FFmpeg
smoothstreamingenc.c
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1 /*
2  * Live smooth streaming fragmenter
3  * Copyright (c) 2012 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 #include "avc.h"
33 #include "url.h"
34 #include "isom.h"
35 
36 #include "libavutil/opt.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/file.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/intreadwrite.h"
41 
42 typedef struct Fragment {
43  char file[1024];
44  char infofile[1024];
45  int64_t start_time, duration;
46  int n;
47  int64_t start_pos, size;
48 } Fragment;
49 
50 typedef struct OutputStream {
51  AVFormatContext *ctx;
52  int ctx_inited;
53  char dirname[1024];
54  uint8_t iobuf[32768];
55  URLContext *out; // Current output stream where all output is written
56  URLContext *out2; // Auxiliary output stream where all output is also written
57  URLContext *tail_out; // The actual main output stream, if we're currently seeked back to write elsewhere
58  int64_t tail_pos, cur_pos, cur_start_pos;
59  int packets_written;
60  const char *stream_type_tag;
61  int nb_fragments, fragments_size, fragment_index;
62  Fragment **fragments;
63 
64  const char *fourcc;
65  char *private_str;
66  int packet_size;
67  int audio_tag;
68 } OutputStream;
69 
70 typedef struct SmoothStreamingContext {
71  const AVClass *class; /* Class for private options. */
72  int window_size;
73  int extra_window_size;
74  int lookahead_count;
75  int min_frag_duration;
76  int remove_at_exit;
77  OutputStream *streams;
78  int has_video, has_audio;
79  int nb_fragments;
80 } SmoothStreamingContext;
81 
82 static int ism_write(void *opaque, uint8_t *buf, int buf_size)
83 {
84  OutputStream *os = opaque;
85  if (os->out)
86  ffurl_write(os->out, buf, buf_size);
87  if (os->out2)
88  ffurl_write(os->out2, buf, buf_size);
89  os->cur_pos += buf_size;
90  if (os->cur_pos >= os->tail_pos)
91  os->tail_pos = os->cur_pos;
92  return buf_size;
93 }
94 
95 static int64_t ism_seek(void *opaque, int64_t offset, int whence)
96 {
97  OutputStream *os = opaque;
98  int i;
99  if (whence != SEEK_SET)
100  return AVERROR(ENOSYS);
101  if (os->tail_out) {
102  if (os->out) {
103  ffurl_close(os->out);
104  }
105  if (os->out2) {
106  ffurl_close(os->out2);
107  }
108  os->out = os->tail_out;
109  os->out2 = NULL;
110  os->tail_out = NULL;
111  }
112  if (offset >= os->cur_start_pos) {
113  if (os->out)
114  ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET);
115  os->cur_pos = offset;
116  return offset;
117  }
118  for (i = os->nb_fragments - 1; i >= 0; i--) {
119  Fragment *frag = os->fragments[i];
120  if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) {
121  int ret;
122  AVDictionary *opts = NULL;
123  os->tail_out = os->out;
124  av_dict_set(&opts, "truncate", "0", 0);
125  ret = ffurl_open_whitelist(&os->out, frag->file, AVIO_FLAG_WRITE,
126  &os->ctx->interrupt_callback, &opts, os->ctx->protocol_whitelist, os->ctx->protocol_blacklist, NULL);
127  av_dict_free(&opts);
128  if (ret < 0) {
129  os->out = os->tail_out;
130  os->tail_out = NULL;
131  return ret;
132  }
133  av_dict_set(&opts, "truncate", "0", 0);
134  ffurl_open_whitelist(&os->out2, frag->infofile, AVIO_FLAG_WRITE,
135  &os->ctx->interrupt_callback, &opts, os->ctx->protocol_whitelist, os->ctx->protocol_blacklist, NULL);
136  av_dict_free(&opts);
137  ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET);
138  if (os->out2)
139  ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET);
140  os->cur_pos = offset;
141  return offset;
142  }
143  }
144  return AVERROR(EIO);
145 }
146 
147 static void get_private_data(OutputStream *os)
148 {
149  AVCodecParameters *par = os->ctx->streams[0]->codecpar;
150  uint8_t *ptr = par->extradata;
151  int size = par->extradata_size;
152  int i;
153  if (par->codec_id == AV_CODEC_ID_H264) {
154  ff_avc_write_annexb_extradata(ptr, &ptr, &size);
155  if (!ptr)
156  ptr = par->extradata;
157  }
158  if (!ptr)
159  return;
160  os->private_str = av_mallocz(2*size + 1);
161  if (!os->private_str)
