FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/fftools/ffmpeg_mux.c
Date: 2026-01-22 21:25:49
Exec Total Coverage
Lines: 368 493 74.6%
Functions: 22 24 91.7%
Branches: 197 280 70.4%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include <stdatomic.h>
20 #include <stdio.h>
21 #include <string.h>
22
23 #include "ffmpeg.h"
24 #include "ffmpeg_mux.h"
25 #include "ffmpeg_utils.h"
26 #include "sync_queue.h"
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/fifo.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/log.h"
32 #include "libavutil/mem.h"
33 #include "libavutil/time.h"
34 #include "libavutil/timestamp.h"
35
36 #include "libavcodec/packet.h"
37
38 #include "libavformat/avformat.h"
39 #include "libavformat/avio.h"
40
41 typedef struct MuxThreadContext {
42 AVPacket *pkt;
43 AVPacket *fix_sub_duration_pkt;
44 } MuxThreadContext;
45
46 60803 static Muxer *mux_from_of(OutputFile *of)
47 {
48 60803 return (Muxer*)of;
49 }
50
51 527934 static int64_t filesize(AVIOContext *pb)
52 {
53 527934 int64_t ret = -1;
54
55
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 527934 if (pb) {
56 518114 ret = avio_size(pb);
57
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 518114 if (ret <= 0) // FIXME improve avio_size() so it works with non seekable output too
58 106446 ret = avio_tell(pb);
59 }
60
61 527934 return ret;
62 }
63
64 ✗ static void mux_log_debug_ts(OutputStream *ost, const AVPacket *pkt)
65 {
66 static const char *desc[] = {
67 [LATENCY_PROBE_DEMUX] = "demux",
68 [LATENCY_PROBE_DEC_PRE] = "decode",
69 [LATENCY_PROBE_DEC_POST] = "decode",
70 [LATENCY_PROBE_FILTER_PRE] = "filter",
71 [LATENCY_PROBE_FILTER_POST] = "filter",
72 [LATENCY_PROBE_ENC_PRE] = "encode",
73 [LATENCY_PROBE_ENC_POST] = "encode",
74 [LATENCY_PROBE_NB] = "mux",
75 };
76
77 char latency[512];
78
79 ✗ *latency = 0;
80 ✗ if (pkt->opaque_ref) {
81 ✗ const FrameData *fd = (FrameData*)pkt->opaque_ref->data;
82 ✗ int64_t now = av_gettime_relative();
83 ✗ int64_t total = INT64_MIN;
84
85 int next;
86
87 ✗ for (unsigned i = 0; i < FF_ARRAY_ELEMS(fd->wallclock); i = next) {
88 ✗ int64_t val = fd->wallclock[i];
89
90 ✗ next = i + 1;
91
92 ✗ if (val == INT64_MIN)
93 ✗ continue;
94
95 ✗ if (total == INT64_MIN) {
96 ✗ total = now - val;
97 ✗ snprintf(latency, sizeof(latency), "total:%gms", total / 1e3);
98 }
99
100 // find the next valid entry
101 ✗ for (; next <= FF_ARRAY_ELEMS(fd->wallclock); next++) {
102 ✗ int64_t val_next = (next == FF_ARRAY_ELEMS(fd->wallclock)) ?
