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flvenc.c
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1 /*
2  * FLV muxer
3  * Copyright (c) 2003 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/intfloat.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/mathematics.h"
27 #include "avio_internal.h"
28 #include "avio.h"
29 #include "avc.h"
30 #include "avformat.h"
31 #include "flv.h"
32 #include "internal.h"
33 #include "metadata.h"
34 #include "libavutil/opt.h"
35 #include "libavcodec/put_bits.h"
36 #include "libavcodec/aacenctab.h"
37 
38 
39 static const AVCodecTag flv_video_codec_ids[] = {
49  { AV_CODEC_ID_NONE, 0 }
50 };
51 
52 static const AVCodecTag flv_audio_codec_ids[] = {
63  { AV_CODEC_ID_NONE, 0 }
64 };
65 
66 typedef enum {
68  FLV_NO_SEQUENCE_END = (1 << 1),
70  FLV_NO_METADATA = (1 << 3),
72 } FLVFlags;
73 
74 typedef struct FLVFileposition {
79 
80 typedef struct FLVContext {
82  int reserved;
83  int64_t duration_offset;
84  int64_t filesize_offset;
85  int64_t duration;
86  int64_t delay; ///< first dts delay (needed for AVC & Speex)
87 
89  int64_t datasize_offset;
90  int64_t datasize;
92  int64_t videosize;
94  int64_t audiosize;
95 
100 
107 
110 
114 
117  double framerate;
119 
120  int flags;
121 } FLVContext;
122 
123 typedef struct FLVStreamContext {
124  int64_t last_ts; ///< last timestamp for each stream
126 
128 {
131 
132  if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
135  else if (par->codec_id == AV_CODEC_ID_SPEEX) {
136  if (par->sample_rate != 16000) {
137  av_log(s, AV_LOG_ERROR,
138  "FLV only supports wideband (16kHz) Speex audio\n");
139  return AVERROR(EINVAL);
140  }
141  if (par->channels != 1) {
142  av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
143  return AVERROR(EINVAL);
144  }
146  } else {
147  switch (par->sample_rate) {
148  case 48000:
149  // 48khz mp3 is stored with 44k1 samplerate identifer
150  if (par->codec_id == AV_CODEC_ID_MP3) {
151  flags |= FLV_SAMPLERATE_44100HZ;
152  break;
153  } else {
154  goto error;
155  }
156  case 44100:
157  flags |= FLV_SAMPLERATE_44100HZ;
158  break;
159  case 22050:
160  flags |= FLV_SAMPLERATE_22050HZ;
161  break;
162  case 11025:
163  flags |= FLV_SAMPLERATE_11025HZ;
164  break;
165  case 16000: // nellymoser only
166  case 8000: // nellymoser only
167  case 5512: // not MP3
168  if (par->codec_id != AV_CODEC_ID_MP3) {
169  flags |= FLV_SAMPLERATE_SPECIAL;
170  break;
171  }
172  default:
173 error:
174  av_log(s, AV_LOG_ERROR,
175  "FLV does not support sample rate %d, "
176  "choose from (44100, 22050, 11025)\n", par->sample_rate);
177  return AVERROR(EINVAL);
178  }
179  }
180 
181  if (par->channels > 1)
182  flags |= FLV_STEREO;
183 
184  switch (par->codec_id) {
185  case AV_CODEC_ID_MP3:
187  break;
188  case AV_CODEC_ID_PCM_U8:
190  break;
193  break;
196  break;
199  break;
201  if (par->sample_rate == 8000)
203  else if (par->sample_rate == 16000)
205  else
207  break;
210  break;
213  break;
214  case 0:
215  flags |= par->codec_tag << 4;
216  break;
217  default:
218  av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
219  avcodec_get_name(par->codec_id));
220  return AVERROR(EINVAL);
221  }
222 
223  return flags;
224 }
225 
226 static void put_amf_string(AVIOContext *pb, const char *str)
227 {
228  size_t len = strlen(str);
229  avio_wb16(pb, len);
230  avio_write(pb, str, len);
231 }
232 
233 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
234 {
236  avio_wb24(pb, 5); /* Tag Data Size */
237  avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */
238  avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */
239  avio_wb24(pb, 0); /* StreamId = 0 */
240  avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
241  avio_w8(pb, 2); /* AVC end of sequence */
242  avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
243  avio_wb32(pb, 16); /* Size of FLV tag */
244 }
245 
246 static void put_amf_double(AVIOContext *pb, double d)
247 {
249  avio_wb64(pb, av_double2int(d));
250 }
251 
252 static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
