FFmpeg: libavformat/tee.c Source File

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libavformat

tee.c

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1 /*

2 * Tee pseudo-muxer

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 License

9 * 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

15 * GNU Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public License

18 * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,

19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

23 #include "libavutil/avutil.h"

24 #include "libavutil/avstring.h"

25 #include "libavutil/opt.h"

26 #include "internal.h"

27 #include "avformat.h"

28 #include "avio_internal.h"

30 #define MAX_SLAVES 16

32 typedef struct {

33 AVFormatContext *avf;

34 AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream

36 /** map from input to output streams indexes,

37 * disabled output streams are set to -1 */

38 int *stream_map;

39 } TeeSlave;

41 typedef struct TeeContext {

42 const AVClass *class;

43 unsigned nb_slaves;

44 TeeSlave slaves[MAX_SLAVES];

45 } TeeContext;

47 static const char *const slave_delim = "|";

48 static const char *const slave_opt_open = "[";

49 static const char *const slave_opt_close = "]";

50 static const char *const slave_opt_delim = ":]"; /* must have the close too */

51 static const char *const slave_bsfs_spec_sep = "/";

52 static const char *const slave_select_sep = ",";

54 static const AVClass tee_muxer_class = {

55 .class_name = "Tee muxer",

56 .item_name = av_default_item_name,

57 .version = LIBAVUTIL_VERSION_INT,

58 };

60 static int parse_slave_options(void *log, char *slave,

61 AVDictionary **options, char **filename)

62 {

63 const char *p;

64 char *key, *val;

65 int ret;

67 if (!strspn(slave, slave_opt_open)) {

68 *filename = slave;

69 return 0;

70 }

71 p = slave + 1;

72 if (strspn(p, slave_opt_close)) {

73 *filename = (char *)p + 1;

74 return 0;

75 }

76 while (1) {

77 ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);

78 if (ret < 0) {

79 av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);

80 goto fail;

81 }

82 ret = av_dict_set(options, key, val,

83 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);

84 if (ret < 0)

85 goto fail;

86 if (strspn(p, slave_opt_close))

87 break;

88 p++;

89 }

90 *filename = (char *)p + 1;

91 return 0;

93 fail:

94 av_dict_free(options);

95 return ret;

96 }

98 /**

99 * Parse list of bitstream filters and add them to the list of filters

100 * pointed to by bsfs.

101 *

102 * The list must be specified in the form:

103 * BSFS ::= BSF[,BSFS]

104 */

105 static int parse_bsfs(void *log_ctx, const char *bsfs_spec,

106 AVBitStreamFilterContext **bsfs)

107 {

108 char *bsf_name, *buf, *dup, *saveptr;

109 int ret = 0;

110

111 if (!(dup = buf = av_strdup(bsfs_spec)))

112 return AVERROR(ENOMEM);

113

114 while (bsf_name = av_strtok(buf, ",", &saveptr)) {

115 AVBitStreamFilterContext *bsf = av_bitstream_filter_init(bsf_name);

116

117 if (!bsf) {

118 av_log(log_ctx, AV_LOG_ERROR,

119 "Cannot initialize bitstream filter with name '%s', "

120 "unknown filter or internal error happened\n",

121 bsf_name);

122 ret = AVERROR_UNKNOWN;

123 goto end;

124 }

125

126 /* append bsf context to the list of bsf contexts */

127 *bsfs = bsf;

128 bsfs = &bsf->next;

129

130 buf = NULL;

131 }

132

133 end:

134 av_free(dup);

135 return ret;

136 }

137

138 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)

139 {

140 int i, ret;

141 AVDictionary *options = NULL;

142 AVDictionaryEntry *entry;

143 char *filename;

144 char *format = NULL, *select = NULL;

145 AVFormatContext *avf2 = NULL;

146 AVStream *st, *st2;

147 int stream_count;

148 int fullret;

149 char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;

150

151 if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)

152 return ret;

