2 * Copyright (c) 2012 Martin Storsjo
4 * This file is part of Libav.
6 * Libav 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.
11 * Libav 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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * To create a simple file for smooth streaming:
23 * avconv <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
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.
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.
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.
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.)
50 #include "libavformat/avformat.h"
51 #include "libavformat/isom.h"
52 #include "libavformat/os_support.h"
53 #include "libavutil/intreadwrite.h"
54 #include "libavutil/mathematics.h"
56 static int usage(const char *argv0, int ret)
58 fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
59 "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
74 int is_audio, is_video;
77 int sample_rate, channels;
78 uint8_t *codec_private;
79 int codec_private_size;
80 struct MoofOffset *offsets;
90 struct Track **tracks;
91 int video_track, audio_track;
92 int nb_video_tracks, nb_audio_tracks;
95 static int expect_tag(int32_t got_tag, int32_t expected_tag) {
96 if (got_tag != expected_tag) {
97 char got_tag_str[4], expected_tag_str[4];
98 AV_WB32(got_tag_str, got_tag);
99 AV_WB32(expected_tag_str, expected_tag);
100 fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
107 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
111 size = avio_rb32(in);
113 avio_wb32(out, size);
115 if (expect_tag(tag, tag_name) != 0)
120 int len = FFMIN(sizeof(buf), size);
122 if ((got = avio_read(in, buf, len)) != len) {
123 fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
126 avio_write(out, buf, len);
132 static int skip_tag(AVIOContext *in, int32_t tag_name)
134 int64_t pos = avio_tell(in);
137 size = avio_rb32(in);
139 if (expect_tag(tag, tag_name) != 0)
141 avio_seek(in, pos + size, SEEK_SET);
145 static int write_fragment(const char *filename, AVIOContext *in)
147 AVIOContext *out = NULL;
150 if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
152 av_strerror(ret, errbuf, sizeof(errbuf));
153 fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
156 ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
158 ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
166 static int skip_fragment(AVIOContext *in)
169 ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
171 ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
175 static int write_fragments(struct Tracks *tracks, int start_index,
176 AVIOContext *in, const char *basename,
177 int split, int ismf, const char* output_prefix)
179 char dirname[2048], filename[2048], idxname[2048];
180 int i, j, ret = 0, fragment_ret;
184 snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
185 out = fopen(idxname, "w");
187 ret = AVERROR(errno);
192 for (i = start_index; i < tracks->nb_tracks; i++) {
193 struct Track *track = tracks->tracks[i];
194 const char *type = track->is_video ? "video" : "audio";
195 snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
197 if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
198 ret = AVERROR(errno);
203 for (j = 0; j < track->chunks; j++) {
204 snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
205 dirname, type, track->offsets[j].time);
206 avio_seek(in, track->offsets[j].offset, SEEK_SET);
208 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
210 fragment_ret = write_fragment(filename, in);
212 fragment_ret = skip_fragment(in);
214 fprintf(out, " %"PRId64"\n", avio_tell(in));
215 if (fragment_ret != 0) {
