Merge commit 'fcf597625c7a991ca389f3a9b8ff4f5e383301c0'
[ffmpeg.git] / tools / ismindex.c
1 /*
2  * Copyright (c) 2012 Martin Storsjo
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /*
22  * To create a simple file for smooth streaming:
23  * ffmpeg <normal input/transcoding options> -movflags frag_keyframe foo.ismv
24  * ismindex -n foo foo.ismv
25  * This step creates foo.ism and foo.ismc that is required by IIS for
26  * serving it.
27  *
28  * With -ismf, it also creates foo.ismf, which maps fragment names to
29  * start-end offsets in the ismv, for use in your own streaming server.
30  *
31  * By adding -path-prefix path/, the produced foo.ism will refer to the
32  * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
33  * file can be set with the -ismc-prefix option similarly.
34  *
35  * To pre-split files for serving as static files by a web server without
36  * any extra server support, create the ismv file as above, and split it:
37  * ismindex -split foo.ismv
38  * This step creates a file Manifest and directories QualityLevel(...),
39  * that can be read directly by a smooth streaming player.
40  *
41  * The -output dir option can be used to request that output files
42  * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
43  * should be written to this directory instead of in the current directory.
44  * (The directory itself isn't created if it doesn't already exist.)
45  */
46
47 #include <stdio.h>
48 #include <string.h>
49
50 #include "cmdutils.h"
51
52 #include "libavformat/avformat.h"
53 #include "libavformat/os_support.h"
54 #include "libavutil/intreadwrite.h"
55 #include "libavutil/mathematics.h"
56
57 static int usage(const char *argv0, int ret)
58 {
59     fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
60                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
61     return ret;
62 }
63
64 struct MoofOffset {
65     int64_t time;
66     int64_t offset;
67     int64_t duration;
68 };
69
70 struct Track {
71     const char *name;
72     int64_t duration;
73     int bitrate;
74     int track_id;
75     int is_audio, is_video;
76     int width, height;
77     int chunks;
78     int sample_rate, channels;
79     uint8_t *codec_private;
80     int codec_private_size;
81     struct MoofOffset *offsets;
82     int timescale;
83     const char *fourcc;
84     int blocksize;
85     int tag;
86 };
87
88 struct Tracks {
89     int nb_tracks;
90     int64_t duration;
91     struct Track **tracks;
92     int video_track, audio_track;
93     int nb_video_tracks, nb_audio_tracks;
94 };
95
96 static int expect_tag(int32_t got_tag, int32_t expected_tag) {
97     if (got_tag != expected_tag) {
98         char got_tag_str[4], expected_tag_str[4];
99         AV_WB32(got_tag_str, got_tag);
100         AV_WB32(expected_tag_str, expected_tag);
101         fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
102                 got_tag_str);
103         return -1;
104     }
105     return 0;
106 }
107
108 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
109 {
110     int32_t size, tag;
111
112     size = avio_rb32(in);
113     tag  = avio_rb32(in);
114     avio_wb32(out, size);
115     avio_wb32(out, tag);
116     if (expect_tag(tag, tag_name) != 0)
117         return -1;
118     size -= 8;
119     while (size > 0) {
120         char buf[1024];
121         int len = FFMIN(sizeof(buf), size);
122         int got;
123         if ((got = avio_read(in, buf, len)) != len) {
124             fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
125             break;
126         }
127         avio_write(out, buf, len);
128         size -= len;
129     }
130     return 0;
131 }
132
133 static int skip_tag(AVIOContext *in, int32_t tag_name)
134 {
135     int64_t pos = avio_tell(in);
136     int32_t size, tag;
137
138     size = avio_rb32(in);
139     tag  = avio_rb32(in);
140     if (expect_tag(tag, tag_name) != 0)
141         return -1;
142     avio_seek(in, pos + size, SEEK_SET);
143     return 0;
144 }
145
146 static int write_fragment(const char *filename, AVIOContext *in)
147 {
148     AVIOContext *out = NULL;
149     int ret;
150
151     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
152         char errbuf[100];
153         av_strerror(ret, errbuf, sizeof(errbuf));
154         fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
155         return ret;
156     }
157     ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
158     if (!ret)
159         ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
160
161     avio_flush(out);
162     avio_close(out);
163
164     return ret;
165 }
166
167 static int skip_fragment(AVIOContext *in)
168 {
169     int ret;
170     ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
171     if (!ret)
172         ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
173     return ret;
174 }
175
176 static int write_fragments(struct Tracks *tracks, int start_index,
177                            AVIOContext *in, const char *basename,
178                            int split, int ismf, const char* output_prefix)