153

154 #define STEAL_OPTION(option, field) do { \

155 if ((entry = av_dict_get(options, option, NULL, 0))) { \

156 field = entry->value; \

157 entry->value = NULL; /* prevent it from being freed */ \

158 av_dict_set(&options, option, NULL, 0); \

159 } \

160 } while (0)

161

162 STEAL_OPTION("f", format);

163 STEAL_OPTION("select", select);

164

165 ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);

166 if (ret < 0)

167 goto end;

168 av_dict_copy(&avf2->metadata, avf->metadata, 0);

169 avf2->opaque = avf->opaque;

170 avf2->io_open = avf->io_open;

171 avf2->io_close = avf->io_close;

172

173 tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));

174 if (!tee_slave->stream_map) {

175 ret = AVERROR(ENOMEM);

176 goto end;

177 }

178

179 stream_count = 0;

180 for (i = 0; i < avf->nb_streams; i++) {

181 st = avf->streams[i];

182 if (select) {

183 tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop

184 if (!tmp_select) {

185 ret = AVERROR(ENOMEM);

186 goto end;

187 }

188 fullret = 0;

189 first_subselect = tmp_select;

190 next_subselect = NULL;

191 while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {

192 first_subselect = NULL;

193

194 ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);

195 if (ret < 0) {

196 av_log(avf, AV_LOG_ERROR,

197 "Invalid stream specifier '%s' for output '%s'\n",

198 subselect, slave);

199 goto end;

200 }

201 if (ret != 0) {

202 fullret = 1; // match

203 break;

204 }

205 }

206 av_freep(&tmp_select);

207

208 if (fullret == 0) { /* no match */

209 tee_slave->stream_map[i] = -1;

210 continue;

211 }

212 }

213 tee_slave->stream_map[i] = stream_count++;

214

215 if (!(st2 = avformat_new_stream(avf2, NULL))) {

216 ret = AVERROR(ENOMEM);

217 goto end;

218 }

219 st2->id = st->id;

220 st2->r_frame_rate = st->r_frame_rate;

221 st2->time_base = st->time_base;

222 st2->start_time = st->start_time;

223 st2->duration = st->duration;

224 st2->nb_frames = st->nb_frames;

225 st2->disposition = st->disposition;

226 st2->sample_aspect_ratio = st->sample_aspect_ratio;

227 st2->avg_frame_rate = st->avg_frame_rate;

228 av_dict_copy(&st2->metadata, st->metadata, 0);

229 if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)

230 goto end;

231 }

232

233 if (!(avf2->oformat->flags & AVFMT_NOFILE)) {

234 if ((ret = avf2->io_open(avf2, &avf2->pb, filename, AVIO_FLAG_WRITE, NULL)) < 0) {

235 av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",

236 slave, av_err2str(ret));

237 goto end;

238 }

239 }

240

241 if ((ret = avformat_write_header(avf2, &options)) < 0) {

242 av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",

243 slave, av_err2str(ret));

244 goto end;

245 }

246

247 tee_slave->avf = avf2;

248 tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));

249 if (!tee_slave->bsfs) {

250 ret = AVERROR(ENOMEM);

251 goto end;

252 }

253

254 entry = NULL;

255 while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {

256 const char *spec = entry->key + strlen("bsfs");

257 if (*spec) {

258 if (strspn(spec, slave_bsfs_spec_sep) != 1) {

259 av_log(avf, AV_LOG_ERROR,

260 "Specifier separator in '%s' is '%c', but only characters '%s' "

261 "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);

262 return AVERROR(EINVAL);

263 }

264 spec++; /* consume separator */

265 }

266

267 for (i = 0; i < avf2->nb_streams; i++) {

268 ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);

269 if (ret < 0) {

270 av_log(avf, AV_LOG_ERROR,

271 "Invalid stream specifier '%s' in bsfs option '%s' for slave "

272 "output '%s'\n", spec, entry->key, filename);

273 goto end;

274 }

275

276 if (ret > 0) {

277 av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "

278 "output '%s'\n", spec, entry->value, i, filename);

279 if (tee_slave->bsfs[i]) {

280 av_log(avf, AV_LOG_WARNING,

281 "Duplicate bsfs specification associated to stream %d of slave "

