FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Live HDS fragmenter
3			* Copyright (c) 2013 Martin Storsjo
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 "config.h"
23			#if HAVE_UNISTD_H
24			#include <unistd.h>
25			#endif
26
27			#include "avformat.h"
28			#include "internal.h"
29			#include "mux.h"
30			#include "os_support.h"
31
32			#include "libavutil/avstring.h"
33			#include "libavutil/base64.h"
34			#include "libavutil/intreadwrite.h"
35			#include "libavutil/mathematics.h"
36			#include "libavutil/mem.h"
37			#include "libavutil/opt.h"
38
39			typedef struct Fragment {
40			char file[1024];
41			int64_t start_time, duration;
42			int n;
43			} Fragment;
44
45			typedef struct OutputStream {
46			int bitrate;
47			int first_stream;
48			AVFormatContext *ctx;
49			int ctx_inited;
50			uint8_t iobuf[32768];
51			char temp_filename[1024];
52			int64_t frag_start_ts, last_ts;
53			AVIOContext *out;
54			int packets_written;
55			int nb_fragments, fragments_size, fragment_index;
56			Fragment **fragments;
57
58			int has_audio, has_video;
59
60			uint8_t *metadata;
61			int metadata_size;
62
63			uint8_t *extra_packets[2];
64			int extra_packet_sizes[2];
65			int nb_extra_packets;
66			} OutputStream;
67
68			typedef struct HDSContext {
69			const AVClass *class; /* Class for private options. */
70			int window_size;
71			int extra_window_size;
72			int min_frag_duration;
73			int remove_at_exit;
74
75			OutputStream *streams;
76			int nb_streams;
77			} HDSContext;
78
79		✗	static int parse_header(OutputStream *os, const uint8_t *buf, int buf_size)
80			{
81		✗	if (buf_size < 13)
82		✗	return AVERROR_INVALIDDATA;
83		✗	if (memcmp(buf, "FLV", 3))
84		✗	return AVERROR_INVALIDDATA;
85		✗	buf += 13;
86		✗	buf_size -= 13;
87		✗	while (buf_size >= 11 + 4) {
88		✗	int type = buf[0];
89		✗	int size = AV_RB24(&buf[1]) + 11 + 4;
90		✗	if (size > buf_size)
91		✗	return AVERROR_INVALIDDATA;
92		✗	if (type == 8 || type == 9) {
93		✗	if (os->nb_extra_packets >= FF_ARRAY_ELEMS(os->extra_packets))
94		✗	return AVERROR_INVALIDDATA;
95		✗	os->extra_packet_sizes[os->nb_extra_packets] = size;
96		✗	os->extra_packets[os->nb_extra_packets] = av_memdup(buf, size);
97		✗	if (!os->extra_packets[os->nb_extra_packets])
98		✗	return AVERROR(ENOMEM);
99		✗	os->nb_extra_packets++;
100		✗	} else if (type == 0x12) {
101		✗	if (os->metadata)
102		✗	return AVERROR_INVALIDDATA;
103		✗	os->metadata_size = size - 11 - 4;
104		✗	os->metadata = av_memdup(buf + 11, os->metadata_size);
105		✗	if (!os->metadata)
106		✗	return AVERROR(ENOMEM);
107			}
108		✗	buf += size;
109		✗	buf_size -= size;
110			}
111		✗	if (!os->metadata)
112		✗	return AVERROR_INVALIDDATA;
113		✗	return 0;
114			}
115
116		✗	static int hds_write(void *opaque, const uint8_t *buf, int buf_size)
117			{
118		✗	OutputStream *os = opaque;
119		✗	if (os->out) {
120		✗	avio_write(os->out, buf, buf_size);
121			} else {
122		✗	if (!os->metadata_size) {
123			int ret;
124			// Assuming the IO buffer is large enough to fit the
125			// FLV header and all metadata and extradata packets
126		✗	if ((ret = parse_header(os, buf, buf_size)) < 0)