103 ✗ now : fd->wallclock[next];
104 int64_t diff;
105
106 ✗ if (val_next == INT64_MIN)
107 ✗ continue;
108 ✗ diff = val_next - val;
109
110 // print those stages that take at least 5% of total
111 ✗ if (100. * diff > 5. * total) {
112 ✗ av_strlcat(latency, ", ", sizeof(latency));
113
114 ✗ if (!strcmp(desc[i], desc[next]))
115 ✗ av_strlcat(latency, desc[i], sizeof(latency));
116 else
117 ✗ av_strlcatf(latency, sizeof(latency), "%s-%s:",
118 desc[i], desc[next]);
119
120 ✗ av_strlcatf(latency, sizeof(latency), " %gms/%d%%",
121 ✗ diff / 1e3, (int)(100. * diff / total));
122 }
123
124 ✗ break;
125 }
126
127 }
128 }
129
130 ✗ av_log(ost, AV_LOG_INFO, "muxer <- pts:%s pts_time:%s dts:%s dts_time:%s "
131 "duration:%s duration_time:%s size:%d latency(%s)\n",
132 ✗ av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
133 ✗ av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
134 ✗ av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ost->st->time_base),
135 ✗ pkt->size, *latency ? latency : "N/A");
136 ✗ }
137
138 519460 static int mux_fixup_ts(Muxer *mux, MuxStream *ms, AVPacket *pkt)
139 {
140 519460 OutputStream *ost = &ms->ost;
141
142 #if FFMPEG_OPT_VSYNC_DROP
143
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 519460 if (ost->type == AVMEDIA_TYPE_VIDEO && ms->ts_drop)
144 ✗ pkt->pts = pkt->dts = AV_NOPTS_VALUE;
145 #endif
146
147 // rescale timestamps to the stream timebase
148
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 519460 if (ost->type == AVMEDIA_TYPE_AUDIO && !ost->enc) {
149 // use av_rescale_delta() for streamcopying audio, to preserve
150 // accuracy with coarse input timebases
151 50546 int duration = av_get_audio_frame_duration2(ost->st->codecpar, pkt->size);
152
153
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 50546 if (!duration)
154 16640 duration = ost->st->codecpar->frame_size;
155
156 101092 pkt->dts = av_rescale_delta(pkt->time_base, pkt->dts,
157 50546 (AVRational){1, ost->st->codecpar->sample_rate}, duration,
158 50546 &ms->ts_rescale_delta_last, ost->st->time_base);
159 50546 pkt->pts = pkt->dts;
160
161 50546 pkt->duration = av_rescale_q(pkt->duration, pkt->time_base, ost->st->time_base);
162 } else
163 468914 av_packet_rescale_ts(pkt, pkt->time_base, ost->st->time_base);
164 519460 pkt->time_base = ost->st->time_base;
165
166
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 519460 if (!(mux->fc->oformat->flags & AVFMT_NOTIMESTAMPS)) {
167
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 228566 if (pkt->dts != AV_NOPTS_VALUE &&
168
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 228566 pkt->pts != AV_NOPTS_VALUE &&
169
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 227469 pkt->dts > pkt->pts) {
170 2 av_log(ost, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64", replacing by guess\n",
171 pkt->dts, pkt->pts);
172 2 pkt->pts =
173 2 pkt->dts = pkt->pts + pkt->dts + ms->last_mux_dts + 1
174 2 - FFMIN3(pkt->pts, pkt->dts, ms->last_mux_dts + 1)
175 2 - FFMAX3(pkt->pts, pkt->dts, ms->last_mux_dts + 1);
176 }
177
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 228566 if ((ost->type == AVMEDIA_TYPE_AUDIO || ost->type == AVMEDIA_TYPE_VIDEO || ost->type == AVMEDIA_TYPE_SUBTITLE) &&
178
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 228489 pkt->dts != AV_NOPTS_VALUE &&
179
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 228489 ms->last_mux_dts != AV_NOPTS_VALUE) {
180 222220 int64_t max = ms->last_mux_dts + !(mux->fc->oformat->flags & AVFMT_TS_NONSTRICT);
181
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 222220 if (pkt->dts < max) {
182
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 45 int loglevel = max - pkt->dts > 2 || ost->type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
183
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 45 if (exit_on_error)
184 ✗ loglevel = AV_LOG_ERROR;
185 45 av_log(ost, loglevel, "Non-monotonic DTS; "
186 "previous: %"PRId64", current: %"PRId64"; ",
187 ms->last_mux_dts, pkt->dts);
188
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 45 if (exit_on_error) {
189 ✗ return AVERROR(EINVAL);
190 }
191