162  goto fail;
163  for (i = 0; i < size; i++)
164  snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]);
165 fail:
166  if (ptr != par->extradata)
167  av_free(ptr);
168 }
169 
170 static void ism_free(AVFormatContext *s)
171 {
172  SmoothStreamingContext *c = s->priv_data;
173  int i, j;
174  if (!c->streams)
175  return;
176  for (i = 0; i < s->nb_streams; i++) {
177  OutputStream *os = &c->streams[i];
178  ffurl_close(os->out);
179  ffurl_close(os->out2);
180  ffurl_close(os->tail_out);
181  os->out = os->out2 = os->tail_out = NULL;
182  if (os->ctx && os->ctx_inited)
183  av_write_trailer(os->ctx);
184  if (os->ctx && os->ctx->pb)
185  avio_context_free(&os->ctx->pb);
186  if (os->ctx)
187  avformat_free_context(os->ctx);
188  av_freep(&os->private_str);
189  for (j = 0; j < os->nb_fragments; j++)
190  av_freep(&os->fragments[j]);
191  av_freep(&os->fragments);
192  }
193  av_freep(&c->streams);
194 }
195 
196 static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
197 {
198  int removed = 0, i, start = 0;
199  if (os->nb_fragments <= 0)
200  return;
201  if (os->fragments[0]->n > 0)
202  removed = 1;
203  if (final)
204  skip = 0;
205  if (window_size)
206  start = FFMAX(os->nb_fragments - skip - window_size, 0);
207  for (i = start; i < os->nb_fragments - skip; i++) {
208  Fragment *frag = os->fragments[i];
209  if (!final || removed)
210  avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration);
211  else
212  avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration);
213  }
214 }
215 
216 static int write_manifest(AVFormatContext *s, int final)
217 {
218  SmoothStreamingContext *c = s->priv_data;
219  AVIOContext *out;
220  char filename[1024], temp_filename[1024];
221  int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0;
222  int64_t duration = 0;
223 
224  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
225  snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->url);
226  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
227  if (ret < 0) {
228  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
229  return ret;
230  }
231  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
232  for (i = 0; i < s->nb_streams; i++) {
233  OutputStream *os = &c->streams[i];
234  if (os->nb_fragments > 0) {
235  Fragment *last = os->fragments[os->nb_fragments - 1];
236  duration = last->start_time + last->duration;
237  }
238  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
239  video_chunks = os->nb_fragments;
240  video_streams++;
241  } else {
242  audio_chunks = os->nb_fragments;
243  audio_streams++;
244  }
245  }
246  if (!final) {
247  duration = 0;
248  video_chunks = audio_chunks = 0;
249  }
250  if (c->window_size) {
251  video_chunks = FFMIN(video_chunks, c->window_size);
252  audio_chunks = FFMIN(audio_chunks, c->window_size);
253  }
254  avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration);
255  if (!final)
256  avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count);
257  avio_printf(out, ">\n");
258  if (c->has_video) {
259  int last = -1, index = 0;
260  avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks);
261  for (i = 0; i < s->nb_streams; i++) {
262  OutputStream *os = &c->streams[i];
263  if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
264  continue;
265  last = i;
266  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%"PRId64"\" FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codecpar->bit_rate, os->fourcc, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height, os->private_str);
267  index++;
268  }
269  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
270  avio_printf(out, "</StreamIndex>\n");
271  }
272  if (c->has_audio) {
273  int last = -1, index = 0;
274  avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks);
275  for (i = 0; i < s->nb_streams; i++) {
276  OutputStream *os = &c->streams[i];
277  if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
278  continue;
279  last = i;
