3 * Copyright (c) 2003 The FFmpeg Project
5 * This file is part of FFmpeg.
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.
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.
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
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"
32 #include "libavutil/opt.h"
33 #include "libavcodec/put_bits.h"
34 #include "libavcodec/aacenctab.h"
37 static const AVCodecTag flv_video_codec_ids[] = {
38 { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
39 { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
40 { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
41 { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
42 { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
43 { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
44 { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
45 { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
46 { AV_CODEC_ID_H264, FLV_CODECID_H264 },
47 { AV_CODEC_ID_NONE, 0 }
50 static const AVCodecTag flv_audio_codec_ids[] = {
51 { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
52 { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
53 { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
54 { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
55 { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
56 { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
57 { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
58 { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
59 { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
60 { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
61 { AV_CODEC_ID_NONE, 0 }
65 FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
68 typedef struct FLVContext {
71 int64_t duration_offset;
72 int64_t filesize_offset;
74 int64_t delay; ///< first dts delay (needed for AVC & Speex)
76 AVCodecParameters *audio_par;
77 AVCodecParameters *video_par;
79 AVCodecParameters *data_par;
84 typedef struct FLVStreamContext {
85 int64_t last_ts; ///< last timestamp for each stream
88 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
90 int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
91 : FLV_SAMPLESSIZE_8BIT;
93 if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
94 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
95 FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
96 else if (par->codec_id == AV_CODEC_ID_SPEEX) {
97 if (par->sample_rate != 16000) {
98 av_log(s, AV_LOG_ERROR,
99 "FLV only supports wideband (16kHz) Speex audio\n");
100 return AVERROR(EINVAL);
102 if (par->channels != 1) {
103 av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
104 return AVERROR(EINVAL);
106 return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
108 switch (par->sample_rate) {
110 flags |= FLV_SAMPLERATE_44100HZ;
113 flags |= FLV_SAMPLERATE_22050HZ;
116 flags |= FLV_SAMPLERATE_11025HZ;
118 case 16000: // nellymoser only
119 case 8000: // nellymoser only
120 case 5512: // not MP3
121 if (par->codec_id != AV_CODEC_ID_MP3) {
122 flags |= FLV_SAMPLERATE_SPECIAL;
126 av_log(s, AV_LOG_ERROR,
127 "FLV does not support sample rate %d, "
128 "choose from (44100, 22050, 11025)\n", par->sample_rate);
129 return AVERROR(EINVAL);
133 if (par->channels > 1)
136 switch (par->codec_id) {
137 case AV_CODEC_ID_MP3:
138 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
140 case AV_CODEC_ID_PCM_U8:
141 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
143 case AV_CODEC_ID_PCM_S16BE:
144 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
146 case AV_CODEC_ID_PCM_S16LE:
147 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
149 case AV_CODEC_ID_ADPCM_SWF:
150 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
152 case AV_CODEC_ID_NELLYMOSER:
153 if (par->sample_rate == 8000)
154 flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
155 else if (par->sample_rate == 16000)
156 flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
158 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
160 case AV_CODEC_ID_PCM_MULAW:
161 flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
163 case AV_CODEC_ID_PCM_ALAW:
164 flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