192 45 av_log(ost, loglevel, "changing to %"PRId64". This may result "
193 "in incorrect timestamps in the output file.\n",
194 max);
195
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 45 if (pkt->pts >= pkt->dts)
196 45 pkt->pts = FFMAX(pkt->pts, max);
197 45 pkt->dts = max;
198 }
199 }
200 }
201 519460 ms->last_mux_dts = pkt->dts;
202
203
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 519460 if (debug_ts)
204 ✗ mux_log_debug_ts(ost, pkt);
205
206 519460 return 0;
207 }
208
209 519460 static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
210 {
211 519460 MuxStream *ms = ms_from_ost(ost);
212 519460 AVFormatContext *s = mux->fc;
213 int64_t fs;
214 uint64_t frame_num;
215 int ret;
216
217 519460 fs = filesize(s->pb);
218 519460 atomic_store(&mux->last_filesize, fs);
219
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 519460 if (fs >= mux->limit_filesize) {
220 ✗ ret = AVERROR_EOF;
221 ✗ goto fail;
222 }
223
224 519460 ret = mux_fixup_ts(mux, ms, pkt);
225
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 519460 if (ret < 0)
226 ✗ goto fail;
227
228 519460 ms->data_size_mux += pkt->size;
229 519460 frame_num = atomic_fetch_add(&ost->packets_written, 1);
230
231 519460 pkt->stream_index = ost->index;
232
233
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 519460 if (ms->stats.io)
234 ✗ enc_stats_write(ost, &ms->stats, NULL, pkt, frame_num);
235
236 519460 ret = av_interleaved_write_frame(s, pkt);
237
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 519460 if (ret < 0) {
238 ✗ av_log(ost, AV_LOG_ERROR,
239 "Error submitting a packet to the muxer: %s\n",
240 ✗ av_err2str(ret));
241 ✗ goto fail;
242 }
243
244 519460 return 0;
245 ✗ fail:
246 ✗ av_packet_unref(pkt);
247 ✗ return ret;
248 }
249
250 528475 static int sync_queue_process(Muxer *mux, MuxStream *ms, AVPacket *pkt, int *stream_eof)
251 {
252 528475 OutputFile *of = &mux->of;
253
254
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 528475 if (ms->sq_idx_mux >= 0) {
255 966 int ret = sq_send(mux->sq_mux, ms->sq_idx_mux, SQPKT(pkt));
256
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 966 if (ret < 0) {
257
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 30 if (ret == AVERROR_EOF)
258 30 *stream_eof = 1;
259
260 30 return ret;
261 }
262
263 875 while (1) {
264 1811 ret = sq_receive(mux->sq_mux, -1, SQPKT(mux->sq_pkt));
265
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 1811 if (ret < 0) {
266 /* n.b.: We forward EOF from the sync queue, terminating muxing.
267 * This assumes that if a muxing sync queue is present, then all
268 * the streams use it. That is true currently, but may change in
269 * the future, then this code needs to be revisited.
270 */
271
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 936 return ret == AVERROR(EAGAIN) ? 0 : ret;
272 }
273
274 875 ret = write_packet(mux, of->streams[ret],
275 mux->sq_pkt);
276
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 875 if (ret < 0)
277 ✗ return ret;
278 }
279
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 527509 } else if (pkt)
280 518585 return write_packet(mux, &ms->ost, pkt);
281
282 8924 return 0;
283 }
284
285 static int of_streamcopy(OutputFile *of, OutputStream *ost, AVPacket *pkt);
286
287 /* apply the output bitstream filters */
288 529365 static int mux_packet_filter(Muxer *mux, MuxThreadContext *mt,
289 OutputStream *ost, AVPacket *pkt, int *stream_eof)
290 {
291 529365 MuxStream *ms = ms_from_ost(ost);
292 const char *err_msg;
293 int ret;
294
295
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 529365 if (pkt && !ost->enc) {
296 70898 ret = of_streamcopy(&mux->of, ost, pkt);
297
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 70898 if (ret == AVERROR(EAGAIN))
298 273 return 0;
299
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 70625 else if (ret == AVERROR_EOF) {
300 48 av_packet_unref(pkt);
301 48 pkt = NULL;
302 48 *stream_eof = 1;
303
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 70577 } else if (ret < 0)
304 ✗ goto fail;
305 }
306
307 // emit heartbeat for -fix_sub_duration;
308 // we are only interested in heartbeats on on random access points.
