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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 "avc.h"
27 #include "avformat.h"
28 #include "flv.h"
29 #include "internal.h"
30 #include "metadata.h"
31 #include "libavutil/opt.h"
32 #include "libavcodec/put_bits.h"
33 #include "libavcodec/aacenctab.h"
34 
35 
36 static const AVCodecTag flv_video_codec_ids[] = {
46  { AV_CODEC_ID_NONE, 0 }
47 };
48 
49 static const AVCodecTag flv_audio_codec_ids[] = {
60  { AV_CODEC_ID_NONE, 0 }
61 };
62 
63 typedef struct FLVContext {
65  int reserved;
66  int64_t duration_offset;
67  int64_t filesize_offset;
68  int64_t duration;
69  int64_t delay; ///< first dts delay (needed for AVC & Speex)
70 
73  double framerate;
75 
76  int flags;
77 } FLVContext;
78 
79 typedef struct FLVStreamContext {
80  int64_t last_ts; ///< last timestamp for each stream
82 
84 {
87 
88  if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
91  else if (par->codec_id == AV_CODEC_ID_SPEEX) {
92  if (par->sample_rate != 16000) {
94  "FLV only supports wideband (16kHz) Speex audio\n");
95  return AVERROR(EINVAL);
96  }
97  if (par->channels != 1) {
98  av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
99  return AVERROR(EINVAL);
100  }
102  } else {
103  switch (par->sample_rate) {
104  case 44100:
105  flags |= FLV_SAMPLERATE_44100HZ;
106  break;
107  case 22050:
108  flags |= FLV_SAMPLERATE_22050HZ;
109  break;
110  case 11025:
111  flags |= FLV_SAMPLERATE_11025HZ;
112  break;
113  case 16000: // nellymoser only
114  case 8000: // nellymoser only
115  case 5512: // not MP3
116  if (par->codec_id != AV_CODEC_ID_MP3) {
117  flags |= FLV_SAMPLERATE_SPECIAL;
118  break;
119  }
120  default:
121  av_log(s, AV_LOG_ERROR,
122  "FLV does not support sample rate %d, "
123  "choose from (44100, 22050, 11025)\n", par->sample_rate);
124  return AVERROR(EINVAL);
125  }
126  }
127 
128  if (par->channels > 1)
129  flags |= FLV_STEREO;
130 
131  switch (par->codec_id) {
132  case AV_CODEC_ID_MP3:
134  break;
135  case AV_CODEC_ID_PCM_U8:
137  break;
140  break;
143  break;
146  break;
148  if (par->sample_rate == 8000)
150  else if (par->sample_rate == 16000)
152  else
154  break;
157  break;
160  break;
161  case 0:
162  flags |= par->codec_tag << 4;
163  break;
164  default:
165  av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
166  avcodec_get_name(par->codec_id));
167  return AVERROR(EINVAL);
168  }
169 
170  return flags;
171 }
172 
173 static void put_amf_string(AVIOContext *pb, const char *str)
174 {
175  size_t len = strlen(str);
176  avio_wb16(pb, len);
177  avio_write(pb, str, len);
178 }
179 
180 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
181 {
183  avio_wb24(pb, 5); /* Tag Data Size */
184  avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */
185  avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */
186  avio_wb24(pb, 0); /* StreamId = 0 */
187  avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
188  avio_w8(pb, 2); /* AVC end of sequence */
189  avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
190  avio_wb32(pb, 16); /* Size of FLV tag */
191 }
192 
193 static void put_amf_double(AVIOContext *pb, double d)
194 {
196  avio_wb64(pb, av_double2int(d));
197 }
198 
199 static void put_amf_bool(AVIOContext *pb, int b)
200 {
202  avio_w8(pb, !!b);
203 }
204 
205 static void write_metadata(AVFormatContext *s, unsigned int ts)
206 {
207  AVIOContext *pb = s->pb;
208  FLVContext *flv = s->priv_data;
209  int metadata_count = 0;
210  int64_t metadata_size_pos, data_size, metadata_count_pos;
212 
213  /* write meta_tag */
214  avio_w8(pb, 18); // tag type META