216 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
217 track->track_id, track->name);
228 static int64_t read_trun_duration(AVIOContext *in, int default_duration,
235 int64_t first_pts = 0;
237 avio_r8(in); /* version */
238 flags = avio_rb24(in);
239 if (default_duration <= 0 && !(flags & MOV_TRUN_SAMPLE_DURATION)) {
240 fprintf(stderr, "No sample duration in trun flags\n");
243 entries = avio_rb32(in);
245 if (flags & MOV_TRUN_DATA_OFFSET) avio_rb32(in);
246 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) avio_rb32(in);
249 for (i = 0; i < entries && pos < end; i++) {
250 int sample_duration = default_duration;
252 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(in);
253 if (flags & MOV_TRUN_SAMPLE_SIZE) avio_rb32(in);
254 if (flags & MOV_TRUN_SAMPLE_FLAGS) avio_rb32(in);
255 if (flags & MOV_TRUN_SAMPLE_CTS) pts += avio_rb32(in);
256 if (sample_duration < 0) {
257 fprintf(stderr, "Negative sample duration %d\n", sample_duration);
262 max_pts = FFMAX(max_pts, pts + sample_duration);
263 dts += sample_duration;
267 return max_pts - first_pts;
270 static int64_t read_moof_duration(AVIOContext *in, int64_t offset)
273 int32_t moof_size, size, tag;
275 int default_duration = 0;
277 avio_seek(in, offset, SEEK_SET);
278 moof_size = avio_rb32(in);
280 if (expect_tag(tag, MKBETAG('m', 'o', 'o', 'f')) != 0)
282 while (pos < offset + moof_size) {
284 size = avio_rb32(in);
286 if (tag == MKBETAG('t', 'r', 'a', 'f')) {
287 int64_t traf_pos = pos;
288 int64_t traf_size = size;
289 while (pos < traf_pos + traf_size) {
291 size = avio_rb32(in);
293 if (tag == MKBETAG('t', 'f', 'h', 'd')) {
295 avio_r8(in); /* version */
296 flags = avio_rb24(in);
297 avio_rb32(in); /* track_id */
298 if (flags & MOV_TFHD_BASE_DATA_OFFSET)
300 if (flags & MOV_TFHD_STSD_ID)
302 if (flags & MOV_TFHD_DEFAULT_DURATION)
303 default_duration = avio_rb32(in);
305 if (tag == MKBETAG('t', 'r', 'u', 'n')) {
306 return read_trun_duration(in, default_duration,
309 avio_seek(in, pos + size, SEEK_SET);
311 fprintf(stderr, "Couldn't find trun\n");
314 avio_seek(in, pos + size, SEEK_SET);
316 fprintf(stderr, "Couldn't find traf\n");
322 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
324 int ret = AVERROR_EOF, track_id;
325 int version, fieldlength, i, j;
326 int64_t pos = avio_tell(f);
327 uint32_t size = avio_rb32(f);
328 struct Track *track = NULL;
330 if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
332 version = avio_r8(f);
334 track_id = avio_rb32(f); /* track id */
335 for (i = start_index; i < tracks->nb_tracks && !track; i++)
336 if (tracks->tracks[i]->track_id == track_id)
337 track = tracks->tracks[i];
339 /* Ok, continue parsing the next atom */
343 fieldlength = avio_rb32(f);
344 track->chunks = avio_rb32(f);
345 track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
346 if (!track->offsets) {
347 ret = AVERROR(ENOMEM);
350 // The duration here is always the difference between consecutive
352 for (i = 0; i < track->chunks; i++) {
354 track->offsets[i].time = avio_rb64(f);
355 track->offsets[i].offset = avio_rb64(f);
357 track->offsets[i].time = avio_rb32(f);
358 track->offsets[i].offset = avio_rb32(f);
360 for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
362 for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
364 for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
367 track->offsets[i - 1].duration = track->offsets[i].time -
368 track->offsets[i - 1].time;
370 if (track->chunks > 0) {
371 track->offsets[track->chunks - 1].duration = track->offsets[0].time +
373 track->offsets[track->chunks - 1].time;
375 // Now try and read the actual durations from the trun sample data.