309
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 529092 if (pkt && (pkt->flags & AV_PKT_FLAG_KEY)) {
310 480500 mt->fix_sub_duration_pkt->opaque = (void*)(intptr_t)PKT_OPAQUE_FIX_SUB_DURATION;
311 480500 mt->fix_sub_duration_pkt->pts = pkt->pts;
312 480500 mt->fix_sub_duration_pkt->time_base = pkt->time_base;
313
314 480500 ret = sch_mux_sub_heartbeat(mux->sch, mux->sch_idx, ms->sch_idx,
315 480500 mt->fix_sub_duration_pkt);
316
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 480500 if (ret < 0)
317 ✗ goto fail;
318 }
319
320
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 529092 if (ms->bsf_ctx) {
321 10755 int bsf_eof = 0;
322
323
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 10755 if (pkt)
324 10611 av_packet_rescale_ts(pkt, pkt->time_base, ms->bsf_ctx->time_base_in);
325
326 10755 ret = av_bsf_send_packet(ms->bsf_ctx, pkt);
327
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 10755 if (ret < 0) {
328 ✗ err_msg = "submitting a packet for bitstream filtering";
329 ✗ goto fail;
330 }
331
332
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 20893 while (!bsf_eof) {
333 20751 ret = av_bsf_receive_packet(ms->bsf_ctx, ms->bsf_pkt);
334
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 20751 if (ret == AVERROR(EAGAIN))
335 10611 return 0;
336
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 10140 else if (ret == AVERROR_EOF)
337 142 bsf_eof = 1;
338
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 9998 else if (ret < 0) {
339 2 av_log(ost, AV_LOG_ERROR,
340 "Error applying bitstream filters to a packet: %s",
341 2 av_err2str(ret));
342
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 2 if (exit_on_error)
343 ✗ return ret;
344 2 continue;
345 }
346
347
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 10138 if (!bsf_eof)
348 9996 ms->bsf_pkt->time_base = ms->bsf_ctx->time_base_out;
349
350
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 10138 ret = sync_queue_process(mux, ms, bsf_eof ? NULL : ms->bsf_pkt, stream_eof);
351
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 10138 if (ret < 0)
352 2 goto mux_fail;
353 }
354 142 *stream_eof = 1;
355 } else {
356 518337 ret = sync_queue_process(mux, ms, pkt, stream_eof);
357
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 518337 if (ret < 0)
358 41 goto mux_fail;
359 }
360
361
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 518438 return *stream_eof ? AVERROR_EOF : 0;
362
363 43 mux_fail:
364 43 err_msg = "submitting a packet to the muxer";
365
366 43 fail:
367
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 43 if (ret != AVERROR_EOF)
368 ✗ av_log(ost, AV_LOG_ERROR, "Error %s: %s\n", err_msg, av_err2str(ret));
369 43 return ret;
370 }
371
372 8474 static void thread_set_name(Muxer *mux)
373 {
374 char name[16];
375 8474 snprintf(name, sizeof(name), "mux%d:%s",
376 8474 mux->of.index, mux->fc->oformat->name);
377 8474 ff_thread_setname(name);
378 8474 }
379
380 8474 static void mux_thread_uninit(MuxThreadContext *mt)
381 {
382 8474 av_packet_free(&mt->pkt);
383 8474 av_packet_free(&mt->fix_sub_duration_pkt);
384
385 8474 memset(mt, 0, sizeof(*mt));
386 8474 }
387
388 8474 static int mux_thread_init(MuxThreadContext *mt)
389 {
390 8474 memset(mt, 0, sizeof(*mt));
391
392 8474 mt->pkt = av_packet_alloc();
393
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 8474 if (!mt->pkt)
394 ✗ goto fail;
395
396 8474 mt->fix_sub_duration_pkt = av_packet_alloc();
397
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 8474 if (!mt->fix_sub_duration_pkt)
398 ✗ goto fail;
399
400 8474 return 0;
401
402 ✗ fail:
403 ✗ mux_thread_uninit(mt);
404 ✗ return AVERROR(ENOMEM);
405 }
406
407 8474 int muxer_thread(void *arg)
408 {
409 8474 Muxer *mux = arg;