280  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%"PRId64"\" FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" BitsPerSample=\"16\" PacketSize=\"%d\" AudioTag=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codecpar->bit_rate, os->fourcc, s->streams[i]->codecpar->sample_rate, s->streams[i]->codecpar->channels, os->packet_size, os->audio_tag, os->private_str);
281  index++;
282  }
283  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
284  avio_printf(out, "</StreamIndex>\n");
285  }
286  avio_printf(out, "</SmoothStreamingMedia>\n");
287  avio_flush(out);
288  ff_format_io_close(s, &out);
289  return ff_rename(temp_filename, filename, s);
290 }
291 
292 static int ism_write_header(AVFormatContext *s)
293 {
294  SmoothStreamingContext *c = s->priv_data;
295  int ret = 0, i;
296  ff_const59 AVOutputFormat *oformat;
297 
298  if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
299  ret = AVERROR(errno);
300  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
301  goto fail;
302  }
303 
304  oformat = av_guess_format("ismv", NULL, NULL);
305  if (!oformat) {
306  ret = AVERROR_MUXER_NOT_FOUND;
307  goto fail;
308  }
309 
310  c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams));
311  if (!c->streams) {
312  ret = AVERROR(ENOMEM);
313  goto fail;
314  }
315 
316  for (i = 0; i < s->nb_streams; i++) {
317  OutputStream *os = &c->streams[i];
318  AVFormatContext *ctx;
319  AVStream *st;
320  AVDictionary *opts = NULL;
321 
322  if (!s->streams[i]->codecpar->bit_rate) {
323  av_log(s, AV_LOG_WARNING, "No bit rate set for stream %d\n", i);
324  // create a tmp name for the directory of fragments
325  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(Tmp_%d)", s->url, i);
326  } else {
327  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
328  }
329 
330  if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
331  ret = AVERROR(errno);
332  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
333  goto fail;
334  }
335 
336  ctx = avformat_alloc_context();
337  if (!ctx || ff_copy_whiteblacklists(ctx, s) < 0) {
338  ret = AVERROR(ENOMEM);
339  goto fail;
340  }
341  os->ctx = ctx;
342  ctx->oformat = oformat;
343  ctx->interrupt_callback = s->interrupt_callback;
344 
345  if (!(st = avformat_new_stream(ctx, NULL))) {
346  ret = AVERROR(ENOMEM);
347  goto fail;
348  }
349  avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
350  st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
351  st->time_base = s->streams[i]->time_base;
352 
353  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek);
354  if (!ctx->pb) {
355  ret = AVERROR(ENOMEM);
356  goto fail;
357  }
358 
359  av_dict_set_int(&opts, "ism_lookahead", c->lookahead_count, 0);
360  av_dict_set(&opts, "movflags", "frag_custom", 0);
361  if ((ret = avformat_write_header(ctx, &opts)) < 0) {
362  goto fail;
363  }
364  os->ctx_inited = 1;
365  avio_flush(ctx->pb);
366  av_dict_free(&opts);
367  s->streams[i]->time_base = st->time_base;
368  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
369  c->has_video = 1;
370  os->stream_type_tag = "video";
371  if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
372  os->fourcc = "H264";
373  } else if (st->codecpar->codec_id == AV_CODEC_ID_VC1) {
374  os->fourcc = "WVC1";
375  } else {
376  av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
377  ret = AVERROR(EINVAL);
378  goto fail;
379  }
380  } else {
381  c->has_audio = 1;
382  os->stream_type_tag = "audio";
383  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
384  os->fourcc = "AACL";
385  os->audio_tag = 0xff;
386  } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
387  os->fourcc = "WMAP";
388  os->audio_tag = 0x0162;
389  } else {
390  av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
391  ret = AVERROR(EINVAL);
392  goto fail;
393  }
394  os->packet_size = st->codecpar->block_align ? st->codecpar->block_align : 4;
395  }
396  get_private_data(os);
397  }
398 
399  if (!c->has_video && c->min_frag_duration <= 0) {
400  av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
401  ret = AVERROR(EINVAL);
402  goto fail;
403  }
