case 'c':\
3298             METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
3299             meta = &context->chapters[index]->metadata;\
3300             break;\
3301         case 'p':\
3302             METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
3303             meta = &context->programs[index]->metadata;\
3304             break;\
3305         }\
3306
3307     SET_DICT(type_in, meta_in, ic, idx_in);
3308     SET_DICT(type_out, meta_out, oc, idx_out);
3309
3310     /* for input streams choose first matching stream */
3311     if (type_in == 's') {
3312         for (i = 0; i < ic->nb_streams; i++) {
3313             if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
3314                 meta_in = &ic->streams[i]->metadata;
3315                 break;
3316             } else if (ret < 0)
3317                 exit_program(1);
3318         }
3319         if (!meta_in) {
3320             av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
3321             exit_program(1);
3322         }
3323     }
3324
3325     if (type_out == 's') {
3326         for (i = 0; i < oc->nb_streams; i++) {
3327             if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
3328                 meta_out = &oc->streams[i]->metadata;
3329                 av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3330             } else if (ret < 0)
3331                 exit_program(1);
3332         }
3333     } else
3334         av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
3335
3336     return 0;
3337 }
3338
3339 static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
3340 {
3341     const char *codec_string = encoder ? "encoder" : "decoder";
3342     AVCodec *codec;
3343
3344     codec = encoder ?
3345         avcodec_find_encoder_by_name(name) :
3346         avcodec_find_decoder_by_name(name);
3347     if (!codec) {
3348         av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
3349         exit_program(1);
3350     }
3351     if (codec->type != type) {
3352         av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
3353         exit_program(1);
3354     }
3355     return codec;
3356 }
3357
3358 static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
3359 {
3360     char *codec_name = NULL;
3361
3362     MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
3363     if (codec_name) {
3364         AVCodec *codec = find_codec_or_die(codec_name, st->codec->codec_type, 0);
3365         st->codec->codec_id = codec->id;
3366         return codec;
3367     } else
3368         return avcodec_find_decoder(st->codec->codec_id);
3369 }
3370
3371 /**
3372  * Add all the streams from the given input file to the global
3373  * list of input streams.
3374  */
3375 static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
3376 {
3377     int i;
3378
3379     for (i = 0; i < ic->nb_streams; i++) {
3380         AVStream *st = ic->streams[i];
3381         AVCodecContext *dec = st->codec;
3382         InputStream *ist = av_mallocz(sizeof(*ist));
3383         char *framerate = NULL;
3384
3385         if (!ist)
3386             exit_program(1);
3387
3388         input_streams = grow_array(input_streams, sizeof(*input_streams), &nb_input_streams, nb_input_streams + 1);
3389         input_streams[nb_input_streams - 1] = ist;
3390
3391         ist->st = st;
3392         ist->file_index = nb_input_files;
3393         ist->discard = 1;
3394         st->discard  = AVDISCARD_ALL;
3395         ist->opts = filter_codec_opts(codec_opts, ist->st->codec->codec_id, ic, st);
3396
3397         ist->ts_scale = 1.0;
3398         MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
3399
3400         ist->dec = choose_decoder(o, ic, st);
3401
3402         switch (dec->codec_type) {
3403         case AVMEDIA_TYPE_VIDEO:
3404             ist->resample_height  = dec->height;
3405             ist->resample_width   = dec->width;
3406             ist->resample_pix_fmt = dec->pix_fmt;
3407
3408             MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
3409             if (framerate && av_parse_video_rate(&ist->framerate,
3410                                                  framerate) < 0) {
3411                 av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
3412                        framerate);
3413                 exit_program(1);
3414             }
3415
3416             break;
3417         case AVMEDIA_TYPE_AUDIO:
3418             guess_input_channel_layout(ist);
3419
3420             ist->resample_sample_fmt     = dec->sample_fmt;
3421             ist->resample_sample_rate    = dec->sample_rate;
3422             ist->resample_channels       = dec->channels;
3423             ist->resample_channel_layout = dec->channel_layout;
3424
3425             break;
3426         case AVMEDIA_TYPE_DATA:
3427         case AVMEDIA_TYPE_SUBTITLE:
3428         case AVMEDIA_TYPE_ATTACHMENT:
3429         case AVMEDIA_TYPE_UNKNOWN:
3430             break;
3431         default:
3432             abort();
3433         }
3434     }
3435 }
3436
3437 static void assert_file_overwrite(const char *filename)
3438 {
3439     if (!file_overwrite &&
3440         (strchr(filename, ':') == NULL || filename[1] == ':' ||
3441          av_strstart(filename, "file:", NULL))) {
3442         if (avio_check(filename, 0) == 0) {
3443             if (!using_stdin) {
3444                 fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
3445                 fflush(stderr);
3446                 if (!read_yesno()) {
3447                     fprintf(stderr, "Not overwriting - exiting\n");
3448                     exit_program(1);
3449                 }
3450             }
3451             else {
3452                 fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
3453                 exit_program(1);
3454             }
3455         }
3456     }
3457 }
3458
3459 static void dump_attachment(AVStream *st, const char *filename)
3460 {
3461     int ret;
3462     AVIOContext *out = NULL;
3463     AVDictionaryEntry *e;
3464
3465     if (!st->codec->extradata_size) {
3466         av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
3467                nb_input_files - 1, st->index);
3468         return;
3469     }
3470     if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
3471         filename = e->value;
3472     if (!*filename) {
3473         av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
3474                "in stream #%d:%d.\n", nb_input_files - 1, st->index);
3475         exit_program(1);
3476     }
3477
3478     assert_file_overwrite(filename);
3479
3480     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
3481         av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
3482                filename);
3483         exit_program(1);
3484     }
3485
3486     avio_write(out, st->codec->extradata, st->codec->extradata_size);
3487     avio_flush(out);
3488     avio_close(out);
3489 }
3490
3491 static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
3492 {
3493     AVFormatContext *ic;
3494     AVInputFormat *file_iformat = NULL;
3495     int err, i, ret;
3496     int64_t timestamp;
3497     uint8_t buf[128];
3498     AVDictionary **opts;
3499     int orig_nb_streams;                     // number of streams before avformat_find_stream_info
3500
3501     if (o->format) {
3502         if (!(file_iformat = av_find_input_format(o->format))) {
3503             av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
3504             exit_program(1);
3505         }
3506     }
3507
3508     if (!strcmp(filename, "-"))
3509         filename = "pipe:";
3510
3511     using_stdin |= !strncmp(filename, "pipe:", 5) ||
3512                     !strcmp(filename, "/dev/stdin");
3513
3514     /* get default parameters from command line */
3515     ic = avformat_alloc_context();
3516     if (!ic) {
3517         print_error(filename, AVERROR(ENOMEM));
3518         exit_program(1);
3519     }
3520     if (o->nb_audio_sample_rate) {
3521         snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
3522         av_dict_set(&format_opts, "sample_rate", buf, 0);
3523     }
3524     if (o->nb_audio_channels) {
3525         /* because we set audio_channels based on both the "ac" and
3526          * "channel_layout" options, we need to check that the specified
3527          * demuxer actually has the "channels" option before setting it */
3528         if (file_iformat && file_iformat->priv_class &&
3529             av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
3530                         AV_OPT_SEARCH_FAKE_OBJ)) {
3531             snprintf(buf, sizeof(buf), "%d",
3532                      o->audio_channels[o->nb_audio_channels - 1].u.i);
3533             av_dict_set(&format_opts, "channels", buf, 0);
3534         }
3535     }
3536     if (o->nb_frame_rates) {
3537         /* set the format-level framerate option;
3538          * this is important for video grabbers, e.g. x11 */
3539         if (file_iformat && file_iformat->priv_class &&
3540             av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
3541                         AV_OPT_SEARCH_FAKE_OBJ)) {
3542             av_dict_set(&format_opts, "framerate",
3543                         o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
3544         }
3545     }
3546     if (o->nb_frame_sizes) {
3547         av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
3548     }
3549     if (o->nb_frame_pix_fmts)
3550         av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
3551
3552     ic->flags |= AVFMT_FLAG_NONBLOCK;
3553     ic->interrupt_callback = int_cb;
3554
3555     /* open the input file with generic libav function */
3556     err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