410 8474 OutputFile *of = &mux->of;
411
412 MuxThreadContext mt;
413
414 8474 int ret = 0;
415
416 8474 ret = mux_thread_init(&mt);
417
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 8474 if (ret < 0)
418 ✗ goto finish;
419
420 8474 thread_set_name(mux);
421
422 529352 while (1) {
423 OutputStream *ost;
424 537826 int stream_idx, stream_eof = 0;
425
426 537826 ret = sch_mux_receive(mux->sch, of->index, mt.pkt);
427 537826 stream_idx = mt.pkt->stream_index;
428
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 537826 if (stream_idx < 0) {
429 8461 av_log(mux, AV_LOG_VERBOSE, "All streams finished\n");
430 8461 ret = 0;
431 8474 break;
432 }
433
434 529365 ost = of->streams[mux->sch_stream_idx[stream_idx]];
435 529365 mt.pkt->stream_index = ost->index;
436 529365 mt.pkt->flags &= ~AV_PKT_FLAG_TRUSTED;
437
438
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 529365 ret = mux_packet_filter(mux, &mt, ost, ret < 0 ? NULL : mt.pkt, &stream_eof);
439 529365 av_packet_unref(mt.pkt);
440
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 529365 if (ret == AVERROR_EOF) {
441
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 232 if (stream_eof) {
442 219 sch_mux_receive_finish(mux->sch, of->index, stream_idx);
443 } else {
444 13 av_log(mux, AV_LOG_VERBOSE, "Muxer returned EOF\n");
445 13 ret = 0;
446 13 break;
447 }
448
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 529133 } else if (ret < 0) {
449 ✗ av_log(mux, AV_LOG_ERROR, "Error muxing a packet\n");
450 ✗ break;
451 }
452 }
453
454 8474 finish:
455 8474 mux_thread_uninit(&mt);
456
457 8474 return ret;
458 }
459
460 70898 static int of_streamcopy(OutputFile *of, OutputStream *ost, AVPacket *pkt)
461 {
462 70898 MuxStream *ms = ms_from_ost(ost);
463
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 70898 FrameData *fd = pkt->opaque_ref ? (FrameData*)pkt->opaque_ref->data : NULL;
464
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 70898 int64_t dts = fd ? fd->dts_est : AV_NOPTS_VALUE;
465
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 70898 int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
466 int64_t ts_offset;
467
468
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 70898 if (of->recording_time != INT64_MAX &&
469
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 1574 dts >= of->recording_time + start_time)
470 48 return AVERROR_EOF;
471
472
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 70850 if (!ms->streamcopy_started && !(pkt->flags & AV_PKT_FLAG_KEY) &&
473
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 90 !ms->copy_initial_nonkeyframes)
474 90 return AVERROR(EAGAIN);
475
476
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 70760 if (!ms->streamcopy_started) {
477
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 908 if (!ms->copy_prior_start &&
478 ✗ (pkt->pts == AV_NOPTS_VALUE ?
479 ✗ dts < ms->ts_copy_start :
480 ✗ pkt->pts < av_rescale_q(ms->ts_copy_start, AV_TIME_BASE_Q, pkt->time_base)))
481 ✗ return AVERROR(EAGAIN);
482
483
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 908 if (of->start_time != AV_NOPTS_VALUE && dts < of->start_time)
484 183 return AVERROR(EAGAIN);
485 }
486
487 70577 ts_offset = av_rescale_q(start_time, AV_TIME_BASE_Q, pkt->time_base);
488
489
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 70577 if (pkt->pts != AV_NOPTS_VALUE)
490 62023 pkt->pts -= ts_offset;
491
492
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 70577 if (pkt->dts == AV_NOPTS_VALUE) {
493 8322 pkt->dts = av_rescale_q(dts, AV_TIME_BASE_Q, pkt->time_base);
494
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 62255 } else if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
