FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/flvenc.c
Date: 2025-01-20 09:27:23
Exec Total Coverage
Lines: 735 952 77.2%
Functions: 24 25 96.0%
Branches: 422 636 66.4%
Line Branch Exec Source
1 /*
2 * FLV muxer
3 * Copyright (c) 2003 The FFmpeg Project
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/intfloat.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/mastering_display_metadata.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/mem.h"
29 #include "libavcodec/codec_desc.h"
30 #include "libavcodec/mpeg4audio.h"
31 #include "avio.h"
32 #include "avc.h"
33 #include "av1.h"
34 #include "vpcc.h"
35 #include "hevc.h"
36 #include "avformat.h"
37 #include "flv.h"
38 #include "internal.h"
39 #include "nal.h"
40 #include "mux.h"
41 #include "libavutil/opt.h"
42 #include "libavcodec/put_bits.h"
43
44
45 static const AVCodecTag flv_video_codec_ids[] = {
46 { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
47 { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
48 { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
49 { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
50 { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
51 { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
52 { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
53 { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
54 { AV_CODEC_ID_H264, FLV_CODECID_H264 },
55 { AV_CODEC_ID_HEVC, MKBETAG('h', 'v', 'c', '1') },
56 { AV_CODEC_ID_AV1, MKBETAG('a', 'v', '0', '1') },
57 { AV_CODEC_ID_VP9, MKBETAG('v', 'p', '0', '9') },
58 { AV_CODEC_ID_NONE, 0 }
59 };
60
61 static const AVCodecTag flv_audio_codec_ids[] = {
62 { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
63 { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
64 { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
65 { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
66 { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
67 { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
68 { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
69 { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
70 { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
71 { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
72 { AV_CODEC_ID_OPUS, MKBETAG('O', 'p', 'u', 's') },
73 { AV_CODEC_ID_FLAC, MKBETAG('f', 'L', 'a', 'C') },
74 { AV_CODEC_ID_AC3, MKBETAG('a', 'c', '-', '3') },
75 { AV_CODEC_ID_EAC3, MKBETAG('e', 'c', '-', '3') },
76 { AV_CODEC_ID_NONE, 0 }
77 };
78
79 typedef enum {
80 FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
81 FLV_NO_SEQUENCE_END = (1 << 1),
82 FLV_ADD_KEYFRAME_INDEX = (1 << 2),
83 FLV_NO_METADATA = (1 << 3),
84 FLV_NO_DURATION_FILESIZE = (1 << 4),
85 } FLVFlags;
86
87 typedef struct FLVFileposition {
88 int64_t keyframe_position;
89 double keyframe_timestamp;
90 struct FLVFileposition *next;
91 } FLVFileposition;
92
93 typedef struct FLVContext {
94 AVClass *av_class;
95 int reserved;
96 int64_t duration_offset;
97 int64_t filesize_offset;
98 int64_t duration;
99 int64_t delay; ///< first dts delay (needed for AVC & Speex)
100
101 int64_t datastart_offset;
102 int64_t datasize_offset;
103 int64_t datasize;
104 int64_t videosize_offset;
105 int64_t videosize;
106 int64_t audiosize_offset;
107 int64_t audiosize;
108
109 int64_t metadata_size_pos;
110 int64_t metadata_totalsize_pos;
111 int64_t metadata_totalsize;
112 int64_t keyframe_index_size;
113
114 int64_t lasttimestamp_offset;
115 double lasttimestamp;
116 int64_t lastkeyframetimestamp_offset;
117 double lastkeyframetimestamp;
118 int64_t lastkeyframelocation_offset;
119 int64_t lastkeyframelocation;
120
121 int64_t keyframes_info_offset;
122
123 int64_t filepositions_count;
124 FLVFileposition *filepositions;
125 FLVFileposition *head_filepositions;
126
127 AVCodecParameters *audio_par;
128 AVCodecParameters *video_par;
129 double framerate;
130 AVCodecParameters *data_par;
131
132 int flags;
133 int64_t *last_ts;
134 int *metadata_pkt_written;
135 int *track_idx_map;
136 } FLVContext;
137
138 944 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
139 {
140 1888 int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
141
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 944 : FLV_SAMPLESSIZE_8BIT;
142
143
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 944 if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
144 293 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
145 FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
146
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 651 if (par->codec_id == AV_CODEC_ID_OPUS || par->codec_id == AV_CODEC_ID_FLAC
147
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 557 || par->codec_id == AV_CODEC_ID_AC3 || par->codec_id == AV_CODEC_ID_EAC3)
148 142 return FLV_CODECID_EX_HEADER; // only needed for codec support check
149
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 509 else if (par->codec_id == AV_CODEC_ID_SPEEX) {
150 ✗ if (par->sample_rate != 16000) {
151 ✗ av_log(s, AV_LOG_ERROR,
152 "FLV only supports wideband (16kHz) Speex audio\n");
153 ✗ return AVERROR(EINVAL);
154 }
155 ✗ if (par->ch_layout.nb_channels != 1) {
156 ✗ av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
157 ✗ return AVERROR(EINVAL);
158 }
159 ✗ return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
160 } else {
161
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 509 switch (par->sample_rate) {
162 ✗ case 48000:
163 // 48khz mp3 is stored with 44k1 samplerate identifer
164 ✗ if (par->codec_id == AV_CODEC_ID_MP3) {
165 ✗ flags |= FLV_SAMPLERATE_44100HZ;
166 ✗ break;
167 } else {
168 ✗ goto error;
169 }
170 132 case 44100:
171 132 flags |= FLV_SAMPLERATE_44100HZ;
172 132 break;
173 ✗ case 22050:
174 ✗ flags |= FLV_SAMPLERATE_22050HZ;
175 ✗ break;
176 ✗ case 11025:
177 ✗ flags |= FLV_SAMPLERATE_11025HZ;
178 ✗ break;
179 377 case 16000: // nellymoser only
180 case 8000: // nellymoser only
181 case 5512: // not MP3
182
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 377 if (par->codec_id != AV_CODEC_ID_MP3) {
183 377 flags |= FLV_SAMPLERATE_SPECIAL;
184 377 break;
185 }
186 default:
187 ✗ error:
188 ✗ av_log(s, AV_LOG_ERROR,
189 "FLV does not support sample rate %d, "
190 "choose from (44100, 22050, 11025)\n", par->sample_rate);
191 ✗ return AVERROR(EINVAL);
192 }
193 }
194
195
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 509 if (par->ch_layout.nb_channels > 1)
196 132 flags |= FLV_STEREO;
197
198
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 509 switch (par->codec_id) {
199 ✗ case AV_CODEC_ID_MP3:
200 ✗ flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
201 ✗ break;
202 ✗ case AV_CODEC_ID_PCM_U8:
203 ✗ flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
204 ✗ break;
205 ✗ case AV_CODEC_ID_PCM_S16BE:
206 ✗ flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
207 ✗ break;
208 ✗ case AV_CODEC_ID_PCM_S16LE:
209 ✗ flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
210 ✗ break;
211 132 case AV_CODEC_ID_ADPCM_SWF:
212 132 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
213 132 break;
214 377 case AV_CODEC_ID_NELLYMOSER:
215
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 377 if (par->sample_rate == 8000)
216 ✗ flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
217
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 377 else if (par->sample_rate == 16000)
218 377 flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
219 else
220 ✗ flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
221 377 break;
222 ✗ case AV_CODEC_ID_PCM_MULAW:
223 ✗ flags |= FLV_CODECID_PCM_MULAW | FLV_SAMPLESSIZE_16BIT;
224 ✗ break;
225 ✗ case AV_CODEC_ID_PCM_ALAW:
226 ✗ flags |= FLV_CODECID_PCM_ALAW | FLV_SAMPLESSIZE_16BIT;
227 ✗ break;
228 ✗ case 0:
229 ✗ flags |= par->codec_tag << 4;
230 ✗ break;
231 ✗ default:
232 ✗ av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
233 avcodec_get_name(par->codec_id));
234 ✗ return AVERROR(EINVAL);
235 }
236
237 509 return flags;
238 }
239
240 299 static void put_amf_string(AVIOContext *pb, const char *str)
241 {
242 299 size_t len = strlen(str);
243 299 avio_wb16(pb, len);
244 // Avoid avio_write() if put_amf_string(pb, "") is inlined.
