FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Tee pseudo-muxer
3			* Copyright (c) 2012 Nicolas George
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			*/
21
22
23			#include "libavutil/avutil.h"
24			#include "libavutil/avstring.h"
25			#include "libavutil/mem.h"
26			#include "libavutil/opt.h"
27			#include "libavcodec/bsf.h"
28			#include "internal.h"
29			#include "avformat.h"
30			#include "mux.h"
31			#include "tee_common.h"
32
33			typedef enum {
34			ON_SLAVE_FAILURE_ABORT = 1,
35			ON_SLAVE_FAILURE_IGNORE = 2
36			} SlaveFailurePolicy;
37
38			#define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
39
40			typedef struct {
41			AVFormatContext *avf;
42			AVBSFContext **bsfs; ///< bitstream filters per stream
43
44			SlaveFailurePolicy on_fail;
45			int use_fifo;
46			AVDictionary *fifo_options;
47
48			/** map from input to output streams indexes,
49			* disabled output streams are set to -1 */
50			int *stream_map;
51			int header_written;
52			} TeeSlave;
53
54			typedef struct TeeContext {
55			const AVClass *class;
56			unsigned nb_slaves;
57			unsigned nb_alive;
58			TeeSlave *slaves;
59			int use_fifo;
60			AVDictionary *fifo_options;
61			} TeeContext;
62
63			static const char *const slave_delim = "|";
64			static const char *const slave_bsfs_spec_sep = "/";
65			static const char *const slave_select_sep = ",";
66
67			#define OFFSET(x) offsetof(TeeContext, x)
68			static const AVOption tee_options[] = {
69			{"use_fifo", "Use fifo pseudo-muxer to separate actual muxers from encoder",
70			OFFSET(use_fifo), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
71			{"fifo_options", "fifo pseudo-muxer options", OFFSET(fifo_options),
72			AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM},
73			{NULL}
74			};
75
76			static const AVClass tee_muxer_class = {
77			.class_name = "Tee muxer",
78			.item_name = av_default_item_name,
79			.option = tee_options,
80			.version = LIBAVUTIL_VERSION_INT,
81			};
82
83		✗	static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
84			{
85		✗	if (!opt) {
86		✗	tee_slave->on_fail = DEFAULT_SLAVE_FAILURE_POLICY;
87		✗	return 0;
88		✗	} else if (!av_strcasecmp("abort", opt)) {
89		✗	tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
90		✗	return 0;
91		✗	} else if (!av_strcasecmp("ignore", opt)) {
92		✗	tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
93		✗	return 0;
94			}
95			/* Set failure behaviour to abort, so invalid option error will not be ignored */
96		✗	tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
97		✗	return AVERROR(EINVAL);
98			}
99
100		✗	static int parse_slave_fifo_policy(const char *use_fifo, TeeSlave *tee_slave)
101			{
102			/*TODO - change this to use proper function for parsing boolean
103			* options when there is one */
104		✗	if (av_match_name(use_fifo, "true,y,yes,enable,enabled,on,1")) {
105		✗	tee_slave->use_fifo = 1;
106		✗	} else if (av_match_name(use_fifo, "false,n,no,disable,disabled,off,0")) {
107		✗	tee_slave->use_fifo = 0;
108			} else {
109		✗	return AVERROR(EINVAL);
110			}
111		✗	return 0;
112			}
113
114		✗	static int parse_slave_fifo_options(const char *fifo_options, TeeSlave *tee_slave)
115			{
116		✗	return av_dict_parse_string(&tee_slave->fifo_options, fifo_options, "=", ":", 0);
117			}
118
119		✗	static int close_slave(TeeSlave *tee_slave)
120			{
121			AVFormatContext *avf;
122		✗	int ret = 0;
123
124		✗	av_dict_free(&tee_slave->fifo_options);
125		✗	avf = tee_slave->avf;
126		✗	if (!avf)
127		✗	return 0;
128
129		✗	if (tee_slave->header_written)
130		✗	ret = av_write_trailer(avf);
131
132		✗	if (tee_slave->bsfs) {