127		✗	return ret;
128			}
129			}
130		✗	return buf_size;
131			}
132
133		✗	static void hds_free(AVFormatContext *s)
134			{
135		✗	HDSContext *c = s->priv_data;
136			int i, j;
137		✗	if (!c->streams)
138		✗	return;
139		✗	for (i = 0; i < s->nb_streams; i++) {
140		✗	OutputStream *os = &c->streams[i];
141		✗	if (os->out)
142		✗	ff_format_io_close(s, &os->out);
143		✗	if (os->ctx && os->ctx_inited)
144		✗	av_write_trailer(os->ctx);
145		✗	if (os->ctx)
146		✗	avio_context_free(&os->ctx->pb);
147		✗	avformat_free_context(os->ctx);
148		✗	av_freep(&os->metadata);
149		✗	for (j = 0; j < os->nb_extra_packets; j++)
150		✗	av_freep(&os->extra_packets[j]);
151		✗	for (j = 0; j < os->nb_fragments; j++)
152		✗	av_freep(&os->fragments[j]);
153		✗	av_freep(&os->fragments);
154			}
155		✗	av_freep(&c->streams);
156			}
157
158		✗	static int write_manifest(AVFormatContext *s, int final)
159			{
160		✗	HDSContext *c = s->priv_data;
161			AVIOContext *out;
162			char filename[1024], temp_filename[1024];
163			int ret, i;
164		✗	double duration = 0;
165
166		✗	if (c->nb_streams > 0)
167		✗	duration = c->streams[0].last_ts * av_q2d(s->streams[0]->time_base);
168
169		✗	snprintf(filename, sizeof(filename), "%s/index.f4m", s->url);
170		✗	snprintf(temp_filename, sizeof(temp_filename), "%s/index.f4m.tmp", s->url);
171		✗	ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
172		✗	if (ret < 0) {
173		✗	av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
174		✗	return ret;
175			}
176		✗	avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
177		✗	avio_printf(out, "<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n");
178		✗	avio_printf(out, "\t<id>%s</id>\n", av_basename(s->url));
179		✗	avio_printf(out, "\t<streamType>%s</streamType>\n",
180			final ? "recorded" : "live");
181		✗	avio_printf(out, "\t<deliveryType>streaming</deliveryType>\n");
182		✗	if (final)
183		✗	avio_printf(out, "\t<duration>%f</duration>\n", duration);
184		✗	for (i = 0; i < c->nb_streams; i++) {
185		✗	OutputStream *os = &c->streams[i];
186		✗	int b64_size = AV_BASE64_SIZE(os->metadata_size);
187		✗	char *base64 = av_malloc(b64_size);
188		✗	if (!base64) {
189		✗	ff_format_io_close(s, &out);
190		✗	return AVERROR(ENOMEM);
191			}
192		✗	av_base64_encode(base64, b64_size, os->metadata, os->metadata_size);
193
194		✗	avio_printf(out, "\t<bootstrapInfo profile=\"named\" url=\"stream%d.abst\" id=\"bootstrap%d\" />\n", i, i);
195		✗	avio_printf(out, "\t<media bitrate=\"%d\" url=\"stream%d\" bootstrapInfoId=\"bootstrap%d\">\n", os->bitrate/1000, i, i);
196		✗	avio_printf(out, "\t\t<metadata>%s</metadata>\n", base64);
197		✗	avio_printf(out, "\t</media>\n");
198		✗	av_free(base64);
199			}
200		✗	avio_printf(out, "</manifest>\n");
201		✗	avio_flush(out);
202		✗	ff_format_io_close(s, &out);
203		✗	return ff_rename(temp_filename, filename, s);
204			}
205
206		✗	static void update_size(AVIOContext *out, int64_t pos)
207			{
208		✗	int64_t end = avio_tell(out);
209		✗	avio_seek(out, pos, SEEK_SET);
210		✗	avio_wb32(out, end - pos);
211		✗	avio_seek(out, end, SEEK_SET);
212		✗	}
213
