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 * 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.
38 #include "libavformat/avformat.h"
39 #include "libavformat/os_support.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/mathematics.h"
43 static int usage(const char *argv0, int ret)
45 fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
60 int is_audio, is_video;
63 int sample_rate, channels;
64 uint8_t *codec_private;
65 int codec_private_size;
66 struct MoofOffset *offsets;
76 struct Track **tracks;
77 int video_track, audio_track;
78 int nb_video_tracks, nb_audio_tracks;
81 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
94 int len = FFMIN(sizeof(buf), size);
95 if (avio_read(in, buf, len) != len)
97 avio_write(out, buf, len);
103 static int write_fragment(const char *filename, AVIOContext *in)
105 AVIOContext *out = NULL;
108 if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
110 copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
111 copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
119 static int write_fragments(struct Tracks *tracks, int start_index,
122 char dirname[100], filename[500];
125 for (i = start_index; i < tracks->nb_tracks; i++) {
126 struct Track *track = tracks->tracks[i];
127 const char *type = track->is_video ? "video" : "audio";
128 snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
129 mkdir(dirname, 0777);
130 for (j = 0; j < track->chunks; j++) {
131 snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
132 dirname, type, track->offsets[j].time);
133 avio_seek(in, track->offsets[j].offset, SEEK_SET);
134 write_fragment(filename, in);
140 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
142 int ret = AVERROR_EOF, track_id;
143 int version, fieldlength, i, j;
144 int64_t pos = avio_tell(f);
145 uint32_t size = avio_rb32(f);
146 struct Track *track = NULL;
148 if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
150 version = avio_r8(f);
152 track_id = avio_rb32(f); /* track id */
153 for (i = start_index; i < tracks->nb_tracks && !track; i++)
154 if (tracks->tracks[i]->track_id == track_id)
155 track = tracks->tracks[i];
157 /* Ok, continue parsing the next atom */
161 fieldlength = avio_rb32(f);
162 track->chunks = avio_rb32(f);
163 track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
164 if (!track->offsets) {
165 ret = AVERROR(ENOMEM);
168 for (i = 0; i < track->chunks; i++) {
170 track->offsets[i].time = avio_rb64(f);
171 track->offsets[i].offset = avio_rb64(f);
173 track->offsets[i].time = avio_rb32(f);
174 track->offsets[i].offset = avio_rb32(f);
176 for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
178 for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
180 for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
183 track->offsets[i - 1].duration = track->offsets[i].time -
184 track->offsets[i - 1].time;
186 if (track->chunks > 0)
187 track->offsets[track->chunks - 1].duration = track->duration -
188 track->offsets[track->chunks - 1].time;
192 avio_seek(f, pos + size, SEEK_SET);
196 static int read_mfra(struct Tracks *tracks, int start_index,
197 const char *file, int split)
200 AVIOContext *f = NULL;
203 if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
205 avio_seek(f, avio_size(f) - 4, SEEK_SET);
206 mfra_size = avio_rb32(f);
207 avio_seek(f, -mfra_size, SEEK_CUR);
208 if (avio_rb32(f) != mfra_size) {
209 err = AVERROR_INVALIDDATA;
212 if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
213 err = AVERROR_INVALIDDATA;
216 while (!read_tfra(tracks, start_index, f)) {
221 write_fragments(tracks, start_index, f);
227 fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
231 static int get_private_data(struct Track *track, AVCodecContext *codec)
233 track->codec_private_size = codec->extradata_size;
234 track->codec_private = av_mallocz(codec->extradata_size);
235 if (!track->codec_private)
236 return AVERROR(ENOMEM);
237 memcpy(track->codec_private, codec->extradata, codec->extradata_size);
241 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
243 AVIOContext *io = NULL;
244 uint16_t sps_size, pps_size;
245 int err = AVERROR(EINVAL);