282 "output '%s', filters will be ignored\n", i, filename);

283 continue;

284 }

285 ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);

286 if (ret < 0) {

287 av_log(avf, AV_LOG_ERROR,

288 "Error parsing bitstream filter sequence '%s' associated to "

289 "stream %d of slave output '%s'\n", entry->value, i, filename);

290 goto end;

291 }

292 }

293 }

294

295 av_dict_set(&options, entry->key, NULL, 0);

296 }

297

298 if (options) {

299 entry = NULL;

300 while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))

301 av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);

302 ret = AVERROR_OPTION_NOT_FOUND;

303 goto end;

304 }

305

306 end:

307 av_free(format);

308 av_free(select);

309 av_dict_free(&options);

310 av_freep(&tmp_select);

311 return ret;

312 }

313

314 static void close_slaves(AVFormatContext *avf)

315 {

316 TeeContext *tee = avf->priv_data;

317 AVFormatContext *avf2;

318 unsigned i, j;

319

320 for (i = 0; i < tee->nb_slaves; i++) {

321 avf2 = tee->slaves[i].avf;

322

323 for (j = 0; j < avf2->nb_streams; j++) {

324 AVBitStreamFilterContext *bsf_next, *bsf = tee->slaves[i].bsfs[j];

325 while (bsf) {

326 bsf_next = bsf->next;

327 av_bitstream_filter_close(bsf);

328 bsf = bsf_next;

329 }

330 }

331 av_freep(&tee->slaves[i].stream_map);

332 av_freep(&tee->slaves[i].bsfs);

333

334 ff_format_io_close(avf2, &avf2->pb);

335 avformat_free_context(avf2);

336 tee->slaves[i].avf = NULL;

337 }

338 }

339

340 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)

341 {

342 int i;

343 av_log(log_ctx, log_level, "filename:'%s' format:%s\n",

344 slave->avf->filename, slave->avf->oformat->name);

345 for (i = 0; i < slave->avf->nb_streams; i++) {

346 AVStream *st = slave->avf->streams[i];

347 AVBitStreamFilterContext *bsf = slave->bsfs[i];

348

349 av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",

350 i, avcodec_get_name(st->codec->codec_id),

351 av_get_media_type_string(st->codec->codec_type));

352 if (bsf) {

353 av_log(log_ctx, log_level, " bsfs:");

354 while (bsf) {

355 av_log(log_ctx, log_level, "%s%s",

356 bsf->filter->name, bsf->next ? "," : "");

357 bsf = bsf->next;

358 }

359 }

360 av_log(log_ctx, log_level, "\n");

361 }

362 }

363

364 static int tee_write_header(AVFormatContext *avf)

365 {

366 TeeContext *tee = avf->priv_data;

367 unsigned nb_slaves = 0, i;

368 const char *filename = avf->filename;

369 char *slaves[MAX_SLAVES];

370 int ret;

371

372 while (*filename) {

373 if (nb_slaves == MAX_SLAVES) {

374 av_log(avf, AV_LOG_ERROR, "Maximum %d slave muxers reached.\n",

375 MAX_SLAVES);

376 ret = AVERROR_PATCHWELCOME;

377 goto fail;

378 }

379 if (!(slaves[nb_slaves++] = av_get_token(&filename, slave_delim))) {

380 ret = AVERROR(ENOMEM);

381 goto fail;

382 }

383 if (strspn(filename, slave_delim))

384 filename++;

385 }

386

387 for (i = 0; i < nb_slaves; i++) {

388 if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0)

389 goto fail;

390 log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);

391 av_freep(&slaves[i]);

392 }

393

394 tee->nb_slaves = nb_slaves;

395

396 for (i = 0; i < avf->nb_streams; i++) {

397 int j, mapped = 0;

398 for (j = 0; j < tee->nb_slaves; j++)

399 mapped += tee->slaves[j].stream_map[i] >= 0;

400 if (!mapped)

401 av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "

402 "to any slave.\n", i);

403 }

404 return 0;

