FFmpeg  4.4
hdsenc.c
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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 #include <float.h>
24 #if HAVE_UNISTD_H
25 #include <unistd.h>
26 #endif
27 
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "internal.h"
31 #include "os_support.h"
32 
33 #include "libavutil/avstring.h"
34 #include "libavutil/base64.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/mathematics.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;
49  int ctx_inited;
50  uint8_t iobuf[32768];
51  char temp_filename[1024];
54  int packets_written;
57 
59 
62 
66 } OutputStream;
67 
68 typedef struct HDSContext {
69  const AVClass *class; /* Class for private options. */
74 
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) {
94  return AVERROR_INVALIDDATA;
97  if (!os->extra_packets[os->nb_extra_packets])
98  return AVERROR(ENOMEM);
99  memcpy(os->extra_packets[os->nb_extra_packets], buf, size);
100  os->nb_extra_packets++;
101  } else if (type == 0x12) {
102  if (os->metadata)
103  return AVERROR_INVALIDDATA;
104  os->metadata_size = size - 11 - 4;
105  os->metadata = av_malloc(os->metadata_size);
106  if (!os->metadata)
107  return AVERROR(ENOMEM);
108  memcpy(os->metadata, buf + 11, os->metadata_size);
109  }
110  buf += size;
111  buf_size -= size;
112  }
113  if (!os->metadata)
114  return AVERROR_INVALIDDATA;
115  return 0;
116 }
117 
118 static int hds_write(void *opaque, uint8_t *buf, int buf_size)
119 {
120  OutputStream *os = opaque;
121  if (os->out) {
122  avio_write(os->out, buf, buf_size);
123  } else {
124  if (!os->metadata_size) {
125  int ret;
126  // Assuming the IO buffer is large enough to fit the
127  // FLV header and all metadata and extradata packets
128  if ((ret = parse_header(os, buf, buf_size)) < 0)
129  return ret;
130  }
131  }
132  return buf_size;
133 }
134 
136 {
137  HDSContext *c = s->priv_data;
138  int i, j;
139  if (!c->streams)
140  return;
141  for (i = 0; i < s->nb_streams; i++) {
142  OutputStream *os = &c->streams[i];
143  if (os->out)
144  ff_format_io_close(s, &os->out);
145  if (os->ctx && os->ctx_inited)
146  av_write_trailer(os->ctx);
147  if (os->ctx)
148  avio_context_free(&os->ctx->pb);
150  av_freep(&os->metadata);
151  for (j = 0; j < os->nb_extra_packets; j++)
152  av_freep(&os->extra_packets[j]);
153  for (j = 0; j < os->nb_fragments; j++)
154  av_freep(&os->fragments[j]);
155  av_freep(&os->fragments);
156  }
157  av_freep(&c->streams);
158 }
159 
160 static int write_manifest(AVFormatContext *s, int final)
161 {
162  HDSContext *c = s->priv_data;
163  AVIOContext *out;
164  char filename[1024], temp_filename[1024];
165  int ret, i;
166  double duration = 0;
167 
168  if (c->nb_streams > 0)
169  duration = c->streams[0].last_ts * av_q2d(s->streams[0]->time_base);
170 
171  snprintf(filename, sizeof(filename), "%s/index.f4m", s->url);
172  snprintf(temp_filename, sizeof(temp_filename), "%s/index.f4m.tmp", s->url);
173  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
174  if (ret < 0) {
175  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
176  return ret;
177  }
178  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
179  avio_printf(out, "<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n");
180  avio_printf(out, "\t<id>%s</id>\n", av_basename(s->url));
181  avio_printf(out, "\t<streamType>%s</streamType>\n",
182  final ? "recorded" : "live");
183  avio_printf(out, "\t<deliveryType>streaming</deliveryType>\n");
184  if (final)
185  avio_printf(out, "\t<duration>%f</duration>\n", duration);
186  for (i = 0; i < c->nb_streams; i++) {
187  OutputStream *os = &c->streams[i];
188  int b64_size = AV_BASE64_SIZE(os->metadata_size);
189  char *base64 = av_malloc(b64_size);
190  if (!base64) {
192  return AVERROR(ENOMEM);
193  }
194  av_base64_encode(base64, b64_size, os->metadata, os->metadata_size);
195 
196  avio_printf(out, "\t<bootstrapInfo profile=\"named\" url=\"stream%d.abst\" id=\"bootstrap%d\" />\n", i, i);