253 {
254  avio_w8(pb, abyte);
255 }
256 
257 static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
258 {
260  avio_wb32(pb, dw);
261 }
262 
263 static void put_amf_bool(AVIOContext *pb, int b)
264 {
266  avio_w8(pb, !!b);
267 }
268 
269 static void write_metadata(AVFormatContext *s, unsigned int ts)
270 {
271  AVIOContext *pb = s->pb;
272  FLVContext *flv = s->priv_data;
273  int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);
274  int metadata_count = 0;
275  int64_t metadata_count_pos;
277 
278  /* write meta_tag */
279  avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
280  flv->metadata_size_pos = avio_tell(pb);
281  avio_wb24(pb, 0); // size of data part (sum of all parts below)
282  avio_wb24(pb, ts); // timestamp
283  avio_wb32(pb, 0); // reserved
284 
285  /* now data of data_size size */
286 
287  /* first event name as a string */
289  put_amf_string(pb, "onMetaData"); // 12 bytes
290 
291  /* mixed array (hash) with size and string/type/data tuples */
293  metadata_count_pos = avio_tell(pb);
294  metadata_count = 4 * !!flv->video_par +
295  5 * !!flv->audio_par +
296  1 * !!flv->data_par;
297  if (write_duration_filesize) {
298  metadata_count += 2; // +2 for duration and file size
299  }
300  avio_wb32(pb, metadata_count);
301 
302  if (write_duration_filesize) {
303  put_amf_string(pb, "duration");
304  flv->duration_offset = avio_tell(pb);
305  // fill in the guessed duration, it'll be corrected later if incorrect
307  }
308 
309  if (flv->video_par) {
310  put_amf_string(pb, "width");
311  put_amf_double(pb, flv->video_par->width);
312 
313  put_amf_string(pb, "height");
314  put_amf_double(pb, flv->video_par->height);
315 
316  put_amf_string(pb, "videodatarate");
317  put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
318 
319  if (flv->framerate != 0.0) {
320  put_amf_string(pb, "framerate");
321  put_amf_double(pb, flv->framerate);
322  metadata_count++;
323  }
324 
325  put_amf_string(pb, "videocodecid");
327  }
328 
329  if (flv->audio_par) {
330  put_amf_string(pb, "audiodatarate");
331  put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
332 
333  put_amf_string(pb, "audiosamplerate");
335 
336  put_amf_string(pb, "audiosamplesize");
337  put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
338 
339  put_amf_string(pb, "stereo");
340  put_amf_bool(pb, flv->audio_par->channels == 2);
341 
342  put_amf_string(pb, "audiocodecid");
344  }
345 
346  if (flv->data_par) {
347  put_amf_string(pb, "datastream");
348  put_amf_double(pb, 0.0);
349  }
350 
352  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
353  if( !strcmp(tag->key, "width")
354  ||!strcmp(tag->key, "height")
355  ||!strcmp(tag->key, "videodatarate")
356  ||!strcmp(tag->key, "framerate")
357  ||!strcmp(tag->key, "videocodecid")
358  ||!strcmp(tag->key, "audiodatarate")
359  ||!strcmp(tag->key, "audiosamplerate")
360  ||!strcmp(tag->key, "audiosamplesize")
361  ||!strcmp(tag->key, "stereo")
362  ||!strcmp(tag->key, "audiocodecid")
363  ||!strcmp(tag->key, "duration")
364  ||!strcmp(tag->key, "onMetaData")
365  ||!strcmp(tag->key, "datasize")
366  ||!strcmp(tag->key, "lasttimestamp")
367  ||!strcmp(tag->key, "totalframes")
368  ||!strcmp(tag->key, "hasAudio")
369  ||!strcmp(tag->key, "hasVideo")
370  ||!strcmp(tag->key, "hasCuePoints")
371  ||!strcmp(tag->key, "hasMetadata")
372  ||!strcmp(tag->key, "hasKeyframes")
373  ){
374  av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
375  continue;
376  }
377  put_amf_string(pb, tag->key);
379  put_amf_string(pb, tag->value);
380  metadata_count++;
381  }
382 
383  if (write_duration_filesize) {
384  put_amf_string(pb, "filesize");
385  flv->filesize_offset = avio_tell(pb);
386  put_amf_double(pb, 0); // delayed write
387  }
388 
389  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
390  flv->acurframeindex = 0;
391  flv->keyframe_index_size = 0;
392 
393  put_amf_string(pb, "hasVideo");
394  put_amf_bool(pb, !!flv->video_par);
395  metadata_count++;
396 
397  put_amf_string(pb, "hasKeyframes");
