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 * 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
28 * To pre-split files for serving as static files by a web server without
29 * any extra server support, create the ismv file as above, and split it:
30 * ismindex -split foo.ismv
31 * This step creates a file Manifest and directories QualityLevel(...),
32 * that can be read directly by a smooth streaming player.
40 #define mkdir(a, b) _mkdir(a)
45 #include "libavformat/avformat.h"
46 #include "libavutil/intreadwrite.h"
47 #include "libavutil/mathematics.h"
49 static int usage(const char *argv0, int ret)
51 fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
66 int is_audio, is_video;
69 int sample_rate, channels;
70 uint8_t *codec_private;
71 int codec_private_size;
72 struct MoofOffset *offsets;
82 struct Track **tracks;
83 int video_track, audio_track;
84 int nb_video_tracks, nb_audio_tracks;
87 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
100 int len = FFMIN(sizeof(buf), size);
101 if (avio_read(in, buf, len) != len)
103 avio_write(out, buf, len);
109 static int write_fragment(const char *filename, AVIOContext *in)
111 AVIOContext *out = NULL;
114 if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
116 copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
117 copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
125 static int write_fragments(struct Tracks *tracks, int start_index,
128 char dirname[100], filename[500];
131 for (i = start_index; i < tracks->nb_tracks; i++) {
132 struct Track *track = tracks->tracks[i];
133 const char *type = track->is_video ? "video" : "audio";
134 snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
135 if (mkdir(dirname, 0777) == -1)
136 return AVERROR(errno);
137 for (j = 0; j < track->chunks; j++) {
138 snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
139 dirname, type, track->offsets[j].time);
140 avio_seek(in, track->offsets[j].offset, SEEK_SET);
141 write_fragment(filename, in);
147 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
149 int ret = AVERROR_EOF, track_id;
150 int version, fieldlength, i, j;
151 int64_t pos = avio_tell(f);
152 uint32_t size = avio_rb32(f);
153 struct Track *track = NULL;
155 if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
157 version = avio_r8(f);
159 track_id = avio_rb32(f); /* track id */
160 for (i = start_index; i < tracks->nb_tracks && !track; i++)
161 if (tracks->tracks[i]->track_id == track_id)
162 track = tracks->tracks[i];
164 /* Ok, continue parsing the next atom */
168 fieldlength = avio_rb32(f);
169 track->chunks = avio_rb32(f);
170 track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
171 if (!track->offsets) {
172 ret = AVERROR(ENOMEM);
175 for (i = 0; i < track->chunks; i++) {
177 track->offsets[i].time = avio_rb64(f);
178 track->offsets[i].offset = avio_rb64(f);
180 track->offsets[i].time = avio_rb32(f);
181 track->offsets[i].offset = avio_rb32(f);
183 for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
185 for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
187 for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
190 track->offsets[i - 1].duration = track->offsets[i].time -
191 track->offsets[i - 1].time;
193 if (track->chunks > 0)
194 track->offsets[track->chunks - 1].duration = track->duration -
195 track->offsets[track->chunks - 1].time;
199 avio_seek(f, pos + size, SEEK_SET);
203 static int read_mfra(struct Tracks *tracks, int start_index,
204 const char *file, int split)
207 AVIOContext *f = NULL;
210 if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
212 avio_seek(f, avio_size(f) - 4, SEEK_SET);
213 mfra_size = avio_rb32(f);
214 avio_seek(f, -mfra_size, SEEK_CUR);
215 if (avio_rb32(f) != mfra_size) {
216 err = AVERROR_INVALIDDATA;
219 if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
220 err = AVERROR_INVALIDDATA;
223 while (!read_tfra(tracks, start_index, f)) {
228 err = write_fragments(tracks, start_index, f);
234 fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
238 static int get_private_data(struct Track *track, AVCodecContext *codec)
240 track->codec_private_size = codec->extradata_size;
241 track->codec_private = av_mallocz(codec->extradata_size);
242 if (!track->codec_private)
243 return AVERROR(ENOMEM);