245 if (av_builtin_constant_p(len == 0) && len == 0)
246 return;
247 299 avio_write(pb, str, len);
248 }
249
250 // FLV timestamps are 32 bits signed, RTMP timestamps should be 32-bit unsigned
251 2117 static void put_timestamp(AVIOContext *pb, int64_t ts) {
252 2117 avio_wb24(pb, ts & 0xFFFFFF);
253 2117 avio_w8(pb, (ts >> 24) & 0x7F);
254 2117 }
255
256 2 static void put_eos_tag(AVIOContext *pb, unsigned ts, enum AVCodecID codec_id)
257 {
258 2 uint32_t tag = ff_codec_get_tag(flv_video_codec_ids, codec_id);
259 /* ub[4] FrameType = 1, ub[4] CodecId */
260 2 tag |= 1 << 4;
261 2 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
262 2 avio_wb24(pb, 5); /* Tag Data Size */
263 2 put_timestamp(pb, ts);
264 2 avio_wb24(pb, 0); /* StreamId = 0 */
265 2 avio_w8(pb, tag);
266 2 avio_w8(pb, 2); /* AVC end of sequence */
267 2 avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
268 2 avio_wb32(pb, 16); /* Size of FLV tag */
269 2 }
270
271 271 static void put_amf_double(AVIOContext *pb, double d)
272 {
273 271 avio_w8(pb, AMF_DATA_TYPE_NUMBER);
274 271 avio_wb64(pb, av_double2int(d));
275 271 }
276
277 1 static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
278 {
279 1 avio_w8(pb, abyte);
280 1 }
281
282 2 static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
283 {
284 2 avio_w8(pb, AMF_DATA_TYPE_ARRAY);
285 2 avio_wb32(pb, dw);
286 2 }
287
288 10 static void put_amf_bool(AVIOContext *pb, int b)
289 {
290 10 avio_w8(pb, AMF_DATA_TYPE_BOOL);
291 10 avio_w8(pb, !!b);
292 10 }
293
294 22 static void write_metadata(AVFormatContext *s, unsigned int ts)
295 {
296 22 AVIOContext *pb = s->pb;
297 22 FLVContext *flv = s->priv_data;
298 22 int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);
299 22 int metadata_count = 0;
300 int64_t metadata_count_pos;
301 22 const AVDictionaryEntry *tag = NULL;
302
303 /* write meta_tag */
304 22 avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
305 22 flv->metadata_size_pos = avio_tell(pb);
306 22 avio_wb24(pb, 0); // size of data part (sum of all parts below)
307 22 put_timestamp(pb, ts); // timestamp
308 22 avio_wb24(pb, 0); // reserved
309
310 /* now data of data_size size */
311
312 /* first event name as a string */
313 22 avio_w8(pb, AMF_DATA_TYPE_STRING);
314 22 put_amf_string(pb, "onMetaData"); // 12 bytes
315
316 /* mixed array (hash) with size and string/type/data tuples */
317 22 avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
318 22 metadata_count_pos = avio_tell(pb);
319
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 22 metadata_count = 4 * !!flv->video_par +
320
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 22 5 * !!flv->audio_par +
321 22 1 * !!flv->data_par;
322
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 22 if (write_duration_filesize) {
323 22 metadata_count += 2; // +2 for duration and file size
324 }
325 22 avio_wb32(pb, metadata_count);
326
327
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 22 if (write_duration_filesize) {
328 22 put_amf_string(pb, "duration");
329 22 flv->duration_offset = avio_tell(pb);
330 // fill in the guessed duration, it'll be corrected later if incorrect
331 22 put_amf_double(pb, s->duration / AV_TIME_BASE);
332 }
333
334
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 22 if (flv->video_par) {
335 19 put_amf_string(pb, "width");
336 19 put_amf_double(pb, flv->video_par->width);
337
338 19 put_amf_string(pb, "height");
339 19 put_amf_double(pb, flv->video_par->height);
340
341 19 put_amf_string(pb, "videodatarate");
342 19 put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
343
344
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 19 if (flv->framerate != 0.0) {
345 17 put_amf_string(pb, "framerate");
346 17 put_amf_double(pb, flv->framerate);
347 17 metadata_count++;
348 }
349
350 19 put_amf_string(pb, "videocodecid");
351 19 put_amf_double(pb, flv->video_par->codec_tag);
352 }
353
354
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 22 if (flv->audio_par) {
355 5 put_amf_string(pb, "audiodatarate");
356 5 put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
357
358 5 put_amf_string(pb, "audiosamplerate");
359 5 put_amf_double(pb, flv->audio_par->sample_rate);
360
361 5 put_amf_string(pb, "audiosamplesize");
362
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 5 put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
363
364 5 put_amf_string(pb, "stereo");
365 5 put_amf_bool(pb, flv->audio_par->ch_layout.nb_channels == 2);
366
367 5 put_amf_string(pb, "audiocodecid");
368 5 put_amf_double(pb, flv->audio_par->codec_tag);
369 }
370
371
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 22 if (flv->data_par) {
372 ✗ put_amf_string(pb, "datastream");
373 ✗ put_amf_double(pb, 0.0);
374 }
375
376 22 ff_standardize_creation_time(s);
377
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 36 while ((tag = av_dict_iterate(s->metadata, tag))) {
378
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 14 if( !strcmp(tag->key, "width")
379
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 14 ||!strcmp(tag->key, "height")
380
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381
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382
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383
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 14 ||!strcmp(tag->key, "audiodatarate")
384
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 14 ||!strcmp(tag->key, "audiosamplerate")
385
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 14 ||!strcmp(tag->key, "audiosamplesize")
386
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 14 ||!strcmp(tag->key, "stereo")
387
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 14 ||!strcmp(tag->key, "audiocodecid")
388
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 14 ||!strcmp(tag->key, "duration")
389
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 14 ||!strcmp(tag->key, "onMetaData")
390
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 14 ||!strcmp(tag->key, "datasize")
391
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 14 ||!strcmp(tag->key, "lasttimestamp")
392
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 14 ||!strcmp(tag->key, "totalframes")
393
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 14 ||!strcmp(tag->key, "hasAudio")
394
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 14 ||!strcmp(tag->key, "hasVideo")
395
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 14 ||!strcmp(tag->key, "hasCuePoints")
396
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 14 ||!strcmp(tag->key, "hasMetadata")
397
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 14 ||!strcmp(tag->key, "hasKeyframes")
398 ){
399 ✗ av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
400 ✗ continue;
401 }
402 14 put_amf_string(pb, tag->key);
403 14 avio_w8(pb, AMF_DATA_TYPE_STRING);
404 14 put_amf_string(pb, tag->value);
405 14 metadata_count++;
406 }
407
408
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 22 if (write_duration_filesize) {
409 22 put_amf_string(pb, "filesize");
410 22 flv->filesize_offset = avio_tell(pb);
411 22 put_amf_double(pb, 0); // delayed write
412 }
413
414
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 22 if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
415 1 flv->keyframe_index_size = 0;
416