398  put_amf_bool(pb, 1);
399  metadata_count++;
400 
401  put_amf_string(pb, "hasAudio");
402  put_amf_bool(pb, !!flv->audio_par);
403  metadata_count++;
404 
405  put_amf_string(pb, "hasMetadata");
406  put_amf_bool(pb, 1);
407  metadata_count++;
408 
409  put_amf_string(pb, "canSeekToEnd");
410  put_amf_bool(pb, 1);
411  metadata_count++;
412 
413  put_amf_string(pb, "datasize");
414  flv->datasize_offset = avio_tell(pb);
415  flv->datasize = 0;
416  put_amf_double(pb, flv->datasize);
417  metadata_count++;
418 
419  put_amf_string(pb, "videosize");
420  flv->videosize_offset = avio_tell(pb);
421  flv->videosize = 0;
422  put_amf_double(pb, flv->videosize);
423  metadata_count++;
424 
425  put_amf_string(pb, "audiosize");
426  flv->audiosize_offset = avio_tell(pb);
427  flv->audiosize = 0;
428  put_amf_double(pb, flv->audiosize);
429  metadata_count++;
430 
431  put_amf_string(pb, "lasttimestamp");
432  flv->lasttimestamp_offset = avio_tell(pb);
433  flv->lasttimestamp = 0;
434  put_amf_double(pb, 0);
435  metadata_count++;
436 
437  put_amf_string(pb, "lastkeyframetimestamp");
439  flv->lastkeyframetimestamp = 0;
440  put_amf_double(pb, 0);
441  metadata_count++;
442 
443  put_amf_string(pb, "lastkeyframelocation");
445  flv->lastkeyframelocation = 0;
446  put_amf_double(pb, 0);
447  metadata_count++;
448 
449  put_amf_string(pb, "keyframes");
451  metadata_count++;
452 
453  flv->keyframes_info_offset = avio_tell(pb);
454  }
455 
456  put_amf_string(pb, "");
458 
459  /* write total size of tag */
460  flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
461 
462  avio_seek(pb, metadata_count_pos, SEEK_SET);
463  avio_wb32(pb, metadata_count);
464 
465  avio_seek(pb, flv->metadata_size_pos, SEEK_SET);
466  avio_wb24(pb, flv->metadata_totalsize);
467  avio_skip(pb, flv->metadata_totalsize + 10 - 3);
469  avio_wb32(pb, flv->metadata_totalsize + 11);
470 }
471 
473  const char* type, int codec_id)
474 {
475  const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
476  av_log(s, AV_LOG_ERROR,
477  "%s codec %s not compatible with flv\n",
478  type,
479  desc ? desc->name : "unknown");
480  return AVERROR(ENOSYS);
481 }
482 
484  int64_t data_size;
485  AVIOContext *pb = s->pb;
486  FLVContext *flv = s->priv_data;
487 
488  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
489  || par->codec_id == AV_CODEC_ID_MPEG4) {
490  int64_t pos;
491  avio_w8(pb,
494  avio_wb24(pb, 0); // size patched later
495  avio_wb24(pb, 0); // ts
496  avio_w8(pb, 0); // ts ext
497  avio_wb24(pb, 0); // streamid
498  pos = avio_tell(pb);
499  if (par->codec_id == AV_CODEC_ID_AAC) {
500  avio_w8(pb, get_audio_flags(s, par));
501  avio_w8(pb, 0); // AAC sequence header
502 
503  if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
504  PutBitContext pbc;
505  int samplerate_index;
506  int channels = flv->audio_par->channels
507  - (flv->audio_par->channels == 8 ? 1 : 0);
508  uint8_t data[2];
509 
510  for (samplerate_index = 0; samplerate_index < 16;
511  samplerate_index++)
512  if (flv->audio_par->sample_rate
513  == mpeg4audio_sample_rates[samplerate_index])
514  break;
515 
516  init_put_bits(&pbc, data, sizeof(data));
517  put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
518  put_bits(&pbc, 4, samplerate_index); //sample rate index
519  put_bits(&pbc, 4, channels);
520  put_bits(&pbc, 1, 0); //frame length - 1024 samples
521  put_bits(&pbc, 1, 0); //does not depend on core coder
522  put_bits(&pbc, 1, 0); //is not extension
523  flush_put_bits(&pbc);
524 
525  avio_w8(pb, data[0]);
526  avio_w8(pb, data[1]);
527 
528  av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
529  data[0], data[1]);
530  }
531  avio_write(pb, par->extradata, par->extradata_size);
532  } else {
533  avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
534  avio_w8(pb, 0); // AVC sequence header
535  avio_wb24(pb, 0); // composition time
537  }
538  data_size = avio_tell(pb) - pos;
539  avio_seek(pb, -data_size - 10, SEEK_CUR);
540  avio_wb24(pb, data_size);
541  avio_skip(pb, data_size + 10 - 3);