197  avio_printf(out, "\t<media bitrate=\"%d\" url=\"stream%d\" bootstrapInfoId=\"bootstrap%d\">\n", os->bitrate/1000, i, i);
198  avio_printf(out, "\t\t<metadata>%s</metadata>\n", base64);
199  avio_printf(out, "\t</media>\n");
200  av_free(base64);
201  }
202  avio_printf(out, "</manifest>\n");
203  avio_flush(out);
205  return ff_rename(temp_filename, filename, s);
206 }
207 
208 static void update_size(AVIOContext *out, int64_t pos)
209 {
210  int64_t end = avio_tell(out);
211  avio_seek(out, pos, SEEK_SET);
212  avio_wb32(out, end - pos);
213  avio_seek(out, end, SEEK_SET);
214 }
215 
216 /* Note, the .abst files need to be served with the "binary/octet"
217  * mime type, otherwise at least the OSMF player can easily fail
218  * with "stream not found" when polling for the next fragment. */
219 static int write_abst(AVFormatContext *s, OutputStream *os, int final)
220 {
221  HDSContext *c = s->priv_data;
222  AVIOContext *out;
223  char filename[1024], temp_filename[1024];
224  int i, ret;
225  int64_t asrt_pos, afrt_pos;
226  int start = 0, fragments;
227  int index = s->streams[os->first_stream]->id;
228  int64_t cur_media_time = 0;
229  if (c->window_size)
230  start = FFMAX(os->nb_fragments - c->window_size, 0);
231  fragments = os->nb_fragments - start;
232  if (final)
233  cur_media_time = os->last_ts;
234  else if (os->nb_fragments)
235  cur_media_time = os->fragments[os->nb_fragments - 1]->start_time;
236 
237  snprintf(filename, sizeof(filename),
238  "%s/stream%d.abst", s->url, index);
239  snprintf(temp_filename, sizeof(temp_filename),
240  "%s/stream%d.abst.tmp", s->url, index);
241  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
242  if (ret < 0) {
243  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
244  return ret;
245  }
246  avio_wb32(out, 0); // abst size
247  avio_wl32(out, MKTAG('a','b','s','t'));
248  avio_wb32(out, 0); // version + flags
249  avio_wb32(out, os->fragment_index - 1); // BootstrapinfoVersion
250  avio_w8(out, final ? 0 : 0x20); // profile, live, update
251  avio_wb32(out, 1000); // timescale
252  avio_wb64(out, cur_media_time);
253  avio_wb64(out, 0); // SmpteTimeCodeOffset
254  avio_w8(out, 0); // MovieIdentifer (null string)
255  avio_w8(out, 0); // ServerEntryCount
256  avio_w8(out, 0); // QualityEntryCount
257  avio_w8(out, 0); // DrmData (null string)
258  avio_w8(out, 0); // MetaData (null string)
259  avio_w8(out, 1); // SegmentRunTableCount
260  asrt_pos = avio_tell(out);
261  avio_wb32(out, 0); // asrt size
262  avio_wl32(out, MKTAG('a','s','r','t'));
263  avio_wb32(out, 0); // version + flags
264  avio_w8(out, 0); // QualityEntryCount
265  avio_wb32(out, 1); // SegmentRunEntryCount
266  avio_wb32(out, 1); // FirstSegment
267  avio_wb32(out, final ? (os->fragment_index - 1) : 0xffffffff); // FragmentsPerSegment
268  update_size(out, asrt_pos);
269  avio_w8(out, 1); // FragmentRunTableCount
270  afrt_pos = avio_tell(out);
271  avio_wb32(out, 0); // afrt size
272  avio_wl32(out, MKTAG('a','f','r','t'));
273  avio_wb32(out, 0); // version + flags
274  avio_wb32(out, 1000); // timescale
275  avio_w8(out, 0); // QualityEntryCount
276  avio_wb32(out, fragments); // FragmentRunEntryCount
277  for (i = start; i < os->nb_fragments; i++) {
278  avio_wb32(out, os->fragments[i]->n);
280  avio_wb32(out, os->fragments[i]->duration);
281  }
282  update_size(out, afrt_pos);
283  update_size(out, 0);
285  return ff_rename(temp_filename, filename, s);
286 }
287 
288 static int init_file(AVFormatContext *s, OutputStream *os, int64_t start_ts)
289 {
290  int ret, i;
291  ret = s->io_open(s, &os->out, os->temp_filename, AVIO_FLAG_WRITE, NULL);
292  if (ret < 0)
293  return ret;
294  avio_wb32(os->out, 0);
295  avio_wl32(os->out, MKTAG('m','d','a','t'));
296  for (i = 0; i < os->nb_extra_packets; i++) {
297  AV_WB24(os->extra_packets[i] + 4, start_ts);
298  os->extra_packets[i][7] = (start_ts >> 24) & 0x7f;
