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"
31 #include "libavutil/opt.h"
32 #include "libavcodec/put_bits.h"
33 #include "libavcodec/aacenctab.h"
36 static const AVCodecTag flv_video_codec_ids[] = {
37 { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
38 { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
39 { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
40 { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
41 { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
42 { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
43 { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
44 { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
45 { AV_CODEC_ID_H264, FLV_CODECID_H264 },
46 { AV_CODEC_ID_NONE, 0 }
49 static const AVCodecTag flv_audio_codec_ids[] = {
50 { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
51 { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
52 { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
53 { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
54 { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
55 { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
56 { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
57 { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
58 { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
59 { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
60 { AV_CODEC_ID_NONE, 0 }
63 typedef struct FLVContext {
66 int64_t duration_offset;
67 int64_t filesize_offset;
69 int64_t delay; ///< first dts delay (needed for AVC & Speex)
71 AVCodecParameters *audio_par;
72 AVCodecParameters *video_par;
74 AVCodecParameters *data_par;
79 typedef struct FLVStreamContext {
80 int64_t last_ts; ///< last timestamp for each stream
83 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
85 int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
86 : FLV_SAMPLESSIZE_8BIT;
88 if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
89 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
90 FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
91 else if (par->codec_id == AV_CODEC_ID_SPEEX) {
92 if (par->sample_rate != 16000) {
93 av_log(s, AV_LOG_ERROR,
94 "FLV only supports wideband (16kHz) Speex audio\n");
95 return AVERROR(EINVAL);
97 if (par->channels != 1) {
98 av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
99 return AVERROR(EINVAL);
101 return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
103 switch (par->sample_rate) {
105 flags |= FLV_SAMPLERATE_44100HZ;
108 flags |= FLV_SAMPLERATE_22050HZ;
111 flags |= FLV_SAMPLERATE_11025HZ;
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;
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);
128 if (par->channels > 1)
131 switch (par->codec_id) {
132 case AV_CODEC_ID_MP3:
133 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
135 case AV_CODEC_ID_PCM_U8:
136 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
138 case AV_CODEC_ID_PCM_S16BE:
139 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
141 case AV_CODEC_ID_PCM_S16LE:
142 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
144 case AV_CODEC_ID_ADPCM_SWF:
145 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
147 case AV_CODEC_ID_NELLYMOSER:
148 if (par->sample_rate == 8000)
149 flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
150 else if (par->sample_rate == 16000)
151 flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
153 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
155 case AV_CODEC_ID_PCM_MULAW:
156 flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
158 case AV_CODEC_ID_PCM_ALAW:
159 flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
162 flags |= par->codec_tag << 4;
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);
173 static void put_amf_string(AVIOContext *pb, const char *str)
175 size_t len = strlen(str);
177 avio_write(pb, str, len);
180 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
182 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
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 */
193 static void put_amf_double(AVIOContext *pb, double d)
195 avio_w8(pb, AMF_DATA_TYPE_NUMBER);
196 avio_wb64(pb, av_double2int(d));
199 static void put_amf_bool(AVIOContext *pb, int b)
201 avio_w8(pb, AMF_DATA_TYPE_BOOL);
205 static void write_metadata(AVFormatContext *s, unsigned int ts)
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;
211 AVDictionaryEntry *tag = NULL;
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
220 /* now data of data_size size */
222 /* first event name as a string */