417 1 put_amf_string(pb, "hasVideo");
418 1 put_amf_bool(pb, !!flv->video_par);
419 1 metadata_count++;
420
421 1 put_amf_string(pb, "hasKeyframes");
422 1 put_amf_bool(pb, 1);
423 1 metadata_count++;
424
425 1 put_amf_string(pb, "hasAudio");
426 1 put_amf_bool(pb, !!flv->audio_par);
427 1 metadata_count++;
428
429 1 put_amf_string(pb, "hasMetadata");
430 1 put_amf_bool(pb, 1);
431 1 metadata_count++;
432
433 1 put_amf_string(pb, "canSeekToEnd");
434 1 put_amf_bool(pb, 1);
435 1 metadata_count++;
436
437 1 put_amf_string(pb, "datasize");
438 1 flv->datasize_offset = avio_tell(pb);
439 1 flv->datasize = 0;
440 1 put_amf_double(pb, flv->datasize);
441 1 metadata_count++;
442
443 1 put_amf_string(pb, "videosize");
444 1 flv->videosize_offset = avio_tell(pb);
445 1 flv->videosize = 0;
446 1 put_amf_double(pb, flv->videosize);
447 1 metadata_count++;
448
449 1 put_amf_string(pb, "audiosize");
450 1 flv->audiosize_offset = avio_tell(pb);
451 1 flv->audiosize = 0;
452 1 put_amf_double(pb, flv->audiosize);
453 1 metadata_count++;
454
455 1 put_amf_string(pb, "lasttimestamp");
456 1 flv->lasttimestamp_offset = avio_tell(pb);
457 1 flv->lasttimestamp = 0;
458 1 put_amf_double(pb, 0);
459 1 metadata_count++;
460
461 1 put_amf_string(pb, "lastkeyframetimestamp");
462 1 flv->lastkeyframetimestamp_offset = avio_tell(pb);
463 1 flv->lastkeyframetimestamp = 0;
464 1 put_amf_double(pb, 0);
465 1 metadata_count++;
466
467 1 put_amf_string(pb, "lastkeyframelocation");
468 1 flv->lastkeyframelocation_offset = avio_tell(pb);
469 1 flv->lastkeyframelocation = 0;
470 1 put_amf_double(pb, 0);
471 1 metadata_count++;
472
473 1 put_amf_string(pb, "keyframes");
474 1 put_amf_byte(pb, AMF_DATA_TYPE_OBJECT);
475 1 metadata_count++;
476
477 1 flv->keyframes_info_offset = avio_tell(pb);
478 }
479
480 22 put_amf_string(pb, "");
481 22 avio_w8(pb, AMF_END_OF_OBJECT);
482
483 /* write total size of tag */
484 22 flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
485
486 22 avio_seek(pb, metadata_count_pos, SEEK_SET);
487 22 avio_wb32(pb, metadata_count);
488
489 22 avio_seek(pb, flv->metadata_size_pos, SEEK_SET);
490 22 avio_wb24(pb, flv->metadata_totalsize);
491 22 avio_skip(pb, flv->metadata_totalsize + 10 - 3);
492 22 flv->metadata_totalsize_pos = avio_tell(pb);
493 22 avio_wb32(pb, flv->metadata_totalsize + 11);
494 22 }
495
496 565 static void write_codec_fourcc(AVIOContext *pb, enum AVCodecID codec_id)
497 {
498
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 565 switch (codec_id) {
499 75 case AV_CODEC_ID_AAC:
500 75 avio_write(pb, "mp4a", 4);
501 75 return;
502 78 case AV_CODEC_ID_OPUS:
503 78 avio_write(pb, "Opus", 4);
504 78 return;
505 18 case AV_CODEC_ID_FLAC:
506 18 avio_write(pb, "fLaC", 4);
507 18 return;
508 ✗ case AV_CODEC_ID_MP3:
509 ✗ avio_write(pb, ".mp3", 4);
510 ✗ return;
511 49 case AV_CODEC_ID_AC3:
512 49 avio_write(pb, "ac-3", 4);
513 49 return;
514 ✗ case AV_CODEC_ID_EAC3:
515 ✗ avio_write(pb, "ec-3", 4);
516 ✗ return;
517 39 case AV_CODEC_ID_H264:
518 39 avio_write(pb, "avc1", 4);
519 39 return;
520 152 case AV_CODEC_ID_HEVC:
521 152 avio_write(pb, "hvc1", 4);
522 152 return;
523 104 case AV_CODEC_ID_AV1:
524 104 avio_write(pb, "av01", 4);
525 104 return;
526 50 case AV_CODEC_ID_VP9:
527 50 avio_write(pb, "vp09", 4);
528 50 return;
529 ✗ default:
530 ✗ av_log(NULL, AV_LOG_ERROR, "Invalid codec FourCC write requested.\n");
531 ✗ av_assert0(0);
532 }
533 }
534
535 748 static void flv_write_metadata_packet(AVFormatContext *s, AVCodecParameters *par, unsigned int ts, int stream_idx)
536 {
537 748 AVIOContext *pb = s->pb;
538 748 FLVContext *flv = s->priv_data;
539 748 AVContentLightMetadata *lightMetadata = NULL;
540 748 AVMasteringDisplayMetadata *displayMetadata = NULL;
541 748 int64_t metadata_size_pos = 0;
542 748 int64_t total_size = 0;
543 748 const AVPacketSideData *side_data = NULL;
544
545
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 748 if (flv->metadata_pkt_written[stream_idx])
546 285 return;
547
548
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 463 if (par->codec_id == AV_CODEC_ID_HEVC || par->codec_id == AV_CODEC_ID_AV1 ||
549
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 458 par->codec_id == AV_CODEC_ID_VP9) {
550 7 int flags_size = 5;
551 7 side_data = av_packet_side_data_get(par->coded_side_data, par->nb_coded_side_data,
552 AV_PKT_DATA_CONTENT_LIGHT_LEVEL);
553
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 7 if (side_data)
554 1 lightMetadata = (AVContentLightMetadata *)side_data->data;
555
556 7 side_data = av_packet_side_data_get(par->coded_side_data, par->nb_coded_side_data,
557 AV_PKT_DATA_MASTERING_DISPLAY_METADATA);
558
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 7 if (side_data)
559 1 displayMetadata = (AVMasteringDisplayMetadata *)side_data->data;
560
561 /*
562 * Reference Enhancing FLV
563 * https://github.com/veovera/enhanced-rtmp/blob/main/enhanced-rtmp.pdf
564 * */
565 7 avio_w8(pb, FLV_TAG_TYPE_VIDEO); //write video tag type
566 7 metadata_size_pos = avio_tell(pb);
567 7 avio_wb24(pb, 0 + flags_size);
568 7 put_timestamp(pb, ts); //ts = pkt->dts, gen
569 7 avio_wb24(pb, flv->reserved);
570
571 7 avio_w8(pb, FLV_IS_EX_HEADER | PacketTypeMetadata | FLV_FRAME_VIDEO_INFO_CMD); // ExVideoTagHeader mode with PacketTypeMetadata
572 7 write_codec_fourcc(pb, par->codec_id);
573
574 7 avio_w8(pb, AMF_DATA_TYPE_STRING);
575 7 put_amf_string(pb, "colorInfo");
576
577 7 avio_w8(pb, AMF_DATA_TYPE_OBJECT);
578
579 7 put_amf_string(pb, "colorConfig"); // colorConfig
580
581 7 avio_w8(pb, AMF_DATA_TYPE_OBJECT);
582
583
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 7 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
584
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 2 par->color_trc < AVCOL_TRC_NB) {
585 2 put_amf_string(pb, "transferCharacteristics"); // color_trc
586 2 put_amf_double(pb, par->color_trc);
587 }
588
589
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 7 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
590
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 2 par->color_space < AVCOL_SPC_NB) {
591 2 put_amf_string(pb, "matrixCoefficients"); // colorspace
592 2 put_amf_double(pb, par->color_space);
593 }
594
595
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 7 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
596
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 2 par->color_primaries < AVCOL_PRI_NB) {
597 2 put_amf_string(pb, "colorPrimaries"); // color_primaries
598 2 put_amf_double(pb, par->color_primaries);
599 }
600
601 7 put_amf_string(pb, "");
602 7 avio_w8(pb, AMF_END_OF_OBJECT);
603
604
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 7 if (lightMetadata) {
605 1 put_amf_string(pb, "hdrCll");
606 1 avio_w8(pb, AMF_DATA_TYPE_OBJECT);
607
608 1 put_amf_string(pb, "maxFall");
609 1 put_amf_double(pb, lightMetadata->MaxFALL);
610
611 1 put_amf_string(pb, "maxCLL");
612 1 put_amf_double(pb, lightMetadata->MaxCLL);
613
614 1 put_amf_string(pb, "");
615 1 avio_w8(pb, AMF_END_OF_OBJECT);
616 }
617
618
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 7 if (displayMetadata && (displayMetadata->has_primaries || displayMetadata->has_luminance)) {
619 1 put_amf_string(pb, "hdrMdcv");
620 1 avio_w8(pb, AMF_DATA_TYPE_OBJECT);
621
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 1 if (displayMetadata->has_primaries) {