247 if (codec->codec_id == AV_CODEC_ID_VC1)
248 return get_private_data(track, codec);
250 avio_open_dyn_buf(&io);
251 if (codec->extradata_size < 11 || codec->extradata[0] != 1)
253 sps_size = AV_RB16(&codec->extradata[6]);
254 if (11 + sps_size > codec->extradata_size)
256 avio_wb32(io, 0x00000001);
257 avio_write(io, &codec->extradata[8], sps_size);
258 pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
259 if (11 + sps_size + pps_size > codec->extradata_size)
261 avio_wb32(io, 0x00000001);
262 avio_write(io, &codec->extradata[11 + sps_size], pps_size);
266 track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
270 static int handle_file(struct Tracks *tracks, const char *file, int split)
272 AVFormatContext *ctx = NULL;
273 int err = 0, i, orig_tracks = tracks->nb_tracks;
274 char errbuf[50], *ptr;
277 err = avformat_open_input(&ctx, file, NULL, NULL);
279 av_strerror(err, errbuf, sizeof(errbuf));
280 fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
284 err = avformat_find_stream_info(ctx, NULL);
286 av_strerror(err, errbuf, sizeof(errbuf));
287 fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
291 if (ctx->nb_streams < 1) {
292 fprintf(stderr, "No streams found in %s\n", file);
296 for (i = 0; i < ctx->nb_streams; i++) {
298 AVStream *st = ctx->streams[i];
299 track = av_mallocz(sizeof(*track));
301 err = AVERROR(ENOMEM);
304 temp = av_realloc(tracks->tracks,
305 sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
308 err = AVERROR(ENOMEM);
311 tracks->tracks = temp;
312 tracks->tracks[tracks->nb_tracks] = track;
315 if ((ptr = strrchr(file, '/')) != NULL)
316 track->name = ptr + 1;
318 track->bitrate = st->codec->bit_rate;
319 track->track_id = st->id;
320 track->timescale = st->time_base.den;
321 track->duration = st->duration;
322 track->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
323 track->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
325 if (!track->is_audio && !track->is_video) {
327 "Track %d in %s is neither video nor audio, skipping\n",
328 track->track_id, file);
329 av_freep(&tracks->tracks[tracks->nb_tracks]);
333 tracks->duration = FFMAX(tracks->duration,
334 av_rescale_rnd(track->duration, AV_TIME_BASE,
335 track->timescale, AV_ROUND_UP));
337 if (track->is_audio) {
338 if (tracks->audio_track < 0)
339 tracks->audio_track = tracks->nb_tracks;
340 tracks->nb_audio_tracks++;
341 track->channels = st->codec->channels;
342 track->sample_rate = st->codec->sample_rate;
343 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
344 track->fourcc = "AACL";
346 track->blocksize = 4;
347 } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
348 track->fourcc = "WMAP";
349 track->tag = st->codec->codec_tag;
350 track->blocksize = st->codec->block_align;
352 get_private_data(track, st->codec);
354 if (track->is_video) {
355 if (tracks->video_track < 0)
356 tracks->video_track = tracks->nb_tracks;
357 tracks->nb_video_tracks++;
358 track->width = st->codec->width;
359 track->height = st->codec->height;
360 if (st->codec->codec_id == AV_CODEC_ID_H264)
361 track->fourcc = "H264";
362 else if (st->codec->codec_id == AV_CODEC_ID_VC1)
363 track->fourcc = "WVC1";
364 get_video_private_data(track, st->codec);
370 avformat_close_input(&ctx);
372 err = read_mfra(tracks, orig_tracks, file, split);
376 avformat_close_input(&ctx);
380 static void output_server_manifest(struct Tracks *tracks,
381 const char *basename)
387 snprintf(filename, sizeof(filename), "%s.ism", basename);
388 out = fopen(filename, "w");
393 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
394 fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
395 fprintf(out, "\t<head>\n");
396 fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
397 "content=\"%s.ismc\" />\n", basename);
398 fprintf(out, "\t</head>\n");
399 fprintf(out, "\t<body>\n");
400 fprintf(out, "\t\t<switch>\n");
401 for (i = 0; i < tracks->nb_tracks; i++) {
402 struct Track *track = tracks->tracks[i];
403 const char *type = track->is_video ? "video" : "audio";
404 fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
405 type, track->name, track->bitrate);
406 fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