179 {
180     char dirname[2048], filename[2048], idxname[2048];
181     int i, j, ret = 0, fragment_ret;
182     FILE* out = NULL;
183
184     if (ismf) {
185         snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
186         out = fopen(idxname, "w");
187         if (!out) {
188             ret = AVERROR(errno);
189             perror(idxname);
190             goto fail;
191         }
192     }
193     for (i = start_index; i < tracks->nb_tracks; i++) {
194         struct Track *track = tracks->tracks[i];
195         const char *type    = track->is_video ? "video" : "audio";
196         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
197         if (split) {
198             if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
199                 ret = AVERROR(errno);
200                 perror(dirname);
201                 goto fail;
202             }
203         }
204         for (j = 0; j < track->chunks; j++) {
205             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
206                      dirname, type, track->offsets[j].time);
207             avio_seek(in, track->offsets[j].offset, SEEK_SET);
208             if (ismf)
209                 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
210             if (split)
211                 fragment_ret = write_fragment(filename, in);
212             else
213                 fragment_ret = skip_fragment(in);
214             if (ismf)
215                 fprintf(out, " %"PRId64"\n", avio_tell(in));
216             if (fragment_ret != 0) {
217                 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
218                         track->track_id, track->name);
219                 ret = fragment_ret;
220             }
221         }
222     }
223 fail:
224     if (out)
225         fclose(out);
226     return ret;
227 }
228
229 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
230 {
231     int ret = AVERROR_EOF, track_id;
232     int version, fieldlength, i, j;
233     int64_t pos   = avio_tell(f);
234     uint32_t size = avio_rb32(f);
235     struct Track *track = NULL;
236
237     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
238         goto fail;
239     version = avio_r8(f);
240     avio_rb24(f);
241     track_id = avio_rb32(f); /* track id */
242     for (i = start_index; i < tracks->nb_tracks && !track; i++)
243         if (tracks->tracks[i]->track_id == track_id)
244             track = tracks->tracks[i];
245     if (!track) {
246         /* Ok, continue parsing the next atom */
247         ret = 0;
248         goto fail;
249     }
250     fieldlength = avio_rb32(f);
251     track->chunks  = avio_rb32(f);
252     track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
253     if (!track->offsets) {
254         ret = AVERROR(ENOMEM);
255         goto fail;
256     }
257     for (i = 0; i < track->chunks; i++) {
258         if (version == 1) {
259             track->offsets[i].time   = avio_rb64(f);
260             track->offsets[i].offset = avio_rb64(f);
261         } else {
262             track->offsets[i].time   = avio_rb32(f);
263             track->offsets[i].offset = avio_rb32(f);
264         }
265         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
266             avio_r8(f);
267         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
268             avio_r8(f);
269         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
270             avio_r8(f);
271         if (i > 0)
272             track->offsets[i - 1].duration = track->offsets[i].time -
273                                              track->offsets[i - 1].time;
274     }
275     if (track->chunks > 0)
276         track->offsets[track->chunks - 1].duration = track->duration -
277                                                      track->offsets[track->chunks - 1].time;
278     ret = 0;
279
280 fail:
281     avio_seek(f, pos + size, SEEK_SET);
282     return ret;
283 }
284
285 static int read_mfra(struct Tracks *tracks, int start_index,
286                      const char *file, int split, int ismf,
287                      const char *basename, const char* output_prefix)
288 {
289     int err = 0;
290     const char* err_str = "";
291     AVIOContext *f = NULL;
292     int32_t mfra_size;
293
294     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
295         goto fail;
296     avio_seek(f, avio_size(f) - 4, SEEK_SET);
297     mfra_size = avio_rb32(f);
298     avio_seek(f, -mfra_size, SEEK_CUR);
299     if (avio_rb32(f) != mfra_size) {
300         err = AVERROR_INVALIDDATA;
301         err_str = "mfra size mismatch";
302         goto fail;
303     }
304     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
305         err = AVERROR_INVALIDDATA;
306         err_str = "mfra tag mismatch";
307         goto fail;
308     }
309     while (!read_tfra(tracks, start_index, f)) {
310         /* Empty */
311     }
312
313     if (split || ismf)
314         err = write_fragments(tracks, start_index, f, basename, split, ismf,
315                               output_prefix);