542  avio_wb32(pb, data_size + 11); // previous tag size
543  }
544 }
545 
546 static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
547 {
548  FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
549 
550  if (!position) {
551  av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
552  return AVERROR(ENOMEM);
553  }
554 
555  position->keyframe_timestamp = ts;
556  position->keyframe_position = pos;
557 
558  if (!flv->filepositions_count) {
559  flv->filepositions = position;
560  flv->head_filepositions = flv->filepositions;
561  position->next = NULL;
562  } else {
563  flv->filepositions->next = position;
564  position->next = NULL;
565  flv->filepositions = flv->filepositions->next;
566  }
567 
568  flv->filepositions_count++;
569 
570  return 0;
571 }
572 
574 {
575  int ret = 0;
576  int n = 0;
577  int64_t metadata_size = 0;
578  FLVContext *flv = s->priv_data;
579  int64_t pos, pos_end = avio_tell(s->pb);
580  uint8_t *buf, *read_buf[2];
581  int read_buf_id = 0;
582  int read_size[2];
583  AVIOContext *read_pb;
584 
585  metadata_size = flv->filepositions_count * 9 * 2 + 10; /* filepositions and times value */
586  metadata_size += 2 + 13; /* filepositions String */
587  metadata_size += 2 + 5; /* times String */
588  metadata_size += 3; /* Object end */
589 
590  flv->keyframe_index_size = metadata_size;
591 
592  if (metadata_size < 0)
593  return metadata_size;
594 
595  buf = av_malloc_array(metadata_size, 2);
596  if (!buf) {
597  return AVERROR(ENOMEM);
598  }
599  read_buf[0] = buf;
600  read_buf[1] = buf + metadata_size;
601 
602  avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
603  avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
604 
605  avio_seek(s->pb, flv->metadata_totalsize_pos, SEEK_SET);
606  avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
607  avio_seek(s->pb, pos_end, SEEK_SET);
608 
609  /* Shift the data: the AVIO context of the output can only be used for
610  * writing, so we re-open the same output, but for reading. It also avoids
611  * a read/seek/write/seek back and forth. */
612  avio_flush(s->pb);
613  ret = s->io_open(s, &read_pb, s->filename, AVIO_FLAG_READ, NULL);
614  if (ret < 0) {
615  av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
616  "the second pass (add_keyframe_index)\n", s->filename);
617  goto end;
618  }
619 
620  /* mark the end of the shift to up to the last data we wrote, and get ready
621  * for writing */
622  pos_end = avio_tell(s->pb);
623  avio_seek(s->pb, flv->keyframes_info_offset + metadata_size, SEEK_SET);
624 
625  /* start reading at where the keyframe index information will be placed */
626  avio_seek(read_pb, flv->keyframes_info_offset, SEEK_SET);
627  pos = avio_tell(read_pb);
628 
629  /* shift data by chunk of at most keyframe *filepositions* and *times* size */
630  read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
631  read_buf_id ^= 1;
632  do {
633 
634  read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
635  read_buf_id ^= 1;
636  n = read_size[read_buf_id];
637  if (n < 0)
638  break;
639  avio_write(s->pb, read_buf[read_buf_id], n);
640  pos += n;
641  } while (pos <= pos_end);
642 
643  ff_format_io_close(s, &read_pb);
644 
645 end:
646  av_free(buf);
647  return ret;
648 }
649 
650 
652 {
653  int i;
654  AVIOContext *pb = s->pb;
655  FLVContext *flv = s->priv_data;
656 
657  for (i = 0; i < s->nb_streams; i++) {
658  AVCodecParameters *par = s->streams[i]->codecpar;
659  FLVStreamContext *sc;
660  switch (par->codec_type) {
661  case AVMEDIA_TYPE_VIDEO:
662  if (s->streams[i]->avg_frame_rate.den &&
663  s->streams[i]->avg_frame_rate.num) {
664  flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
665  }
666  if (flv->video_par) {
667  av_log(s, AV_LOG_ERROR,
668  "at most one video stream is supported in flv\n");
669  return AVERROR(EINVAL);
670  }
671  flv->video_par = par;
672  if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
673  return unsupported_codec(s, "Video", par->codec_id);
674 
675  if (par->codec_id == AV_CODEC_ID_MPEG4 ||
676  par->codec_id == AV_CODEC_ID_H263) {