495 50582 pkt->pts = pkt->dts - ts_offset;
496 }
497
498 70577 pkt->dts -= ts_offset;
499
500 70577 ms->streamcopy_started = 1;
501
502 70577 return 0;
503 }
504
505 int print_sdp(const char *filename);
506
507 ✗ int print_sdp(const char *filename)
508 {
509 char sdp[16384];
510 ✗ int j = 0, ret;
511 AVIOContext *sdp_pb;
512 AVFormatContext **avc;
513
514 ✗ avc = av_malloc_array(nb_output_files, sizeof(*avc));
515 ✗ if (!avc)
516 ✗ return AVERROR(ENOMEM);
517 ✗ for (int i = 0; i < nb_output_files; i++) {
518 ✗ Muxer *mux = mux_from_of(output_files[i]);
519
520 ✗ if (!strcmp(mux->fc->oformat->name, "rtp")) {
521 ✗ avc[j] = mux->fc;
522 ✗ j++;
523 }
524 }
525
526 ✗ if (!j) {
527 ✗ av_log(NULL, AV_LOG_ERROR, "No output streams in the SDP.\n");
528 ✗ ret = AVERROR(EINVAL);
529 ✗ goto fail;
530 }
531
532 ✗ ret = av_sdp_create(avc, j, sdp, sizeof(sdp));
533 ✗ if (ret < 0)
534 ✗ goto fail;
535
536 ✗ if (!filename) {
537 ✗ printf("SDP:\n%s\n", sdp);
538 ✗ fflush(stdout);
539 } else {
540 ✗ ret = avio_open2(&sdp_pb, filename, AVIO_FLAG_WRITE, &int_cb, NULL);
541 ✗ if (ret < 0) {
542 ✗ av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", filename);
543 ✗ goto fail;
544 }
545
546 ✗ avio_print(sdp_pb, sdp);
547 ✗ avio_closep(&sdp_pb);
548 }
549
550 ✗ fail:
551 ✗ av_freep(&avc);
552 ✗ return ret;
553 }
554
555 8474 int mux_check_init(void *arg)
556 {
557 8474 Muxer *mux = arg;
558 8474 OutputFile *of = &mux->of;
559 8474 AVFormatContext *fc = mux->fc;
560 int ret;
561
562 8474 ret = avformat_write_header(fc, &mux->opts);
563
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 8474 if (ret < 0) {
564 ✗ av_log(mux, AV_LOG_ERROR, "Could not write header (incorrect codec "
565 ✗ "parameters ?): %s\n", av_err2str(ret));
566 ✗ return ret;
567 }
568 //assert_avoptions(of->opts);
569 8474 mux->header_written = 1;
570
571 8474 av_dump_format(fc, of->index, fc->url, 1);
572 8474 atomic_fetch_add(&nb_output_dumped, 1);
573
574 8474 return 0;
575 }
576
577 8979 static int bsf_init(MuxStream *ms)
578 {
579 8979 OutputStream *ost = &ms->ost;
580 8979 AVBSFContext *ctx = ms->bsf_ctx;
581 int ret;
582
583
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 8979 if (!ctx)
584 8835 return avcodec_parameters_copy(ost->st->codecpar, ms->par_in);
585
586 144 ret = avcodec_parameters_copy(ctx->par_in, ms->par_in);
587
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 144 if (ret < 0)
588 ✗ return ret;
589
590 144 ctx->time_base_in = ost->st->time_base;
591
592 144 ret = av_bsf_init(ctx);
593
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 144 if (ret < 0) {
594 ✗ av_log(ms, AV_LOG_ERROR, "Error initializing bitstream filter: %s\n",
595 ✗ ctx->filter->name);
596 ✗ return ret;
597 }
598
599 144 ret = avcodec_parameters_copy(ost->st->codecpar, ctx->par_out);
600
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 144 if (ret < 0)
601 ✗ return ret;
602 144 ost->st->time_base = ctx->time_base_out;
603
604 144 ms->bsf_pkt = av_packet_alloc();
605
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 144 if (!ms->bsf_pkt)
606 ✗ return AVERROR(ENOMEM);
607
608 144 return 0;
609 }
610
611 8979 int of_stream_init(OutputFile *of, OutputStream *ost,
612 const AVCodecContext *enc_ctx)
613 {
614 8979 Muxer *mux = mux_from_of(of);
615 8979 MuxStream *ms = ms_from_ost(ost);
616 int ret;
617
618
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 8979 if (enc_ctx) {
619 // use upstream time base unless it has been overridden previously
620
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 8232 if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0)
621 8228 ost->st->time_base = av_add_q(enc_ctx->time_base, (AVRational){0, 1});
622
623 8232 ost->st->avg_frame_rate = enc_ctx->framerate;