215  metadata_size_pos = avio_tell(pb);
216  avio_wb24(pb, 0); // size of data part (sum of all parts below)
217  avio_wb24(pb, ts); // timestamp
218  avio_wb32(pb, 0); // reserved
219 
220  /* now data of data_size size */
221 
222  /* first event name as a string */
224  put_amf_string(pb, "onMetaData"); // 12 bytes
225 
226  /* mixed array (hash) with size and string/type/data tuples */
228  metadata_count_pos = avio_tell(pb);
229  metadata_count = 4 * !!flv->video_par +
230  5 * !!flv->audio_par +
231  1 * !!flv->data_par +
232  2; // +2 for duration and file size
233 
234  avio_wb32(pb, metadata_count);
235 
236  put_amf_string(pb, "duration");
237  flv->duration_offset = avio_tell(pb);
238 
239  // fill in the guessed duration, it'll be corrected later if incorrect
241 
242  if (flv->video_par) {
243  put_amf_string(pb, "width");
244  put_amf_double(pb, flv->video_par->width);
245 
246  put_amf_string(pb, "height");
247  put_amf_double(pb, flv->video_par->height);
248 
249  put_amf_string(pb, "videodatarate");
250  put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
251 
252  if (flv->framerate != 0.0) {
253  put_amf_string(pb, "framerate");
254  put_amf_double(pb, flv->framerate);
255  metadata_count++;
256  }
257 
258  put_amf_string(pb, "videocodecid");
260  }
261 
262  if (flv->audio_par) {
263  put_amf_string(pb, "audiodatarate");
264  put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
265 
266  put_amf_string(pb, "audiosamplerate");
268 
269  put_amf_string(pb, "audiosamplesize");
270  put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
271 
272  put_amf_string(pb, "stereo");
273  put_amf_bool(pb, flv->audio_par->channels == 2);
274 
275  put_amf_string(pb, "audiocodecid");
277  }
278 
279  if (flv->data_par) {
280  put_amf_string(pb, "datastream");
281  put_amf_double(pb, 0.0);
282  }
283 
285  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
286  if( !strcmp(tag->key, "width")
287  ||!strcmp(tag->key, "height")
288  ||!strcmp(tag->key, "videodatarate")
289  ||!strcmp(tag->key, "framerate")
290  ||!strcmp(tag->key, "videocodecid")
291  ||!strcmp(tag->key, "audiodatarate")
292  ||!strcmp(tag->key, "audiosamplerate")
293  ||!strcmp(tag->key, "audiosamplesize")
294  ||!strcmp(tag->key, "stereo")
295  ||!strcmp(tag->key, "audiocodecid")
296  ||!strcmp(tag->key, "duration")
297  ||!strcmp(tag->key, "onMetaData")
298  ||!strcmp(tag->key, "datasize")
299  ||!strcmp(tag->key, "lasttimestamp")
300  ||!strcmp(tag->key, "totalframes")
301  ||!strcmp(tag->key, "hasAudio")
302  ||!strcmp(tag->key, "hasVideo")
303  ||!strcmp(tag->key, "hasCuePoints")
304  ||!strcmp(tag->key, "hasMetadata")
305  ||!strcmp(tag->key, "hasKeyframes")
306  ){
307  av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
308  continue;
309  }
310  put_amf_string(pb, tag->key);
312  put_amf_string(pb, tag->value);
313  metadata_count++;
314  }
315 
316  put_amf_string(pb, "filesize");
317  flv->filesize_offset = avio_tell(pb);
318  put_amf_double(pb, 0); // delayed write
319 
320  put_amf_string(pb, "");
322 
323  /* write total size of tag */
324  data_size = avio_tell(pb) - metadata_size_pos - 10;
325 
326  avio_seek(pb, metadata_count_pos, SEEK_SET);
327  avio_wb32(pb, metadata_count);
328 
329  avio_seek(pb, metadata_size_pos, SEEK_SET);
330  avio_wb24(pb, data_size);
331  avio_skip(pb, data_size + 10 - 3);
332  avio_wb32(pb, data_size + 11);
333 }
334 
336  const char* type, int codec_id)
337 {
338  const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
339  av_log(s, AV_LOG_ERROR,
340  "%s codec %s not compatible with flv\n",
341  type,
342  desc ? desc->name : "unknown");