678  av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
679  "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
680 
681  if (error) {
682  av_log(s, AV_LOG_ERROR,
683  "use vstrict=-1 / -strict -1 to use it anyway.\n");
684  return AVERROR(EINVAL);
685  }
686  } else if (par->codec_id == AV_CODEC_ID_VP6) {
688  "Muxing VP6 in flv will produce flipped video on playback.\n");
689  }
690  break;
691  case AVMEDIA_TYPE_AUDIO:
692  if (flv->audio_par) {
693  av_log(s, AV_LOG_ERROR,
694  "at most one audio stream is supported in flv\n");
695  return AVERROR(EINVAL);
696  }
697  flv->audio_par = par;
698  if (get_audio_flags(s, par) < 0)
699  return unsupported_codec(s, "Audio", par->codec_id);
700  if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
702  "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
703  break;
704  case AVMEDIA_TYPE_DATA:
705  if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
706  return unsupported_codec(s, "Data", par->codec_id);
707  flv->data_par = par;
708  break;
710  if (par->codec_id != AV_CODEC_ID_TEXT) {
711  av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
712  avcodec_get_name(par->codec_id), i);
713  return AVERROR_INVALIDDATA;
714  }
715  flv->data_par = par;
716  break;
717  default:
718  av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
720  return AVERROR(EINVAL);
721  }
722  avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
723 
724  sc = av_mallocz(sizeof(FLVStreamContext));
725  if (!sc)
726  return AVERROR(ENOMEM);
727  s->streams[i]->priv_data = sc;
728  sc->last_ts = -1;
729  }
730 
731  flv->delay = AV_NOPTS_VALUE;
732 
733  avio_write(pb, "FLV", 3);
734  avio_w8(pb, 1);
737  avio_wb32(pb, 9);
738  avio_wb32(pb, 0);
739 
740  for (i = 0; i < s->nb_streams; i++)
741  if (s->streams[i]->codecpar->codec_tag == 5) {
742  avio_w8(pb, 8); // message type
743  avio_wb24(pb, 0); // include flags
744  avio_wb24(pb, 0); // time stamp
745  avio_wb32(pb, 0); // reserved
746  avio_wb32(pb, 11); // size
747  flv->reserved = 5;
748  }
749 
750  if (flv->flags & FLV_NO_METADATA) {
751  pb->seekable = 0;
752  } else {
753  write_metadata(s, 0);
754  }
755 
756  for (i = 0; i < s->nb_streams; i++) {
758  }
759 
760  flv->datastart_offset = avio_tell(pb);
761  return 0;
762 }
763 
765 {
766  int64_t file_size;
767  AVIOContext *pb = s->pb;
768  FLVContext *flv = s->priv_data;
769  int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
770  int i, res;
771  int64_t cur_pos = avio_tell(s->pb);
772 
773  if (build_keyframes_idx) {
774  FLVFileposition *newflv_posinfo, *p;
775 
776  avio_seek(pb, flv->videosize_offset, SEEK_SET);
777  put_amf_double(pb, flv->videosize);
778 
779  avio_seek(pb, flv->audiosize_offset, SEEK_SET);
780  put_amf_double(pb, flv->audiosize);
781 
782  avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
783  put_amf_double(pb, flv->lasttimestamp);
784 
785  avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
787 
788  avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
790  avio_seek(pb, cur_pos, SEEK_SET);
791 
792  res = shift_data(s);
793  if (res < 0) {
794  goto end;
795  }
796  avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
797  put_amf_string(pb, "filepositions");
799  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
800  put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
801  }
802 
803  put_amf_string(pb, "times");
805  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
806  put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
807  }
808 
809  newflv_posinfo = flv->head_filepositions;
810  while (newflv_posinfo) {
811  p = newflv_posinfo->next;
812  if (p) {
813  newflv_posinfo->next = p->next;
814  av_free(p);
815  p = NULL;
816  } else {
817  av_free(newflv_posinfo);
818  newflv_posinfo = NULL;
819  }
820  }
821 
822  put_amf_string(pb, "");
824 
825  avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
826  }
827 
828 end:
829  if (flv->flags & FLV_NO_SEQUENCE_END) {
830  av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