376 for (i = 0; i < track->chunks; i++) {
377 int64_t duration = read_moof_duration(f, track->offsets[i].offset);
378 if (duration > 0 && llabs(duration - track->offsets[i].duration) > 3) {
379 // 3 allows for integer duration to drift a few units,
380 // e.g., for 1/3 durations
381 track->offsets[i].duration = duration;
384 if (track->chunks > 0) {
385 if (track->offsets[track->chunks - 1].duration <= 0) {
386 fprintf(stderr, "Calculated last chunk duration for track %d "
387 "was non-positive (%"PRId64"), probably due to missing "
388 "fragments ", track->track_id,
389 track->offsets[track->chunks - 1].duration);
390 if (track->chunks > 1) {
391 track->offsets[track->chunks - 1].duration =
392 track->offsets[track->chunks - 2].duration;
394 track->offsets[track->chunks - 1].duration = 1;
396 fprintf(stderr, "corrected to %"PRId64"\n",
397 track->offsets[track->chunks - 1].duration);
398 track->duration = track->offsets[track->chunks - 1].time +
399 track->offsets[track->chunks - 1].duration -
400 track->offsets[0].time;
401 fprintf(stderr, "Track duration corrected to %"PRId64"\n",
408 avio_seek(f, pos + size, SEEK_SET);
412 static int read_mfra(struct Tracks *tracks, int start_index,
413 const char *file, int split, int ismf,
414 const char *basename, const char* output_prefix)
417 const char* err_str = "";
418 AVIOContext *f = NULL;
421 if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
423 avio_seek(f, avio_size(f) - 4, SEEK_SET);
424 mfra_size = avio_rb32(f);
425 avio_seek(f, -mfra_size, SEEK_CUR);
426 if (avio_rb32(f) != mfra_size) {
427 err = AVERROR_INVALIDDATA;
428 err_str = "mfra size mismatch";
431 if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
432 err = AVERROR_INVALIDDATA;
433 err_str = "mfra tag mismatch";
436 while (!read_tfra(tracks, start_index, f)) {
441 err = write_fragments(tracks, start_index, f, basename, split, ismf,
443 err_str = "error in write_fragments";
449 fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
453 static int get_private_data(struct Track *track, AVCodecContext *codec)
455 track->codec_private_size = codec->extradata_size;
456 track->codec_private = av_mallocz(codec->extradata_size);
457 if (!track->codec_private)
458 return AVERROR(ENOMEM);
459 memcpy(track->codec_private, codec->extradata, codec->extradata_size);
463 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
465 AVIOContext *io = NULL;
466 uint16_t sps_size, pps_size;
469 if (codec->codec_id == AV_CODEC_ID_VC1)
470 return get_private_data(track, codec);
472 if ((err = avio_open_dyn_buf(&io)) < 0)
474 err = AVERROR(EINVAL);
475 if (codec->extradata_size < 11 || codec->extradata[0] != 1)
477 sps_size = AV_RB16(&codec->extradata[6]);
478 if (11 + sps_size > codec->extradata_size)
480 avio_wb32(io, 0x00000001);
481 avio_write(io, &codec->extradata[8], sps_size);
482 pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
483 if (11 + sps_size + pps_size > codec->extradata_size)
485 avio_wb32(io, 0x00000001);
486 avio_write(io, &codec->extradata[11 + sps_size], pps_size);
490 track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
494 static int handle_file(struct Tracks *tracks, const char *file, int split,
495 int ismf, const char *basename,
496 const char* output_prefix)
498 AVFormatContext *ctx = NULL;
499 int err = 0, i, orig_tracks = tracks->nb_tracks;
500 char errbuf[50], *ptr;
503 err = avformat_open_input(&ctx, file, NULL, NULL);
505 av_strerror(err, errbuf, sizeof(errbuf));
506 fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
510 err = avformat_find_stream_info(ctx, NULL);
512 av_strerror(err, errbuf, sizeof(errbuf));
513 fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
517 if (ctx->nb_streams < 1) {
518 fprintf(stderr, "No streams found in %s\n", file);
522 for (i = 0; i < ctx->nb_streams; i++) {
524 AVStream *st = ctx->streams[i];
526 if (st->codec->bit_rate == 0) {
527 fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
532 track = av_mallocz(sizeof(*track));
534 err = AVERROR(ENOMEM);
537 temp = av_realloc(tracks->tracks,
538 sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
541 err = AVERROR(ENOMEM);