316     err_str = "error in write_fragments";
317
318 fail:
319     if (f)
320         avio_close(f);
321     if (err)
322         fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
323     return err;
324 }
325
326 static int get_private_data(struct Track *track, AVCodecContext *codec)
327 {
328     track->codec_private_size = codec->extradata_size;
329     track->codec_private      = av_mallocz(codec->extradata_size);
330     if (!track->codec_private)
331         return AVERROR(ENOMEM);
332     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
333     return 0;
334 }
335
336 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
337 {
338     AVIOContext *io = NULL;
339     uint16_t sps_size, pps_size;
340     int err;
341
342     if (codec->codec_id == AV_CODEC_ID_VC1)
343         return get_private_data(track, codec);
344
345     if ((err = avio_open_dyn_buf(&io)) < 0)
346         goto fail;
347     err = AVERROR(EINVAL);
348     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
349         goto fail;
350     sps_size = AV_RB16(&codec->extradata[6]);
351     if (11 + sps_size > codec->extradata_size)
352         goto fail;
353     avio_wb32(io, 0x00000001);
354     avio_write(io, &codec->extradata[8], sps_size);
355     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
356     if (11 + sps_size + pps_size > codec->extradata_size)
357         goto fail;
358     avio_wb32(io, 0x00000001);
359     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
360     err = 0;
361
362 fail:
363     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
364     return err;
365 }
366
367 static int handle_file(struct Tracks *tracks, const char *file, int split,
368                        int ismf, const char *basename,
369                        const char* output_prefix)
370 {
371     AVFormatContext *ctx = NULL;
372     int err = 0, i, orig_tracks = tracks->nb_tracks;
373     char errbuf[50], *ptr;
374     struct Track *track;
375
376     err = avformat_open_input(&ctx, file, NULL, NULL);
377     if (err < 0) {
378         av_strerror(err, errbuf, sizeof(errbuf));
379         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
380         return 1;
381     }
382
383     err = avformat_find_stream_info(ctx, NULL);
384     if (err < 0) {
385         av_strerror(err, errbuf, sizeof(errbuf));
386         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
387         goto fail;
388     }
389
390     if (ctx->nb_streams < 1) {
391         fprintf(stderr, "No streams found in %s\n", file);
392         goto fail;
393     }
394
395     for (i = 0; i < ctx->nb_streams; i++) {
396         struct Track **temp;
397         AVStream *st = ctx->streams[i];
398
399         if (st->codec->bit_rate == 0) {
400             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
401                     st->id, file);
402             continue;
403         }
404
405         track = av_mallocz(sizeof(*track));
406         if (!track) {
407             err = AVERROR(ENOMEM);
408             goto fail;
409         }
410         temp = av_realloc(tracks->tracks,
411                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
412         if (!temp) {
413             av_free(track);
414             err = AVERROR(ENOMEM);
415             goto fail;
416         }
417         tracks->tracks = temp;
418         tracks->tracks[tracks->nb_tracks] = track;
419
420         track->name = file;
421         if ((ptr = strrchr(file, '/')))
422             track->name = ptr + 1;
423
424         track->bitrate   = st->codec->bit_rate;
425         track->track_id  = st->id;
426         track->timescale = st->time_base.den;
427         track->duration  = st->duration;
428         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
429         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
430
431         if (!track->is_audio && !track->is_video) {
432             fprintf(stderr,
433                     "Track %d in %s is neither video nor audio, skipping\n",
434                     track->track_id, file);
435             av_freep(&tracks->tracks[tracks->nb_tracks]);
436             continue;
437         }
438
439         tracks->duration = FFMAX(tracks->duration,
440                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
441                                                 track->timescale, AV_ROUND_UP));
442
443         if (track->is_audio) {
444             if (tracks->audio_track < 0)
445                 tracks->audio_track = tracks->nb_tracks;
446             tracks->nb_audio_tracks++;
447             track->channels    = st->codec->channels;
448             track->sample_rate = st->codec->sample_rate;
449             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
450                 track->fourcc    = "AACL";
451                 track->tag       = 255;
452                 track->blocksize = 4;
453             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
454                 track->fourcc    = "WMAP";
455                 track->tag       = st->codec->codec_tag;