404  ret = write_manifest(s, 0);
405 
406 fail:
407  if (ret)
408  ism_free(s);
409  return ret;
410 }
411 
412 static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
413 {
414  AVIOContext *in;
415  int ret;
416  uint32_t len;
417  if ((ret = s->io_open(s, &in, filename, AVIO_FLAG_READ, NULL)) < 0)
418  return ret;
419  ret = AVERROR(EIO);
420  *moof_size = avio_rb32(in);
421  if (*moof_size < 8 || *moof_size > size)
422  goto fail;
423  if (avio_rl32(in) != MKTAG('m','o','o','f'))
424  goto fail;
425  len = avio_rb32(in);
426  if (len > *moof_size)
427  goto fail;
428  if (avio_rl32(in) != MKTAG('m','f','h','d'))
429  goto fail;
430  avio_seek(in, len - 8, SEEK_CUR);
431  avio_rb32(in); /* traf size */
432  if (avio_rl32(in) != MKTAG('t','r','a','f'))
433  goto fail;
434  while (avio_tell(in) < *moof_size) {
435  uint32_t len = avio_rb32(in);
436  uint32_t tag = avio_rl32(in);
437  int64_t end = avio_tell(in) + len - 8;
438  if (len < 8 || len >= *moof_size)
439  goto fail;
440  if (tag == MKTAG('u','u','i','d')) {
441  static const uint8_t tfxd[] = {
442  0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
443  0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
444  };
445  uint8_t uuid[16];
446  avio_read(in, uuid, 16);
447  if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
448  avio_seek(in, 4, SEEK_CUR);
449  *start_ts = avio_rb64(in);
450  *duration = avio_rb64(in);
451  ret = 0;
452  break;
453  }
454  }
455  avio_seek(in, end, SEEK_SET);
456  }
457 fail:
458  ff_format_io_close(s, &in);
459  return ret;
460 }
461 
462 static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size)
463 {
464  int err;
465  Fragment *frag;
466  if (os->nb_fragments >= os->fragments_size) {
467  os->fragments_size = (os->fragments_size + 1) * 2;
468  if ((err = av_reallocp(&os->fragments, sizeof(*os->fragments) *
469  os->fragments_size)) < 0) {
470  os->fragments_size = 0;
471  os->nb_fragments = 0;
472  return err;
473  }
474  }
475  frag = av_mallocz(sizeof(*frag));
476  if (!frag)
477  return AVERROR(ENOMEM);
478  av_strlcpy(frag->file, file, sizeof(frag->file));
479  av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
480  frag->start_time = start_time;
481  frag->duration = duration;
482  frag->start_pos = start_pos;
483  frag->size = size;
484  frag->n = os->fragment_index;
485  os->fragments[os->nb_fragments++] = frag;
486  os->fragment_index++;
487  return 0;
488 }
489 
490 static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
491 {
492  AVIOContext *in, *out;
493  int ret = 0;
494  if ((ret = s->io_open(s, &in, infile, AVIO_FLAG_READ, NULL)) < 0)
495  return ret;
496  if ((ret = s->io_open(s, &out, outfile, AVIO_FLAG_WRITE, NULL)) < 0) {
497  ff_format_io_close(s, &in);
498  return ret;
499  }
500  while (size > 0) {
501  uint8_t buf[8192];
502  int n = FFMIN(size, sizeof(buf));
503  n = avio_read(in, buf, n);
504  if (n <= 0) {
505  ret = AVERROR(EIO);
506  break;
507  }
508  avio_write(out, buf, n);
509  size -= n;
510  }
511  avio_flush(out);
512  ff_format_io_close(s, &out);
513  ff_format_io_close(s, &in);
514  return ret;
515 }
516 
517 static int ism_flush(AVFormatContext *s, int final)
518 {
519  SmoothStreamingContext *c = s->priv_data;
520  int i, ret = 0;
521 
522  for (i = 0; i < s->nb_streams; i++) {
523  OutputStream *os = &c->streams[i];
524  char filename[1024], target_filename[1024], header_filename[1024], curr_dirname[1024];
525  int64_t size;
526  int64_t start_ts, duration, moof_size;
527  if (!os->packets_written)
528  continue;
529 
530  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
531  ret = ffurl_open_whitelist(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
532  if (ret < 0)
533  break;
534  os->cur_start_pos = os->tail_pos;
535  av_write_frame(os->ctx, NULL);
536  avio_flush(os->ctx->pb);
537  os->packets_written = 0;
538  if (!os->out || os->tail_out)
539  return AVERROR(EIO);
540 
541  ffurl_close(os->out);
542  os->out = NULL;
543  size = os->tail_pos - os->cur_start_pos;
544  if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