3557     if (err < 0) {
3558         print_error(filename, err);
3559         exit_program(1);
3560     }
3561     assert_avoptions(format_opts);
3562
3563     /* apply forced codec ids */
3564     for (i = 0; i < ic->nb_streams; i++)
3565         choose_decoder(o, ic, ic->streams[i]);
3566
3567     /* Set AVCodecContext options for avformat_find_stream_info */
3568     opts = setup_find_stream_info_opts(ic, codec_opts);
3569     orig_nb_streams = ic->nb_streams;
3570
3571     /* If not enough info to get the stream parameters, we decode the
3572        first frames to get it. (used in mpeg case for example) */
3573     ret = avformat_find_stream_info(ic, opts);
3574     if (ret < 0) {
3575         av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
3576         avformat_close_input(&ic);
3577         exit_program(1);
3578     }
3579
3580     timestamp = o->start_time;
3581     /* add the stream start time */
3582     if (ic->start_time != AV_NOPTS_VALUE)
3583         timestamp += ic->start_time;
3584
3585     /* if seeking requested, we execute it */
3586     if (o->start_time != 0) {
3587         ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
3588         if (ret < 0) {
3589             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
3590                    filename, (double)timestamp / AV_TIME_BASE);
3591         }
3592     }
3593
3594     /* update the current parameters so that they match the one of the input stream */
3595     add_input_streams(o, ic);
3596
3597     /* dump the file content */
3598     av_dump_format(ic, nb_input_files, filename, 0);
3599
3600     input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1);
3601     if (!(input_files[nb_input_files - 1] = av_mallocz(sizeof(*input_files[0]))))
3602         exit_program(1);
3603
3604     input_files[nb_input_files - 1]->ctx        = ic;
3605     input_files[nb_input_files - 1]->ist_index  = nb_input_streams - ic->nb_streams;
3606     input_files[nb_input_files - 1]->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
3607     input_files[nb_input_files - 1]->nb_streams = ic->nb_streams;
3608     input_files[nb_input_files - 1]->rate_emu   = o->rate_emu;
3609
3610     for (i = 0; i < o->nb_dump_attachment; i++) {
3611         int j;
3612
3613         for (j = 0; j < ic->nb_streams; j++) {
3614             AVStream *st = ic->streams[j];
3615
3616             if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
3617                 dump_attachment(st, o->dump_attachment[i].u.str);
3618         }
3619     }
3620
3621     for (i = 0; i < orig_nb_streams; i++)
3622         av_dict_free(&opts[i]);
3623     av_freep(&opts);
3624
3625     reset_options(o);
3626     return 0;
3627 }
3628
3629 static void parse_forced_key_frames(char *kf, OutputStream *ost,
3630                                     AVCodecContext *avctx)
3631 {
3632     char *p;
3633     int n = 1, i;
3634     int64_t t;
3635
3636     for (p = kf; *p; p++)
3637         if (*p == ',')
3638             n++;
3639     ost->forced_kf_count = n;
3640     ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
3641     if (!ost->forced_kf_pts) {
3642         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
3643         exit_program(1);
3644     }
3645     for (i = 0; i < n; i++) {
3646         p = i ? strchr(p, ',') + 1 : kf;
3647         t = parse_time_or_die("force_key_frames", p, 1);
3648         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
3649     }
3650 }
3651
3652 static uint8_t *get_line(AVIOContext *s)
3653 {
3654     AVIOContext *line;
3655     uint8_t *buf;
3656     char c;
3657
3658     if (avio_open_dyn_buf(&line) < 0) {
3659         av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
3660         exit_program(1);
3661     }
3662
3663     while ((c = avio_r8(s)) && c != '\n')
3664         avio_w8(line, c);
3665     avio_w8(line, 0);
3666     avio_close_dyn_buf(line, &buf);
3667
3668     return buf;
3669 }
3670
3671 static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
3672 {
3673     int i, ret = 1;
3674     char filename[1000];
3675     const char *base[3] = { getenv("AVCONV_DATADIR"),
3676                             getenv("HOME"),
3677                             AVCONV_DATADIR,
3678                             };
3679
3680     for (i = 0; i < FF_ARRAY_ELEMS(base) && ret; i++) {
3681         if (!base[i])
3682             continue;
3683         if (codec_name) {
3684             snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
3685                      i != 1 ? "" : "/.avconv", codec_name, preset_name);
3686             ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
3687         }
3688         if (ret) {
3689             snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
3690                      i != 1 ? "" : "/.avconv", preset_name);