405

406 fail:

407 for (i = 0; i < nb_slaves; i++)

408 av_freep(&slaves[i]);

409 close_slaves(avf);

410 return ret;

411 }

412

413 static int tee_write_trailer(AVFormatContext *avf)

414 {

415 TeeContext *tee = avf->priv_data;

416 AVFormatContext *avf2;

417 int ret_all = 0, ret;

418 unsigned i;

419

420 for (i = 0; i < tee->nb_slaves; i++) {

421 avf2 = tee->slaves[i].avf;

422 if ((ret = av_write_trailer(avf2)) < 0)

423 if (!ret_all)

424 ret_all = ret;

425 if (!(avf2->oformat->flags & AVFMT_NOFILE))

426 ff_format_io_close(avf2, &avf2->pb);

427 }

428 close_slaves(avf);

429 return ret_all;

430 }

431

432 static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)

433 {

434 TeeContext *tee = avf->priv_data;

435 AVFormatContext *avf2;

436 AVPacket pkt2;

437 int ret_all = 0, ret;

438 unsigned i, s;

439 int s2;

440 AVRational tb, tb2;

441

442 for (i = 0; i < tee->nb_slaves; i++) {

443 avf2 = tee->slaves[i].avf;

444 s = pkt->stream_index;

445 s2 = tee->slaves[i].stream_map[s];

446 if (s2 < 0)

447 continue;

448

449 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||

450 (ret = av_dup_packet(&pkt2))< 0)

451 if (!ret_all) {

452 ret_all = ret;

453 continue;

454 }

455 tb = avf ->streams[s ]->time_base;

456 tb2 = avf2->streams[s2]->time_base;

457 pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);

458 pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);

459 pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);

460 pkt2.stream_index = s2;

461

462 if ((ret = av_apply_bitstream_filters(avf2->streams[s2]->codec, &pkt2,

463 tee->slaves[i].bsfs[s2])) < 0 ||

464 (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)

465 if (!ret_all)

466 ret_all = ret;

467 }

468 return ret_all;

469 }

470

471 AVOutputFormat ff_tee_muxer = {

472 .name = "tee",

473 .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),

474 .priv_data_size = sizeof(TeeContext),

475 .write_header = tee_write_header,

476 .write_trailer = tee_write_trailer,

477 .write_packet = tee_write_packet,

478 .priv_class = &tee_muxer_class,

479 .flags = AVFMT_NOFILE,

480 };

NULL

#define NULL

Definition: coverity.c:32

val

const char const char void * val

Definition: avisynth_c.h:634

tee_write_packet

static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)

Definition: tee.c:432

const char * s

Definition: avisynth_c.h:631

av_interleaved_write_frame

int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)

Write a packet to an output media file ensuring correct interleaving.

Definition: mux.c:1016

AVDictionaryEntry

Definition: dict.h:86

TeeSlave::bsfs

AVBitStreamFilterContext ** bsfs

bitstream filters per stream

Definition: tee.c:34

slave_opt_delim

static const char *const slave_opt_delim

Definition: tee.c:50

AV_LOG_WARNING

#define AV_LOG_WARNING

Something somehow does not look correct.

Definition: log.h:182

LIBAVUTIL_VERSION_INT

#define LIBAVUTIL_VERSION_INT

Definition: version.h:70

tee_write_trailer

static int tee_write_trailer(AVFormatContext *avf)

Definition: tee.c:413

AVStream::sample_aspect_ratio

AVRational sample_aspect_ratio

sample aspect ratio (0 if unknown)

Definition: avformat.h:949

AVIO_FLAG_WRITE

#define AVIO_FLAG_WRITE

write-only

Definition: avio.h:538

slave_bsfs_spec_sep

static const char *const slave_bsfs_spec_sep

Definition: tee.c:51

avutil.h

external API header

log_slave

static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)

Definition: tee.c:340

av_dict_copy

int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)

Copy entries from one AVDictionary struct into another.

