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 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 = 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			unsigned i;
123		✗	int ret = 0;
124
125		✗	av_dict_free(&tee_slave->fifo_options);
126		✗	avf = tee_slave->avf;
127		✗	if (!avf)
128		✗	return 0;
129
130		✗	if (tee_slave->header_written)
131		✗	ret = av_write_trailer(avf);
132
133		✗	if (tee_slave->bsfs) {
134		✗	for (i = 0; i < avf->nb_streams; ++i)
135		✗	av_bsf_free(&tee_slave->bsfs[i]);
136			}
137		✗	av_freep(&tee_slave->stream_map);
138		✗	av_freep(&tee_slave->bsfs);
139
140		✗	ff_format_io_close(avf, &avf->pb);
141		✗	avformat_free_context(avf);
142		✗	tee_slave->avf = NULL;
143		✗	return ret;
144			}
145
146		✗	static void close_slaves(AVFormatContext *avf)
147			{
148		✗	TeeContext *tee = avf->priv_data;
149			unsigned i;
150
151		✗	for (i = 0; i < tee->nb_slaves; i++) {
152		✗	close_slave(&tee->slaves[i]);
153			}
154		✗	av_freep(&tee->slaves);
155		✗	}
156
157		✗	static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
158			{
159			int i, ret;
160		✗	AVDictionary *options = NULL, *bsf_options = NULL;
161			AVDictionaryEntry *entry;
162			char *filename;
163		✗	char *format = NULL, *select = NULL, *on_fail = NULL;
164		✗	char *use_fifo = NULL, *fifo_options_str = NULL;
165		✗	AVFormatContext *avf2 = NULL;
166			AVStream *st, *st2;
167			int stream_count;
168			int fullret;
169		✗	char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
170
171		✗	if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
172		✗	return ret;
173
174			#define CONSUME_OPTION(option, field, action) do { \
175			if ((entry = av_dict_get(options, option, NULL, 0))) { \
176			field = entry->value; \
177			{ action } \
178			av_dict_set(&options, option, NULL, 0); \
179			} \
180			} while (0)
181			#define STEAL_OPTION(option, field) \
182			CONSUME_OPTION(option, field, \
183			entry->value = NULL; /* prevent it from being freed */)
184			#define PROCESS_OPTION(option, field, function, on_error) \
185			CONSUME_OPTION(option, field, if ((ret = function) < 0) { { on_error } goto end; })
186
187		✗	STEAL_OPTION("f", format);
188		✗	STEAL_OPTION("select", select);
189		✗	PROCESS_OPTION("onfail", on_fail,
190			parse_slave_failure_policy_option(on_fail, tee_slave),
191			av_log(avf, AV_LOG_ERROR, "Invalid onfail option value, "
192			"valid options are 'abort' and 'ignore'\n"););
193		✗	PROCESS_OPTION("use_fifo", use_fifo,
194			parse_slave_fifo_policy(use_fifo, tee_slave),
195			av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n",
196			av_err2str(ret)););
197		✗	PROCESS_OPTION("fifo_options", fifo_options_str,
198			parse_slave_fifo_options(fifo_options_str, tee_slave), ;);
199		✗	entry = NULL;
200		✗	while ((entry = av_dict_get(options, "bsfs", entry, AV_DICT_IGNORE_SUFFIX))) {
201			/* trim out strlen("bsfs") characters from key */
202		✗	av_dict_set(&bsf_options, entry->key + 4, entry->value, 0);
203		✗	av_dict_set(&options, entry->key, NULL, 0);
204			}
205
206		✗	if (tee_slave->use_fifo) {
207
208		✗	if (options) {
209		✗	char *format_options_str = NULL;
210		✗	ret = av_dict_get_string(options, &format_options_str, '=', ':');
211		✗	if (ret < 0)
212		✗	goto end;
213
214		✗	ret = av_dict_set(&tee_slave->fifo_options, "format_opts", format_options_str,
215			AV_DICT_DONT_STRDUP_VAL);
216		✗	if (ret < 0)
217		✗	goto end;
218			}
219
220		✗	if (format) {
221		✗	ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
222			AV_DICT_DONT_STRDUP_VAL);
223		✗	format = NULL;
224		✗	if (ret < 0)
225		✗	goto end;
226			}
227
228		✗	av_dict_free(&options);
229		✗	options = tee_slave->fifo_options;
230		✗	tee_slave->fifo_options = NULL;
231			}
232		✗	ret = avformat_alloc_output_context2(&avf2, NULL,