214			/* Note, the .abst files need to be served with the "binary/octet"
215			* mime type, otherwise at least the OSMF player can easily fail
216			* with "stream not found" when polling for the next fragment. */
217		✗	static int write_abst(AVFormatContext *s, OutputStream *os, int final)
218			{
219		✗	HDSContext *c = s->priv_data;
220			AVIOContext *out;
221			char filename[1024], temp_filename[1024];
222			int i, ret;
223			int64_t asrt_pos, afrt_pos;
224		✗	int start = 0, fragments;
225		✗	int index = s->streams[os->first_stream]->id;
226		✗	int64_t cur_media_time = 0;
227		✗	if (c->window_size)
228		✗	start = FFMAX(os->nb_fragments - c->window_size, 0);
229		✗	fragments = os->nb_fragments - start;
230		✗	if (final)
231		✗	cur_media_time = os->last_ts;
232		✗	else if (os->nb_fragments)
233		✗	cur_media_time = os->fragments[os->nb_fragments - 1]->start_time;
234
235		✗	snprintf(filename, sizeof(filename),
236			"%s/stream%d.abst", s->url, index);
237		✗	snprintf(temp_filename, sizeof(temp_filename),
238			"%s/stream%d.abst.tmp", s->url, index);
239		✗	ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
240		✗	if (ret < 0) {
241		✗	av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
242		✗	return ret;
243			}
244		✗	avio_wb32(out, 0); // abst size
245		✗	avio_wl32(out, MKTAG('a','b','s','t'));
246		✗	avio_wb32(out, 0); // version + flags
247		✗	avio_wb32(out, os->fragment_index - 1); // BootstrapinfoVersion
248		✗	avio_w8(out, final ? 0 : 0x20); // profile, live, update
249		✗	avio_wb32(out, 1000); // timescale
250		✗	avio_wb64(out, cur_media_time);
251		✗	avio_wb64(out, 0); // SmpteTimeCodeOffset
252		✗	avio_w8(out, 0); // MovieIdentifer (null string)
253		✗	avio_w8(out, 0); // ServerEntryCount
254		✗	avio_w8(out, 0); // QualityEntryCount
255		✗	avio_w8(out, 0); // DrmData (null string)
256		✗	avio_w8(out, 0); // MetaData (null string)
257		✗	avio_w8(out, 1); // SegmentRunTableCount
258		✗	asrt_pos = avio_tell(out);
259		✗	avio_wb32(out, 0); // asrt size
260		✗	avio_wl32(out, MKTAG('a','s','r','t'));
261		✗	avio_wb32(out, 0); // version + flags
262		✗	avio_w8(out, 0); // QualityEntryCount
263		✗	avio_wb32(out, 1); // SegmentRunEntryCount
264		✗	avio_wb32(out, 1); // FirstSegment
265		✗	avio_wb32(out, final ? (os->fragment_index - 1) : 0xffffffff); // FragmentsPerSegment
266		✗	update_size(out, asrt_pos);
267		✗	avio_w8(out, 1); // FragmentRunTableCount
268		✗	afrt_pos = avio_tell(out);
269		✗	avio_wb32(out, 0); // afrt size
270		✗	avio_wl32(out, MKTAG('a','f','r','t'));
271		✗	avio_wb32(out, 0); // version + flags
272		✗	avio_wb32(out, 1000); // timescale
273		✗	avio_w8(out, 0); // QualityEntryCount
274		✗	avio_wb32(out, fragments); // FragmentRunEntryCount
275		✗	for (i = start; i < os->nb_fragments; i++) {
276		✗	avio_wb32(out, os->fragments[i]->n);
277		✗	avio_wb64(out, os->fragments[i]->start_time);
278		✗	avio_wb32(out, os->fragments[i]->duration);
279			}
280		✗	update_size(out, afrt_pos);
281		✗	update_size(out, 0);
282		✗	ff_format_io_close(s, &out);
283		✗	return ff_rename(temp_filename, filename, s);
284			}
285
286		✗	static int init_file(AVFormatContext *s, OutputStream *os, int64_t start_ts)