167 flags |= par->codec_tag << 4;
170 av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
171 avcodec_get_name(par->codec_id));
172 return AVERROR(EINVAL);
178 static void put_amf_string(AVIOContext *pb, const char *str)
180 size_t len = strlen(str);
182 avio_write(pb, str, len);
185 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
187 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
188 avio_wb24(pb, 5); /* Tag Data Size */
189 avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */
190 avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */
191 avio_wb24(pb, 0); /* StreamId = 0 */
192 avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
193 avio_w8(pb, 2); /* AVC end of sequence */
194 avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
195 avio_wb32(pb, 16); /* Size of FLV tag */
198 static void put_amf_double(AVIOContext *pb, double d)
200 avio_w8(pb, AMF_DATA_TYPE_NUMBER);
201 avio_wb64(pb, av_double2int(d));
204 static void put_amf_bool(AVIOContext *pb, int b)
206 avio_w8(pb, AMF_DATA_TYPE_BOOL);
210 static void write_metadata(AVFormatContext *s, unsigned int ts)
212 AVIOContext *pb = s->pb;
213 FLVContext *flv = s->priv_data;
214 int metadata_count = 0;
215 int64_t metadata_size_pos, data_size, metadata_count_pos;
216 AVDictionaryEntry *tag = NULL;
219 avio_w8(pb, 18); // tag type META
220 metadata_size_pos = avio_tell(pb);
221 avio_wb24(pb, 0); // size of data part (sum of all parts below)
222 avio_wb24(pb, ts); // timestamp
223 avio_wb32(pb, 0); // reserved
225 /* now data of data_size size */
227 /* first event name as a string */
228 avio_w8(pb, AMF_DATA_TYPE_STRING);
229 put_amf_string(pb, "onMetaData"); // 12 bytes
231 /* mixed array (hash) with size and string/type/data tuples */
232 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
233 metadata_count_pos = avio_tell(pb);
234 metadata_count = 4 * !!flv->video_par +
235 5 * !!flv->audio_par +
236 1 * !!flv->data_par +
237 2; // +2 for duration and file size
239 avio_wb32(pb, metadata_count);
241 put_amf_string(pb, "duration");
242 flv->duration_offset = avio_tell(pb);
244 // fill in the guessed duration, it'll be corrected later if incorrect
245 put_amf_double(pb, s->duration / AV_TIME_BASE);
247 if (flv->video_par) {
248 put_amf_string(pb, "width");
249 put_amf_double(pb, flv->video_par->width);
251 put_amf_string(pb, "height");
252 put_amf_double(pb, flv->video_par->height);
254 put_amf_string(pb, "videodatarate");
255 put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
257 if (flv->framerate != 0.0) {
258 put_amf_string(pb, "framerate");
259 put_amf_double(pb, flv->framerate);
263 put_amf_string(pb, "videocodecid");
264 put_amf_double(pb, flv->video_par->codec_tag);
267 if (flv->audio_par) {
268 put_amf_string(pb, "audiodatarate");
269 put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
271 put_amf_string(pb, "audiosamplerate");
272 put_amf_double(pb, flv->audio_par->sample_rate);
274 put_amf_string(pb, "audiosamplesize");
275 put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
277 put_amf_string(pb, "stereo");
278 put_amf_bool(pb, flv->audio_par->channels == 2);
280 put_amf_string(pb, "audiocodecid");
281 put_amf_double(pb, flv->audio_par->codec_tag);
285 put_amf_string(pb, "datastream");
286 put_amf_double(pb, 0.0);
289 ff_standardize_creation_time(s);
290 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
291 if( !strcmp(tag->key, "width")
292 ||!strcmp(tag->key, "height")
293 ||!strcmp(tag->key, "videodatarate")
294 ||!strcmp(tag->key, "framerate")
295 ||!strcmp(tag->key, "videocodecid")
296 ||!strcmp(tag->key, "audiodatarate")
297 ||!strcmp(tag->key, "audiosamplerate")
298 ||!strcmp(tag->key, "audiosamplesize")
299 ||!strcmp(tag->key, "stereo")
300 ||!strcmp(tag->key, "audiocodecid")
301 ||!strcmp(tag->key, "duration")
302 ||!strcmp(tag->key, "onMetaData")
303 ||!strcmp(tag->key, "datasize")
304 ||!strcmp(tag->key, "lasttimestamp")
305 ||!strcmp(tag->key, "totalframes")
306 ||!strcmp(tag->key, "hasAudio")
307 ||!strcmp(tag->key, "hasVideo")
308 ||!strcmp(tag->key, "hasCuePoints")
309 ||!strcmp(tag->key, "hasMetadata")
310 ||!strcmp(tag->key, "hasKeyframes")