233		✗	tee_slave->use_fifo ? "fifo" :format, filename);
234		✗	if (ret < 0)
235		✗	goto end;
236		✗	tee_slave->avf = avf2;
237		✗	av_dict_copy(&avf2->metadata, avf->metadata, 0);
238		✗	avf2->opaque = avf->opaque;
239		✗	avf2->io_open = avf->io_open;
240		✗	avf2->io_close2 = avf->io_close2;
241		✗	avf2->interrupt_callback = avf->interrupt_callback;
242		✗	avf2->flags = avf->flags;
243		✗	avf2->strict_std_compliance = avf->strict_std_compliance;
244
245		✗	tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
246		✗	if (!tee_slave->stream_map) {
247		✗	ret = AVERROR(ENOMEM);
248		✗	goto end;
249			}
250
251		✗	stream_count = 0;
252		✗	for (i = 0; i < avf->nb_streams; i++) {
253		✗	st = avf->streams[i];
254		✗	if (select) {
255		✗	tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
256		✗	if (!tmp_select) {
257		✗	ret = AVERROR(ENOMEM);
258		✗	goto end;
259			}
260		✗	fullret = 0;
261		✗	first_subselect = tmp_select;
262		✗	next_subselect = NULL;
263		✗	while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
264		✗	first_subselect = NULL;
265
266		✗	ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
267		✗	if (ret < 0) {
268		✗	av_log(avf, AV_LOG_ERROR,
269			"Invalid stream specifier '%s' for output '%s'\n",
270			subselect, slave);
271		✗	goto end;
272			}
273		✗	if (ret != 0) {
274		✗	fullret = 1; // match
275		✗	break;
276			}
277			}
278		✗	av_freep(&tmp_select);
279
280		✗	if (fullret == 0) { /* no match */
281		✗	tee_slave->stream_map[i] = -1;
282		✗	continue;
283			}
284			}
285		✗	tee_slave->stream_map[i] = stream_count++;
286
287		✗	st2 = ff_stream_clone(avf2, st);
288		✗	if (!st2) {
289		✗	ret = AVERROR(ENOMEM);
290		✗	goto end;
291			}
292			}
293
294		✗	ret = ff_format_output_open(avf2, filename, &options);
295		✗	if (ret < 0) {
296		✗	av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
297		✗	av_err2str(ret));
298		✗	goto end;
299			}
300
301		✗	if ((ret = avformat_write_header(avf2, &options)) < 0) {
302		✗	av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
303		✗	slave, av_err2str(ret));
304		✗	goto end;
305			}
306		✗	tee_slave->header_written = 1;
307
308		✗	tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
309		✗	if (!tee_slave->bsfs) {
310		✗	ret = AVERROR(ENOMEM);
311		✗	goto end;
312			}
313
314		✗	entry = NULL;
315		✗	while (entry = av_dict_get(bsf_options, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
316		✗	const char *spec = entry->key;
317		✗	if (*spec) {
318		✗	if (strspn(spec, slave_bsfs_spec_sep) != 1) {
319		✗	av_log(avf, AV_LOG_ERROR,
320			"Specifier separator in '%s' is '%c', but only characters '%s' "
321		✗	"are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
322		✗	ret = AVERROR(EINVAL);
323		✗	goto end;
324			}
325		✗	spec++; /* consume separator */
326			}
327
328		✗	for (i = 0; i < avf2->nb_streams; i++) {
329		✗	ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
330		✗	if (ret < 0) {
331		✗	av_log(avf, AV_LOG_ERROR,
332			"Invalid stream specifier '%s' in bsfs option '%s' for slave "
333			"output '%s'\n", spec, entry->key, filename);
334		✗	goto end;
335			}
336
337		✗	if (ret > 0) {
338		✗	av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
339			"output '%s'\n", spec, entry->value, i, filename);
340		✗	if (tee_slave->bsfs[i]) {
341		✗	av_log(avf, AV_LOG_WARNING,
342			"Duplicate bsfs specification associated to stream %d of slave "
343			"output '%s', filters will be ignored\n", i, filename);
344		✗	continue;
345			}
346		✗	ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
347		✗	if (ret < 0) {
348		✗	av_log(avf, AV_LOG_ERROR,
349			"Error parsing bitstream filter sequence '%s' associated to "
350			"stream %d of slave output '%s'\n", entry->value, i, filename);
351		✗	goto end;
352			}
353			}
354			}