831  } else {
832  /* Add EOS tag */
833  for (i = 0; i < s->nb_streams; i++) {
834  AVCodecParameters *par = s->streams[i]->codecpar;
835  FLVStreamContext *sc = s->streams[i]->priv_data;
836  if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
838  put_avc_eos_tag(pb, sc->last_ts);
839  }
840  }
841 
842  file_size = avio_tell(pb);
843 
844  if (build_keyframes_idx) {
845  flv->datasize = file_size - flv->datastart_offset;
846  avio_seek(pb, flv->datasize_offset, SEEK_SET);
847  put_amf_double(pb, flv->datasize);
848  }
849  if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
850  /* update information */
851  if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
852  av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
853  } else {
854  put_amf_double(pb, flv->duration / (double)1000);
855  }
856  if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) {
857  av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
858  } else {
859  put_amf_double(pb, file_size);
860  }
861  }
862  avio_seek(pb, file_size, SEEK_SET);
863  return 0;
864 }
865 
867 {
868  AVIOContext *pb = s->pb;
870  FLVContext *flv = s->priv_data;
872  unsigned ts;
873  int size = pkt->size;
874  uint8_t *data = NULL;
875  int flags = -1, flags_size, ret;
876  int64_t cur_offset = avio_tell(pb);
877 
878  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
880  flags_size = 2;
881  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
882  flags_size = 5;
883  else
884  flags_size = 1;
885 
886  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
887  || par->codec_id == AV_CODEC_ID_MPEG4) {
888  int side_size = 0;
890  if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
891  av_free(par->extradata);
893  memcpy(par->extradata, side, side_size);
894  par->extradata_size = side_size;
895  flv_write_codec_header(s, par);
896  }
897  }
898 
899  if (flv->delay == AV_NOPTS_VALUE)
900  flv->delay = -pkt->dts;
901 
902  if (pkt->dts < -flv->delay) {
904  "Packets are not in the proper order with respect to DTS\n");
905  return AVERROR(EINVAL);
906  }
907 
908  ts = pkt->dts;
909 
911  write_metadata(s, ts);
913  }
914 
917 
918  switch (par->codec_type) {
919  case AVMEDIA_TYPE_VIDEO:
921 
922  flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
923 
925  break;
926  case AVMEDIA_TYPE_AUDIO:
927  flags = get_audio_flags(s, par);
928 
929  av_assert0(size);
930 
932  break;
934  case AVMEDIA_TYPE_DATA:
936  break;
937  default:
938  return AVERROR(EINVAL);
939  }
940 
941  if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
942  /* check if extradata looks like mp4 formatted */
943  if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
944  if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
945  return ret;
946  } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
947  (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
948  if (!s->streams[pkt->stream_index]->nb_frames) {
949  av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
950  "use the audio bitstream filter 'aac_adtstoasc' to fix it "
951  "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
952  return AVERROR_INVALIDDATA;
953  }
954  av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
955  }
956 
957  /* check Speex packet duration */
958  if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
959  av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
960  "8 frames per packet. Adobe Flash "
961  "Player cannot handle this!\n");
962 
963  if (sc->last_ts < ts)
964  sc->last_ts = ts;
965 
966  if (size + flags_size >= 1<<24) {
967  av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
968  size + flags_size, 1<<24);
969  return AVERROR(EINVAL);
970  }
971 
972  avio_wb24(pb, size + flags_size);
973  avio_wb24(pb, ts & 0xFFFFFF);
974  avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
975  avio_wb24(pb, flv->reserved);
976 
977  if (par->codec_type == AVMEDIA_TYPE_DATA ||
979  int data_size;
980  int64_t metadata_size_pos = avio_tell(pb);
981  if (par->codec_id == AV_CODEC_ID_TEXT) {
982  // legacy FFmpeg magic?