545  break;
546 
547  if (!s->streams[i]->codecpar->bit_rate) {
548  int64_t bitrate = (int64_t) size * 8 * AV_TIME_BASE / av_rescale_q(duration, s->streams[i]->time_base, AV_TIME_BASE_Q);
549  if (!bitrate) {
550  av_log(s, AV_LOG_ERROR, "calculating bitrate got zero.\n");
551  ret = AVERROR(EINVAL);
552  return ret;
553  }
554 
555  av_log(s, AV_LOG_DEBUG, "calculated bitrate: %"PRId64"\n", bitrate);
556  s->streams[i]->codecpar->bit_rate = bitrate;
557  memcpy(curr_dirname, os->dirname, sizeof(os->dirname));
558  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
559  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
560 
561  // rename the tmp folder back to the correct name since we now have the bitrate
562  if ((ret = ff_rename((const char*)curr_dirname, os->dirname, s)) < 0)
563  return ret;
564  }
565 
566  snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
567  snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
568  copy_moof(s, filename, header_filename, moof_size);
569  ret = ff_rename(filename, target_filename, s);
570  if (ret < 0)
571  break;
572  add_fragment(os, target_filename, header_filename, start_ts, duration,
573  os->cur_start_pos, size);
574  }
575 
576  if (c->window_size || (final && c->remove_at_exit)) {
577  for (i = 0; i < s->nb_streams; i++) {
578  OutputStream *os = &c->streams[i];
579  int j;
580  int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
581  if (final && c->remove_at_exit)
582  remove = os->nb_fragments;
583  if (remove > 0) {
584  for (j = 0; j < remove; j++) {
585  unlink(os->fragments[j]->file);
586  unlink(os->fragments[j]->infofile);
587  av_freep(&os->fragments[j]);
588  }
589  os->nb_fragments -= remove;
590  memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
591  }
592  if (final && c->remove_at_exit)
593  rmdir(os->dirname);
594  }
595  }
596 
597  if (ret >= 0)
598  ret = write_manifest(s, final);
599  return ret;
600 }
601 
602 static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
603 {
604  SmoothStreamingContext *c = s->priv_data;
605  AVStream *st = s->streams[pkt->stream_index];
606  OutputStream *os = &c->streams[pkt->stream_index];
607  int64_t end_dts = (c->nb_fragments + 1) * (int64_t) c->min_frag_duration;
608  int ret;
609 
610  if (st->first_dts == AV_NOPTS_VALUE)
611  st->first_dts = pkt->dts;
612 
613  if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
614  av_compare_ts(pkt->dts - st->first_dts, st->time_base,
615  end_dts, AV_TIME_BASE_Q) >= 0 &&
616  pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
617 
618  if ((ret = ism_flush(s, 0)) < 0)
619  return ret;
620  c->nb_fragments++;
621  }
622 
623  os->packets_written++;
624  return ff_write_chained(os->ctx, 0, pkt, s, 0);
625 }
626 
627 static int ism_write_trailer(AVFormatContext *s)
628 {
629  SmoothStreamingContext *c = s->priv_data;
630  ism_flush(s, 1);
631 
632  if (c->remove_at_exit) {
633  char filename[1024];
634  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
635  unlink(filename);
636  rmdir(s->url);
637  }
638 
639  ism_free(s);
640  return 0;
641 }
642 
643 #define OFFSET(x) offsetof(SmoothStreamingContext, x)
644 #define E AV_OPT_FLAG_ENCODING_PARAM
645 static const AVOption options[] = {
646  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
647  { "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 },
648  { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
649  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
650  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
651  { NULL },
652 };
653 
654 static const AVClass ism_class = {
655  .class_name = "smooth streaming muxer",
656  .item_name = av_default_item_name,
657  .option = options,
658  .version = LIBAVUTIL_VERSION_INT,
659 };
660 
661 
662 AVOutputFormat ff_smoothstreaming_muxer = {
663  .name = "smoothstreaming",
664  .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
665  .priv_data_size = sizeof(SmoothStreamingContext),
666  .audio_codec = AV_CODEC_ID_AAC,
667  .video_codec = AV_CODEC_ID_H264,