287			{
288			int ret, i;
289		✗	ret = s->io_open(s, &os->out, os->temp_filename, AVIO_FLAG_WRITE, NULL);
290		✗	if (ret < 0)
291		✗	return ret;
292		✗	avio_wb32(os->out, 0);
293		✗	avio_wl32(os->out, MKTAG('m','d','a','t'));
294		✗	for (i = 0; i < os->nb_extra_packets; i++) {
295		✗	AV_WB24(os->extra_packets[i] + 4, start_ts);
296		✗	os->extra_packets[i][7] = (start_ts >> 24) & 0x7f;
297		✗	avio_write(os->out, os->extra_packets[i], os->extra_packet_sizes[i]);
298			}
299		✗	return 0;
300			}
301
302		✗	static void close_file(AVFormatContext *s, OutputStream *os)
303			{
304		✗	int64_t pos = avio_tell(os->out);
305		✗	avio_seek(os->out, 0, SEEK_SET);
306		✗	avio_wb32(os->out, pos);
307		✗	avio_flush(os->out);
308		✗	ff_format_io_close(s, &os->out);
309		✗	}
310
311		✗	static int hds_write_header(AVFormatContext *s)
312			{
313		✗	HDSContext *c = s->priv_data;
314			const AVOutputFormat *oformat;
315		✗	int ret = 0, i;
316
317		✗	if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
318		✗	av_log(s, AV_LOG_ERROR , "Failed to create directory %s\n", s->url);
319		✗	return AVERROR(errno);
320			}
321
322		✗	oformat = av_guess_format("flv", NULL, NULL);
323		✗	if (!oformat) {
324		✗	return AVERROR_MUXER_NOT_FOUND;
325			}
326
327		✗	c->streams = av_calloc(s->nb_streams, sizeof(*c->streams));
328		✗	if (!c->streams) {
329		✗	return AVERROR(ENOMEM);
330			}
331
332		✗	for (i = 0; i < s->nb_streams; i++) {
333		✗	OutputStream *os = &c->streams[c->nb_streams];
334			AVFormatContext *ctx;
335		✗	AVStream *st = s->streams[i];
336
337		✗	if (!st->codecpar->bit_rate) {
338		✗	av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i);
339		✗	return AVERROR(EINVAL);
340			}
341		✗	if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
342		✗	if (os->has_video) {
343		✗	c->nb_streams++;
344		✗	os++;
345			}
346		✗	os->has_video = 1;
347		✗	} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
348		✗	if (os->has_audio) {
349		✗	c->nb_streams++;
350		✗	os++;
351			}
352		✗	os->has_audio = 1;
353			} else {
354		✗	av_log(s, AV_LOG_ERROR, "Unsupported stream type in stream %d\n", i);
355		✗	return AVERROR(EINVAL);
356			}
357		✗	os->bitrate += s->streams[i]->codecpar->bit_rate;
358
359		✗	if (!os->ctx) {
360		✗	os->first_stream = i;
361		✗	ctx = avformat_alloc_context();
362		✗	if (!ctx) {
363		✗	return AVERROR(ENOMEM);
364			}
365		✗	os->ctx = ctx;
366		✗	ctx->oformat = oformat;
367		✗	ctx->interrupt_callback = s->interrupt_callback;
368		✗	ctx->flags = s->flags;
369
370		✗	ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf),
371			1, os,
372			NULL, hds_write, NULL);
373		✗	if (!ctx->pb) {
374		✗	return AVERROR(ENOMEM);
375			}
376			} else {
377		✗	ctx = os->ctx;
378			}
379		✗	s->streams[i]->id = c->nb_streams;
380
381		✗	if (!(st = avformat_new_stream(ctx, NULL))) {
382		✗	return AVERROR(ENOMEM);
383			}
384		✗	avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
385		✗	st->codecpar->codec_tag = 0;
386		✗	st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
387		✗	st->time_base = s->streams[i]->time_base;
388			}