300  }
301  return 0;
302 }
303 
305 {
306  int64_t pos = avio_tell(os->out);
307  avio_seek(os->out, 0, SEEK_SET);
308  avio_wb32(os->out, pos);
309  avio_flush(os->out);
310  ff_format_io_close(s, &os->out);
311 }
312 
314 {
315  HDSContext *c = s->priv_data;
316  int ret = 0, i;
317  ff_const59 AVOutputFormat *oformat;
318 
319  if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
320  av_log(s, AV_LOG_ERROR , "Failed to create directory %s\n", s->url);
321  return AVERROR(errno);
322  }
323 
324  oformat = av_guess_format("flv", NULL, NULL);
325  if (!oformat) {
327  }
328 
329  c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams));
330  if (!c->streams) {
331  return AVERROR(ENOMEM);
332  }
333 
334  for (i = 0; i < s->nb_streams; i++) {
335  OutputStream *os = &c->streams[c->nb_streams];
337  AVStream *st = s->streams[i];
338 
339  if (!st->codecpar->bit_rate) {
340  av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i);
341  return AVERROR(EINVAL);
342  }
343  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
344  if (os->has_video) {
345  c->nb_streams++;
346  os++;
347  }
348  os->has_video = 1;
349  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
350  if (os->has_audio) {
351  c->nb_streams++;
352  os++;
353  }
354  os->has_audio = 1;
355  } else {
356  av_log(s, AV_LOG_ERROR, "Unsupported stream type in stream %d\n", i);
357  return AVERROR(EINVAL);
358  }
359  os->bitrate += s->streams[i]->codecpar->bit_rate;
360 
361  if (!os->ctx) {
362  os->first_stream = i;
364  if (!ctx) {
365  return AVERROR(ENOMEM);
366  }
367  os->ctx = ctx;
368  ctx->oformat = oformat;
369  ctx->interrupt_callback = s->interrupt_callback;
370  ctx->flags = s->flags;
371 
372  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf),
373  AVIO_FLAG_WRITE, os,
374  NULL, hds_write, NULL);
375  if (!ctx->pb) {
376  return AVERROR(ENOMEM);
377  }
378  } else {
379  ctx = os->ctx;
380  }
381  s->streams[i]->id = c->nb_streams;
382 
383  if (!(st = avformat_new_stream(ctx, NULL))) {
384  return AVERROR(ENOMEM);
385  }
386  avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
387  st->codecpar->codec_tag = 0;
388  st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
389  st->time_base = s->streams[i]->time_base;
390  }
391  if (c->streams[c->nb_streams].ctx)
392  c->nb_streams++;
393 
394  for (i = 0; i < c->nb_streams; i++) {
395  OutputStream *os = &c->streams[i];
396  int j;
397  if ((ret = avformat_write_header(os->ctx, NULL)) < 0) {
398  return ret;
399  }
400  os->ctx_inited = 1;
401  avio_flush(os->ctx->pb);
402  for (j = 0; j < os->ctx->nb_streams; j++)
403  s->streams[os->first_stream + j]->time_base = os->ctx->streams[j]->time_base;
404 
405  snprintf(os->temp_filename, sizeof(os->temp_filename),
406  "%s/stream%d_temp", s->url, i);
407  ret = init_file(s, os, 0);
408  if (ret < 0)
409  return ret;
410 
411  if (!os->has_video && c->min_frag_duration <= 0) {
413  "No video stream in output stream %d and no min frag duration set\n", i);
414  }
415  os->fragment_index = 1;
416  write_abst(s, os, 0);
417  }
418  ret = write_manifest(s, 0);
419 
420  return ret;
421 }
422 
423 static int add_fragment(OutputStream *os, const char *file,
424  int64_t start_time, int64_t duration)
425 {
426  Fragment *frag;
427  if (duration == 0)
428  duration = 1;
429  if (os->nb_fragments >= os->fragments_size) {
430  int ret;
431  os->fragments_size = (os->fragments_size + 1) * 2;
432  if ((ret = av_reallocp_array(&os->fragments, os->fragments_size,
433  sizeof(*os->fragments))) < 0) {
434  os->fragments_size = 0;
435  os->nb_fragments = 0;
436  return ret;
437  }
438  }
439  frag = av_mallocz(sizeof(*frag));
440  if (!frag)
441  return AVERROR(ENOMEM);
442  av_strlcpy(frag->file, file, sizeof(frag->file));
443  frag->start_time = start_time;
444  frag->duration = duration;
445  frag->n = os->fragment_index;
446  os->fragments[os->nb_fragments++] = frag;
447  os->fragment_index++;