244 memcpy(track->codec_private, codec->extradata, codec->extradata_size);
248 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
250 AVIOContext *io = NULL;
251 uint16_t sps_size, pps_size;
252 int err = AVERROR(EINVAL);
254 if (codec->codec_id == AV_CODEC_ID_VC1)
255 return get_private_data(track, codec);
257 if (avio_open_dyn_buf(&io) < 0) {
258 err = AVERROR(ENOMEM);
261 if (codec->extradata_size < 11 || codec->extradata[0] != 1)
263 sps_size = AV_RB16(&codec->extradata[6]);
264 if (11 + sps_size > codec->extradata_size)
266 avio_wb32(io, 0x00000001);
267 avio_write(io, &codec->extradata[8], sps_size);
268 pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
269 if (11 + sps_size + pps_size > codec->extradata_size)
271 avio_wb32(io, 0x00000001);
272 avio_write(io, &codec->extradata[11 + sps_size], pps_size);
276 track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
280 static int handle_file(struct Tracks *tracks, const char *file, int split)
282 AVFormatContext *ctx = NULL;
283 int err = 0, i, orig_tracks = tracks->nb_tracks;
284 char errbuf[50], *ptr;
287 err = avformat_open_input(&ctx, file, NULL, NULL);
289 av_strerror(err, errbuf, sizeof(errbuf));
290 fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
294 err = avformat_find_stream_info(ctx, NULL);
296 av_strerror(err, errbuf, sizeof(errbuf));
297 fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
301 if (ctx->nb_streams < 1) {
302 fprintf(stderr, "No streams found in %s\n", file);
305 if (!tracks->duration)
306 tracks->duration = ctx->duration;
308 for (i = 0; i < ctx->nb_streams; i++) {
310 AVStream *st = ctx->streams[i];
311 track = av_mallocz(sizeof(*track));
313 err = AVERROR(ENOMEM);
316 temp = av_realloc(tracks->tracks,
317 sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
320 err = AVERROR(ENOMEM);
323 tracks->tracks = temp;
324 tracks->tracks[tracks->nb_tracks] = track;
327 if ((ptr = strrchr(file, '/')) != NULL)
328 track->name = ptr + 1;
330 track->bitrate = st->codec->bit_rate;
331 track->track_id = st->id;
332 track->timescale = st->time_base.den;
333 track->duration = av_rescale_rnd(ctx->duration, track->timescale,
334 AV_TIME_BASE, AV_ROUND_UP);
335 track->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
336 track->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
338 if (!track->is_audio && !track->is_video) {
340 "Track %d in %s is neither video nor audio, skipping\n",
341 track->track_id, file);
342 av_freep(&tracks->tracks[tracks->nb_tracks]);
346 if (track->is_audio) {
347 if (tracks->audio_track < 0)
348 tracks->audio_track = tracks->nb_tracks;
349 tracks->nb_audio_tracks++;
350 track->channels = st->codec->channels;
351 track->sample_rate = st->codec->sample_rate;
352 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
353 track->fourcc = "AACL";
355 track->blocksize = 4;
356 } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
357 track->fourcc = "WMAP";
358 track->tag = st->codec->codec_tag;
359 track->blocksize = st->codec->block_align;
361 get_private_data(track, st->codec);
363 if (track->is_video) {
364 if (tracks->video_track < 0)
365 tracks->video_track = tracks->nb_tracks;
366 tracks->nb_video_tracks++;
367 track->width = st->codec->width;
368 track->height = st->codec->height;
369 if (st->codec->codec_id == AV_CODEC_ID_H264)
370 track->fourcc = "H264";
371 else if (st->codec->codec_id == AV_CODEC_ID_VC1)
372 track->fourcc = "WVC1";
373 get_video_private_data(track, st->codec);
379 avformat_close_input(&ctx);
381 err = read_mfra(tracks, orig_tracks, file, split);
385 avformat_close_input(&ctx);
389 static void output_server_manifest(struct Tracks *tracks,
390 const char *basename)
396 snprintf(filename, sizeof(filename), "%s.ism", basename);
397 out = fopen(filename, "w");
402 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
403 fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
404 fprintf(out, "\t<head>\n");
405 fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
406 "content=\"%s.ismc\" />\n", basename);
407 fprintf(out, "\t</head>\n");
408 fprintf(out, "\t<body>\n");
409 fprintf(out, "\t\t<switch>\n");
410 for (i = 0; i < tracks->nb_tracks; i++) {
411 struct Track *track = tracks->tracks[i];
412 const char *type = track->is_video ? "video" : "audio";
413 fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
