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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  av_freep(&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->filename);
225  snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->filename);
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, (int64_t)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, (int64_t)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  AVOutputFormat *oformat;
297 
298  if (mkdir(s->filename, 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_ERROR, "No bit rate set for stream %d\n", i);
324  ret = AVERROR(EINVAL);
325  goto fail;
326  }
327  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->filename, (int64_t)s->streams[i]->codecpar->bit_rate);
328  if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
329  ret = AVERROR(errno);
330  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
331  goto fail;
332  }
333 
334  ctx = avformat_alloc_context();
335  if (!ctx || ff_copy_whiteblacklists(ctx, s) < 0) {
336  ret = AVERROR(ENOMEM);
337  goto fail;
338  }
339  os->ctx = ctx;
340  ctx->oformat = oformat;
341  ctx->interrupt_callback = s->interrupt_callback;
342 
343  if (!(st = avformat_new_stream(ctx, NULL))) {
344  ret = AVERROR(ENOMEM);
345  goto fail;
346  }
347  avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
348  st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
349  st->time_base = s->streams[i]->time_base;
350 
351  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek);
352  if (!ctx->pb) {
353  ret = AVERROR(ENOMEM);
354  goto fail;
355  }
356 
357  av_dict_set_int(&opts, "ism_lookahead", c->lookahead_count, 0);
358  av_dict_set(&opts, "movflags", "frag_custom", 0);
359  if ((ret = avformat_write_header(ctx, &opts)) < 0) {
360  goto fail;
361  }
362  os->ctx_inited = 1;
363  avio_flush(ctx->pb);
364  av_dict_free(&opts);
365  s->streams[i]->time_base = st->time_base;
366  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
367  c->has_video = 1;
368  os->stream_type_tag = "video";
369  if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
370  os->fourcc = "H264";
371  } else if (st->codecpar->codec_id == AV_CODEC_ID_VC1) {
372  os->fourcc = "WVC1";
373  } else {
374  av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
375  ret = AVERROR(EINVAL);
376  goto fail;
377  }
378  } else {
379  c->has_audio = 1;
380  os->stream_type_tag = "audio";
381  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
382  os->fourcc = "AACL";
383  os->audio_tag = 0xff;
384  } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
385  os->fourcc = "WMAP";
386  os->audio_tag = 0x0162;
387  } else {
388  av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
389  ret = AVERROR(EINVAL);
390  goto fail;
391  }
392  os->packet_size = st->codecpar->block_align ? st->codecpar->block_align : 4;
393  }
394  get_private_data(os);
395  }
396 
397  if (!c->has_video && c->min_frag_duration <= 0) {
398  av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
399  ret = AVERROR(EINVAL);
400  goto fail;
401  }
402  ret = write_manifest(s, 0);
403 
404 fail:
405  if (ret)
406  ism_free(s);
407  return ret;
408 }
409 
410 static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
411 {
412  AVIOContext *in;
413  int ret;
414  uint32_t len;
415  if ((ret = s->io_open(s, &in, filename, AVIO_FLAG_READ, NULL)) < 0)
416  return ret;
417  ret = AVERROR(EIO);
418  *moof_size = avio_rb32(in);
419  if (*moof_size < 8 || *moof_size > size)
420  goto fail;
421  if (avio_rl32(in) != MKTAG('m','o','o','f'))
422  goto fail;
423  len = avio_rb32(in);
424  if (len > *moof_size)
425  goto fail;
426  if (avio_rl32(in) != MKTAG('m','f','h','d'))
427  goto fail;
428  avio_seek(in, len - 8, SEEK_CUR);
429  avio_rb32(in); /* traf size */
430  if (avio_rl32(in) != MKTAG('t','r','a','f'))
431  goto fail;
432  while (avio_tell(in) < *moof_size) {
433  uint32_t len = avio_rb32(in);
434  uint32_t tag = avio_rl32(in);
435  int64_t end = avio_tell(in) + len - 8;
436  if (len < 8 || len >= *moof_size)
437  goto fail;
438  if (tag == MKTAG('u','u','i','d')) {
439  static const uint8_t tfxd[] = {
440  0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
441  0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
442  };
443  uint8_t uuid[16];
444  avio_read(in, uuid, 16);
445  if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
446  avio_seek(in, 4, SEEK_CUR);
447  *start_ts = avio_rb64(in);
448  *duration = avio_rb64(in);
449  ret = 0;
450  break;
451  }
452  }
453  avio_seek(in, end, SEEK_SET);
454  }
455 fail:
456  ff_format_io_close(s, &in);
457  return ret;
458 }
459 
460 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)
461 {
462  int err;
463  Fragment *frag;
464  if (os->nb_fragments >= os->fragments_size) {
465  os->fragments_size = (os->fragments_size + 1) * 2;
466  if ((err = av_reallocp(&os->fragments, sizeof(*os->fragments) *
467  os->fragments_size)) < 0) {
468  os->fragments_size = 0;
469  os->nb_fragments = 0;
470  return err;
471  }
472  }
473  frag = av_mallocz(sizeof(*frag));
474  if (!frag)
475  return AVERROR(ENOMEM);
476  av_strlcpy(frag->file, file, sizeof(frag->file));
477  av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
478  frag->start_time = start_time;
479  frag->duration = duration;
480  frag->start_pos = start_pos;
481  frag->size = size;
482  frag->n = os->fragment_index;
483  os->fragments[os->nb_fragments++] = frag;