Definition: dict.c:213

avstring.h

pkt

static AVPacket pkt

Definition: demuxing_decoding.c:54

avcodec_copy_context

int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)

Copy the settings of the source AVCodecContext into the destination AVCodecContext.

Definition: options.c:182

slave_delim

static const char *const slave_delim

Definition: tee.c:47

AV_DICT_DONT_STRDUP_KEY

#define AV_DICT_DONT_STRDUP_KEY

Take ownership of a key that's been allocated with av_malloc() or another memory allocation function...

Definition: dict.h:75

slave_opt_close

static const char *const slave_opt_close

Definition: tee.c:49

AVFormatContext

Format I/O context.

Definition: avformat.h:1314

AVClass::class_name

const char * class_name

The name of the class; usually it is the same name as the context structure type to which the AVClass...

Definition: log.h:72

ff_tee_muxer

AVOutputFormat ff_tee_muxer

Definition: tee.c:471

AVOutputFormat::flags

int flags

can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT

Definition: avformat.h:542

opt.h

AVOptions.

end

static av_cold int end(AVCodecContext *avctx)

Definition: avrndec.c:90

AVPacket::duration

int64_t duration

Duration of this packet in AVStream->time_base units, 0 if unknown.

Definition: avcodec.h:1485

AVStream::id

int id

Format-specific stream ID.

Definition: avformat.h:884

ff_format_io_close

void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)

Definition: utils.c:4736

close_slaves

static void close_slaves(AVFormatContext *avf)

Definition: tee.c:314

avformat_match_stream_specifier

int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)

Check if the stream st contained in s is matched by the stream specifier spec.

Definition: utils.c:4363

avformat_new_stream

AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)

Add a new stream to a media file.

Definition: utils.c:3805

AVFormatContext::streams

AVStream ** streams

A list of all streams in the file.

Definition: avformat.h:1382

AVBitStreamFilter::name

const char * name

Definition: avcodec.h:5152

avio_internal.h

av_dict_get

AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)

Get a dictionary entry with matching key.

Definition: dict.c:39

AV_LOG_VERBOSE

#define AV_LOG_VERBOSE

Detailed information.

Definition: log.h:192

options

const OptionDef options[]

Definition: ffserver.c:3962

AVBitStreamFilterContext::next

struct AVBitStreamFilterContext * next

Definition: avcodec.h:5142

open_slave

static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)

Definition: tee.c:138

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:28

parse_slave_options

static int parse_slave_options(void *log, char *slave, AVDictionary **options, char **filename)

Definition: tee.c:60

slave_select_sep

static const char *const slave_select_sep

Definition: tee.c:52

AVFormatContext::oformat

struct AVOutputFormat * oformat

The output container format.

Definition: avformat.h:1333

avformat_alloc_output_context2

int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)

Allocate an AVFormatContext for an output format.

Definition: mux.c:148

av_rescale_q

int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)

Rescale a 64-bit integer by 2 rational numbers.

Definition: mathematics.c:142

AVDictionary

Definition: dict.c:29

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

AVFormatContext::metadata

AVDictionary * metadata

Metadata that applies to the whole file.

Definition: avformat.h:1528

#define s2

Definition: regdef.h:39

av_default_item_name

Definition: libopenh264enc.c:68

AVERROR

#define AVERROR(e)

Definition: error.h:43

NULL_IF_CONFIG_SMALL

#define NULL_IF_CONFIG_SMALL(x)

Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...

Definition: internal.h:176

av_dup_packet

attribute_deprecated int av_dup_packet(AVPacket *pkt)

Definition: avpacket.c:235

AV_LOG_DEBUG

#define AV_LOG_DEBUG

Stuff which is only useful for libav* developers.

Definition: log.h:197

TeeContext::nb_slaves

unsigned nb_slaves

Definition: tee.c:43

av_bitstream_filter_close

void av_bitstream_filter_close(AVBitStreamFilterContext *bsf)

Release bitstream filter context.

Definition: bitstream_filter.c:69

TeeSlave::stream_map

int * stream_map

map from input to output streams indexes, disabled output streams are set to -1

Definition: tee.c:38

av_dict_free

void av_dict_free(AVDictionary **pm)

Free all the memory allocated for an AVDictionary struct and all keys and values. ...