223 avio_w8(pb, AMF_DATA_TYPE_STRING);
224 put_amf_string(pb, "onMetaData"); // 12 bytes
226 /* mixed array (hash) with size and string/type/data tuples */
227 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
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
234 avio_wb32(pb, metadata_count);
236 put_amf_string(pb, "duration");
237 flv->duration_offset = avio_tell(pb);
239 // fill in the guessed duration, it'll be corrected later if incorrect
240 put_amf_double(pb, s->duration / AV_TIME_BASE);
242 if (flv->video_par) {
243 put_amf_string(pb, "width");
244 put_amf_double(pb, flv->video_par->width);
246 put_amf_string(pb, "height");
247 put_amf_double(pb, flv->video_par->height);
249 put_amf_string(pb, "videodatarate");
250 put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
252 if (flv->framerate != 0.0) {
253 put_amf_string(pb, "framerate");
254 put_amf_double(pb, flv->framerate);
258 put_amf_string(pb, "videocodecid");
259 put_amf_double(pb, flv->video_par->codec_tag);
262 if (flv->audio_par) {
263 put_amf_string(pb, "audiodatarate");
264 put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
266 put_amf_string(pb, "audiosamplerate");
267 put_amf_double(pb, flv->audio_par->sample_rate);
269 put_amf_string(pb, "audiosamplesize");
270 put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
272 put_amf_string(pb, "stereo");
273 put_amf_bool(pb, flv->audio_par->channels == 2);
275 put_amf_string(pb, "audiocodecid");
276 put_amf_double(pb, flv->audio_par->codec_tag);
280 put_amf_string(pb, "datastream");
281 put_amf_double(pb, 0.0);
284 ff_standardize_creation_time(s);
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")
307 av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
310 put_amf_string(pb, tag->key);
311 avio_w8(pb, AMF_DATA_TYPE_STRING);
312 put_amf_string(pb, tag->value);
316 put_amf_string(pb, "filesize");
317 flv->filesize_offset = avio_tell(pb);
318 put_amf_double(pb, 0); // delayed write
320 put_amf_string(pb, "");
321 avio_w8(pb, AMF_END_OF_OBJECT);
323 /* write total size of tag */
324 data_size = avio_tell(pb) - metadata_size_pos - 10;
326 avio_seek(pb, metadata_count_pos, SEEK_SET);
327 avio_wb32(pb, metadata_count);
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);
335 static int unsupported_codec(AVFormatContext *s,
336 const char* type, int codec_id)
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",
342 desc ? desc->name : "unknown");
343 return AVERROR(ENOSYS);
346 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par) {
348 AVIOContext *pb = s->pb;
349 FLVContext *flv = s->priv_data;
351 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
352 || par->codec_id == AV_CODEC_ID_MPEG4) {
355 par->codec_type == AVMEDIA_TYPE_VIDEO ?
356 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
357 avio_wb24(pb, 0); // size patched later
358 avio_wb24(pb, 0); // ts
359 avio_w8(pb, 0); // ts ext
360 avio_wb24(pb, 0); // streamid
362 if (par->codec_id == AV_CODEC_ID_AAC) {
363 avio_w8(pb, get_audio_flags(s, par));
364 avio_w8(pb, 0); // AAC sequence header
366 if (!par->extradata_size && flv->flags & 1) {
368 int samplerate_index;
369 int channels = flv->audio_par->channels
370 - (flv->audio_par->channels == 8 ? 1 : 0);
373 for (samplerate_index = 0; samplerate_index < 16;
375 if (flv->audio_par->sample_rate
376 == mpeg4audio_sample_rates[samplerate_index])
379 init_put_bits(&pbc, data, sizeof(data));
380 put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
381 put_bits(&pbc, 4, samplerate_index); //sample rate index
382 put_bits(&pbc, 4, channels);
383 put_bits(&pbc, 1, 0); //frame length - 1024 samples
384 put_bits(&pbc, 1, 0); //does not depend on core coder
385 put_bits(&pbc, 1, 0); //is not extension
386 flush_put_bits(&pbc);
388 avio_w8(pb, data[0]);
389 avio_w8(pb, data[1]);
391 av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
394 avio_write(pb, par->extradata, par->extradata_size);
396 avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
397 avio_w8(pb, 0); // AVC sequence header
398 avio_wb24(pb, 0); // composition time
399 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
401 data_size = avio_tell(pb) - pos;
402 avio_seek(pb, -data_size - 10, SEEK_CUR);
403 avio_wb24(pb, data_size);
404 avio_skip(pb, data_size + 10 - 3);
405 avio_wb32(pb, data_size + 11); // previous tag size
409 static int flv_write_header(AVFormatContext *s)
412 AVIOContext *pb = s->pb;
413 FLVContext *flv = s->priv_data;
415 for (i = 0; i < s->nb_streams; i++) {
416 AVCodecParameters *par = s->streams[i]->codecpar;
417 FLVStreamContext *sc;
418 switch (par->codec_type) {