343  return AVERROR(ENOSYS);
344 }
345 
347 {
348  int i;
349  AVIOContext *pb = s->pb;
350  FLVContext *flv = s->priv_data;
351  int64_t data_size;
352 
353  for (i = 0; i < s->nb_streams; i++) {
354  AVCodecParameters *par = s->streams[i]->codecpar;
355  FLVStreamContext *sc;
356  switch (par->codec_type) {
357  case AVMEDIA_TYPE_VIDEO:
358  if (s->streams[i]->avg_frame_rate.den &&
359  s->streams[i]->avg_frame_rate.num) {
360  flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
361  }
362  if (flv->video_par) {
363  av_log(s, AV_LOG_ERROR,
364  "at most one video stream is supported in flv\n");
365  return AVERROR(EINVAL);
366  }
367  flv->video_par = par;
368  if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
369  return unsupported_codec(s, "Video", par->codec_id);
370 
371  if (par->codec_id == AV_CODEC_ID_MPEG4 ||
372  par->codec_id == AV_CODEC_ID_H263) {
374  av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
375  "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
376 
377  if (error) {
378  av_log(s, AV_LOG_ERROR,
379  "use vstrict=-1 / -strict -1 to use it anyway.\n");
380  return AVERROR(EINVAL);
381  }
382  } else if (par->codec_id == AV_CODEC_ID_VP6) {
384  "Muxing VP6 in flv will produce flipped video on playback.\n");
385  }
386  break;
387  case AVMEDIA_TYPE_AUDIO:
388  if (flv->audio_par) {
389  av_log(s, AV_LOG_ERROR,
390  "at most one audio stream is supported in flv\n");
391  return AVERROR(EINVAL);
392  }
393  flv->audio_par = par;
394  if (get_audio_flags(s, par) < 0)
395  return unsupported_codec(s, "Audio", par->codec_id);
396  if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
398  "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
399  break;
400  case AVMEDIA_TYPE_DATA:
401  if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
402  return unsupported_codec(s, "Data", par->codec_id);
403  flv->data_par = par;
404  break;
406  if (par->codec_id != AV_CODEC_ID_TEXT) {
407  av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
408  avcodec_get_name(par->codec_id), i);
409  return AVERROR_INVALIDDATA;
410  }
411  flv->data_par = par;
412  break;
413  default:
414  av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
416  return AVERROR(EINVAL);
417  }
418  avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
419 
420  sc = av_mallocz(sizeof(FLVStreamContext));
421  if (!sc)
422  return AVERROR(ENOMEM);
423  s->streams[i]->priv_data = sc;
424  sc->last_ts = -1;
425  }
426 
427  flv->delay = AV_NOPTS_VALUE;
428 
429  avio_write(pb, "FLV", 3);
430  avio_w8(pb, 1);
433  avio_wb32(pb, 9);
434  avio_wb32(pb, 0);
435 
436  for (i = 0; i < s->nb_streams; i++)
437  if (s->streams[i]->codecpar->codec_tag == 5) {
438  avio_w8(pb, 8); // message type
439  avio_wb24(pb, 0); // include flags
440  avio_wb24(pb, 0); // time stamp
441  avio_wb32(pb, 0); // reserved
442  avio_wb32(pb, 11); // size
443  flv->reserved = 5;
444  }
445 
446  write_metadata(s, 0);
447 
448  for (i = 0; i < s->nb_streams; i++) {
449  AVCodecParameters *par = s->streams[i]->codecpar;
450  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
451  int64_t pos;
454  avio_wb24(pb, 0); // size patched later
455  avio_wb24(pb, 0); // ts
456  avio_w8(pb, 0); // ts ext
457  avio_wb24(pb, 0); // streamid
458  pos = avio_tell(pb);
459  if (par->codec_id == AV_CODEC_ID_AAC) {
460  avio_w8(pb, get_audio_flags(s, par));
461  avio_w8(pb, 0); // AAC sequence header
462 
463  if (!par->extradata_size && flv->flags & 1) {
464  PutBitContext pbc;
465  int samplerate_index;
466  int channels = flv->audio_par->channels - (flv->audio_par->channels == 8 ? 1 : 0);
467  uint8_t data[2];
468 