312 av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
315 put_amf_string(pb, tag->key);
316 avio_w8(pb, AMF_DATA_TYPE_STRING);
317 put_amf_string(pb, tag->value);
321 put_amf_string(pb, "filesize");
322 flv->filesize_offset = avio_tell(pb);
323 put_amf_double(pb, 0); // delayed write
325 put_amf_string(pb, "");
326 avio_w8(pb, AMF_END_OF_OBJECT);
328 /* write total size of tag */
329 data_size = avio_tell(pb) - metadata_size_pos - 10;
331 avio_seek(pb, metadata_count_pos, SEEK_SET);
332 avio_wb32(pb, metadata_count);
334 avio_seek(pb, metadata_size_pos, SEEK_SET);
335 avio_wb24(pb, data_size);
336 avio_skip(pb, data_size + 10 - 3);
337 avio_wb32(pb, data_size + 11);
340 static int unsupported_codec(AVFormatContext *s,
341 const char* type, int codec_id)
343 const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
344 av_log(s, AV_LOG_ERROR,
345 "%s codec %s not compatible with flv\n",
347 desc ? desc->name : "unknown");
348 return AVERROR(ENOSYS);
351 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par) {
353 AVIOContext *pb = s->pb;
354 FLVContext *flv = s->priv_data;
356 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
357 || par->codec_id == AV_CODEC_ID_MPEG4) {
360 par->codec_type == AVMEDIA_TYPE_VIDEO ?
361 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
362 avio_wb24(pb, 0); // size patched later
363 avio_wb24(pb, 0); // ts
364 avio_w8(pb, 0); // ts ext
365 avio_wb24(pb, 0); // streamid
367 if (par->codec_id == AV_CODEC_ID_AAC) {
368 avio_w8(pb, get_audio_flags(s, par));
369 avio_w8(pb, 0); // AAC sequence header
371 if (!par->extradata_size && flv->flags & FLV_AAC_SEQ_HEADER_DETECT) {
373 int samplerate_index;
374 int channels = flv->audio_par->channels
375 - (flv->audio_par->channels == 8 ? 1 : 0);
378 for (samplerate_index = 0; samplerate_index < 16;
380 if (flv->audio_par->sample_rate
381 == mpeg4audio_sample_rates[samplerate_index])
384 init_put_bits(&pbc, data, sizeof(data));
385 put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
386 put_bits(&pbc, 4, samplerate_index); //sample rate index
387 put_bits(&pbc, 4, channels);
388 put_bits(&pbc, 1, 0); //frame length - 1024 samples
389 put_bits(&pbc, 1, 0); //does not depend on core coder
390 put_bits(&pbc, 1, 0); //is not extension
391 flush_put_bits(&pbc);
393 avio_w8(pb, data[0]);
394 avio_w8(pb, data[1]);
396 av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
399 avio_write(pb, par->extradata, par->extradata_size);
401 avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
402 avio_w8(pb, 0); // AVC sequence header
403 avio_wb24(pb, 0); // composition time
404 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
406 data_size = avio_tell(pb) - pos;
407 avio_seek(pb, -data_size - 10, SEEK_CUR);
408 avio_wb24(pb, data_size);
409 avio_skip(pb, data_size + 10 - 3);
410 avio_wb32(pb, data_size + 11); // previous tag size
414 static int flv_write_header(AVFormatContext *s)
417 AVIOContext *pb = s->pb;
418 FLVContext *flv = s->priv_data;
420 for (i = 0; i < s->nb_streams; i++) {
421 AVCodecParameters *par = s->streams[i]->codecpar;
422 FLVStreamContext *sc;
423 switch (par->codec_type) {
424 case AVMEDIA_TYPE_VIDEO:
425 if (s->streams[i]->avg_frame_rate.den &&
426 s->streams[i]->avg_frame_rate.num) {
427 flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
429 if (flv->video_par) {
430 av_log(s, AV_LOG_ERROR,
431 "at most one video stream is supported in flv\n");
432 return AVERROR(EINVAL);
434 flv->video_par = par;
435 if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
436 return unsupported_codec(s, "Video", par->codec_id);
438 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
439 par->codec_id == AV_CODEC_ID_H263) {
440 int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
441 av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
442 "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
445 av_log(s, AV_LOG_ERROR,
446 "use vstrict=-1 / -strict -1 to use it anyway.\n");
447 return AVERROR(EINVAL);
449 } else if (par->codec_id == AV_CODEC_ID_VP6) {
450 av_log(s, AV_LOG_WARNING,
451 "Muxing VP6 in flv will produce flipped video on playback.\n");