544 tracks->tracks = temp;
545 tracks->tracks[tracks->nb_tracks] = track;
548 if ((ptr = strrchr(file, '/')))
549 track->name = ptr + 1;
551 track->bitrate = st->codec->bit_rate;
552 track->track_id = st->id;
553 track->timescale = st->time_base.den;
554 track->duration = st->duration;
555 track->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
556 track->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
558 if (!track->is_audio && !track->is_video) {
560 "Track %d in %s is neither video nor audio, skipping\n",
561 track->track_id, file);
562 av_freep(&tracks->tracks[tracks->nb_tracks]);
566 tracks->duration = FFMAX(tracks->duration,
567 av_rescale_rnd(track->duration, AV_TIME_BASE,
568 track->timescale, AV_ROUND_UP));
570 if (track->is_audio) {
571 if (tracks->audio_track < 0)
572 tracks->audio_track = tracks->nb_tracks;
573 tracks->nb_audio_tracks++;
574 track->channels = st->codec->channels;
575 track->sample_rate = st->codec->sample_rate;
576 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
577 track->fourcc = "AACL";
579 track->blocksize = 4;
580 } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
581 track->fourcc = "WMAP";
582 track->tag = st->codec->codec_tag;
583 track->blocksize = st->codec->block_align;
585 get_private_data(track, st->codec);
587 if (track->is_video) {
588 if (tracks->video_track < 0)
589 tracks->video_track = tracks->nb_tracks;
590 tracks->nb_video_tracks++;
591 track->width = st->codec->width;
592 track->height = st->codec->height;
593 if (st->codec->codec_id == AV_CODEC_ID_H264)
594 track->fourcc = "H264";
595 else if (st->codec->codec_id == AV_CODEC_ID_VC1)
596 track->fourcc = "WVC1";
597 get_video_private_data(track, st->codec);
603 avformat_close_input(&ctx);
605 err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
610 avformat_close_input(&ctx);
614 static void output_server_manifest(struct Tracks *tracks, const char *basename,
615 const char *output_prefix,
616 const char *path_prefix,
617 const char *ismc_prefix)
623 snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
624 out = fopen(filename, "w");
629 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
630 fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
631 fprintf(out, "\t<head>\n");
632 fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
633 "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
634 fprintf(out, "\t</head>\n");
635 fprintf(out, "\t<body>\n");
636 fprintf(out, "\t\t<switch>\n");
637 for (i = 0; i < tracks->nb_tracks; i++) {
638 struct Track *track = tracks->tracks[i];
639 const char *type = track->is_video ? "video" : "audio";
640 fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
641 type, path_prefix, track->name, track->bitrate);
642 fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
643 "valueType=\"data\" />\n", track->track_id);
644 fprintf(out, "\t\t\t</%s>\n", type);
646 fprintf(out, "\t\t</switch>\n");
647 fprintf(out, "\t</body>\n");
648 fprintf(out, "</smil>\n");
652 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
657 struct Track *track = tracks->tracks[main];
658 int should_print_time_mismatch = 1;
660 for (i = 0; i < track->chunks; i++) {
661 for (j = main + 1; j < tracks->nb_tracks; j++) {
662 if (tracks->tracks[j]->is_audio == track->is_audio) {
663 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
664 fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
665 type, i, track->name, main, tracks->tracks[j]->name, j);
666 should_print_time_mismatch = 1;
668 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
669 if (should_print_time_mismatch)
670 fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
671 type, i, track->name, main, tracks->tracks[j]->name, j);
672 should_print_time_mismatch = 0;
676 fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" ",
677 i, track->offsets[i].duration);
678 if (pos != track->offsets[i].time) {
679 fprintf(out, "t=\"%"PRId64"\" ", track->offsets[i].time);
680 pos = track->offsets[i].time;
682 pos += track->offsets[i].duration;
683 fprintf(out, "/>\n");
687 static void output_client_manifest(struct Tracks *tracks, const char *basename,