469  for (samplerate_index = 0; samplerate_index < 16; samplerate_index++)
470  if (flv->audio_par->sample_rate == mpeg4audio_sample_rates[samplerate_index])
471  break;
472 
473  init_put_bits(&pbc, data, sizeof(data));
474  put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
475  put_bits(&pbc, 4, samplerate_index); //sample rate index
476  put_bits(&pbc, 4, channels);
477  put_bits(&pbc, 1, 0); //frame length - 1024 samples
478  put_bits(&pbc, 1, 0); //does not depend on core coder
479  put_bits(&pbc, 1, 0); //is not extension
480  flush_put_bits(&pbc);
481 
482  avio_w8(pb, data[0]);
483  avio_w8(pb, data[1]);
484 
485  av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n", data[0], data[1]);
486  }
487  avio_write(pb, par->extradata, par->extradata_size);
488  } else {
489  avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
490  avio_w8(pb, 0); // AVC sequence header
491  avio_wb24(pb, 0); // composition time
493  }
494  data_size = avio_tell(pb) - pos;
495  avio_seek(pb, -data_size - 10, SEEK_CUR);
496  avio_wb24(pb, data_size);
497  avio_skip(pb, data_size + 10 - 3);
498  avio_wb32(pb, data_size + 11); // previous tag size
499  }
500  }
501 
502  return 0;
503 }
504 
506 {
507  int64_t file_size;
508 
509  AVIOContext *pb = s->pb;
510  FLVContext *flv = s->priv_data;
511  int i;
512 
513  /* Add EOS tag */
514  for (i = 0; i < s->nb_streams; i++) {
515  AVCodecParameters *par = s->streams[i]->codecpar;
516  FLVStreamContext *sc = s->streams[i]->priv_data;
517  if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
519  put_avc_eos_tag(pb, sc->last_ts);
520  }
521 
522  file_size = avio_tell(pb);
523 
524  /* update information */
525  if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0)
526  av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
527  else
528  put_amf_double(pb, flv->duration / (double)1000);
529  if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0)
530  av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
531  else
532  put_amf_double(pb, file_size);
533 
534  avio_seek(pb, file_size, SEEK_SET);
535  return 0;
536 }
537 
539 {
540  AVIOContext *pb = s->pb;
542  FLVContext *flv = s->priv_data;
544  unsigned ts;
545  int size = pkt->size;
546  uint8_t *data = NULL;
547  int flags = -1, flags_size, ret;
548 
549  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
551  flags_size = 2;
552  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
553  flags_size = 5;
554  else
555  flags_size = 1;
556 
557  if (flv->delay == AV_NOPTS_VALUE)
558  flv->delay = -pkt->dts;
559 
560  if (pkt->dts < -flv->delay) {
562  "Packets are not in the proper order with respect to DTS\n");
563  return AVERROR(EINVAL);
564  }
565 
566  ts = pkt->dts;
567 
569  write_metadata(s, ts);
571  }
572 
573  switch (par->codec_type) {
574  case AVMEDIA_TYPE_VIDEO:
576 
577  flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
578 
580  break;
581  case AVMEDIA_TYPE_AUDIO:
582  flags = get_audio_flags(s, par);
583 
584  av_assert0(size);
585 
587  break;
589  case AVMEDIA_TYPE_DATA:
591  break;
592  default:
593  return AVERROR(EINVAL);
594  }
595 
596  if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
597  /* check if extradata looks like mp4 formatted */
598  if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
599  if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
600  return ret;
601  } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
602  (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
603  if (!s->streams[pkt->stream_index]->nb_frames) {
604  av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