622 1 put_amf_string(pb, "redX");
623 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[0][0]));
624
625 1 put_amf_string(pb, "redY");
626 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[0][1]));
627
628 1 put_amf_string(pb, "greenX");
629 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[1][0]));
630
631 1 put_amf_string(pb, "greenY");
632 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[1][1]));
633
634 1 put_amf_string(pb, "blueX");
635 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[2][0]));
636
637 1 put_amf_string(pb, "blueY");
638 1 put_amf_double(pb, av_q2d(displayMetadata->display_primaries[2][1]));
639
640 1 put_amf_string(pb, "whitePointX");
641 1 put_amf_double(pb, av_q2d(displayMetadata->white_point[0]));
642
643 1 put_amf_string(pb, "whitePointY");
644 1 put_amf_double(pb, av_q2d(displayMetadata->white_point[1]));
645 }
646
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 1 if (displayMetadata->has_luminance) {
647 1 put_amf_string(pb, "maxLuminance");
648 1 put_amf_double(pb, av_q2d(displayMetadata->max_luminance));
649
650 1 put_amf_string(pb, "minLuminance");
651 1 put_amf_double(pb, av_q2d(displayMetadata->min_luminance));
652 }
653 1 put_amf_string(pb, "");
654 1 avio_w8(pb, AMF_END_OF_OBJECT);
655 }
656 7 put_amf_string(pb, "");
657 7 avio_w8(pb, AMF_END_OF_OBJECT);
658
659 7 total_size = avio_tell(pb) - metadata_size_pos - 10;
660 7 avio_seek(pb, metadata_size_pos, SEEK_SET);
661 7 avio_wb24(pb, total_size);
662 7 avio_skip(pb, total_size + 10 - 3);
663 7 avio_wb32(pb, total_size + 11); // previous tag size
664 7 flv->metadata_pkt_written[stream_idx] = 1;
665 }
666 }
667
668 ✗ static int unsupported_codec(AVFormatContext *s,
669 const char* type, int codec_id)
670 {
671 ✗ const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
672 ✗ av_log(s, AV_LOG_ERROR,
673 "%s codec %s not compatible with flv\n",
674 type,
675 desc ? desc->name : "unknown");
676 ✗ return AVERROR(ENOSYS);
677 }
678
679 3 static void flv_write_aac_header(AVFormatContext* s, AVCodecParameters* par)
680 {
681 3 AVIOContext *pb = s->pb;
682 3 FLVContext *flv = s->priv_data;
683
684
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 3 if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
685 PutBitContext pbc;
686 int samplerate_index;
687 ✗ int channels = par->ch_layout.nb_channels
688 ✗ - (par->ch_layout.nb_channels == 8 ? 1 : 0);
689 uint8_t data[2];
690
691 ✗ for (samplerate_index = 0; samplerate_index < 16;
692 ✗ samplerate_index++)
693 ✗ if (par->sample_rate
694 ✗ == ff_mpeg4audio_sample_rates[samplerate_index])
695 ✗ break;
696
697 ✗ init_put_bits(&pbc, data, sizeof(data));
698 ✗ put_bits(&pbc, 5, par->profile + 1); //profile
699 ✗ put_bits(&pbc, 4, samplerate_index); //sample rate index
700 ✗ put_bits(&pbc, 4, channels);
701 ✗ put_bits(&pbc, 1, 0); //frame length - 1024 samples
702 ✗ put_bits(&pbc, 1, 0); //does not depend on core coder
703 ✗ put_bits(&pbc, 1, 0); //is not extension
704 ✗ flush_put_bits(&pbc);
705
706 ✗ avio_w8(pb, data[0]);
707 ✗ avio_w8(pb, data[1]);
708
709 ✗ av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
710 ✗ data[0], data[1]);
711 }
712 3 avio_write(pb, par->extradata, par->extradata_size);
713 3 }
714
715 5 static void flv_write_multichannel_body(AVFormatContext* s, AVCodecParameters* par)
716 {
717 5 AVIOContext *pb = s->pb;
718
719
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 5 switch (par->ch_layout.order) {
720 5 case AV_CHANNEL_ORDER_NATIVE:
721 5 avio_w8(pb, AudioChannelOrderNative);
722 5 break;
723 ✗ case AV_CHANNEL_ORDER_CUSTOM:
724 ✗ avio_w8(pb, AudioChannelOrderCustom);
725 ✗ break;
726 ✗ default:
727 ✗ avio_w8(pb, AudioChannelOrderUnspecified);
728 ✗ break;
729 }
730
731 5 avio_w8(pb, par->ch_layout.nb_channels);
732
733
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 5 if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) {
734 // The first 18 entries are identical between FFmpeg and flv
735 5 uint32_t mask = par->ch_layout.u.mask & 0x03FFFF;
736 // The remaining 6 flv entries are in the right order, but start at AV_CHAN_LOW_FREQUENCY_2
737 5 mask |= (par->ch_layout.u.mask >> (AV_CHAN_LOW_FREQUENCY_2 - 18)) & 0xFC0000;
738
739 5 avio_wb32(pb, mask);
740 ✗ } else if (par->ch_layout.order == AV_CHANNEL_ORDER_CUSTOM) {
741 ✗ for (int i = 0; i < par->ch_layout.nb_channels; i++) {
742 ✗ enum AVChannel id = par->ch_layout.u.map[i].id;
743 ✗ if (id >= AV_CHAN_FRONT_LEFT && id <= AV_CHAN_TOP_BACK_RIGHT) {
744 ✗ avio_w8(pb, id - AV_CHAN_FRONT_LEFT + 0);
745 ✗ } else if (id >= AV_CHAN_LOW_FREQUENCY_2 && id <= AV_CHAN_BOTTOM_FRONT_RIGHT) {
746 ✗ avio_w8(pb, id - AV_CHAN_LOW_FREQUENCY_2 + 18);
747 ✗ } else if (id == AV_CHAN_UNUSED) {
748 ✗ avio_w8(pb, 0xFE);
749 } else {
750 ✗ avio_w8(pb, 0xFF); // unknown
751 }
752 }
753 }
754 5 }
755
756 5 static int flv_get_multichannel_body_size(AVCodecParameters* par)
757 {
758 5 int res = 2;
759
760
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 5 if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE)
761 5 res += 4;
762 ✗ else if (par->ch_layout.order == AV_CHANNEL_ORDER_CUSTOM)
763 ✗ res += par->ch_layout.nb_channels;
764
765 5 return res;
766 }
767
768 5 static void flv_write_multichannel_header(AVFormatContext* s, AVCodecParameters* par, int64_t ts, int stream_index)
769 {
770 5 AVIOContext *pb = s->pb;
771 5 FLVContext *flv = s->priv_data;
772
773 5 int track_idx = flv->track_idx_map[stream_index];
774 5 int data_size = flv_get_multichannel_body_size(par);
775
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 5 if (track_idx)
776 4 data_size += 2;
777
778 5 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
779 5 avio_wb24(pb, data_size + 5); // size
780 5 put_timestamp(pb, ts);
781 5 avio_wb24(pb, 0); // streamid
782
783
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 5 if (track_idx) {
784 4 avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeMultitrack);
785 4 avio_w8(pb, MultitrackTypeOneTrack | AudioPacketTypeMultichannelConfig);
786 } else {
787 1 avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeMultichannelConfig);
788 }
789
790 5 write_codec_fourcc(pb, par->codec_id);
791
792
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 5 if (track_idx)
793 4 avio_w8(pb, track_idx);
794
795 5 flv_write_multichannel_body(s, par);
796
797 5 avio_wb32(pb, data_size + 5 + 11); // previous tag size
798 5 }
799
800 32 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par, int64_t ts, int stream_index) {
801 int64_t data_size;
802 32 AVIOContext *pb = s->pb;
803 32 FLVContext *flv = s->priv_data;
804 32 int track_idx = flv->track_idx_map[stream_index];
805 32 int extended_flv = 0;
806
807
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 32 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
808
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 27 || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC
809
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810
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812
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 18 || par->codec_id == AV_CODEC_ID_AC3 || par->codec_id == AV_CODEC_ID_EAC3) {
813 int64_t pos;
814 15 avio_w8(pb,
815
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 15 par->codec_type == AVMEDIA_TYPE_VIDEO ?