688 const char *output_prefix, int split)
695 snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
697 snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
698 out = fopen(filename, "w");
703 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
704 fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
705 "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
706 if (tracks->video_track >= 0) {
707 struct Track *track = tracks->tracks[tracks->video_track];
708 struct Track *first_track = track;
711 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
713 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
714 tracks->nb_video_tracks, track->chunks);
715 for (i = 0; i < tracks->nb_tracks; i++) {
716 track = tracks->tracks[i];
717 if (!track->is_video)
720 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
721 "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
722 "CodecPrivateData=\"",
723 index, track->bitrate, track->fourcc, track->width, track->height);
724 for (j = 0; j < track->codec_private_size; j++)
725 fprintf(out, "%02X", track->codec_private[j]);
726 fprintf(out, "\" />\n");
728 if (track->chunks != first_track->chunks)
729 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
730 track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
732 print_track_chunks(out, tracks, tracks->video_track, "video");
733 fprintf(out, "\t</StreamIndex>\n");
735 if (tracks->audio_track >= 0) {
736 struct Track *track = tracks->tracks[tracks->audio_track];
737 struct Track *first_track = track;
740 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
742 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
743 tracks->nb_audio_tracks, track->chunks);
744 for (i = 0; i < tracks->nb_tracks; i++) {
745 track = tracks->tracks[i];
746 if (!track->is_audio)
749 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
750 "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
751 "BitsPerSample=\"16\" PacketSize=\"%d\" "
752 "AudioTag=\"%d\" CodecPrivateData=\"",
753 index, track->bitrate, track->fourcc, track->sample_rate,
754 track->channels, track->blocksize, track->tag);
755 for (j = 0; j < track->codec_private_size; j++)
756 fprintf(out, "%02X", track->codec_private[j]);
757 fprintf(out, "\" />\n");
759 if (track->chunks != first_track->chunks)
760 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
761 track->name, first_track->name);
763 print_track_chunks(out, tracks, tracks->audio_track, "audio");
764 fprintf(out, "\t</StreamIndex>\n");
766 fprintf(out, "</SmoothStreamingMedia>\n");
770 static void clean_tracks(struct Tracks *tracks)
773 for (i = 0; i < tracks->nb_tracks; i++) {
774 av_freep(&tracks->tracks[i]->codec_private);
775 av_freep(&tracks->tracks[i]->offsets);
776 av_freep(&tracks->tracks[i]);
778 av_freep(&tracks->tracks);
779 tracks->nb_tracks = 0;
782 int main(int argc, char **argv)
784 const char *basename = NULL;
785 const char *path_prefix = "", *ismc_prefix = "";
786 const char *output_prefix = "";
787 char output_prefix_buf[2048];
788 int split = 0, ismf = 0, i;
789 struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
793 for (i = 1; i < argc; i++) {
794 if (!strcmp(argv[i], "-n")) {
795 basename = argv[i + 1];
797 } else if (!strcmp(argv[i], "-path-prefix")) {
798 path_prefix = argv[i + 1];
800 } else if (!strcmp(argv[i], "-ismc-prefix")) {
801 ismc_prefix = argv[i + 1];
803 } else if (!strcmp(argv[i], "-output")) {
804 output_prefix = argv[i + 1];
806 if (output_prefix[strlen(output_prefix) - 1] != '/') {
807 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
808 "%s/", output_prefix);
809 output_prefix = output_prefix_buf;
811 } else if (!strcmp(argv[i], "-split")) {
813 } else if (!strcmp(argv[i], "-ismf")) {
815 } else if (argv[i][0] == '-') {
816 return usage(argv[0], 1);
820 if (handle_file(&tracks, argv[i], split, ismf,
821 basename, output_prefix))
825 if (!tracks.nb_tracks || (!basename && !split))
826 return usage(argv[0], 1);
829 output_server_manifest(&tracks, basename, output_prefix,
830 path_prefix, ismc_prefix);
831 output_client_manifest(&tracks, basename, output_prefix, split);
833 clean_tracks(&tracks);