454 case AVMEDIA_TYPE_AUDIO:
455 if (flv->audio_par) {
456 av_log(s, AV_LOG_ERROR,
457 "at most one audio stream is supported in flv\n");
458 return AVERROR(EINVAL);
460 flv->audio_par = par;
461 if (get_audio_flags(s, par) < 0)
462 return unsupported_codec(s, "Audio", par->codec_id);
463 if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
464 av_log(s, AV_LOG_WARNING,
465 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
467 case AVMEDIA_TYPE_DATA:
468 if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
469 return unsupported_codec(s, "Data", par->codec_id);
472 case AVMEDIA_TYPE_SUBTITLE:
473 if (par->codec_id != AV_CODEC_ID_TEXT) {
474 av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
475 avcodec_get_name(par->codec_id), i);
476 return AVERROR_INVALIDDATA;
481 av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
482 av_get_media_type_string(par->codec_type), i);
483 return AVERROR(EINVAL);
485 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
487 sc = av_mallocz(sizeof(FLVStreamContext));
489 return AVERROR(ENOMEM);
490 s->streams[i]->priv_data = sc;
494 flv->delay = AV_NOPTS_VALUE;
496 avio_write(pb, "FLV", 3);
498 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
499 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
503 for (i = 0; i < s->nb_streams; i++)
504 if (s->streams[i]->codecpar->codec_tag == 5) {
505 avio_w8(pb, 8); // message type
506 avio_wb24(pb, 0); // include flags
507 avio_wb24(pb, 0); // time stamp
508 avio_wb32(pb, 0); // reserved
509 avio_wb32(pb, 11); // size
513 write_metadata(s, 0);
515 for (i = 0; i < s->nb_streams; i++) {
516 flv_write_codec_header(s, s->streams[i]->codecpar);
522 static int flv_write_trailer(AVFormatContext *s)
526 AVIOContext *pb = s->pb;
527 FLVContext *flv = s->priv_data;
531 for (i = 0; i < s->nb_streams; i++) {
532 AVCodecParameters *par = s->streams[i]->codecpar;
533 FLVStreamContext *sc = s->streams[i]->priv_data;
534 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
535 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
536 put_avc_eos_tag(pb, sc->last_ts);
539 file_size = avio_tell(pb);
541 /* update information */
542 if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0)
543 av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
545 put_amf_double(pb, flv->duration / (double)1000);
546 if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0)
547 av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
549 put_amf_double(pb, file_size);
551 avio_seek(pb, file_size, SEEK_SET);
555 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
557 AVIOContext *pb = s->pb;
558 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
559 FLVContext *flv = s->priv_data;
560 FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
562 int size = pkt->size;
563 uint8_t *data = NULL;
564 int flags = -1, flags_size, ret;
566 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
567 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
569 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
574 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
575 || par->codec_id == AV_CODEC_ID_MPEG4) {
577 uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
578 if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
579 av_free(par->extradata);
580 par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
581 memcpy(par->extradata, side, side_size);
582 par->extradata_size = side_size;
583 flv_write_codec_header(s, par);
587 if (flv->delay == AV_NOPTS_VALUE)
588 flv->delay = -pkt->dts;
590 if (pkt->dts < -flv->delay) {
591 av_log(s, AV_LOG_WARNING,
592 "Packets are not in the proper order with respect to DTS\n");
593 return AVERROR(EINVAL);
598 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
599 write_metadata(s, ts);
600 s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
603 avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000),
604 pkt->flags & AV_PKT_FLAG_KEY && (flv->video_par ? par->codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
606 switch (par->codec_type) {
607 case AVMEDIA_TYPE_VIDEO:
608 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
610 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