419 case AVMEDIA_TYPE_VIDEO:
420 if (s->streams[i]->avg_frame_rate.den &&
421 s->streams[i]->avg_frame_rate.num) {
422 flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
424 if (flv->video_par) {
425 av_log(s, AV_LOG_ERROR,
426 "at most one video stream is supported in flv\n");
427 return AVERROR(EINVAL);
429 flv->video_par = par;
430 if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
431 return unsupported_codec(s, "Video", par->codec_id);
433 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
434 par->codec_id == AV_CODEC_ID_H263) {
435 int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
436 av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
437 "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
440 av_log(s, AV_LOG_ERROR,
441 "use vstrict=-1 / -strict -1 to use it anyway.\n");
442 return AVERROR(EINVAL);
444 } else if (par->codec_id == AV_CODEC_ID_VP6) {
445 av_log(s, AV_LOG_WARNING,
446 "Muxing VP6 in flv will produce flipped video on playback.\n");
449 case AVMEDIA_TYPE_AUDIO:
450 if (flv->audio_par) {
451 av_log(s, AV_LOG_ERROR,
452 "at most one audio stream is supported in flv\n");
453 return AVERROR(EINVAL);
455 flv->audio_par = par;
456 if (get_audio_flags(s, par) < 0)
457 return unsupported_codec(s, "Audio", par->codec_id);
458 if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
459 av_log(s, AV_LOG_WARNING,
460 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
462 case AVMEDIA_TYPE_DATA:
463 if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
464 return unsupported_codec(s, "Data", par->codec_id);
467 case AVMEDIA_TYPE_SUBTITLE:
468 if (par->codec_id != AV_CODEC_ID_TEXT) {
469 av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
470 avcodec_get_name(par->codec_id), i);
471 return AVERROR_INVALIDDATA;
476 av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
477 av_get_media_type_string(par->codec_type), i);
478 return AVERROR(EINVAL);
480 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
482 sc = av_mallocz(sizeof(FLVStreamContext));
484 return AVERROR(ENOMEM);
485 s->streams[i]->priv_data = sc;
489 flv->delay = AV_NOPTS_VALUE;
491 avio_write(pb, "FLV", 3);
493 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
494 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
498 for (i = 0; i < s->nb_streams; i++)
499 if (s->streams[i]->codecpar->codec_tag == 5) {
500 avio_w8(pb, 8); // message type
501 avio_wb24(pb, 0); // include flags
502 avio_wb24(pb, 0); // time stamp
503 avio_wb32(pb, 0); // reserved
504 avio_wb32(pb, 11); // size
508 write_metadata(s, 0);
510 for (i = 0; i < s->nb_streams; i++) {
511 flv_write_codec_header(s, s->streams[i]->codecpar);
517 static int flv_write_trailer(AVFormatContext *s)
521 AVIOContext *pb = s->pb;
522 FLVContext *flv = s->priv_data;
526 for (i = 0; i < s->nb_streams; i++) {
527 AVCodecParameters *par = s->streams[i]->codecpar;
528 FLVStreamContext *sc = s->streams[i]->priv_data;
529 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
530 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
531 put_avc_eos_tag(pb, sc->last_ts);
534 file_size = avio_tell(pb);
536 /* update information */
537 if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0)
538 av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
540 put_amf_double(pb, flv->duration / (double)1000);
541 if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0)
542 av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
544 put_amf_double(pb, file_size);
546 avio_seek(pb, file_size, SEEK_SET);
550 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
552 AVIOContext *pb = s->pb;
553 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
554 FLVContext *flv = s->priv_data;
555 FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
557 int size = pkt->size;
558 uint8_t *data = NULL;
559 int flags = -1, flags_size, ret;
561 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
562 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
564 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
569 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
570 || par->codec_id == AV_CODEC_ID_MPEG4) {
572 uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
573 if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
574 av_free(par->extradata);
575 par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
576 memcpy(par->extradata, side, side_size);
577 par->extradata_size = side_size;
578 flv_write_codec_header(s, par);
582 if (flv->delay == AV_NOPTS_VALUE)
583 flv->delay = -pkt->dts;
585 if (pkt->dts < -flv->delay) {
586 av_log(s, AV_LOG_WARNING,