414 type, track->name, track->bitrate);
415 fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
416 "valueType=\"data\" />\n", track->track_id);
417 fprintf(out, "\t\t\t</%s>\n", type);
419 fprintf(out, "\t\t</switch>\n");
420 fprintf(out, "\t</body>\n");
421 fprintf(out, "</smil>\n");
425 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
429 struct Track *track = tracks->tracks[main];
430 for (i = 0; i < track->chunks; i++) {
431 for (j = main + 1; j < tracks->nb_tracks; j++) {
432 if (tracks->tracks[j]->is_audio == track->is_audio &&
433 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
434 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
435 type, i, track->name, tracks->tracks[j]->name);
437 fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n",
438 i, track->offsets[i].duration);
442 static void output_client_manifest(struct Tracks *tracks,
443 const char *basename, int split)
450 snprintf(filename, sizeof(filename), "Manifest");
452 snprintf(filename, sizeof(filename), "%s.ismc", basename);
453 out = fopen(filename, "w");
458 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
459 fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
460 "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
461 if (tracks->video_track >= 0) {
462 struct Track *track = tracks->tracks[tracks->video_track];
463 struct Track *first_track = track;
466 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
468 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
469 tracks->nb_video_tracks, track->chunks);
470 for (i = 0; i < tracks->nb_tracks; i++) {
471 track = tracks->tracks[i];
472 if (!track->is_video)
475 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
476 "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
477 "CodecPrivateData=\"",
478 index, track->bitrate, track->fourcc, track->width, track->height);
479 for (j = 0; j < track->codec_private_size; j++)
480 fprintf(out, "%02X", track->codec_private[j]);
481 fprintf(out, "\" />\n");
483 if (track->chunks != first_track->chunks)
484 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
485 track->name, first_track->name);
487 print_track_chunks(out, tracks, tracks->video_track, "video");
488 fprintf(out, "\t</StreamIndex>\n");
490 if (tracks->audio_track >= 0) {
491 struct Track *track = tracks->tracks[tracks->audio_track];
492 struct Track *first_track = track;
495 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
497 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
498 tracks->nb_audio_tracks, track->chunks);
499 for (i = 0; i < tracks->nb_tracks; i++) {
500 track = tracks->tracks[i];
501 if (!track->is_audio)
504 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
505 "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
506 "BitsPerSample=\"16\" PacketSize=\"%d\" "
507 "AudioTag=\"%d\" CodecPrivateData=\"",
508 index, track->bitrate, track->fourcc, track->sample_rate,
509 track->channels, track->blocksize, track->tag);
510 for (j = 0; j < track->codec_private_size; j++)
511 fprintf(out, "%02X", track->codec_private[j]);
512 fprintf(out, "\" />\n");
514 if (track->chunks != first_track->chunks)
515 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
516 track->name, first_track->name);
518 print_track_chunks(out, tracks, tracks->audio_track, "audio");
519 fprintf(out, "\t</StreamIndex>\n");
521 fprintf(out, "</SmoothStreamingMedia>\n");
525 static void clean_tracks(struct Tracks *tracks)
528 for (i = 0; i < tracks->nb_tracks; i++) {
529 av_freep(&tracks->tracks[i]->codec_private);
530 av_freep(&tracks->tracks[i]->offsets);
531 av_freep(&tracks->tracks[i]);
533 av_freep(&tracks->tracks);
534 tracks->nb_tracks = 0;
537 int main(int argc, char **argv)
539 const char *basename = NULL;
541 struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
545 for (i = 1; i < argc; i++) {
546 if (!strcmp(argv[i], "-n")) {
547 basename = argv[i + 1];
549 } else if (!strcmp(argv[i], "-split")) {
551 } else if (argv[i][0] == '-') {
552 return usage(argv[0], 1);
554 if (handle_file(&tracks, argv[i], split))
558 if (!tracks.nb_tracks || (!basename && !split))
559 return usage(argv[0], 1);
562 output_server_manifest(&tracks, basename);
563 output_client_manifest(&tracks, basename, split);
565 clean_tracks(&tracks);