612 flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
614 case AVMEDIA_TYPE_AUDIO:
615 flags = get_audio_flags(s, par);
619 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
621 case AVMEDIA_TYPE_SUBTITLE:
622 case AVMEDIA_TYPE_DATA:
623 avio_w8(pb, FLV_TAG_TYPE_META);
626 return AVERROR(EINVAL);
629 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
630 /* check if extradata looks like mp4 formatted */
631 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
632 if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
634 } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
635 (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
636 if (!s->streams[pkt->stream_index]->nb_frames) {
637 av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
638 "use the audio bitstream filter 'aac_adtstoasc' to fix it "
639 "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
640 return AVERROR_INVALIDDATA;
642 av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
645 /* check Speex packet duration */
646 if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
647 av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
648 "8 frames per packet. Adobe Flash "
649 "Player cannot handle this!\n");
651 if (sc->last_ts < ts)
654 if (size + flags_size >= 1<<24) {
655 av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
656 size + flags_size, 1<<24);
657 return AVERROR(EINVAL);
660 avio_wb24(pb, size + flags_size);
661 avio_wb24(pb, ts & 0xFFFFFF);
662 avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
663 avio_wb24(pb, flv->reserved);
665 if (par->codec_type == AVMEDIA_TYPE_DATA ||
666 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
668 int64_t metadata_size_pos = avio_tell(pb);
669 if (par->codec_id == AV_CODEC_ID_TEXT) {
670 // legacy FFmpeg magic?
671 avio_w8(pb, AMF_DATA_TYPE_STRING);
672 put_amf_string(pb, "onTextData");
673 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
675 put_amf_string(pb, "type");
676 avio_w8(pb, AMF_DATA_TYPE_STRING);
677 put_amf_string(pb, "Text");
678 put_amf_string(pb, "text");
679 avio_w8(pb, AMF_DATA_TYPE_STRING);
680 put_amf_string(pb, pkt->data);
681 put_amf_string(pb, "");
682 avio_w8(pb, AMF_END_OF_OBJECT);
684 // just pass the metadata through
685 avio_write(pb, data ? data : pkt->data, size);
687 /* write total size of tag */
688 data_size = avio_tell(pb) - metadata_size_pos;
689 avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
690 avio_wb24(pb, data_size);
691 avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
692 avio_wb32(pb, data_size + 11);
694 av_assert1(flags>=0);
696 if (par->codec_id == AV_CODEC_ID_VP6)
698 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
699 if (par->extradata_size)
700 avio_w8(pb, par->extradata[0]);
702 avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
703 (FFALIGN(par->height, 16) - par->height));
704 } else if (par->codec_id == AV_CODEC_ID_AAC)
705 avio_w8(pb, 1); // AAC raw
706 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
707 avio_w8(pb, 1); // AVC NALU
708 avio_wb24(pb, pkt->pts - pkt->dts);
711 avio_write(pb, data ? data : pkt->data, size);
713 avio_wb32(pb, size + flags_size + 11); // previous tag size
714 flv->duration = FFMAX(flv->duration,
715 pkt->pts + flv->delay + pkt->duration);
723 static const AVOption options[] = {
724 { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
725 { "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" },
729 static const AVClass flv_muxer_class = {
730 .class_name = "flv muxer",
731 .item_name = av_default_item_name,
733 .version = LIBAVUTIL_VERSION_INT,
736 AVOutputFormat ff_flv_muxer = {
738 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
739 .mime_type = "video/x-flv",
741 .priv_data_size = sizeof(FLVContext),
742 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
743 .video_codec = AV_CODEC_ID_FLV1,
744 .write_header = flv_write_header,
745 .write_packet = flv_write_packet,
746 .write_trailer = flv_write_trailer,
747 .codec_tag = (const AVCodecTag* const []) {
748 flv_video_codec_ids, flv_audio_codec_ids, 0
750 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
752 .priv_class = &flv_muxer_class,