605  "use the audio bitstream filter 'aac_adtstoasc' to fix it "
606  "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
607  return AVERROR_INVALIDDATA;
608  }
609  av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
610  }
611 
612  /* check Speex packet duration */
613  if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
614  av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
615  "8 frames per packet. Adobe Flash "
616  "Player cannot handle this!\n");
617 
618  if (sc->last_ts < ts)
619  sc->last_ts = ts;
620 
621  if (size + flags_size >= 1<<24) {
622  av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
623  size + flags_size, 1<<24);
624  return AVERROR(EINVAL);
625  }
626 
627  avio_wb24(pb, size + flags_size);
628  avio_wb24(pb, ts & 0xFFFFFF);
629  avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
630  avio_wb24(pb, flv->reserved);
631 
632  if (par->codec_type == AVMEDIA_TYPE_DATA ||
634  int data_size;
635  int64_t metadata_size_pos = avio_tell(pb);
636  if (par->codec_id == AV_CODEC_ID_TEXT) {
637  // legacy FFmpeg magic?
639  put_amf_string(pb, "onTextData");
641  avio_wb32(pb, 2);
642  put_amf_string(pb, "type");
644  put_amf_string(pb, "Text");
645  put_amf_string(pb, "text");
647  put_amf_string(pb, pkt->data);
648  put_amf_string(pb, "");
650  } else {
651  // just pass the metadata through
652  avio_write(pb, data ? data : pkt->data, size);
653  }
654  /* write total size of tag */
655  data_size = avio_tell(pb) - metadata_size_pos;
656  avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
657  avio_wb24(pb, data_size);
658  avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
659  avio_wb32(pb, data_size + 11);
660  } else {
661  av_assert1(flags>=0);
662  avio_w8(pb,flags);
663  if (par->codec_id == AV_CODEC_ID_VP6)
664  avio_w8(pb,0);
665  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
666  if (par->extradata_size)
667  avio_w8(pb, par->extradata[0]);
668  else
669  avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
670  (FFALIGN(par->height, 16) - par->height));
671  } else if (par->codec_id == AV_CODEC_ID_AAC)
672  avio_w8(pb, 1); // AAC raw
673  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
674  avio_w8(pb, 1); // AVC NALU
675  avio_wb24(pb, pkt->pts - pkt->dts);
676  }
677 
678  avio_write(pb, data ? data : pkt->data, size);
679 
680  avio_wb32(pb, size + flags_size + 11); // previous tag size
681  flv->duration = FFMAX(flv->duration,
682  pkt->pts + flv->delay + pkt->duration);
683  }
684 
685  av_free(data);
686 
687  return pb->error;
688 }
689 
690 static const AVOption options[] = {
691  { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
692  { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = 1}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
693  { NULL },
694 };
695 
696 static const AVClass flv_muxer_class = {
697  .class_name = "flv muxer",
698  .item_name = av_default_item_name,
699  .option = options,
700  .version = LIBAVUTIL_VERSION_INT,
701 };
702 
704  .name = "flv",
705  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
706  .mime_type = "video/x-flv",
707  .extensions = "flv",
708  .priv_data_size = sizeof(FLVContext),
709  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
710  .video_codec = AV_CODEC_ID_FLV1,
714  .codec_tag = (const AVCodecTag* const []) {
716  },
719  .priv_class = &flv_muxer_class,
720 };
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:423
#define NULL
Definition: coverity.c:32
static const AVCodecTag flv_audio_codec_ids[]
Definition: flvenc.c:49
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:995
AVOutputFormat ff_flv_muxer
Definition: flvenc.c:703
AVOption.