448  return 0;
449 }
450 
451 static int hds_flush(AVFormatContext *s, OutputStream *os, int final,
452  int64_t end_ts)
453 {
454  HDSContext *c = s->priv_data;
455  int i, ret = 0;
456  char target_filename[1024];
457  int index = s->streams[os->first_stream]->id;
458 
459  if (!os->packets_written)
460  return 0;
461 
462  avio_flush(os->ctx->pb);
463  os->packets_written = 0;
464  close_file(s, os);
465 
466  snprintf(target_filename, sizeof(target_filename),
467  "%s/stream%dSeg1-Frag%d", s->url, index, os->fragment_index);
468  ret = ff_rename(os->temp_filename, target_filename, s);
469  if (ret < 0)
470  return ret;
471  add_fragment(os, target_filename, os->frag_start_ts, end_ts - os->frag_start_ts);
472 
473  if (!final) {
474  ret = init_file(s, os, end_ts);
475  if (ret < 0)
476  return ret;
477  }
478 
479  if (c->window_size || (final && c->remove_at_exit)) {
480  int remove = os->nb_fragments - c->window_size - c->extra_window_size;
481  if (final && c->remove_at_exit)
482  remove = os->nb_fragments;
483  if (remove > 0) {
484  for (i = 0; i < remove; i++) {
485  unlink(os->fragments[i]->file);
486  av_freep(&os->fragments[i]);
487  }
488  os->nb_fragments -= remove;
489  memmove(os->fragments, os->fragments + remove,
490  os->nb_fragments * sizeof(*os->fragments));
491  }
492  }
493 
494  if (ret >= 0)
495  ret = write_abst(s, os, final);
496  return ret;
497 }
498 
500 {
501  HDSContext *c = s->priv_data;
502  AVStream *st = s->streams[pkt->stream_index];
503  OutputStream *os = &c->streams[s->streams[pkt->stream_index]->id];
504  int64_t end_dts = os->fragment_index * (int64_t)c->min_frag_duration;
505  int ret;
506 
507  if (st->first_dts == AV_NOPTS_VALUE)
508  st->first_dts = pkt->dts;
509 
510  if ((!os->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
512  end_dts, AV_TIME_BASE_Q) >= 0 &&
514 
515  if ((ret = hds_flush(s, os, 0, pkt->dts)) < 0)
516  return ret;
517  }
518 
519  // Note, these fragment start timestamps, that represent a whole
520  // OutputStream, assume all streams in it have the same time base.
521  if (!os->packets_written)
522  os->frag_start_ts = pkt->dts;
523  os->last_ts = pkt->dts;
524 
525  os->packets_written++;
526  return ff_write_chained(os->ctx, pkt->stream_index - os->first_stream, pkt, s, 0);
527 }
528 
530 {
531  HDSContext *c = s->priv_data;
532  int i;
533 
534  for (i = 0; i < c->nb_streams; i++)
535  hds_flush(s, &c->streams[i], 1, c->streams[i].last_ts);
536  write_manifest(s, 1);
537 
538  if (c->remove_at_exit) {
539  char filename[1024];
540  snprintf(filename, sizeof(filename), "%s/index.f4m", s->url);
541  unlink(filename);
542  for (i = 0; i < c->nb_streams; i++) {
543  snprintf(filename, sizeof(filename), "%s/stream%d.abst", s->url, i);
544  unlink(filename);
545  }
546  rmdir(s->url);
547  }
548 
549  return 0;
550 }
551 
552 #define OFFSET(x) offsetof(HDSContext, x)
553 #define E AV_OPT_FLAG_ENCODING_PARAM
554 static const AVOption options[] = {
555  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
556  { "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 },
557  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 10000000 }, 0, INT_MAX, E },
558  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
559  { NULL },
560 };
561 
562 static const AVClass hds_class = {
563  .class_name = "HDS muxer",
564  .item_name = av_default_item_name,
565  .option = options,
566  .version = LIBAVUTIL_VERSION_INT,
567 };
568 
570  .name = "hds",
571  .long_name = NULL_IF_CONFIG_SMALL("HDS Muxer"),
572  .priv_data_size = sizeof(HDSContext),
573  .audio_codec = AV_CODEC_ID_AAC,
574  .video_codec = AV_CODEC_ID_H264,
579  .deinit = hds_free,
580  .priv_class = &hds_class,
581 };
uint8_t
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning.
Definition: avformat.h:533
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:461
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap avpriv_io_move and log if error happens.