816 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
817 15 avio_wb24(pb, 0); // size patched later
818 15 put_timestamp(pb, ts);
819 15 avio_wb24(pb, 0); // streamid
820 15 pos = avio_tell(pb);
821
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 15 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
822
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 3 extended_flv = (par->codec_id == AV_CODEC_ID_AAC && track_idx)
823
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824
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825
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826
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827
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 12 || par->codec_id == AV_CODEC_ID_EAC3;
828
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 6 if (extended_flv) {
830
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 4 if (track_idx) {
831 4 avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeMultitrack);
832 4 avio_w8(pb, MultitrackTypeOneTrack | AudioPacketTypeSequenceStart);
833 } else {
834 ✗ avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeSequenceStart);
835 }
836
837 4 write_codec_fourcc(pb, par->codec_id);
838
839
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 4 if (track_idx)
840 4 avio_w8(pb, track_idx);
841
842
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 4 if (par->codec_id == AV_CODEC_ID_AAC) {
843 1 flv_write_aac_header(s, par);
844
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 3 } else if (par->codec_id == AV_CODEC_ID_OPUS || par->codec_id == AV_CODEC_ID_FLAC) {
845
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 2 av_assert0(par->extradata_size);
846 2 avio_write(pb, par->extradata, par->extradata_size);
847 }
848
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 2 } else if (par->codec_id == AV_CODEC_ID_AAC) {
849 2 avio_w8(pb, get_audio_flags(s, par));
850 2 avio_w8(pb, 0); // AAC sequence header
851
852 2 flv_write_aac_header(s, par);
853 }
854 } else {
855 // If video stream has track_idx > 0 we need to send H.264 as extended video packet
856
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 2 extended_flv = (par->codec_id == AV_CODEC_ID_H264 && track_idx) ||
857
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 8 par->codec_id == AV_CODEC_ID_HEVC ||
858
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 21 par->codec_id == AV_CODEC_ID_AV1 ||
859
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 3 par->codec_id == AV_CODEC_ID_VP9;
860
861
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 9 if (extended_flv) {
862
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 8 if (track_idx) {
863 4 avio_w8(pb, FLV_IS_EX_HEADER | PacketTypeMultitrack | FLV_FRAME_KEY);
864 4 avio_w8(pb, MultitrackTypeOneTrack | PacketTypeSequenceStart);
865 } else {
866 4 avio_w8(pb, FLV_IS_EX_HEADER | PacketTypeSequenceStart | FLV_FRAME_KEY);
867 }
868
869 8 write_codec_fourcc(pb, par->codec_id);
870
871
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 8 if (track_idx)
872 4 avio_w8(pb, track_idx);
873 } else {
874 1 avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
875 1 avio_w8(pb, 0); // AVC sequence header
876 1 avio_wb24(pb, 0); // composition time
877 }
878
879
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 9 if (par->codec_id == AV_CODEC_ID_HEVC)
880 3 ff_isom_write_hvcc(pb, par->extradata, par->extradata_size, 0, s);
881
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 6 else if (par->codec_id == AV_CODEC_ID_AV1)
882 2 ff_isom_write_av1c(pb, par->extradata, par->extradata_size, 1);
883
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 4 else if (par->codec_id == AV_CODEC_ID_VP9)
884 2 ff_isom_write_vpcc(s, pb, par->extradata, par->extradata_size, par);
885
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 2 else if (par->codec_id == AV_CODEC_ID_H264)
886 2 ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
887 ✗ else if (par->codec_id == AV_CODEC_ID_MPEG4)
888 ✗ avio_write(pb, par->extradata, par->extradata_size);
889 else
890 ✗ av_assert0(0);
891 }
892 15 data_size = avio_tell(pb) - pos;
893 15 avio_seek(pb, -data_size - 10, SEEK_CUR);
894 15 avio_wb24(pb, data_size);
895 15 avio_skip(pb, data_size + 10 - 3);
896 15 avio_wb32(pb, data_size + 11); // previous tag size
897 }
898
899
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 37 if (par->codec_type == AVMEDIA_TYPE_AUDIO && (extended_flv ||
900
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 7 (av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO) == 1 &&
901 2 av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO) == 1)))
902 5 flv_write_multichannel_header(s, par, ts, stream_index);
903 32 }
904
905 20 static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
906 {
907 20 FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
908
909
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 20 if (!position) {
910 ✗ av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
911 ✗ return AVERROR(ENOMEM);
912 }
913
914 20 position->keyframe_timestamp = ts;
915 20 position->keyframe_position = pos;
916
917
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 20 if (!flv->filepositions_count) {
918 1 flv->filepositions = position;
919 1 flv->head_filepositions = flv->filepositions;
920 1 position->next = NULL;
921 } else {
922 19 flv->filepositions->next = position;
923 19 position->next = NULL;
924 19 flv->filepositions = flv->filepositions->next;
925 }
926
927 20 flv->filepositions_count++;
928
929 20 return 0;
930 }
931
932 1 static int shift_data(AVFormatContext *s)
933 {
934 int ret;
935 1 int64_t metadata_size = 0;
936 1 FLVContext *flv = s->priv_data;
937
938 1 metadata_size = flv->filepositions_count * 9 * 2 + 10; /* filepositions and times value */
939 1 metadata_size += 2 + 13; /* filepositions String */
940 1 metadata_size += 2 + 5; /* times String */
941 1 metadata_size += 3; /* Object end */
942
943 1 flv->keyframe_index_size = metadata_size;
944
945
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 1 if (metadata_size < 0)
946 ✗ return metadata_size;
947
948 1 ret = ff_format_shift_data(s, flv->keyframes_info_offset, metadata_size);
949
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 1 if (ret < 0)
950 ✗ return ret;
951
952 1 avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
953 1 avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
954
955 1 avio_seek(s->pb, flv->metadata_totalsize_pos + metadata_size, SEEK_SET);
956 1 avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
957
958 1 return 0;
959 }
960
961 22 static int flv_init(struct AVFormatContext *s)
962 {
963 int i;
964 22 int video_ctr = 0, audio_ctr = 0;
965 22 FLVContext *flv = s->priv_data;
966
967 22 flv->last_ts = av_calloc(s->nb_streams, sizeof(*flv->last_ts));
968 22 flv->metadata_pkt_written = av_calloc(s->nb_streams, sizeof(*flv->metadata_pkt_written));
969 22 flv->track_idx_map = av_calloc(s->nb_streams, sizeof(*flv->track_idx_map));
970
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 22 if (!flv->last_ts || !flv->metadata_pkt_written || !flv->track_idx_map)
971 ✗ return AVERROR(ENOMEM);
972
973
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 54 for (i = 0; i < s->nb_streams; i++) {
974 32 AVCodecParameters *par = s->streams[i]->codecpar;
975
976
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 32 switch (par->codec_type) {
977 23 case AVMEDIA_TYPE_VIDEO:
978
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 23 if (video_ctr &&
979
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 4 par->codec_id != AV_CODEC_ID_VP8 &&
980
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 4 par->codec_id != AV_CODEC_ID_VP9 &&
981
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 3 par->codec_id != AV_CODEC_ID_AV1 &&
982
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 2 par->codec_id != AV_CODEC_ID_H264 &&
983
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 1 par->codec_id != AV_CODEC_ID_HEVC) {
984 ✗ av_log(s, AV_LOG_ERROR, "Unsupported multi-track video codec.\n");
985 ✗ return AVERROR(EINVAL);
986 }
987
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 23 if (s->streams[i]->avg_frame_rate.den &&
988
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 21 s->streams[i]->avg_frame_rate.num) {
989 21 flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
990 }
991 23 flv->track_idx_map[i] = video_ctr++;
992