407 "valueType=\"data\" />\n", track->track_id);
408 fprintf(out, "\t\t\t</%s>\n", type);
410 fprintf(out, "\t\t</switch>\n");
411 fprintf(out, "\t</body>\n");
412 fprintf(out, "</smil>\n");
416 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
420 struct Track *track = tracks->tracks[main];
421 for (i = 0; i < track->chunks; i++) {
422 for (j = main + 1; j < tracks->nb_tracks; j++) {
423 if (tracks->tracks[j]->is_audio == track->is_audio &&
424 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
425 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
426 type, i, track->name, tracks->tracks[j]->name);
428 fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
429 i, track->offsets[i].duration);
433 static void output_client_manifest(struct Tracks *tracks,
434 const char *basename, int split)
441 snprintf(filename, sizeof(filename), "Manifest");
443 snprintf(filename, sizeof(filename), "%s.ismc", basename);
444 out = fopen(filename, "w");
449 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
450 fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
451 "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
452 if (tracks->video_track >= 0) {
453 struct Track *track = tracks->tracks[tracks->video_track];
454 struct Track *first_track = track;
457 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
459 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
460 tracks->nb_video_tracks, track->chunks);
461 for (i = 0; i < tracks->nb_tracks; i++) {
462 track = tracks->tracks[i];
463 if (!track->is_video)
466 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
467 "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
468 "CodecPrivateData=\"",
469 index, track->bitrate, track->fourcc, track->width, track->height);
470 for (j = 0; j < track->codec_private_size; j++)
471 fprintf(out, "%02X", track->codec_private[j]);
472 fprintf(out, "\" />\n");
474 if (track->chunks != first_track->chunks)
475 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
476 track->name, first_track->name);
478 print_track_chunks(out, tracks, tracks->video_track, "video");
479 fprintf(out, "\t</StreamIndex>\n");
481 if (tracks->audio_track >= 0) {
482 struct Track *track = tracks->tracks[tracks->audio_track];
483 struct Track *first_track = track;
486 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
488 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
489 tracks->nb_audio_tracks, track->chunks);
490 for (i = 0; i < tracks->nb_tracks; i++) {
491 track = tracks->tracks[i];
492 if (!track->is_audio)
495 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
496 "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
497 "BitsPerSample=\"16\" PacketSize=\"%d\" "
498 "AudioTag=\"%d\" CodecPrivateData=\"",
499 index, track->bitrate, track->fourcc, track->sample_rate,
500 track->channels, track->blocksize, track->tag);
501 for (j = 0; j < track->codec_private_size; j++)
502 fprintf(out, "%02X", track->codec_private[j]);
503 fprintf(out, "\" />\n");
505 if (track->chunks != first_track->chunks)
506 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
507 track->name, first_track->name);
509 print_track_chunks(out, tracks, tracks->audio_track, "audio");
510 fprintf(out, "\t</StreamIndex>\n");
512 fprintf(out, "</SmoothStreamingMedia>\n");
516 static void clean_tracks(struct Tracks *tracks)
519 for (i = 0; i < tracks->nb_tracks; i++) {
520 av_freep(&tracks->tracks[i]->codec_private);
521 av_freep(&tracks->tracks[i]->offsets);
522 av_freep(&tracks->tracks[i]);
524 av_freep(&tracks->tracks);
525 tracks->nb_tracks = 0;
528 int main(int argc, char **argv)
530 const char *basename = NULL;
532 struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
536 for (i = 1; i < argc; i++) {
537 if (!strcmp(argv[i], "-n")) {
538 basename = argv[i + 1];
540 } else if (!strcmp(argv[i], "-split")) {
542 } else if (argv[i][0] == '-') {
543 return usage(argv[0], 1);
545 if (handle_file(&tracks, argv[i], split))
549 if (!tracks.nb_tracks || (!basename && !split))
550 return usage(argv[0], 1);
553 output_server_manifest(&tracks, basename);
554 output_client_manifest(&tracks, basename, split);
556 clean_tracks(&tracks);