668  .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE,
669  .write_header = ism_write_header,
670  .write_packet = ism_write_packet,
671  .write_trailer = ism_write_trailer,
672  .priv_class = &ism_class,
673 };
write_manifest
static int write_manifest(AVFormatContext *s, int final)
Definition: smoothstreamingenc.c:216
OutputStream::nb_fragments
int nb_fragments
Definition: hdsenc.c:55
ism_flush
static int ism_flush(AVFormatContext *s, int final)
Definition: smoothstreamingenc.c:517
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1940
Fragment::infofile
char infofile[1024]
Definition: smoothstreamingenc.c:44
AVStream::first_dts
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: avformat.h:1083
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT64
Definition: opt.h:224
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
OutputStream::tail_out
URLContext * tail_out
Definition: smoothstreamingenc.c:57
ffurl_open_whitelist
int ffurl_open_whitelist(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist, const char *blacklist, URLContext *parent)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:307
Fragment::start_time
int64_t start_time
Definition: hdsenc.c:41
AVFormatContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1636
AVOption
AVOption.
Definition: opt.h:246
ism_write
static int ism_write(void *opaque, uint8_t *buf, int buf_size)
Definition: smoothstreamingenc.c:82
av_write_frame
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:878
ret
ret
Definition: filter_design.txt:187
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:85
OFFSET
#define OFFSET(x)
Definition: smoothstreamingenc.c:643
ism_write_header
static int ism_write_header(AVFormatContext *s)
Definition: smoothstreamingenc.c:292
ffurl_write
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:421
ff_copy_whiteblacklists
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:164
AV_OPT_TYPE_INT
Definition: opt.h:223
output_chunk_list
static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
Definition: smoothstreamingenc.c:196
AV_CODEC_ID_VC1
Definition: avcodec.h:288
Fragment::n
int n
Definition: hdsenc.c:42
ff_write_chained
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:1311
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
ism_write_packet
static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: smoothstreamingenc.c:602
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
OutputStream::out
URLContext * out
Definition: smoothstreamingenc.c:55
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
OutputStream::ctx
AVFormatContext * ctx
Definition: dashenc.c:78
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
ism_free
static void ism_free(AVFormatContext *s)
Definition: smoothstreamingenc.c:170
OutputStream::packets_written
uint64_t packets_written
Definition: ffmpeg.h:534
AV_CODEC_ID_H264
Definition: avcodec.h:245
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3945
AVFormatContext
Format I/O context.
Definition: avformat.h:1358
AV_CODEC_ID_WMAPRO
Definition: avcodec.h:601
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
uint8_t
uint8_t
Definition: audio_convert.c:194
OutputStream::fragment_index
int fragment_index
Definition: hdsenc.c:55
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:4019
opt.h
AVOptions.
os_support.h
miscellaneous OS support macros and functions.
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:84
add_fragment
static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size)
Definition: smoothstreamingenc.c:462
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
OutputStream::dirname
char dirname[1024]
Definition: smoothstreamingenc.c:53
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5637
AV_CODEC_ID_AAC
Definition: avcodec.h:566
OutputStream::ctx_inited
int ctx_inited
Definition: dashenc.c:79
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4455
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
avformat_alloc_context
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
file.h
Misc file utilities.