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 23 if (flv->video_par && flv->flags & FLV_ADD_KEYFRAME_INDEX) {
993 ✗ av_log(s, AV_LOG_ERROR,
994 "at most one video stream is supported in flv with keyframe index\n");
995 ✗ return AVERROR(EINVAL);
996
2/2
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 23 } else if (flv->video_par) {
997 4 av_log(s, AV_LOG_WARNING,
998 "more than one video stream is not supported by most flv demuxers.\n");
999 }
1000
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 23 if (!flv->video_par)
1001 19 flv->video_par = par;
1002
1/2
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 23 if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
1003 ✗ return unsupported_codec(s, "Video", par->codec_id);
1004
1005
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 23 if (par->codec_id == AV_CODEC_ID_MPEG4 ||
1006
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 23 par->codec_id == AV_CODEC_ID_H263) {
1007 ✗ int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
1008 ✗ av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
1009 "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
1010
1011 ✗ if (error) {
1012 ✗ av_log(s, AV_LOG_ERROR,
1013 "use vstrict=-1 / -strict -1 to use it anyway.\n");
1014 ✗ return AVERROR(EINVAL);
1015 }
1016
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 23 } else if (par->codec_id == AV_CODEC_ID_VP6) {
1017 ✗ av_log(s, AV_LOG_WARNING,
1018 "Muxing VP6 in flv will produce flipped video on playback.\n");
1019 }
1020 23 break;
1021 9 case AVMEDIA_TYPE_AUDIO:
1022
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 9 if (audio_ctr &&
1023
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 4 par->codec_id != AV_CODEC_ID_AAC &&
1024
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 3 par->codec_id != AV_CODEC_ID_MP3 &&
1025
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 3 par->codec_id != AV_CODEC_ID_OPUS &&
1026
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 2 par->codec_id != AV_CODEC_ID_FLAC &&
1027
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 1 par->codec_id != AV_CODEC_ID_AC3 &&
1028 ✗ par->codec_id != AV_CODEC_ID_EAC3) {
1029 ✗ av_log(s, AV_LOG_ERROR, "Unsupported multi-track audio codec.\n");
1030 ✗ return AVERROR(EINVAL);
1031 }
1032 9 flv->track_idx_map[i] = audio_ctr++;
1033
2/2
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 9 if (flv->audio_par)
1034 4 av_log(s, AV_LOG_WARNING,
1035 "more than one audio stream is not supported by most flv demuxers.\n");
1036 else
1037 5 flv->audio_par = par;
1038
1/2
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 9 if (get_audio_flags(s, par) < 0)
1039 ✗ return unsupported_codec(s, "Audio", par->codec_id);
1040
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 9 if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
1041 ✗ av_log(s, AV_LOG_WARNING,
1042 "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
1043 9 break;
1044 ✗ case AVMEDIA_TYPE_DATA:
1045 ✗ if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
1046 ✗ return unsupported_codec(s, "Data", par->codec_id);
1047 ✗ flv->data_par = par;
1048 ✗ break;
1049 ✗ case AVMEDIA_TYPE_SUBTITLE:
1050 ✗ if (par->codec_id != AV_CODEC_ID_TEXT) {
1051 ✗ av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
1052 avcodec_get_name(par->codec_id), i);
1053 ✗ return AVERROR_INVALIDDATA;
1054 }
1055 ✗ flv->data_par = par;
1056 ✗ break;
1057 ✗ default:
1058 ✗ av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
1059 av_get_media_type_string(par->codec_type), i);
1060 ✗ return AVERROR(EINVAL);
1061 }
1062 32 avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
1063 32 flv->last_ts[i] = -1;
1064 }
1065
1066 22 flv->delay = AV_NOPTS_VALUE;
1067
1068 22 return 0;
1069 }
1070
1071 22 static int flv_write_header(AVFormatContext *s)
1072 {
1073 int i;
1074 22 AVIOContext *pb = s->pb;
1075 22 FLVContext *flv = s->priv_data;
1076
1077 22 avio_write(pb, "FLV", 3);
1078 22 avio_w8(pb, 1);
1079
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 22 avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
1080 22 FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
1081 22 avio_wb32(pb, 9);
1082 22 avio_wb32(pb, 0);
1083
1084
2/2
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 54 for (i = 0; i < s->nb_streams; i++)
1085
1/2
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 32 if (s->streams[i]->codecpar->codec_tag == 5) {
1086 ✗ avio_w8(pb, 8); // message type
1087 ✗ avio_wb24(pb, 0); // include flags
1088 ✗ avio_wb24(pb, 0); // time stamp
1089 ✗ avio_wb32(pb, 0); // reserved
1090 ✗ avio_wb32(pb, 11); // size
1091 ✗ flv->reserved = 5;
1092 }
1093
1094
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 22 if (flv->flags & FLV_NO_METADATA) {
1095 ✗ pb->seekable = 0;
1096 } else {
1097 22 write_metadata(s, 0);
1098 }
1099
1100
2/2
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 54 for (i = 0; i < s->nb_streams; i++) {
1101 32 flv_write_codec_header(s, s->streams[i]->codecpar, 0, i);
1102 }
1103
1104 22 flv->datastart_offset = avio_tell(pb);
1105 22 return 0;
1106 }
1107
1108 22 static int flv_write_trailer(AVFormatContext *s)
1109 {
1110 int64_t file_size;
1111 22 AVIOContext *pb = s->pb;
1112 22 FLVContext *flv = s->priv_data;
1113 22 int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
1114 int i, res;
1115 22 int64_t cur_pos = avio_tell(s->pb);
1116
1117
2/2
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 22 if (build_keyframes_idx) {
1118 const FLVFileposition *newflv_posinfo;
1119
1120 1 avio_seek(pb, flv->videosize_offset, SEEK_SET);
1121 1 put_amf_double(pb, flv->videosize);
1122
1123 1 avio_seek(pb, flv->audiosize_offset, SEEK_SET);
1124 1 put_amf_double(pb, flv->audiosize);
1125
1126 1 avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
1127 1 put_amf_double(pb, flv->lasttimestamp);
1128
1129 1 avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
1130 1 put_amf_double(pb, flv->lastkeyframetimestamp);
1131
1132 1 avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
1133 1 put_amf_double(pb, flv->lastkeyframelocation + flv->keyframe_index_size);
1134 1 avio_seek(pb, cur_pos, SEEK_SET);
1135
1136 1 res = shift_data(s);
1137
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1 times.
 1 if (res < 0) {
1138 ✗ goto end;
1139 }
1140 1 avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
1141 1 put_amf_string(pb, "filepositions");
1142 1 put_amf_dword_array(pb, flv->filepositions_count);
1143
2/2
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 21 for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
1144 20 put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
1145 }
1146
1147 1 put_amf_string(pb, "times");
1148 1 put_amf_dword_array(pb, flv->filepositions_count);
1149
2/2
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 21 for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
1150 20 put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
1151 }
1152
1153 1 put_amf_string(pb, "");
1154 1 avio_w8(pb, AMF_END_OF_OBJECT);
1155
1156 1 avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
1157 }
1158
1159 21 end:
1160
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✓ Branch 1 taken 22 times.
 22 if (flv->flags & FLV_NO_SEQUENCE_END) {
1161 ✗ av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
1162 } else {
1163 /* Add EOS tag */
1164
2/2
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 54 for (i = 0; i < s->nb_streams; i++) {
1165 32 AVCodecParameters *par = s->streams[i]->codecpar;
1166
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 32 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
1167
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 23 (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
1168 2 put_eos_tag(pb, flv->last_ts[i], par->codec_id);
1169 }
1170 }
1171
1172 22 file_size = avio_tell(pb);
1173
1174
2/2
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✓ Branch 1 taken 21 times.
 22 if (build_keyframes_idx) {
1175 1 flv->datasize = file_size - flv->datastart_offset;
1176 1 avio_seek(pb, flv->datasize_offset, SEEK_SET);
1177 1 put_amf_double(pb, flv->datasize);
1178 }
1179
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 22 if (!(flv->flags & FLV_NO_METADATA)) {
1180
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 22 if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
1181 /* update information */
1182
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✓ Branch 2 taken 22 times.