355
356		✗	av_dict_set(&bsf_options, entry->key, NULL, 0);
357			}
358
359		✗	for (i = 0; i < avf->nb_streams; i++){
360		✗	int target_stream = tee_slave->stream_map[i];
361		✗	if (target_stream < 0)
362		✗	continue;
363
364		✗	if (!tee_slave->bsfs[target_stream]) {
365			/* Add pass-through bitstream filter */
366		✗	ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
367		✗	if (ret < 0) {
368		✗	av_log(avf, AV_LOG_ERROR,
369			"Failed to create pass-through bitstream filter: %s\n",
370		✗	av_err2str(ret));
371		✗	goto end;
372			}
373			}
374
375		✗	tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
376		✗	ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
377		✗	avf->streams[i]->codecpar);
378		✗	if (ret < 0)
379		✗	goto end;
380
381		✗	ret = av_bsf_init(tee_slave->bsfs[target_stream]);
382		✗	if (ret < 0) {
383		✗	av_log(avf, AV_LOG_ERROR,
384			"Failed to initialize bitstream filter(s): %s\n",
385		✗	av_err2str(ret));
386		✗	goto end;
387			}
388			}
389
390		✗	if (options) {
391		✗	entry = NULL;
392		✗	while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
393		✗	av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
394		✗	ret = AVERROR_OPTION_NOT_FOUND;
395		✗	goto end;
396			}
397
398		✗	end:
399		✗	av_free(format);
400		✗	av_free(select);
401		✗	av_dict_free(&options);
402		✗	av_dict_free(&bsf_options);
403		✗	av_freep(&tmp_select);
404		✗	return ret;
405			}
406
407		✗	static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
408			{
409			int i;
410		✗	av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
411		✗	slave->avf->url, slave->avf->oformat->name);
412		✗	for (i = 0; i < slave->avf->nb_streams; i++) {
413		✗	AVStream *st = slave->avf->streams[i];
414		✗	AVBSFContext *bsf = slave->bsfs[i];
415			const char *bsf_name;
416
417		✗	av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
418		✗	i, avcodec_get_name(st->codecpar->codec_id),
419		✗	av_get_media_type_string(st->codecpar->codec_type));
420
421		✗	bsf_name = bsf->filter->priv_class ?
422		✗	bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
423		✗	av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
424			}
425		✗	}
426
427		✗	static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
428			{
429		✗	TeeContext *tee = avf->priv_data;
430		✗	TeeSlave *tee_slave = &tee->slaves[slave_idx];
431
432		✗	tee->nb_alive--;
433
434		✗	close_slave(tee_slave);
435
436		✗	if (!tee->nb_alive) {
437		✗	av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
438		✗	return err_n;
439		✗	} else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
440		✗	av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
441		✗	return err_n;
442			} else {
443		✗	av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
444		✗	slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
445		✗	return 0;
446			}
447			}
448
449		✗	static int tee_write_header(AVFormatContext *avf)
450			{
451		✗	TeeContext *tee = avf->priv_data;
452		✗	unsigned nb_slaves = 0, i;
453		✗	const char *filename = avf->url;
454		✗	char **slaves = NULL;
455			int ret;
456
457		✗	while (*filename) {
458		✗	char *slave = av_get_token(&filename, slave_delim);
459		✗	if (!slave) {
460		✗	ret = AVERROR(ENOMEM);
461		✗	goto fail;
462			}
463		✗	ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
464		✗	if (ret < 0) {
465		✗	av_free(slave);
466		✗	goto fail;
467			}
468		✗	if (strspn(filename, slave_delim))
469		✗	filename++;
470			}
471
472		✗	if (!FF_ALLOCZ_TYPED_ARRAY(tee->slaves, nb_slaves)) {
473		✗	ret = AVERROR(ENOMEM);
474		✗	goto fail;
475			}
476		✗	tee->nb_slaves = tee->nb_alive = nb_slaves;
477
478		✗	for (i = 0; i < nb_slaves; i++) {
479
480		✗	tee->slaves[i].use_fifo = tee->use_fifo;
481		✗	ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