456                 track->blocksize = st->codec->block_align;
457             }
458             get_private_data(track, st->codec);
459         }
460         if (track->is_video) {
461             if (tracks->video_track < 0)
462                 tracks->video_track = tracks->nb_tracks;
463             tracks->nb_video_tracks++;
464             track->width  = st->codec->width;
465             track->height = st->codec->height;
466             if (st->codec->codec_id == AV_CODEC_ID_H264)
467                 track->fourcc = "H264";
468             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
469                 track->fourcc = "WVC1";
470             get_video_private_data(track, st->codec);
471         }
472
473         tracks->nb_tracks++;
474     }
475
476     avformat_close_input(&ctx);
477
478     err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
479                     output_prefix);
480
481 fail:
482     if (ctx)
483         avformat_close_input(&ctx);
484     return err;
485 }
486
487 static void output_server_manifest(struct Tracks *tracks, const char *basename,
488                                    const char *output_prefix,
489                                    const char *path_prefix,
490                                    const char *ismc_prefix)
491 {
492     char filename[1000];
493     FILE *out;
494     int i;
495
496     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
497     out = fopen(filename, "w");
498     if (!out) {
499         perror(filename);
500         return;
501     }
502     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
503     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
504     fprintf(out, "\t<head>\n");
505     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
506                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
507     fprintf(out, "\t</head>\n");
508     fprintf(out, "\t<body>\n");
509     fprintf(out, "\t\t<switch>\n");
510     for (i = 0; i < tracks->nb_tracks; i++) {
511         struct Track *track = tracks->tracks[i];
512         const char *type    = track->is_video ? "video" : "audio";
513         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
514                 type, path_prefix, track->name, track->bitrate);
515         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
516                      "valueType=\"data\" />\n", track->track_id);
517         fprintf(out, "\t\t\t</%s>\n", type);
518     }
519     fprintf(out, "\t\t</switch>\n");
520     fprintf(out, "\t</body>\n");
521     fprintf(out, "</smil>\n");
522     fclose(out);
523 }
524
525 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
526                                const char *type)
527 {
528     int i, j;
529     struct Track *track = tracks->tracks[main];
530     int should_print_time_mismatch = 1;
531
532     for (i = 0; i < track->chunks; i++) {
533         for (j = main + 1; j < tracks->nb_tracks; j++) {
534             if (tracks->tracks[j]->is_audio == track->is_audio) {
535                 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
536                     fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
537                             type, i, track->name, main, tracks->tracks[j]->name, j);
538                     should_print_time_mismatch = 1;
539                 }
540                 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
541                     if (should_print_time_mismatch)
542                         fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
543                                 type, i, track->name, main, tracks->tracks[j]->name, j);
544                     should_print_time_mismatch = 0;
545                 }
546             }
547         }
548         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
549                 i, track->offsets[i].duration);
550     }
551 }
552
553 static void output_client_manifest(struct Tracks *tracks, const char *basename,
554                                    const char *output_prefix, int split)
555 {
556     char filename[1000];
557     FILE *out;
558     int i, j;
559
560     if (split)
561         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
562     else
563         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
564     out = fopen(filename, "w");
565     if (!out) {
566         perror(filename);
567         return;
568     }
569     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
570     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
571                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
572     if (tracks->video_track >= 0) {
573         struct Track *track = tracks->tracks[tracks->video_track];
574         struct Track *first_track = track;
575         int index = 0;
576         fprintf(out,
577                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
578                 "Chunks=\"%d\" "
579                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
580                 tracks->nb_video_tracks, track->chunks);
581         for (i = 0; i < tracks->nb_tracks; i++) {