 22 if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
1183 ✗ av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
1184 } else {
1185 22 put_amf_double(pb, flv->duration / (double)1000);
1186 }
1187
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 22 if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) {
1188 ✗ av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
1189 } else {
1190 22 put_amf_double(pb, file_size);
1191 }
1192 }
1193 }
1194
1195 22 return 0;
1196 }
1197
1198 2066 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
1199 {
1200 2066 AVIOContext *pb = s->pb;
1201 2066 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1202 2066 FLVContext *flv = s->priv_data;
1203 unsigned ts;
1204 2066 int size = pkt->size;
1205 2066 uint8_t *data = NULL;
1206
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 2066 uint8_t frametype = pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
1207 2066 int flags = -1, flags_size, ret = 0;
1208 2066 int64_t cur_offset = avio_tell(pb);
1209 2066 int track_idx = flv->track_idx_map[pkt->stream_index];
1210
1211
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 288 int extended_audio = (par->codec_id == AV_CODEC_ID_AAC && track_idx)
1212
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 1994 || (par->codec_id == AV_CODEC_ID_MP3 && track_idx)
1213
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 1994 || par->codec_id == AV_CODEC_ID_OPUS
1214
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✓ Branch 1 taken 16 times.
 1918 || par->codec_id == AV_CODEC_ID_FLAC
1215
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 1902 || par->codec_id == AV_CODEC_ID_AC3
1216
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✓ Branch 3 taken 1855 times.
 4132 || par->codec_id == AV_CODEC_ID_EAC3;
1217
1218
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 2066 if (extended_audio)
1219 211 flags_size = 5;
1220
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✗ Branch 3 not taken.
 1855 else if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
1221
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✓ Branch 3 taken 1639 times.
 1855 par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
1222 216 flags_size = 2;
1223
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✗ Branch 3 not taken.
 1639 else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4 ||
1224
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 1563 par->codec_id == AV_CODEC_ID_HEVC || par->codec_id == AV_CODEC_ID_AV1 ||
1225
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✓ Branch 1 taken 1271 times.
 1317 par->codec_id == AV_CODEC_ID_VP9)
1226 368 flags_size = 5;
1227 else
1228 1271 flags_size = 1;
1229
1230
5/6
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 2066 if ((par->codec_type == AVMEDIA_TYPE_VIDEO || par->codec_type == AVMEDIA_TYPE_AUDIO) && track_idx)
1231 357 flags_size += 2; // additional header bytes for multi-track flv
1232
1233
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 2066 if ((par->codec_id == AV_CODEC_ID_HEVC ||
1234
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 1920 (par->codec_id == AV_CODEC_ID_H264 && track_idx))
1235
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 184 && pkt->pts != pkt->dts)
1236 163 flags_size += 3;
1237
1238
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 2066 if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
1239
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 1702 || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC
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 1556 || par->codec_id == AV_CODEC_ID_AV1 || par->codec_id == AV_CODEC_ID_VP9
1241
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 1410 || par->codec_id == AV_CODEC_ID_OPUS || par->codec_id == AV_CODEC_ID_FLAC) {
1242 size_t side_size;
1243 748 uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1244
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 748 if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
1245 ✗ ret = ff_alloc_extradata(par, side_size);
1246 ✗ if (ret < 0)
1247 ✗ return ret;
1248 ✗ memcpy(par->extradata, side, side_size);
1249 ✗ flv_write_codec_header(s, par, pkt->dts, pkt->stream_index);
1250 }
1251 748 flv_write_metadata_packet(s, par, pkt->dts, pkt->stream_index);
1252 }
1253
1254
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 2066 if (flv->delay == AV_NOPTS_VALUE)
1255 22 flv->delay = -pkt->dts;
1256
1257
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 2066 if (pkt->dts < -flv->delay) {
1258 ✗ av_log(s, AV_LOG_WARNING,
1259 "Packets are not in the proper order with respect to DTS\n");
1260 ✗ return AVERROR(EINVAL);
1261 }
1262
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 2066 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4 ||
1263
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 1990 par->codec_id == AV_CODEC_ID_HEVC || par->codec_id == AV_CODEC_ID_AV1 ||
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 1744 par->codec_id == AV_CODEC_ID_VP9) {
1265
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 368 if (pkt->pts == AV_NOPTS_VALUE) {
1266 ✗ av_log(s, AV_LOG_ERROR, "Packet is missing PTS\n");
1267 ✗ return AVERROR(EINVAL);
1268 }
1269 }
1270
1271 2066 ts = pkt->dts;
1272
1273
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 2066 if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
1274 ✗ write_metadata(s, ts);
1275 ✗ s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
1276 }
1277
1278 2066 avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000),
1279
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 2066 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);
1280
1281
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 2066 switch (par->codec_type) {
1282 1133 case AVMEDIA_TYPE_VIDEO:
1283 1133 avio_w8(pb, FLV_TAG_TYPE_VIDEO);
1284
1285 1133 flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
1286
1287 1133 flags |= frametype;
1288 1133 break;
1289 933 case AVMEDIA_TYPE_AUDIO:
1290 933 flags = get_audio_flags(s, par);
1291
1292 933 avio_w8(pb, FLV_TAG_TYPE_AUDIO);
1293 933 break;
1294 ✗ case AVMEDIA_TYPE_SUBTITLE:
1295 case AVMEDIA_TYPE_DATA:
1296 ✗ avio_w8(pb, FLV_TAG_TYPE_META);
1297 ✗ break;
1298 ✗ default:
1299 ✗ return AVERROR(EINVAL);
1300 }
1301
1302
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 2066 if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
1303 /* check if extradata looks like mp4 formatted */
1304
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 76 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
1305 ✗ if ((ret = ff_nal_parse_units_buf(pkt->data, &data, &size)) < 0)
1306 ✗ return ret;
1307
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 1990 } else if (par->codec_id == AV_CODEC_ID_HEVC) {
1308
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 146 if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
1309 ✗ if ((ret = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL)) < 0)
1310 ✗ return ret;
1311
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 1844 } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
1312
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 288 (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
1313 ✗ if (!s->streams[pkt->stream_index]->nb_frames) {
1314 ✗ av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
1315 "use the audio bitstream filter 'aac_adtstoasc' to fix it "
1316 "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
1317 ✗ return AVERROR_INVALIDDATA;
1318 }
1319 ✗ av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
1320 }
1321
1322 /* check Speex packet duration */
1323
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 2066 if (par->codec_id == AV_CODEC_ID_SPEEX && ts - flv->last_ts[pkt->stream_index] > 160)
1324 ✗ av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
1325 "8 frames per packet. Adobe Flash "
1326 "Player cannot handle this!\n");
1327
1328
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 2066 if (flv->last_ts[pkt->stream_index] < ts)
1329 2066 flv->last_ts[pkt->stream_index] = ts;
1330
1331
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 2066 if (size + flags_size >= 1<<24) {
1332 ✗ av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
1333 size + flags_size, 1<<24);
1334 ✗ ret = AVERROR(EINVAL);
1335 ✗ goto fail;
1336 }
1337
1338 2066 avio_wb24(pb, size + flags_size);
1339 2066 put_timestamp(pb, ts);
1340 2066 avio_wb24(pb, flv->reserved);
1341
1342
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 2066 if (par->codec_type == AVMEDIA_TYPE_DATA ||
1343
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 2066 par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1344 int data_size;
1345 ✗ int64_t metadata_size_pos = avio_tell(pb);
1346 ✗ if (par->codec_id == AV_CODEC_ID_TEXT) {
1347 // legacy FFmpeg magic?