Definition: opt.h:245
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
double framerate
Definition: flvenc.c:73
int64_t delay
first dts delay (needed for AVC & Speex)
Definition: flvenc.c:69
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:70
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:4404
const char * desc
Definition: nvenc.c:237
int64_t duration
Definition: flvenc.c:68
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3915
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1578
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
static int unsupported_codec(AVFormatContext *s, const char *type, int codec_id)
Definition: flvenc.c:335
inter frame (for AVC, a non-seekable frame)
Definition: flv.h:116
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:696
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1608
void * priv_data
Definition: avformat.h:891
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:287
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:2934
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:83
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1601
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:494
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3907
static const AVCodecTag flv_video_codec_ids[]
Definition: flvenc.c:36
static const AVOption options[]
Definition: flvenc.c:690
Format I/O context.
Definition: avformat.h:1319
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.
uint8_t
Opaque data information usually continuous.
Definition: avutil.h:195
int width
Video only.
Definition: avcodec.h:3981
AVCodecParameters * video_par
Definition: flvenc.c:72
AVOptions.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1595
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
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:39
uint8_t * data
Definition: avcodec.h:1577
uint32_t tag
Definition: movenc.c:1353
AVCodecParameters * audio_par
Definition: flvenc.c:71
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:447
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:187
#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:275
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3944
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2863
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
static int flv_write_trailer(AVFormatContext *s)
Definition: flvenc.c:505
#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:1533
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
#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:512
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3911
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:5068
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
#define FFMAX(a, b)
Definition: common.h:94
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:1583
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:2935
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3933
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1375
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvenc.c:538
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:483
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:447
const char * name
Definition: avformat.h:522
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:3075
int reserved
Definition: flvenc.c:65
FLV common header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
static int flv_write_header(AVFormatContext *s)
Definition: flvenc.c:346
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:165
static void put_amf_string(AVIOContext *pb, const char *str)
Definition: flvenc.c:173
GLint GLenum type
Definition: opengl_enc.c:105
static void put_amf_double(AVIOContext *pb, double d)
Definition: flvenc.c:193
AVClass * av_class
Definition: flvenc.c:64
Describe the class of an AVClass context structure.
Definition: log.h:67
AVCodecParameters * data_par
Definition: flvenc.c:74
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:662
int error
contains the error code or 0 if no error happened
Definition: avio.h:192
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:654
AAC encoder data.
#define AMF_END_OF_OBJECT
Definition: flv.h:47
static void put_amf_bool(AVIOContext *pb, int b)
Definition: flvenc.c:199
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:435
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
static int flags
Definition: cpu.c:47
int sample_rate
Audio only.
Definition: avcodec.h:4025
Main libavformat public API header.
Definition: flv.h:74
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:66
raw UTF-8 text
Definition: avcodec.h:601
static void write_metadata(AVFormatContext *s, unsigned int ts)
Definition: flvenc.c:205
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:3975
int flags
Definition: flvenc.c:76
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:932
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:45
static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
Definition: flvenc.c:180
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:487
#define av_free(p)
char * value
Definition: dict.h:87
int len
void * priv_data
Format private data.
Definition: avformat.h:1347
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:497
signifies 5512Hz and 8000Hz in the case of NELLYMOSER
Definition: flv.h:83
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3957
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3929
int channels
Audio only.
Definition: avcodec.h:4021
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1576
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:337
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1414
#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
AVCodecParameters * codecpar
Definition: avformat.h:1006
int64_t filesize_offset
Definition: flvenc.c:67
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3919
int stream_index
Definition: avcodec.h:1579
key frame (for AVC, a seekable frame)
Definition: flv.h:115
This structure stores compressed data.
Definition: avcodec.h:1554
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1570
int64_t last_ts
last timestamp for each stream
Definition: flvenc.c:80
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:240
bitstream writer API