133		✗	for (unsigned i = 0; i < avf->nb_streams; ++i)
134		✗	av_bsf_free(&tee_slave->bsfs[i]);
135			}
136		✗	av_freep(&tee_slave->stream_map);
137		✗	av_freep(&tee_slave->bsfs);
138
139		✗	ff_format_io_close(avf, &avf->pb);
140		✗	avformat_free_context(avf);
141		✗	tee_slave->avf = NULL;
142		✗	return ret;
143			}
144
145		✗	static void close_slaves(AVFormatContext *avf)
146			{
147		✗	TeeContext *tee = avf->priv_data;
148
149		✗	for (unsigned i = 0; i < tee->nb_slaves; i++) {
150		✗	close_slave(&tee->slaves[i]);
151			}
152		✗	av_freep(&tee->slaves);
153		✗	}
154
155		✗	static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
156			{
157			int ret;
158		✗	AVDictionary *options = NULL, *bsf_options = NULL;
159			const AVDictionaryEntry *entry;
160			char *filename;
161		✗	char *format = NULL, *select = NULL;
162		✗	AVFormatContext *avf2 = NULL;
163			int stream_count;
164			int fullret;
165		✗	char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
166
167		✗	if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
168		✗	return ret;
169
170		✗	tee_slave->on_fail = DEFAULT_SLAVE_FAILURE_POLICY;
171
172			#define CONSUME_OPTION(option, field, action) do { \
173			AVDictionaryEntry *en = av_dict_get(options, option, NULL, 0); \
174			if (en) { \
175			field = en->value; \
176			{ action } \
177			av_dict_set(&options, option, NULL, 0); \
178			} \
179			} while (0)
180			#define STEAL_OPTION(option, field) \
181			CONSUME_OPTION(option, field, \
182			en->value = NULL; /* prevent it from being freed */)
183			#define PROCESS_OPTION(option, function, on_error) do { \
184			const char *value; \
185			CONSUME_OPTION(option, value, if ((ret = function) < 0) \
186			{ { on_error } goto end; }); \
187			} while (0)
188
189		✗	STEAL_OPTION("f", format);
190		✗	STEAL_OPTION("select", select);
191		✗	PROCESS_OPTION("onfail",
192			parse_slave_failure_policy_option(value, tee_slave),
193			av_log(avf, AV_LOG_ERROR, "Invalid onfail option value, "
194			"valid options are 'abort' and 'ignore'\n"););
195		✗	PROCESS_OPTION("use_fifo",
196			parse_slave_fifo_policy(value, tee_slave),
197			av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n",
198			av_err2str(ret)););
199		✗	PROCESS_OPTION("fifo_options",
200			parse_slave_fifo_options(value, tee_slave), ;);
201		✗	entry = NULL;
202		✗	while ((entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX))) {
203			/* trim out strlen("bsfs") characters from key */
204		✗	av_dict_set(&bsf_options, entry->key + 4, entry->value, 0);
205		✗	av_dict_set(&options, entry->key, NULL, 0);
206			}
207
208		✗	if (tee_slave->use_fifo) {
209
210		✗	if (options) {
211		✗	char *format_options_str = NULL;
212		✗	ret = av_dict_get_string(options, &format_options_str, '=', ':');
213		✗	if (ret < 0)
214		✗	goto end;
215
216		✗	ret = av_dict_set(&tee_slave->fifo_options, "format_opts", format_options_str,
217			AV_DICT_DONT_STRDUP_VAL);
218		✗	if (ret < 0)
219		✗	goto end;
220			}
221
222		✗	if (format) {
223		✗	ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
224			AV_DICT_DONT_STRDUP_VAL);
225		✗	format = NULL;
226		✗	if (ret < 0)
227		✗	goto end;
228			}
229
230		✗	av_dict_free(&options);
231		✗	options = tee_slave->fifo_options;
232		✗	tee_slave->fifo_options = NULL;
233			}
234		✗	ret = avformat_alloc_output_context2(&avf2, NULL,
235		✗	tee_slave->use_fifo ? "fifo" :format, filename);
236		✗	if (ret < 0)
237		✗	goto end;
238		✗	tee_slave->avf = avf2;
239		✗	av_dict_copy(&avf2->metadata, avf->metadata, 0);
240		✗	avf2->opaque = avf->opaque;
241		✗	avf2->io_open = avf->io_open;
242		✗	avf2->io_close2 = avf->io_close2;