Definition: dict.c:199

internal.h

AVStream::avg_frame_rate

AVRational avg_frame_rate

Average framerate.

Definition: avformat.h:960

fail

#define fail()

Definition: checkasm.h:80

av_get_token

char * av_get_token(const char **buf, const char *term)

Unescape the given string until a non escaped terminating char, and return the token corresponding to...

Definition: avstring.c:149

AVFormatContext::opaque

void * opaque

User data.

Definition: avformat.h:1794

AVStream::codec

AVCodecContext * codec

Codec context associated with this stream.

Definition: avformat.h:896

AVFormatContext::nb_streams

unsigned int nb_streams

Number of elements in AVFormatContext.streams.

Definition: avformat.h:1370

TeeSlave

Definition: tee.c:32

AVFormatContext::filename

char filename[1024]

input or output filename

Definition: avformat.h:1390

avformat_write_header

av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)

Allocate the stream private data and write the stream header to an output media file.

Definition: mux.c:451

tee_muxer_class

static const AVClass tee_muxer_class

Definition: tee.c:54

AV_DICT_DONT_STRDUP_VAL

#define AV_DICT_DONT_STRDUP_VAL

Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...

Definition: dict.h:78

av_bitstream_filter_init

AVBitStreamFilterContext * av_bitstream_filter_init(const char *name)

Create and initialize a bitstream filter context given a bitstream filter name.

Definition: bitstream_filter.c:44

write_trailer

static int write_trailer(AVFormatContext *s1)

Definition: v4l2enc.c:94

AVOutputFormat::name

const char * name

Definition: avformat.h:523

av_err2str

#define av_err2str(errnum)

Convenience macro, the return value should be used only directly in function arguments but never stan...

Definition: error.h:119

AVStream::metadata

AVDictionary * metadata

Definition: avformat.h:951

TeeContext::slaves

TeeSlave slaves[MAX_SLAVES]

Definition: tee.c:44

avcodec_get_name

const char * avcodec_get_name(enum AVCodecID id)

Get the name of a codec.

Definition: utils.c:2648

AVBitStreamFilterContext

Definition: avcodec.h:5138

AVStream

Stream structure.

Definition: avformat.h:877

AVERROR_PATCHWELCOME

#define AVERROR_PATCHWELCOME

Not yet implemented in FFmpeg, patches welcome.

Definition: error.h:62

TeeContext

Definition: tee.c:41

AVCodecContext::codec_type

enum AVMediaType codec_type

Definition: avcodec.h:1540

AVCodecContext::codec_id

enum AVCodecID codec_id

Definition: avcodec.h:1549

av_strdup

char * av_strdup(const char *s)

Duplicate the string s.

Definition: mem.c:267

AVFormatContext::pb

AVIOContext * pb

I/O context.

Definition: avformat.h:1356

slave_opt_open

static const char *const slave_opt_open

Definition: tee.c:48

format

static const char * format

Definition: movenc-test.c:47

av_copy_packet

int av_copy_packet(AVPacket *dst, const AVPacket *src)

Copy packet, including contents.

Definition: avpacket.c:246

buf

void * buf

Definition: avisynth_c.h:553

av_apply_bitstream_filters

int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt, AVBitStreamFilterContext *bsfc)

Apply a list of bitstream filters to a packet.

Definition: utils.c:4687

av_dict_set

int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)

Set the given entry in *pm, overwriting an existing entry.

Definition: dict.c:69

AVBitStreamFilterContext::filter

struct AVBitStreamFilter * filter

Definition: avcodec.h:5140

AVClass

Describe the class of an AVClass context structure.

Definition: log.h:67

AVRational

rational number numerator/denominator

Definition: rational.h:43

parse_bsfs

static int parse_bsfs(void *log_ctx, const char *bsfs_spec, AVBitStreamFilterContext **bsfs)

Parse list of bitstream filters and add them to the list of filters pointed to by bsfs...