389		✗	if (c->streams[c->nb_streams].ctx)
390		✗	c->nb_streams++;
391
392		✗	for (i = 0; i < c->nb_streams; i++) {
393		✗	OutputStream *os = &c->streams[i];
394			int j;
395		✗	if ((ret = avformat_write_header(os->ctx, NULL)) < 0) {
396		✗	return ret;
397			}
398		✗	os->ctx_inited = 1;
399		✗	avio_flush(os->ctx->pb);
400		✗	for (j = 0; j < os->ctx->nb_streams; j++)
401		✗	s->streams[os->first_stream + j]->time_base = os->ctx->streams[j]->time_base;
402
403		✗	snprintf(os->temp_filename, sizeof(os->temp_filename),
404			"%s/stream%d_temp", s->url, i);
405		✗	ret = init_file(s, os, 0);
406		✗	if (ret < 0)
407		✗	return ret;
408
409		✗	if (!os->has_video && c->min_frag_duration <= 0) {
410		✗	av_log(s, AV_LOG_WARNING,
411			"No video stream in output stream %d and no min frag duration set\n", i);
412			}
413		✗	os->fragment_index = 1;
414		✗	write_abst(s, os, 0);
415			}
416		✗	ret = write_manifest(s, 0);
417
418		✗	return ret;
419			}
420
421		✗	static int add_fragment(OutputStream *os, const char *file,
422			int64_t start_time, int64_t duration)
423			{
424			Fragment *frag;
425		✗	if (duration == 0)
426		✗	duration = 1;
427		✗	if (os->nb_fragments >= os->fragments_size) {
428			int ret;
429		✗	os->fragments_size = (os->fragments_size + 1) * 2;
430		✗	if ((ret = av_reallocp_array(&os->fragments, os->fragments_size,
431			sizeof(*os->fragments))) < 0) {
432		✗	os->fragments_size = 0;
433		✗	os->nb_fragments = 0;
434		✗	return ret;
435			}
436			}
437		✗	frag = av_mallocz(sizeof(*frag));
438		✗	if (!frag)
439		✗	return AVERROR(ENOMEM);
440		✗	av_strlcpy(frag->file, file, sizeof(frag->file));
441		✗	frag->start_time = start_time;
442		✗	frag->duration = duration;
443		✗	frag->n = os->fragment_index;
444		✗	os->fragments[os->nb_fragments++] = frag;
445		✗	os->fragment_index++;
446		✗	return 0;
447			}
448
449		✗	static int hds_flush(AVFormatContext *s, OutputStream *os, int final,
450			int64_t end_ts)
451			{
452		✗	HDSContext *c = s->priv_data;
453		✗	int i, ret = 0;
454			char target_filename[1024];
455		✗	int index = s->streams[os->first_stream]->id;
456
457		✗	if (!os->packets_written)
458		✗	return 0;
459
460		✗	avio_flush(os->ctx->pb);
461		✗	os->packets_written = 0;
462		✗	close_file(s, os);
463
464		✗	snprintf(target_filename, sizeof(target_filename),
465			"%s/stream%dSeg1-Frag%d", s->url, index, os->fragment_index);
466		✗	ret = ff_rename(os->temp_filename, target_filename, s);
467		✗	if (ret < 0)
468		✗	return ret;
469		✗	add_fragment(os, target_filename, os->frag_start_ts, end_ts - os->frag_start_ts);
470
471		✗	if (!final) {
472		✗	ret = init_file(s, os, end_ts);
473		✗	if (ret < 0)
474		✗	return ret;
475			}
476
477		✗	if (c->window_size || (final && c->remove_at_exit)) {
478		✗	int remove = os->nb_fragments - c->window_size - c->extra_window_size;
479		✗	if (final && c->remove_at_exit)
480		✗	remove = os->nb_fragments;
481		✗	if (remove > 0) {
482		✗	for (i = 0; i < remove; i++) {
483		✗	unlink(os->fragments[i]->file);
484		✗	av_freep(&os->fragments[i]);
485			}
486		✗	os->nb_fragments -= remove;
487		✗	memmove(os->fragments, os->fragments + remove,