243		✗	avf2->interrupt_callback = avf->interrupt_callback;
244		✗	avf2->flags = avf->flags;
245		✗	avf2->strict_std_compliance = avf->strict_std_compliance;
246
247		✗	tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
248		✗	if (!tee_slave->stream_map) {
249		✗	ret = AVERROR(ENOMEM);
250		✗	goto end;
251			}
252
253		✗	stream_count = 0;
254		✗	for (unsigned i = 0; i < avf->nb_streams; i++) {
255		✗	const AVStream *st = avf->streams[i];
256			AVStream *st2;
257		✗	if (select) {
258		✗	tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
259		✗	if (!tmp_select) {
260		✗	ret = AVERROR(ENOMEM);
261		✗	goto end;
262			}
263		✗	fullret = 0;
264		✗	first_subselect = tmp_select;
265		✗	next_subselect = NULL;
266		✗	while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
267		✗	first_subselect = NULL;
268
269		✗	ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
270		✗	if (ret < 0) {
271		✗	av_log(avf, AV_LOG_ERROR,
272			"Invalid stream specifier '%s' for output '%s'\n",
273			subselect, slave);
274		✗	goto end;
275			}
276		✗	if (ret != 0) {
277		✗	fullret = 1; // match
278		✗	break;
279			}
280			}
281		✗	av_freep(&tmp_select);
282
283		✗	if (fullret == 0) { /* no match */
284		✗	tee_slave->stream_map[i] = -1;
285		✗	continue;
286			}
287			}
288		✗	tee_slave->stream_map[i] = stream_count++;
289
290		✗	st2 = ff_stream_clone(avf2, st);
291		✗	if (!st2) {
292		✗	ret = AVERROR(ENOMEM);
293		✗	goto end;
294			}
295			}
296
297		✗	ret = ff_format_output_open(avf2, filename, &options);
298		✗	if (ret < 0) {
299		✗	av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
300		✗	av_err2str(ret));
301		✗	goto end;
302			}
303
304		✗	if ((ret = avformat_write_header(avf2, &options)) < 0) {
305		✗	av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
306		✗	slave, av_err2str(ret));
307		✗	goto end;
308			}
309		✗	tee_slave->header_written = 1;
310
311		✗	tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
312		✗	if (!tee_slave->bsfs) {
313		✗	ret = AVERROR(ENOMEM);
314		✗	goto end;
315			}
316
317		✗	entry = NULL;
318		✗	while (entry = av_dict_iterate(bsf_options, NULL)) {
319		✗	const char *spec = entry->key;
320		✗	if (*spec) {
321		✗	if (strspn(spec, slave_bsfs_spec_sep) != 1) {
322		✗	av_log(avf, AV_LOG_ERROR,
323			"Specifier separator in '%s' is '%c', but only characters '%s' "
324		✗	"are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
325		✗	ret = AVERROR(EINVAL);
326		✗	goto end;
327			}
328		✗	spec++; /* consume separator */
329			}
330
331		✗	for (unsigned i = 0; i < avf2->nb_streams; i++) {
332		✗	ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
333		✗	if (ret < 0) {
334		✗	av_log(avf, AV_LOG_ERROR,
335			"Invalid stream specifier '%s' in bsfs option '%s' for slave "
336		✗	"output '%s'\n", spec, entry->key, filename);
337		✗	goto end;
338			}
339
340		✗	if (ret > 0) {
341		✗	av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
342		✗	"output '%s'\n", spec, entry->value, i, filename);
343		✗	if (tee_slave->bsfs[i]) {
344		✗	av_log(avf, AV_LOG_WARNING,
345			"Duplicate bsfs specification associated to stream %d of slave "
346			"output '%s', filters will be ignored\n", i, filename);
347		✗	continue;
348			}
349		✗	ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
350		✗	if (ret < 0) {
351		✗	av_log(avf, AV_LOG_ERROR,
352			"Error parsing bitstream filter sequence '%s' associated to "
353		✗	"stream %d of slave output '%s'\n", entry->value, i, filename);
354		✗	goto end;
355			}
356			}
357			}
358
359		✗	av_dict_set(&bsf_options, entry->key, NULL, 0);
360			}
361
362		✗	for (unsigned i = 0; i < avf->nb_streams; i++){
363		✗	int target_stream = tee_slave->stream_map[i];
