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 int flv_write_header(AVFormatContext *s)
349 AVIOContext *pb = s->pb;
350 FLVContext *flv = s->priv_data;
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);
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);
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);
371 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
372 par->codec_id == AV_CODEC_ID_H263) {
373 int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
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));
378 av_log(s, AV_LOG_ERROR,
379 "use vstrict=-1 / -strict -1 to use it anyway.\n");
380 return AVERROR(EINVAL);
382 } else if (par->codec_id == AV_CODEC_ID_VP6) {
383 av_log(s, AV_LOG_WARNING,
384 "Muxing VP6 in flv will produce flipped video on playback.\n");
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);
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)
397 av_log(s, AV_LOG_WARNING,
398 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
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);
405 case AVMEDIA_TYPE_SUBTITLE:
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;
414 av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
415 av_get_media_type_string(par->codec_type), i);
416 return AVERROR(EINVAL);
418 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
420 sc = av_mallocz(sizeof(FLVStreamContext));
422 return AVERROR(ENOMEM);
423 s->streams[i]->priv_data = sc;
427 flv->delay = AV_NOPTS_VALUE;
429 avio_write(pb, "FLV", 3);
431 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
432 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
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
446 write_metadata(s, 0);
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) {
452 avio_w8(pb, par->codec_type == AVMEDIA_TYPE_VIDEO ?
453 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
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
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
463 if (!par->extradata_size && flv->flags & 1) {
465 int samplerate_index;
466 int channels = flv->audio_par->channels - (flv->audio_par->channels == 8 ? 1 : 0);
469 for (samplerate_index = 0; samplerate_index < 16; samplerate_index++)
470 if (flv->audio_par->sample_rate == mpeg4audio_sample_rates[samplerate_index])
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);
482 avio_w8(pb, data[0]);
483 avio_w8(pb, data[1]);
485 av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n", data[0], data[1]);
487 avio_write(pb, par->extradata, par->extradata_size);
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
492 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
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
505 static int flv_write_trailer(AVFormatContext *s)
509 AVIOContext *pb = s->pb;
510 FLVContext *flv = s->priv_data;
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 &&
518 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
519 put_avc_eos_tag(pb, sc->last_ts);
522 file_size = avio_tell(pb);
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");
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");
532 put_amf_double(pb, file_size);
534 avio_seek(pb, file_size, SEEK_SET);
538 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
540 AVIOContext *pb = s->pb;
541 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
542 FLVContext *flv = s->priv_data;
543 FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
545 int size = pkt->size;
546 uint8_t *data = NULL;
547 int flags = -1, flags_size, ret;
549 if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
550 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
552 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
557 if (flv->delay == AV_NOPTS_VALUE)
558 flv->delay = -pkt->dts;
560 if (pkt->dts < -flv->delay) {
561 av_log(s, AV_LOG_WARNING,
562 "Packets are not in the proper order with respect to DTS\n");
563 return AVERROR(EINVAL);
568 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
569 write_metadata(s, ts);
570 s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
573 switch (par->codec_type) {
574 case AVMEDIA_TYPE_VIDEO:
575 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
577 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
579 flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
581 case AVMEDIA_TYPE_AUDIO:
582 flags = get_audio_flags(s, par);
586 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
588 case AVMEDIA_TYPE_SUBTITLE:
589 case AVMEDIA_TYPE_DATA:
590 avio_w8(pb, FLV_TAG_TYPE_META);
593 return AVERROR(EINVAL);
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)
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;
609 av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
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");
618 if (sc->last_ts < ts)
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);
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);
632 if (par->codec_type == AVMEDIA_TYPE_DATA ||
633 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
635 int64_t metadata_size_pos = avio_tell(pb);
636 if (par->codec_id == AV_CODEC_ID_TEXT) {
637 // legacy FFmpeg magic?
638 avio_w8(pb, AMF_DATA_TYPE_STRING);
639 put_amf_string(pb, "onTextData");
640 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
642 put_amf_string(pb, "type");
643 avio_w8(pb, AMF_DATA_TYPE_STRING);
644 put_amf_string(pb, "Text");
645 put_amf_string(pb, "text");
646 avio_w8(pb, AMF_DATA_TYPE_STRING);
647 put_amf_string(pb, pkt->data);
648 put_amf_string(pb, "");
649 avio_w8(pb, AMF_END_OF_OBJECT);
651 // just pass the metadata through
652 avio_write(pb, data ? data : pkt->data, size);
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);
661 av_assert1(flags>=0);
663 if (par->codec_id == AV_CODEC_ID_VP6)
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]);
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);
678 avio_write(pb, data ? data : pkt->data, size);
680 avio_wb32(pb, size + flags_size + 11); // previous tag size
681 flv->duration = FFMAX(flv->duration,
682 pkt->pts + flv->delay + pkt->duration);
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" },
696 static const AVClass flv_muxer_class = {
697 .class_name = "flv muxer",
698 .item_name = av_default_item_name,
700 .version = LIBAVUTIL_VERSION_INT,
703 AVOutputFormat ff_flv_muxer = {
705 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
706 .mime_type = "video/x-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,
711 .write_header = flv_write_header,
712 .write_packet = flv_write_packet,
713 .write_trailer = flv_write_trailer,
714 .codec_tag = (const AVCodecTag* const []) {
715 flv_video_codec_ids, flv_audio_codec_ids, 0
717 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
719 .priv_class = &flv_muxer_class,