582             track = tracks->tracks[i];
583             if (!track->is_video)
584                 continue;
585             fprintf(out,
586                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
587                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
588                     "CodecPrivateData=\"",
589                     index, track->bitrate, track->fourcc, track->width, track->height);
590             for (j = 0; j < track->codec_private_size; j++)
591                 fprintf(out, "%02X", track->codec_private[j]);
592             fprintf(out, "\" />\n");
593             index++;
594             if (track->chunks != first_track->chunks)
595                 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
596                         track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
597         }
598         print_track_chunks(out, tracks, tracks->video_track, "video");
599         fprintf(out, "\t</StreamIndex>\n");
600     }
601     if (tracks->audio_track >= 0) {
602         struct Track *track = tracks->tracks[tracks->audio_track];
603         struct Track *first_track = track;
604         int index = 0;
605         fprintf(out,
606                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
607                 "Chunks=\"%d\" "
608                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
609                 tracks->nb_audio_tracks, track->chunks);
610         for (i = 0; i < tracks->nb_tracks; i++) {
611             track = tracks->tracks[i];
612             if (!track->is_audio)
613                 continue;
614             fprintf(out,
615                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
616                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
617                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
618                     "AudioTag=\"%d\" CodecPrivateData=\"",
619                     index, track->bitrate, track->fourcc, track->sample_rate,
620                     track->channels, track->blocksize, track->tag);
621             for (j = 0; j < track->codec_private_size; j++)
622                 fprintf(out, "%02X", track->codec_private[j]);
623             fprintf(out, "\" />\n");
624             index++;
625             if (track->chunks != first_track->chunks)
626                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
627                         track->name, first_track->name);
628         }
629         print_track_chunks(out, tracks, tracks->audio_track, "audio");
630         fprintf(out, "\t</StreamIndex>\n");
631     }
632     fprintf(out, "</SmoothStreamingMedia>\n");
633     fclose(out);
634 }
635
636 static void clean_tracks(struct Tracks *tracks)
637 {
638     int i;
639     for (i = 0; i < tracks->nb_tracks; i++) {
640         av_freep(&tracks->tracks[i]->codec_private);
641         av_freep(&tracks->tracks[i]->offsets);
642         av_freep(&tracks->tracks[i]);
643     }
644     av_freep(&tracks->tracks);
645     tracks->nb_tracks = 0;
646 }
647
648 int main(int argc, char **argv)
649 {
650     const char *basename = NULL;
651     const char *path_prefix = "", *ismc_prefix = "";
652     const char *output_prefix = "";
653     char output_prefix_buf[2048];
654     int split = 0, ismf = 0, i;
655     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
656
657     av_register_all();
658
659     for (i = 1; i < argc; i++) {
660         if (!strcmp(argv[i], "-n")) {
661             basename = argv[i + 1];
662             i++;
663         } else if (!strcmp(argv[i], "-path-prefix")) {
664             path_prefix = argv[i + 1];
665             i++;
666         } else if (!strcmp(argv[i], "-ismc-prefix")) {
667             ismc_prefix = argv[i + 1];
668             i++;
669         } else if (!strcmp(argv[i], "-output")) {
670             output_prefix = argv[i + 1];
671             i++;
672             if (output_prefix[strlen(output_prefix) - 1] != '/') {
673                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
674                          "%s/", output_prefix);
675                 output_prefix = output_prefix_buf;
676             }
677         } else if (!strcmp(argv[i], "-split")) {
678             split = 1;
679         } else if (!strcmp(argv[i], "-ismf")) {
680             ismf = 1;
681         } else if (argv[i][0] == '-') {
682             return usage(argv[0], 1);
683         } else {
684             if (!basename)
685                 ismf = 0;
686             if (handle_file(&tracks, argv[i], split, ismf,
687                             basename, output_prefix))
688                 return 1;
689         }
690     }
691     if (!tracks.nb_tracks || (!basename && !split))
692         return usage(argv[0], 1);
693
694     if (!split)
695         output_server_manifest(&tracks, basename, output_prefix,
696                                path_prefix, ismc_prefix);
697     output_client_manifest(&tracks, basename, output_prefix, split);
698
699     clean_tracks(&tracks);
700
701     return 0;
702 }