984  put_amf_string(pb, "onTextData");
986  avio_wb32(pb, 2);
987  put_amf_string(pb, "type");
989  put_amf_string(pb, "Text");
990  put_amf_string(pb, "text");
992  put_amf_string(pb, pkt->data);
993  put_amf_string(pb, "");
995  } else {
996  // just pass the metadata through
997  avio_write(pb, data ? data : pkt->data, size);
998  }
999  /* write total size of tag */
1000  data_size = avio_tell(pb) - metadata_size_pos;
1001  avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
1002  avio_wb24(pb, data_size);
1003  avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
1004  avio_wb32(pb, data_size + 11);
1005  } else {
1006  av_assert1(flags>=0);
1007  avio_w8(pb,flags);
1008  if (par->codec_id == AV_CODEC_ID_VP6)
1009  avio_w8(pb,0);
1010  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
1011  if (par->extradata_size)
1012  avio_w8(pb, par->extradata[0]);
1013  else
1014  avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
1015  (FFALIGN(par->height, 16) - par->height));
1016  } else if (par->codec_id == AV_CODEC_ID_AAC)
1017  avio_w8(pb, 1); // AAC raw
1018  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
1019  avio_w8(pb, 1); // AVC NALU
1020  avio_wb24(pb, pkt->pts - pkt->dts);
1021  }
1022 
1023  avio_write(pb, data ? data : pkt->data, size);
1024 
1025  avio_wb32(pb, size + flags_size + 11); // previous tag size
1026  flv->duration = FFMAX(flv->duration,
1027  pkt->pts + flv->delay + pkt->duration);
1028  }
1029 
1030  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
1031  switch (par->codec_type) {
1032  case AVMEDIA_TYPE_VIDEO:
1033  flv->videosize += (avio_tell(pb) - cur_offset);
1034  flv->lasttimestamp = flv->acurframeindex / flv->framerate;
1035  if (pkt->flags & AV_PKT_FLAG_KEY) {
1036  double ts = flv->acurframeindex / flv->framerate;
1037  int64_t pos = cur_offset;
1038 
1039  flv->lastkeyframetimestamp = flv->acurframeindex / flv->framerate;
1040  flv->lastkeyframelocation = pos;
1041  flv_append_keyframe_info(s, flv, ts, pos);
1042  }
1043  flv->acurframeindex++;
1044  break;
1045 
1046  case AVMEDIA_TYPE_AUDIO:
1047  flv->audiosize += (avio_tell(pb) - cur_offset);
1048  break;
1049 
1050  default:
1051  av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
1052  break;
1053  }
1054  }
1055 
1056  av_free(data);
1057 
1058  return pb->error;
1059 }
1060 
1061 static const AVOption options[] = {
1062  { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1063  { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1064  { "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1065  { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1066  { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1067  { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1068  { NULL },
1069 };
1070 
1071 static const AVClass flv_muxer_class = {
1072  .class_name = "flv muxer",
1073  .item_name = av_default_item_name,
1074  .option = options,
1075  .version = LIBAVUTIL_VERSION_INT,
1076 };
1077 
1079  .name = "flv",
1080  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1081  .mime_type = "video/x-flv",
1082  .extensions = "flv",
1083  .priv_data_size = sizeof(FLVContext),
1084  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
1085  .video_codec = AV_CODEC_ID_FLV1,
1089  .codec_tag = (const AVCodecTag* const []) {
1091  },
1094  .priv_class = &flv_muxer_class,
1095 };
static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
Definition: flvenc.c:257
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:440
#define NULL
Definition: coverity.c:32
static const AVCodecTag flv_audio_codec_ids[]
Definition: flvenc.c:52
int acurframeindex
Definition: flvenc.c:108
Definition: flv.h:74
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
Buffered I/O operations.
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1008
AVOutputFormat ff_flv_muxer
Definition: flvenc.c:1078
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
double framerate
Definition: flvenc.c:117
int64_t datastart_offset
Definition: flvenc.c:88
int64_t audiosize_offset
Definition: flvenc.c:93
static void flv_write_codec_header(AVFormatContext *s, AVCodecParameters *par)
Definition: flvenc.c:483
int64_t delay
first dts delay (needed for AVC & Speex)
Definition: flvenc.c:86
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4581
const char * desc
Definition: nvenc.c:60
int64_t duration
Definition: flvenc.c:85
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3987
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1608
const char * b
Definition: vf_curves.c:113
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
#define AVIO_FLAG_READ
read-only
Definition: avio.h:606
static int unsupported_codec(AVFormatContext *s, const char *type, int codec_id)
Definition: flvenc.c:472
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
static const AVClass flv_muxer_class
Definition: flvenc.c:1071
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1629
int64_t metadata_totalsize
Definition: flvenc.c:98
void * priv_data
Definition: avformat.h:904
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3017
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
double lastkeyframetimestamp
Definition: flvenc.c:104
static AVPacket pkt
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
Definition: flvenc.c:127
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1622
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:496
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3979
int64_t keyframe_index_size
Definition: flvenc.c:99
static const AVCodecTag flv_video_codec_ids[]
Definition: flvenc.c:39
static const AVOption options[]
Definition: flvenc.c:1061
Format I/O context.
Definition: avformat.h:1338
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal metadata API header see avformat.h or the public API!
Public dictionary API.