364		✗	if (target_stream < 0)
365		✗	continue;
366
367		✗	if (!tee_slave->bsfs[target_stream]) {
368			/* Add pass-through bitstream filter */
369		✗	ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
370		✗	if (ret < 0) {
371		✗	av_log(avf, AV_LOG_ERROR,
372			"Failed to create pass-through bitstream filter: %s\n",
373		✗	av_err2str(ret));
374		✗	goto end;
375			}
376			}
377
378		✗	tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
379		✗	ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
380		✗	avf->streams[i]->codecpar);
381		✗	if (ret < 0)
382		✗	goto end;
383
384		✗	ret = av_bsf_init(tee_slave->bsfs[target_stream]);
385		✗	if (ret < 0) {
386		✗	av_log(avf, AV_LOG_ERROR,
387			"Failed to initialize bitstream filter(s): %s\n",
388		✗	av_err2str(ret));
389		✗	goto end;
390			}
391			}
392
393		✗	if (options) {
394		✗	entry = NULL;
395		✗	while ((entry = av_dict_iterate(options, entry)))
396		✗	av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
397		✗	ret = AVERROR_OPTION_NOT_FOUND;
398		✗	goto end;
399			}
400
401		✗	end:
402		✗	av_free(format);
403		✗	av_free(select);
404		✗	av_dict_free(&options);
405		✗	av_dict_free(&bsf_options);
406		✗	av_freep(&tmp_select);
407		✗	return ret;
408			}
409
410		✗	static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
411			{
412		✗	av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
413		✗	slave->avf->url, slave->avf->oformat->name);
414		✗	for (unsigned i = 0; i < slave->avf->nb_streams; i++) {
415		✗	AVStream *st = slave->avf->streams[i];
416		✗	AVBSFContext *bsf = slave->bsfs[i];
417			const char *bsf_name;
418
419		✗	av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
420		✗	i, avcodec_get_name(st->codecpar->codec_id),
421		✗	av_get_media_type_string(st->codecpar->codec_type));
422
423		✗	bsf_name = bsf->filter->priv_class ?
424		✗	bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
425		✗	av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
426			}
427		✗	}
428
429		✗	static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
430			{
431		✗	TeeContext *tee = avf->priv_data;
432		✗	TeeSlave *tee_slave = &tee->slaves[slave_idx];
433
434		✗	tee->nb_alive--;
435
436		✗	close_slave(tee_slave);
437
438		✗	if (!tee->nb_alive) {
439		✗	av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
440		✗	return err_n;
441		✗	} else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
442		✗	av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
443		✗	return err_n;
444			} else {
445		✗	av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
446		✗	slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
447		✗	return 0;
448			}
449			}
450
451		✗	static int tee_write_header(AVFormatContext *avf)
452			{
453		✗	TeeContext *tee = avf->priv_data;
454		✗	unsigned nb_slaves = 0;
455		✗	const char *filename = avf->url;
456		✗	char **slaves = NULL;
457			int ret;
458
459		✗	while (*filename) {
460		✗	char *slave = av_get_token(&filename, slave_delim);
461		✗	if (!slave) {
462		✗	ret = AVERROR(ENOMEM);
463		✗	goto fail;
464			}
465		✗	ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
466		✗	if (ret < 0) {
467		✗	av_free(slave);
468		✗	goto fail;
469			}
470		✗	if (strspn(filename, slave_delim))
471		✗	filename++;
472			}
473
474		✗	if (!FF_ALLOCZ_TYPED_ARRAY(tee->slaves, nb_slaves)) {
475		✗	ret = AVERROR(ENOMEM);
476		✗	goto fail;
477			}
478		✗	tee->nb_slaves = tee->nb_alive = nb_slaves;
479
480		✗	for (unsigned i = 0; i < nb_slaves; i++) {
481
482		✗	tee->slaves[i].use_fifo = tee->use_fifo;
483		✗	ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
484		✗	if (ret < 0)