484  os->fragment_index++;
485  return 0;
486 }
487 
488 static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
489 {
490  AVIOContext *in, *out;
491  int ret = 0;
492  if ((ret = s->io_open(s, &in, infile, AVIO_FLAG_READ, NULL)) < 0)
493  return ret;
494  if ((ret = s->io_open(s, &out, outfile, AVIO_FLAG_WRITE, NULL)) < 0) {
495  ff_format_io_close(s, &in);
496  return ret;
497  }
498  while (size > 0) {
499  uint8_t buf[8192];
500  int n = FFMIN(size, sizeof(buf));
501  n = avio_read(in, buf, n);
502  if (n <= 0) {
503  ret = AVERROR(EIO);
504  break;
505  }
506  avio_write(out, buf, n);
507  size -= n;
508  }
509  avio_flush(out);
510  ff_format_io_close(s, &out);
511  ff_format_io_close(s, &in);
512  return ret;
513 }
514 
515 static int ism_flush(AVFormatContext *s, int final)
516 {
517  SmoothStreamingContext *c = s->priv_data;
518  int i, ret = 0;
519 
520  for (i = 0; i < s->nb_streams; i++) {
521  OutputStream *os = &c->streams[i];
522  char filename[1024], target_filename[1024], header_filename[1024];
523  int64_t size;
524  int64_t start_ts, duration, moof_size;
525  if (!os->packets_written)
526  continue;
527 
528  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
529  ret = ffurl_open_whitelist(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
530  if (ret < 0)
531  break;
532  os->cur_start_pos = os->tail_pos;
533  av_write_frame(os->ctx, NULL);
534  avio_flush(os->ctx->pb);
535  os->packets_written = 0;
536  if (!os->out || os->tail_out)
537  return AVERROR(EIO);
538 
539  ffurl_close(os->out);
540  os->out = NULL;
541  size = os->tail_pos - os->cur_start_pos;
542  if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
543  break;
544  snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
545  snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
546  copy_moof(s, filename, header_filename, moof_size);
547  ret = ff_rename(filename, target_filename, s);
548  if (ret < 0)
549  break;
550  add_fragment(os, target_filename, header_filename, start_ts, duration,
551  os->cur_start_pos, size);
552  }
553 
554  if (c->window_size || (final && c->remove_at_exit)) {
555  for (i = 0; i < s->nb_streams; i++) {
556  OutputStream *os = &c->streams[i];
557  int j;
558  int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
559  if (final && c->remove_at_exit)
560  remove = os->nb_fragments;
561  if (remove > 0) {
562  for (j = 0; j < remove; j++) {
563  unlink(os->fragments[j]->file);
564  unlink(os->fragments[j]->infofile);
565  av_freep(&os->fragments[j]);
566  }
567  os->nb_fragments -= remove;
568  memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
569  }
570  if (final && c->remove_at_exit)
571  rmdir(os->dirname);
572  }
573  }
574 
575  if (ret >= 0)
576  ret = write_manifest(s, final);
577  return ret;
578 }
579 
580 static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
581 {
582  SmoothStreamingContext *c = s->priv_data;
583  AVStream *st = s->streams[pkt->stream_index];
584  OutputStream *os = &c->streams[pkt->stream_index];
585  int64_t end_dts = (c->nb_fragments + 1) * (int64_t) c->min_frag_duration;
586  int ret;
587 
588  if (st->first_dts == AV_NOPTS_VALUE)
589  st->first_dts = pkt->dts;
590 
591  if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
592  av_compare_ts(pkt->dts - st->first_dts, st->time_base,
593  end_dts, AV_TIME_BASE_Q) >= 0 &&
594  pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
595 
596  if ((ret = ism_flush(s, 0)) < 0)
597  return ret;
598  c->nb_fragments++;
599  }
600 
601  os->packets_written++;
602  return ff_write_chained(os->ctx, 0, pkt, s, 0);
603 }
604 
605 static int ism_write_trailer(AVFormatContext *s)
606 {
607  SmoothStreamingContext *c = s->priv_data;
608  ism_flush(s, 1);
609 
610  if (c->remove_at_exit) {
611  char filename[1024];
612  snprintf(filename, sizeof(filename), "%s/Manifest", s->filename);
613  unlink(filename);
614  rmdir(s->filename);
615  }
616 
617  ism_free(s);
618  return 0;
619 }
620 
621 #define OFFSET(x) offsetof(SmoothStreamingContext, x)
622 #define E AV_OPT_FLAG_ENCODING_PARAM
623 static const AVOption options[] = {
624  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
625  { "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 },
626  { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
627  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
628  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
629  { NULL },
630 };
631 
632 static const AVClass ism_class = {
633  .class_name = "smooth streaming muxer",
634  .item_name = av_default_item_name,
635  .option = options,
636  .version = LIBAVUTIL_VERSION_INT,
637 };
638 
639 
640 AVOutputFormat ff_smoothstreaming_muxer = {
641  .name = "smoothstreaming",
642  .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
643  .priv_data_size = sizeof(SmoothStreamingContext),
644  .audio_codec = AV_CODEC_ID_AAC,
645  .video_codec = AV_CODEC_ID_H264,
646  .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE,
647  .write_header = ism_write_header,
648  .write_packet = ism_write_packet,
649  .write_trailer = ism_write_trailer,
650  .codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
651  .priv_class = &ism_class,
652 };
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:515
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:1058
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT64
Definition: opt.h:224
s
const char * s
Definition: avisynth_c.h:631
AVIOContext
Bytestream IO Context.