587 "Packets are not in the proper order with respect to DTS\n");
588 return AVERROR(EINVAL);
593 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
594 write_metadata(s, ts);
595 s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
598 switch (par->codec_type) {
599 case AVMEDIA_TYPE_VIDEO:
600 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
602 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
604 flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
606 case AVMEDIA_TYPE_AUDIO:
607 flags = get_audio_flags(s, par);
611 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
613 case AVMEDIA_TYPE_SUBTITLE:
614 case AVMEDIA_TYPE_DATA:
615 avio_w8(pb, FLV_TAG_TYPE_META);
618 return AVERROR(EINVAL);
621 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
622 /* check if extradata looks like mp4 formatted */
623 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
624 if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
626 } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
627 (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
628 if (!s->streams[pkt->stream_index]->nb_frames) {
629 av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
630 "use the audio bitstream filter 'aac_adtstoasc' to fix it "
631 "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
632 return AVERROR_INVALIDDATA;
634 av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
637 /* check Speex packet duration */
638 if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
639 av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
640 "8 frames per packet. Adobe Flash "
641 "Player cannot handle this!\n");
643 if (sc->last_ts < ts)
646 if (size + flags_size >= 1<<24) {
647 av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
648 size + flags_size, 1<<24);
649 return AVERROR(EINVAL);
652 avio_wb24(pb, size + flags_size);
653 avio_wb24(pb, ts & 0xFFFFFF);
654 avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
655 avio_wb24(pb, flv->reserved);
657 if (par->codec_type == AVMEDIA_TYPE_DATA ||
658 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
660 int64_t metadata_size_pos = avio_tell(pb);
661 if (par->codec_id == AV_CODEC_ID_TEXT) {
662 // legacy FFmpeg magic?
663 avio_w8(pb, AMF_DATA_TYPE_STRING);
664 put_amf_string(pb, "onTextData");
665 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
667 put_amf_string(pb, "type");
668 avio_w8(pb, AMF_DATA_TYPE_STRING);
669 put_amf_string(pb, "Text");
670 put_amf_string(pb, "text");
671 avio_w8(pb, AMF_DATA_TYPE_STRING);
672 put_amf_string(pb, pkt->data);
673 put_amf_string(pb, "");
674 avio_w8(pb, AMF_END_OF_OBJECT);
676 // just pass the metadata through
677 avio_write(pb, data ? data : pkt->data, size);
679 /* write total size of tag */
680 data_size = avio_tell(pb) - metadata_size_pos;
681 avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
682 avio_wb24(pb, data_size);
683 avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
684 avio_wb32(pb, data_size + 11);
686 av_assert1(flags>=0);
688 if (par->codec_id == AV_CODEC_ID_VP6)
690 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
691 if (par->extradata_size)
692 avio_w8(pb, par->extradata[0]);
694 avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
695 (FFALIGN(par->height, 16) - par->height));
696 } else if (par->codec_id == AV_CODEC_ID_AAC)
697 avio_w8(pb, 1); // AAC raw
698 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
699 avio_w8(pb, 1); // AVC NALU
700 avio_wb24(pb, pkt->pts - pkt->dts);
703 avio_write(pb, data ? data : pkt->data, size);
705 avio_wb32(pb, size + flags_size + 11); // previous tag size
706 flv->duration = FFMAX(flv->duration,
707 pkt->pts + flv->delay + pkt->duration);
715 static const AVOption options[] = {
716 { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
717 { "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" },
721 static const AVClass flv_muxer_class = {
722 .class_name = "flv muxer",
723 .item_name = av_default_item_name,
725 .version = LIBAVUTIL_VERSION_INT,
728 AVOutputFormat ff_flv_muxer = {
730 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
731 .mime_type = "video/x-flv",
733 .priv_data_size = sizeof(FLVContext),
734 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
735 .video_codec = AV_CODEC_ID_FLV1,
736 .write_header = flv_write_header,
737 .write_packet = flv_write_packet,
738 .write_trailer = flv_write_trailer,
739 .codec_tag = (const AVCodecTag* const []) {
740 flv_video_codec_ids, flv_audio_codec_ids, 0
742 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
744 .priv_class = &flv_muxer_class,