1348 ✗ avio_w8(pb, AMF_DATA_TYPE_STRING);
1349 ✗ put_amf_string(pb, "onTextData");
1350 ✗ avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
1351 ✗ avio_wb32(pb, 2);
1352 ✗ put_amf_string(pb, "type");
1353 ✗ avio_w8(pb, AMF_DATA_TYPE_STRING);
1354 ✗ put_amf_string(pb, "Text");
1355 ✗ put_amf_string(pb, "text");
1356 ✗ avio_w8(pb, AMF_DATA_TYPE_STRING);
1357 ✗ put_amf_string(pb, pkt->data);
1358 ✗ put_amf_string(pb, "");
1359 ✗ avio_w8(pb, AMF_END_OF_OBJECT);
1360 } else {
1361 // just pass the metadata through
1362 ✗ avio_write(pb, data ? data : pkt->data, size);
1363 }
1364 /* write total size of tag */
1365 ✗ data_size = avio_tell(pb) - metadata_size_pos;
1366 ✗ avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
1367 ✗ avio_wb24(pb, data_size);
1368 ✗ avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
1369 ✗ avio_wb32(pb, data_size + 11);
1370 } else {
1371
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 76 int extended_video = (par->codec_id == AV_CODEC_ID_H264 && track_idx) ||
1372
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 2028 par->codec_id == AV_CODEC_ID_HEVC ||
1373
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 5914 par->codec_id == AV_CODEC_ID_AV1 ||
1374
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 1782 par->codec_id == AV_CODEC_ID_VP9;
1375
1376
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 2066 if (extended_video) {
1377
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 622 int h2645 = par->codec_id == AV_CODEC_ID_H264 ||
1378
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 292 par->codec_id == AV_CODEC_ID_HEVC;
1379 330 int pkttype = PacketTypeCodedFrames;
1380 // Optimisation for HEVC/H264: Do not send composition time if DTS == PTS
1381
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 330 if (h2645 && pkt->pts == pkt->dts)
1382 21 pkttype = PacketTypeCodedFramesX;
1383
1384
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 330 if (track_idx) {
1385 146 avio_w8(pb, FLV_IS_EX_HEADER | PacketTypeMultitrack | frametype);
1386 146 avio_w8(pb, MultitrackTypeOneTrack | pkttype);
1387 } else {
1388 184 avio_w8(pb, FLV_IS_EX_HEADER | pkttype | frametype);
1389 }
1390
1391 330 write_codec_fourcc(pb, par->codec_id);
1392
1393
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 330 if (track_idx)
1394 146 avio_w8(pb, track_idx);
1395
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 330 if (h2645 && pkttype == PacketTypeCodedFrames)
1396 163 avio_wb24(pb, pkt->pts - pkt->dts);
1397
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 1736 } else if (extended_audio) {
1398
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 211 if (track_idx) {
1399 211 avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeMultitrack);
1400 211 avio_w8(pb, MultitrackTypeOneTrack | AudioPacketTypeCodedFrames);
1401 } else {
1402 ✗ avio_w8(pb, FLV_CODECID_EX_HEADER | AudioPacketTypeCodedFrames);
1403 }
1404 211 write_codec_fourcc(pb, par->codec_id);
1405
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 211 if (track_idx)
1406 211 avio_w8(pb, track_idx);
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 1525 } else if (track_idx) {
1408 ✗ av_log(s, AV_LOG_ERROR, "Attempted to write legacy codec into extended flv track.\n");
1409 ✗ ret = AVERROR(EINVAL);
1410 ✗ goto fail;
1411 } else {
1412 av_assert1(flags >= 0);
1413 1525 avio_w8(pb, flags);
1414
1415
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 1525 if (par->codec_id == AV_CODEC_ID_VP6) {
1416 ✗ avio_w8(pb,0);
1417
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 1525 } else if (par->codec_id == AV_CODEC_ID_VP6F ||
1418
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 1525 par->codec_id == AV_CODEC_ID_VP6A) {
1419 ✗ if (par->extradata_size)
1420 ✗ avio_w8(pb, par->extradata[0]);
1421 else
1422 ✗ avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
1423 ✗ (FFALIGN(par->height, 16) - par->height));
1424
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 1525 } else if (par->codec_id == AV_CODEC_ID_AAC) {
1425 216 avio_w8(pb, 1); // AAC raw
1426
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 1309 } else if (par->codec_id == AV_CODEC_ID_H264 ||
1427
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 1271 par->codec_id == AV_CODEC_ID_MPEG4) {
1428 38 avio_w8(pb, 1); // AVC NALU
1429 38 avio_wb24(pb, pkt->pts - pkt->dts);
1430 }
1431 }
1432
1433
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 2066 avio_write(pb, data ? data : pkt->data, size);
1434
1435 2066 avio_wb32(pb, size + flags_size + 11); // previous tag size
1436 2066 flv->duration = FFMAX(flv->duration,
1437 pkt->pts + flv->delay + pkt->duration);
1438 }
1439
1440
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 2066 if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
1441
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 140 switch (par->codec_type) {
1442 140 case AVMEDIA_TYPE_VIDEO:
1443 140 flv->videosize += (avio_tell(pb) - cur_offset);
1444 140 flv->lasttimestamp = pkt->dts / 1000.0;
1445
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 140 if (pkt->flags & AV_PKT_FLAG_KEY) {
1446 20 flv->lastkeyframetimestamp = flv->lasttimestamp;
1447 20 flv->lastkeyframelocation = cur_offset;
1448 20 ret = flv_append_keyframe_info(s, flv, flv->lasttimestamp, cur_offset);
1449
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 20 if (ret < 0)
1450 ✗ goto fail;
1451 }
1452 140 break;
1453
1454 ✗ case AVMEDIA_TYPE_AUDIO:
1455 ✗ flv->audiosize += (avio_tell(pb) - cur_offset);
1456 ✗ break;
1457
1458 ✗ default:
1459 ✗ av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
1460 ✗ break;
1461 }
1462 }
1463 1926 fail:
1464 2066 av_free(data);
1465
1466 2066 return ret;
1467 }
1468
1469 32 static int flv_check_bitstream(AVFormatContext *s, AVStream *st,
1470 const AVPacket *pkt)
1471 {
1472
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 32 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1473
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 3 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
1474 ✗ return ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
1475 }
1476
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 32 if (!st->codecpar->extradata_size &&
1477
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 19 (st->codecpar->codec_id == AV_CODEC_ID_H264 ||
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 19 st->codecpar->codec_id == AV_CODEC_ID_HEVC ||
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 19 st->codecpar->codec_id == AV_CODEC_ID_AV1 ||
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 19 st->codecpar->codec_id == AV_CODEC_ID_MPEG4))
1481 ✗ return ff_stream_add_bitstream_filter(st, "extract_extradata", NULL);
1482 32 return 1;
1483 }
1484
1485 22 static void flv_deinit(AVFormatContext *s)
1486 {
1487 22 FLVContext *flv = s->priv_data;
1488 22 FLVFileposition *filepos = flv->head_filepositions;
1489
1490
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 42 while (filepos) {
1491 20 FLVFileposition *next = filepos->next;
1492 20 av_free(filepos);
1493 20 filepos = next;
1494 }
1495 22 flv->filepositions = flv->head_filepositions = NULL;
1496 22 flv->filepositions_count = 0;
1497
1498 22 av_freep(&flv->last_ts);
1499 22 av_freep(&flv->metadata_pkt_written);
1500 22 av_freep(&flv->track_idx_map);
1501 22 }
1502
1503 static const AVOption options[] = {
1504 { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "flvflags" },
1505 { "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, .unit = "flvflags" },
1506 { "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "flvflags" },
1507 { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "flvflags" },
1508 { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "flvflags" },
1509 { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, .unit = "flvflags" },
1510 { NULL },
1511 };
1512
1513 static const AVClass flv_muxer_class = {
1514 .class_name = "flv muxer",
1515 .item_name = av_default_item_name,
1516 .option = options,
1517 .version = LIBAVUTIL_VERSION_INT,
1518 };
1519
1520 const FFOutputFormat ff_flv_muxer = {
1521 .p.name = "flv",
1522 .p.long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1523 .p.mime_type = "video/x-flv",
1524 .p.extensions = "flv",
1525 .priv_data_size = sizeof(FLVContext),
1526 .p.audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
1527 .p.video_codec = AV_CODEC_ID_FLV1,
1528 .init = flv_init,
1529 .write_header = flv_write_header,
1530 .write_packet = flv_write_packet,
1531 .write_trailer = flv_write_trailer,
1532 .deinit = flv_deinit,
1533 .check_bitstream= flv_check_bitstream,
1534 .p.codec_tag = (const AVCodecTag* const []) {
1535 flv_video_codec_ids, flv_audio_codec_ids, 0
1536 },
1537 .p.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1538 AVFMT_TS_NONSTRICT,
1539 .p.priv_class = &flv_muxer_class,
1540 };
1541