Definition: avio.h:147
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:309
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:1577
AVOption
AVOption.
Definition: opt.h:245
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:820
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:70
OFFSET
#define OFFSET(x)
Definition: smoothstreamingenc.c:621
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
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:265
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:1251
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3922
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:580
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:606
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:607
OutputStream::out
URLContext * out
Definition: smoothstreamingenc.c:55
OutputStream::ctx
AVFormatContext * ctx
Definition: dashenc.c:63
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:480
AV_CODEC_ID_H264
Definition: avcodec.h:222
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3914
AVFormatContext
Format I/O context.
Definition: avformat.h:1325
AV_CODEC_ID_WMAPRO
Definition: avcodec.h:554
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
start_time
static int64_t start_time
Definition: ffplay.c:330
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:3988
OutputStream::fragment_index
int fragment_index
Definition: hdsenc.c:55
opt.h
AVOptions.
os_support.h
miscellaneous OS support macros and functions.
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:751
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:460
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
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:5106
AV_CODEC_ID_AAC
Definition: avcodec.h:516
ff_copy_whiteblacklists
int ff_copy_whiteblacklists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:145
OutputStream::ctx_inited
int ctx_inited
Definition: dashenc.c:64
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4065
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
duration
int64_t duration
Definition: movenc.c:63
avformat_alloc_context
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:132
file.h
Misc file utilities.
OutputStream::iobuf
uint8_t iobuf[32768]
Definition: dashenc.c:65
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:164
AVFormatContext::protocol_whitelist
char * protocol_whitelist
',' separated list of allowed protocols.
Definition: avformat.h:1861
tag
uint32_t tag
Definition: movenc.c:1367
size
ptrdiff_t size
Definition: opengl_enc.c:101
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:818
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
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:598
AVFormatContext::oformat
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1344
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3951
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1612
E
#define E
Definition: smoothstreamingenc.c:622
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:126
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4059
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:68
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
AVERROR
#define AVERROR(e)
Definition: error.h:43
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:176
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:202
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3918
options
static const AVOption options[]
Definition: smoothstreamingenc.c:623
OutputStream::out2
URLContext * out2
Definition: smoothstreamingenc.c:56
ism_class
static const AVClass ism_class
Definition: smoothstreamingenc.c:632
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:194
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:410
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
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:81
ff_mp4_obj_type
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1586
av_compare_ts
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare 2 timestamps each in its own timebases.
Definition: mathematics.c:147
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3940
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
opts
AVDictionary * opts
Definition: movenc.c:50
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4039
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
Fragment::start_pos
int64_t start_pos
Definition: smoothstreamingenc.c:47
AVFormatContext::filename
char filename[1024]
input or output filename
Definition: avformat.h:1401
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:496
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:483
AVOutputFormat::name
const char * name
Definition: avformat.h:522
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:239
n
int n
Definition: avisynth_c.h:547
av_guess_format
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:98
AVStream
Stream structure.
Definition: avformat.h:876
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
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:252
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
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
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Definition: audio_convert.c:194
buf
void * buf
Definition: avisynth_c.h:553
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:500
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:69
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
index
int index
Definition: gxfenc.c:89
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:4001
ism_write_trailer
static int ism_write_trailer(AVFormatContext *s)
Definition: smoothstreamingenc.c:605
ff_smoothstreaming_muxer
AVOutputFormat ff_smoothstreaming_muxer
Definition: smoothstreamingenc.c:640
flags
static int flags
Definition: cpu.c:47
ffurl_close
int ffurl_close(URLContext *h)
Definition: avio.c:467
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4032
copy_moof
static int copy_moof(AVFormatContext *s, const char *infile, const char *outfile, int64_t size)
Definition: smoothstreamingenc.c:488
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:476
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
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
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:146
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:187
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:1353
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:498
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3936
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4028
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1579
av_mallocz_array
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
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:1184
AVFormatContext::protocol_blacklist
char * protocol_blacklist
',' separated list of disallowed protocols.
Definition: avformat.h:1896
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:553
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
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
Definition: avformat.h:1006
OutputStream::out
AVIOContext * out
Definition: dashenc.c:66
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1582
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:913
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1883
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1557
write_packet
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
av_mallocz
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
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:240
avio_printf
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
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