Definition: tee.c:105

avformat_free_context

void avformat_free_context(AVFormatContext *s)

Free an AVFormatContext and all its streams.

Definition: utils.c:3741

av_calloc

void * av_calloc(size_t nmemb, size_t size)

Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...

Definition: mem.c:260

av_get_media_type_string

const char * av_get_media_type_string(enum AVMediaType media_type)

Return a string describing the media_type enum, NULL if media_type is unknown.

Definition: utils.c:79

flags

static int flags

Definition: cpu.c:47

av_strtok

char * av_strtok(char *s, const char *delim, char **saveptr)

Split the string into several tokens which can be accessed by successive calls to av_strtok()...

Definition: avstring.c:184

AVStream::duration

int64_t duration

Decoding: duration of the stream, in stream time base.

Definition: avformat.h:936

avformat.h

Main libavformat public API header.

MAX_SLAVES

#define MAX_SLAVES

Definition: tee.c:30

if(ret< 0)

Definition: vf_mcdeint.c:282

AVFMT_NOFILE

#define AVFMT_NOFILE

Demuxer will use avio_open, no opened file should be provided by the caller.

Definition: avformat.h:477

AVStream::start_time

int64_t start_time

Decoding: pts of the first frame of the stream in presentation order, in stream time base...

Definition: avformat.h:929

AVStream::disposition

int disposition

AV_DISPOSITION_* bit field.

Definition: avformat.h:940

AVOutputFormat

Definition: avformat.h:522

AVStream::nb_frames

int64_t nb_frames

number of frames in this stream if known or 0

Definition: avformat.h:938

AVDictionaryEntry::key

char * key

Definition: dict.h:87

AVERROR_UNKNOWN

#define AVERROR_UNKNOWN

Unknown error, typically from an external library.

Definition: error.h:71

av_free

#define av_free(p)

Definition: tableprint_vlc.h:34

AVERROR_OPTION_NOT_FOUND

#define AVERROR_OPTION_NOT_FOUND

Option not found.

Definition: error.h:61

AVDictionaryEntry::value

char * value

Definition: dict.h:88

av_opt_get_key_value

int av_opt_get_key_value(const char **ropts, const char *key_val_sep, const char *pairs_sep, unsigned flags, char **rkey, char **rval)

Extract a key-value pair from the beginning of a string.

Definition: opt.c:1373

AVFormatContext::priv_data

void * priv_data

Format private data.

Definition: avformat.h:1342

write_header

static void write_header(FFV1Context *f)

Definition: ffv1enc.c:497

AVPacket::dts

int64_t dts

Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...

Definition: avcodec.h:1466

av_write_trailer

int av_write_trailer(AVFormatContext *s)

Write the stream trailer to an output media file and free the file private data.

Definition: mux.c:1083

av_freep

#define av_freep(p)

Definition: tableprint_vlc.h:35

AV_DICT_IGNORE_SUFFIX

#define AV_DICT_IGNORE_SUFFIX

Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.

Definition: dict.h:72

AVPacket::stream_index

int stream_index

Definition: avcodec.h:1469

AVStream::time_base

AVRational time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...

Definition: avformat.h:919

AVStream::r_frame_rate

AVRational r_frame_rate

Real base framerate of the stream.

Definition: avformat.h:1096

AVFormatContext::io_open

int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)

Definition: avformat.h:1872

AVPacket

This structure stores compressed data.

Definition: avcodec.h:1444

write_packet

static int write_packet(AVFormatContext *s1, AVPacket *pkt)

Definition: v4l2enc.c:86

TeeSlave::avf

AVFormatContext * avf

Definition: tee.c:33

AVFormatContext::io_close

void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)

A callback for closing the streams opened with AVFormatContext.io_open().

Definition: avformat.h:1878

AVPacket::pts

int64_t pts

Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...

Definition: avcodec.h:1460

tee_write_header

static int tee_write_header(AVFormatContext *avf)

Definition: tee.c:364

STEAL_OPTION

#define STEAL_OPTION(option, field)

#define tb

Definition: regdef.h:68

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