Definition: avio.c:665
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:203
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:383
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:138
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:449
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:155
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:245
#define AV_RB24
Definition: intreadwrite.h:64
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:729
static int64_t start_time
Definition: ffplay.c:332
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
@ AV_OPT_TYPE_INT64
Definition: opt.h:226
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
@ AV_CODEC_ID_AAC
Definition: codec_id.h:426
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4432
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:211
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
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:506
ff_const59 AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:51
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1274
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:143
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:66
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:206
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int index
Definition: gxfenc.c:89
static void close_file(AVFormatContext *s, OutputStream *os)
Definition: hdsenc.c:304
#define E
Definition: hdsenc.c:553
static int hds_write_header(AVFormatContext *s)
Definition: hdsenc.c:313
static int hds_flush(AVFormatContext *s, OutputStream *os, int final, int64_t end_ts)
Definition: hdsenc.c:451
static const AVOption options[]
Definition: hdsenc.c:554
static int hds_write(void *opaque, uint8_t *buf, int buf_size)
Definition: hdsenc.c:118
static void update_size(AVIOContext *out, int64_t pos)
Definition: hdsenc.c:208
static int add_fragment(OutputStream *os, const char *file, int64_t start_time, int64_t duration)
Definition: hdsenc.c:423
AVOutputFormat ff_hds_muxer
Definition: hdsenc.c:569
static const AVClass hds_class
Definition: hdsenc.c:562
static int parse_header(OutputStream *os, const uint8_t *buf, int buf_size)
Definition: hdsenc.c:79
#define OFFSET(x)
Definition: hdsenc.c:552
static void hds_free(AVFormatContext *s)
Definition: hdsenc.c:135
static int hds_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hdsenc.c:499
static int write_abst(AVFormatContext *s, OutputStream *os, int final)
Definition: hdsenc.c:219
static int hds_write_trailer(AVFormatContext *s)
Definition: hdsenc.c:529
static int write_manifest(AVFormatContext *s, int final)
Definition: hdsenc.c:160
static int init_file(AVFormatContext *s, OutputStream *os, int64_t start_ts)
Definition: hdsenc.c:288
cl_device_type type
int i
Definition: input.c:407
#define AV_WB24(p, d)
Definition: intreadwrite.h:450
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1328
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5688
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVOptions.
miscellaneous OS support macros and functions.
#define FF_ARRAY_ELEMS(a)
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
Describe the class of an AVClass context structure.
Definition: log.h:67
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
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
Format I/O context.
Definition: avformat.h:1232
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1288
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1363
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1512
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1251
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
Bytestream IO Context.
Definition: avio.h:161
AVOption.
Definition: opt.h:248
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: avformat.h:1065
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:935
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
int64_t duration
Definition: hdsenc.c:41
int64_t start_time
Definition: hdsenc.c:41
char file[1024]
Definition: hdsenc.c:40
int n
Definition: hdsenc.c:42
int window_size
Definition: hdsenc.c:70
int nb_streams
Definition: hdsenc.c:76
OutputStream * streams
Definition: hdsenc.c:75
int remove_at_exit
Definition: hdsenc.c:73
int min_frag_duration
Definition: hdsenc.c:72
int extra_window_size
Definition: hdsenc.c:71
int extra_packet_sizes[2]
Definition: hdsenc.c:64
Fragment ** fragments
Definition: hdsenc.c:56
int has_video
Definition: hdsenc.c:58
uint64_t packets_written
Definition: ffmpeg.h:546
int bitrate
Definition: hdsenc.c:46
int64_t last_ts
Definition: hdsenc.c:52
char temp_filename[1024]
Definition: hdsenc.c:51
uint8_t iobuf[32768]
Definition: hdsenc.c:50
int has_audio
Definition: hdsenc.c:58
AVFormatContext * ctx
Definition: dashenc.c:100
int first_stream
Definition: hdsenc.c:47
uint8_t * extra_packets[2]
Definition: hdsenc.c:63
AVIOContext * out
Definition: dashenc.c:102
uint8_t * metadata
Definition: hdsenc.c:60
int nb_fragments
Definition: hdsenc.c:55
int fragments_size
Definition: hdsenc.c:55
int nb_extra_packets
Definition: hdsenc.c:65
int64_t frag_start_ts
Definition: hdsenc.c:52
int metadata_size
Definition: hdsenc.c:61
int fragment_index
Definition: hdsenc.c:55
int ctx_inited
Definition: dashenc.c:101
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
FILE * out
Definition: movenc.c:54
int64_t duration
Definition: movenc.c:64
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
int size
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
if(ret< 0)
Definition: vf_mcdeint.c:282
static double c[64]