485		✗	goto fail;
486
487		✗	if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
488		✗	ret = tee_process_slave_failure(avf, i, ret);
489		✗	if (ret < 0)
490		✗	goto fail;
491			} else {
492		✗	log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
493			}
494		✗	av_freep(&slaves[i]);
495			}
496
497		✗	for (unsigned i = 0; i < avf->nb_streams; i++) {
498		✗	int mapped = 0;
499		✗	for (unsigned j = 0; j < tee->nb_slaves; j++)
500		✗	if (tee->slaves[j].avf)
501		✗	mapped += tee->slaves[j].stream_map[i] >= 0;
502		✗	if (!mapped)
503		✗	av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
504			"to any slave.\n", i);
505			}
506		✗	av_free(slaves);
507		✗	return 0;
508
509		✗	fail:
510		✗	for (unsigned i = 0; i < nb_slaves; i++)
511		✗	av_freep(&slaves[i]);
512		✗	close_slaves(avf);
513		✗	av_free(slaves);
514		✗	return ret;
515			}
516
517		✗	static int tee_write_trailer(AVFormatContext *avf)
518			{
519		✗	TeeContext *tee = avf->priv_data;
520		✗	int ret_all = 0, ret;
521
522		✗	for (unsigned i = 0; i < tee->nb_slaves; i++) {
523		✗	if ((ret = close_slave(&tee->slaves[i])) < 0) {
524		✗	ret = tee_process_slave_failure(avf, i, ret);
525		✗	if (!ret_all && ret < 0)
526		✗	ret_all = ret;
527			}
528			}
529		✗	av_freep(&tee->slaves);
530		✗	return ret_all;
531			}
532
533		✗	static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
534			{
535		✗	TeeContext *tee = avf->priv_data;
536		✗	AVPacket *const pkt2 = ffformatcontext(avf)->pkt;
537		✗	int ret_all = 0, ret;
538			unsigned s;
539			int s2;
540
541		✗	for (unsigned i = 0; i < tee->nb_slaves; i++) {
542		✗	AVFormatContext *avf2 = tee->slaves[i].avf;
543			AVBSFContext *bsfs;
544
545		✗	if (!avf2)
546		✗	continue;
547
548			/* Flush slave if pkt is NULL*/
549		✗	if (!pkt) {
550		✗	ret = av_interleaved_write_frame(avf2, NULL);
551		✗	if (ret < 0) {
552		✗	ret = tee_process_slave_failure(avf, i, ret);
553		✗	if (!ret_all && ret < 0)
554		✗	ret_all = ret;
555			}
556		✗	continue;
557			}
558
559		✗	s = pkt->stream_index;
560		✗	s2 = tee->slaves[i].stream_map[s];
561		✗	if (s2 < 0)
562		✗	continue;
563
564		✗	if ((ret = av_packet_ref(pkt2, pkt)) < 0) {
565		✗	if (!ret_all)
566		✗	ret_all = ret;
567		✗	continue;
568			}
569		✗	bsfs = tee->slaves[i].bsfs[s2];
570		✗	pkt2->stream_index = s2;
571
572		✗	ret = av_bsf_send_packet(bsfs, pkt2);
573		✗	if (ret < 0) {
574		✗	av_packet_unref(pkt2);
575		✗	av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
576		✗	av_err2str(ret));
577		✗	ret = tee_process_slave_failure(avf, i, ret);
578		✗	if (!ret_all && ret < 0)
579		✗	ret_all = ret;
580			}
581
582			while(1) {
583		✗	ret = av_bsf_receive_packet(bsfs, pkt2);
584		✗	if (ret == AVERROR(EAGAIN)) {
585		✗	ret = 0;
586		✗	break;
587		✗	} else if (ret < 0) {
588		✗	break;
589			}
590
591		✗	av_packet_rescale_ts(pkt2, bsfs->time_base_out,
592		✗	avf2->streams[s2]->time_base);
593		✗	ret = av_interleaved_write_frame(avf2, pkt2);
594		✗	if (ret < 0)
595		✗	break;
596			};
597
598		✗	if (ret < 0) {
599		✗	ret = tee_process_slave_failure(avf, i, ret);
600		✗	if (!ret_all && ret < 0)
601		✗	ret_all = ret;
602			}
603			}
604		✗	return ret_all;
605			}
606
607			const FFOutputFormat ff_tee_muxer = {
608			.p.name = "tee",
609			.p.long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
610			.priv_data_size = sizeof(TeeContext),
611			.write_header = tee_write_header,
612			.write_trailer = tee_write_trailer,
613			.write_packet = tee_write_packet,
614			.p.priv_class = &tee_muxer_class,
615			.p.flags = AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
616			.flags_internal = FF_OFMT_FLAG_ALLOW_FLUSH,
617			};
618