482		✗	if (ret < 0)
483		✗	goto fail;
484
485		✗	if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
486		✗	ret = tee_process_slave_failure(avf, i, ret);
487		✗	if (ret < 0)
488		✗	goto fail;
489			} else {
490		✗	log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
491			}
492		✗	av_freep(&slaves[i]);
493			}
494
495		✗	for (i = 0; i < avf->nb_streams; i++) {
496		✗	int j, mapped = 0;
497		✗	for (j = 0; j < tee->nb_slaves; j++)
498		✗	if (tee->slaves[j].avf)
499		✗	mapped += tee->slaves[j].stream_map[i] >= 0;
500		✗	if (!mapped)
501		✗	av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
502			"to any slave.\n", i);
503			}
504		✗	av_free(slaves);
505		✗	return 0;
506
507		✗	fail:
508		✗	for (i = 0; i < nb_slaves; i++)
509		✗	av_freep(&slaves[i]);
510		✗	close_slaves(avf);
511		✗	av_free(slaves);
512		✗	return ret;
513			}
514
515		✗	static int tee_write_trailer(AVFormatContext *avf)
516			{
517		✗	TeeContext *tee = avf->priv_data;
518		✗	int ret_all = 0, ret;
519			unsigned i;
520
521		✗	for (i = 0; i < tee->nb_slaves; i++) {
522		✗	if ((ret = close_slave(&tee->slaves[i])) < 0) {
523		✗	ret = tee_process_slave_failure(avf, i, ret);
524		✗	if (!ret_all && ret < 0)
525		✗	ret_all = ret;
526			}
527			}
528		✗	av_freep(&tee->slaves);
529		✗	return ret_all;
530			}
531
532		✗	static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
533			{
534		✗	TeeContext *tee = avf->priv_data;
535			AVFormatContext *avf2;
536			AVBSFContext *bsfs;
537		✗	AVPacket *const pkt2 = ffformatcontext(avf)->pkt;
538		✗	int ret_all = 0, ret;
539			unsigned i, s;
540			int s2;
541
542		✗	for (i = 0; i < tee->nb_slaves; i++) {
543		✗	if (!(avf2 = tee->slaves[i].avf))
544		✗	continue;
545
546			/* Flush slave if pkt is NULL*/
547		✗	if (!pkt) {
548		✗	ret = av_interleaved_write_frame(avf2, NULL);
549		✗	if (ret < 0) {
550		✗	ret = tee_process_slave_failure(avf, i, ret);
551		✗	if (!ret_all && ret < 0)
552		✗	ret_all = ret;
553			}
554		✗	continue;
555			}
556
557		✗	s = pkt->stream_index;
558		✗	s2 = tee->slaves[i].stream_map[s];
559		✗	if (s2 < 0)
560		✗	continue;
561
562		✗	if ((ret = av_packet_ref(pkt2, pkt)) < 0) {
563		✗	if (!ret_all)
564		✗	ret_all = ret;
565		✗	continue;
566			}
567		✗	bsfs = tee->slaves[i].bsfs[s2];
568		✗	pkt2->stream_index = s2;
569
570		✗	ret = av_bsf_send_packet(bsfs, pkt2);
571		✗	if (ret < 0) {
572		✗	av_packet_unref(pkt2);
573		✗	av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
574		✗	av_err2str(ret));
575		✗	ret = tee_process_slave_failure(avf, i, ret);
576		✗	if (!ret_all && ret < 0)
577		✗	ret_all = ret;
578			}
579
580			while(1) {
581		✗	ret = av_bsf_receive_packet(bsfs, pkt2);
582		✗	if (ret == AVERROR(EAGAIN)) {
583		✗	ret = 0;
584		✗	break;
585		✗	} else if (ret < 0) {
586		✗	break;
587			}
588
589		✗	av_packet_rescale_ts(pkt2, bsfs->time_base_out,
590		✗	avf2->streams[s2]->time_base);
591		✗	ret = av_interleaved_write_frame(avf2, pkt2);
592		✗	if (ret < 0)
593		✗	break;
594			};
595
596		✗	if (ret < 0) {
597		✗	ret = tee_process_slave_failure(avf, i, ret);
598		✗	if (!ret_all && ret < 0)
599		✗	ret_all = ret;
600			}
601			}
602		✗	return ret_all;
603			}
604
605			const FFOutputFormat ff_tee_muxer = {
606			.p.name = "tee",
607			.p.long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
608			.priv_data_size = sizeof(TeeContext),
609			.write_header = tee_write_header,
610			.write_trailer = tee_write_trailer,
611			.write_packet = tee_write_packet,
612			.p.priv_class = &tee_muxer_class,
613			#if FF_API_ALLOW_FLUSH
614			.p.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH | AVFMT_TS_NEGATIVE,
615			#else
616			.p.flags = AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
617			#endif
618			.flags_internal = FF_OFMT_FLAG_ALLOW_FLUSH,
619			};
620