OutputStream::iobuf
uint8_t iobuf[32768]
Definition: hdsenc.c:50
avio_internal.h
ff_avc_write_annexb_extradata
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
Definition: avc.c:198
AVFormatContext::protocol_whitelist
char * protocol_whitelist
&#39;,&#39; separated list of allowed protocols.
Definition: avformat.h:1918
tag
uint32_t tag
Definition: movenc.c:1496
size
ptrdiff_t size
Definition: opengl_enc.c:100
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:922
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3982
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
E
#define E
Definition: smoothstreamingenc.c:644
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
iobuf
uint8_t iobuf[32768]
Definition: movenc.c:49
ff_const59
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:549
avio_alloc_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:131
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:260
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2013
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:770
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:186
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1454
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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:203
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
options
static const AVOption options[]
Definition: smoothstreamingenc.c:645
OutputStream::out2
URLContext * out2
Definition: smoothstreamingenc.c:56
ism_class
static const AVClass ism_class
Definition: smoothstreamingenc.c:654
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
parse_fragment
static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
Definition: smoothstreamingenc.c:412
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
av_strlcpy
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
fail
#define fail()
Definition: checkasm.h:120
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
av_compare_ts
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
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3971
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
opts
AVDictionary * opts
Definition: movenc.c:50
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4070
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
Fragment::start_pos
int64_t start_pos
Definition: smoothstreamingenc.c:47
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
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:508
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:466
AVOutputFormat::name
const char * name
Definition: avformat.h:505
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:240
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVFormatContext::oformat
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1377
AVStream
Stream structure.
Definition: avformat.h:881
OutputStream::fourcc
const char * fourcc
Definition: smoothstreamingenc.c:64
OutputStream::fragments_size
int fragments_size
Definition: hdsenc.c:55
OutputStream::stream_type_tag
const char * stream_type_tag
Definition: smoothstreamingenc.c:60
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
OutputStream::fragments
Fragment ** fragments
Definition: hdsenc.c:56
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
ism_seek
static int64_t ism_seek(void *opaque, int64_t offset, int whence)
Definition: smoothstreamingenc.c:95
Fragment::duration
int64_t duration
Definition: hdsenc.c:41
buf
void * buf
Definition: avisynth_c.h:766
URLContext
Definition: url.h:38
ff_rename
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:591
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:70
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:194
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
index
int index
Definition: gxfenc.c:89
av_guess_format
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
snprintf
#define snprintf
Definition: snprintf.h:34
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4389
ism_write_trailer
static int ism_write_trailer(AVFormatContext *s)
Definition: smoothstreamingenc.c:627
ff_smoothstreaming_muxer
AVOutputFormat ff_smoothstreaming_muxer
Definition: smoothstreamingenc.c:662
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
ffurl_close
int ffurl_close(URLContext *h)
Definition: avio.c:467
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4063
bitrate
int64_t bitrate
Definition: h264_levels.c:131
copy_moof
static int copy_moof(AVFormatContext *s, const char *infile, const char *outfile, int64_t size)
Definition: smoothstreamingenc.c:490
avformat.h
Main libavformat public API header.
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:463
ffurl_seek
int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
Change the position that will be used by the next read/write operation on the resource accessed by h...
Definition: avio.c:434
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
avio_context_free
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
len
int len
Definition: vorbis_enc_data.h:452
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1386
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3967
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4059
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
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:1247
AVFormatContext::protocol_blacklist
char * protocol_blacklist
&#39;,&#39; separated list of disallowed protocols.
Definition: avformat.h:1953
out
FILE * out
Definition: movenc.c:54
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
start
void INT64 start
Definition: avisynth_c.h:766
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
url.h
unbuffered private I/O API
AVERROR_MUXER_NOT_FOUND
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
get_private_data
static void get_private_data(OutputStream *os)
Definition: smoothstreamingenc.c:147
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
OutputStream::out
AVIOContext * out
Definition: dashenc.c:80
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1479
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:910
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:366
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
Fragment::file
char file[1024]
Definition: hdsenc.c:40
outfile
FILE * outfile
Definition: audiogen.c:96
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
avio_printf
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
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