FLVFileposition * head_filepositions
Definition: flvenc.c:113
uint8_t
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:4053
AVCodecParameters * video_par
Definition: flvenc.c:116
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1625
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5293
double keyframe_timestamp
Definition: flvenc.c:76
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:470
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1406
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:120
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
uint8_t * data
Definition: avcodec.h:1607
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1412
AVCodecParameters * audio_par
Definition: flvenc.c:115
int64_t keyframes_info_offset
Definition: flvenc.c:109
int64_t metadata_totalsize_pos
Definition: flvenc.c:97
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
int64_t lastkeyframelocation_offset
Definition: flvenc.c:105
int64_t datasize_offset
Definition: flvenc.c:89
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4016
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2905
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1639
signifies 5512Hz and 8000Hz in the case of NELLYMOSER
Definition: flv.h:83
static int flv_write_trailer(AVFormatContext *s)
Definition: flvenc.c:764
int64_t filepositions_count
Definition: flvenc.c:111
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1554
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int64_t videosize
Definition: flvenc.c:92
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3983
int64_t videosize_offset
Definition: flvenc.c:91
static const int mpeg4audio_sample_rates[16]
Definition: aacenctab.h:74
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5317
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:967
FLVFileposition * filepositions
Definition: flvenc.c:112
#define FFMAX(a, b)
Definition: common.h:94
static void error(const char *err)
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
Definition: avc.c:92
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1613
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:2977
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:4005
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1394
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
char filename[1024]
input or output filename
Definition: avformat.h:1414
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvenc.c:866
int64_t lasttimestamp_offset
Definition: flvenc.c:101
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:485
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:464
const char * name
Definition: avformat.h:524
int64_t lastkeyframelocation
Definition: flvenc.c:106
static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
Definition: flvenc.c:546
int n
Definition: avisynth_c.h:684
struct FLVFileposition * next
Definition: flvenc.c:77
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:3147
int reserved
Definition: flvenc.c:82
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1372
FLV common header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1380
static int flv_write_header(AVFormatContext *s)
Definition: flvenc.c:651
AVRational framerate
Definition: flvdec.c:72
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:182
int64_t keyframe_position
Definition: flvenc.c:75
static void put_amf_string(AVIOContext *pb, const char *str)
Definition: flvenc.c:226
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
static void put_amf_double(AVIOContext *pb, double d)
Definition: flvenc.c:246
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
Definition: ffmpeg.c:650
AVClass * av_class
Definition: flvenc.c:81
Describe the class of an AVClass context structure.
Definition: log.h:67
inter frame (for AVC, a non-seekable frame)
Definition: flv.h:116
AVCodecParameters * data_par
Definition: flvenc.c:118
int64_t lastkeyframetimestamp_offset
Definition: flvenc.c:103
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:668
int error
contains the error code or 0 if no error happened
Definition: avio.h:228
int64_t datasize
Definition: flvenc.c:90
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:660
AAC encoder data.
#define AMF_END_OF_OBJECT
Definition: flv.h:47
static void put_amf_bool(AVIOContext *pb, int b)
Definition: flvenc.c:263
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:452
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
int sample_rate
Audio only.
Definition: avcodec.h:4097
Main libavformat public API header.
int64_t audiosize
Definition: flvenc.c:94
static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
Definition: flvenc.c:252
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
int64_t duration_offset
Definition: flvenc.c:83
raw UTF-8 text
Definition: avcodec.h:606
static void write_metadata(AVFormatContext *s, unsigned int ts)
Definition: flvenc.c:269
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:4047
key frame (for AVC, a seekable frame)
Definition: flv.h:115
int flags
Definition: flvenc.c:120
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:945
char * key
Definition: dict.h:86
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
int den
Denominator.
Definition: rational.h:60
double lasttimestamp
Definition: flvenc.c:102
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:734
static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
Definition: flvenc.c:233
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:114
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:489
#define av_free(p)
char * value
Definition: dict.h:87
int len
void * priv_data
Format private data.
Definition: avformat.h:1366
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:344
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4029
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4001
int channels
Audio only.
Definition: avcodec.h:4093
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1606
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:354
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1433
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
uint8_t * av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:339
AVCodecParameters * codecpar
Definition: avformat.h:1241
#define av_malloc_array(a, b)
int64_t filesize_offset
Definition: flvenc.c:84
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3991
int64_t metadata_size_pos
Definition: flvenc.c:96
int stream_index
Definition: avcodec.h:1609
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1898
This structure stores compressed data.
Definition: avcodec.h:1584
static int shift_data(AVFormatContext *s)
Definition: flvenc.c:573
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1600
int64_t last_ts
last timestamp for each stream
Definition: flvenc.c:124
FLVFlags
Definition: flvenc.c:66
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
Definition: avc.c:106
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
bitstream writer API