488		✗	os->nb_fragments * sizeof(*os->fragments));
489			}
490			}
491
492		✗	if (ret >= 0)
493		✗	ret = write_abst(s, os, final);
494		✗	return ret;
495			}
496
497		✗	static int hds_write_packet(AVFormatContext *s, AVPacket *pkt)
498			{
499		✗	HDSContext *c = s->priv_data;
500		✗	AVStream *st = s->streams[pkt->stream_index];
501		✗	FFStream *const sti = ffstream(st);
502		✗	OutputStream *os = &c->streams[s->streams[pkt->stream_index]->id];
503		✗	int64_t end_dts = os->fragment_index * (int64_t)c->min_frag_duration;
504			int ret;
505
506		✗	if (sti->first_dts == AV_NOPTS_VALUE)
507		✗	sti->first_dts = pkt->dts;
508
509		✗	if ((!os->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
510		✗	av_compare_ts(pkt->dts - sti->first_dts, st->time_base,
511		✗	end_dts, AV_TIME_BASE_Q) >= 0 &&
512		✗	pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
513
514		✗	if ((ret = hds_flush(s, os, 0, pkt->dts)) < 0)
515		✗	return ret;
516			}
517
518			// Note, these fragment start timestamps, that represent a whole
519			// OutputStream, assume all streams in it have the same time base.
520		✗	if (!os->packets_written)
521		✗	os->frag_start_ts = pkt->dts;
522		✗	os->last_ts = pkt->dts;
523
524		✗	os->packets_written++;
525		✗	return ff_write_chained(os->ctx, pkt->stream_index - os->first_stream, pkt, s, 0);
526			}
527
528		✗	static int hds_write_trailer(AVFormatContext *s)
529			{
530		✗	HDSContext *c = s->priv_data;
531			int i;
532
533		✗	for (i = 0; i < c->nb_streams; i++)
534		✗	hds_flush(s, &c->streams[i], 1, c->streams[i].last_ts);
535		✗	write_manifest(s, 1);
536
537		✗	if (c->remove_at_exit) {
538			char filename[1024];
539		✗	snprintf(filename, sizeof(filename), "%s/index.f4m", s->url);
540		✗	unlink(filename);
541		✗	for (i = 0; i < c->nb_streams; i++) {
542		✗	snprintf(filename, sizeof(filename), "%s/stream%d.abst", s->url, i);
543		✗	unlink(filename);
544			}
545		✗	rmdir(s->url);
546			}
547
548		✗	return 0;
549			}
550
551			#define OFFSET(x) offsetof(HDSContext, x)
552			#define E AV_OPT_FLAG_ENCODING_PARAM
553			static const AVOption options[] = {
554			{ "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
555			{ "extra_window_size", "number of fragments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
556			{ "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 10000000 }, 0, INT_MAX, E },
557			{ "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
558			{ NULL },
559			};
560
561			static const AVClass hds_class = {
562			.class_name = "HDS muxer",
563			.item_name = av_default_item_name,
564			.option = options,
565			.version = LIBAVUTIL_VERSION_INT,
566			};
567
568			const FFOutputFormat ff_hds_muxer = {
569			.p.name = "hds",
570			.p.long_name = NULL_IF_CONFIG_SMALL("HDS Muxer"),
571			.p.audio_codec = AV_CODEC_ID_AAC,
572			.p.video_codec = AV_CODEC_ID_H264,
573			.p.flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE,
574			.p.priv_class = &hds_class,
575			.priv_data_size = sizeof(HDSContext),
576			.write_header = hds_write_header,
577			.write_packet = hds_write_packet,
578			.write_trailer = hds_write_trailer,
579			.deinit = hds_free,
580			};
581