624 8232 ost->st->sample_aspect_ratio = enc_ctx->sample_aspect_ratio;
625
626 8232 ret = avcodec_parameters_from_context(ms->par_in, enc_ctx);
627
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 8232 if (ret < 0) {
628 ✗ av_log(ost, AV_LOG_FATAL,
629 "Error initializing the output stream codec parameters.\n");
630 ✗ return ret;
631 }
632 }
633
634 /* initialize bitstream filters for the output stream
635 * needs to be done here, because the codec id for streamcopy is not
636 * known until now */
637 8979 ret = bsf_init(ms);
638
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 8979 if (ret < 0)
639 ✗ return ret;
640
641
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 8979 if (ms->stream_duration) {
642 5951 ost->st->duration = av_rescale_q(ms->stream_duration, ms->stream_duration_tb,
643 5951 ost->st->time_base);
644 }
645
646
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 8979 if (ms->sch_idx >= 0)
647 8978 return sch_mux_stream_ready(mux->sch, of->index, ms->sch_idx);
648
649 1 return 0;
650 }
651
652 8474 static int check_written(OutputFile *of)
653 {
654 8474 int64_t total_packets_written = 0;
655 8474 int pass1_used = 1;
656 8474 int ret = 0;
657
658
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 17453 for (int i = 0; i < of->nb_streams; i++) {
659 8979 OutputStream *ost = of->streams[i];
660 8979 uint64_t packets_written = atomic_load(&ost->packets_written);
661
662 8979 total_packets_written += packets_written;
663
664
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 8979 if (ost->enc &&
665
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 8232 (ost->enc->enc_ctx->flags & (AV_CODEC_FLAG_PASS1 | AV_CODEC_FLAG_PASS2))
666 != AV_CODEC_FLAG_PASS1)
667 8224 pass1_used = 0;
668
669
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 8979 if (!packets_written &&
670
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 56 (abort_on_flags & ABORT_ON_FLAG_EMPTY_OUTPUT_STREAM)) {
671 ✗ av_log(ost, AV_LOG_FATAL, "Empty output stream\n");
672 ✗ ret = err_merge(ret, AVERROR(EINVAL));
673 }
674 }
675
676
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 8474 if (!total_packets_written) {
677 17 int level = AV_LOG_WARNING;
678
679
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 17 if (abort_on_flags & ABORT_ON_FLAG_EMPTY_OUTPUT) {
680 ✗ ret = err_merge(ret, AVERROR(EINVAL));
681 ✗ level = AV_LOG_FATAL;
682 }
683
684
2/2
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 17 av_log(of, level, "Output file is empty, nothing was encoded%s\n",
685 pass1_used ? "" : "(check -ss / -t / -frames parameters if used)");
686 }
687
688 8474 return ret;
689 }
690
691 8474 static void mux_final_stats(Muxer *mux)
692 {
693 8474 OutputFile *of = &mux->of;
694 8474 uint64_t total_packets = 0, total_size = 0;
695 8474 uint64_t video_size = 0, audio_size = 0, subtitle_size = 0,
696 8474 extra_size = 0, other_size = 0;
697
698 8474 uint8_t overhead[16] = "unknown";
699 8474 int64_t file_size = of_filesize(of);
700
701 8474 av_log(of, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
702 of->index, of->url);
703
704
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 17453 for (int j = 0; j < of->nb_streams; j++) {
705 8979 OutputStream *ost = of->streams[j];
706 8979 MuxStream *ms = ms_from_ost(ost);
707 8979 const AVCodecParameters *par = ost->st->codecpar;
708 8979 const enum AVMediaType type = par->codec_type;
709 8979 const uint64_t s = ms->data_size_mux;
710
711
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 8979 switch (type) {
712 7229 case AVMEDIA_TYPE_VIDEO: video_size += s; break;
713 1657 case AVMEDIA_TYPE_AUDIO: audio_size += s; break;
714 80 case AVMEDIA_TYPE_SUBTITLE: subtitle_size += s; break;
715 13 default: other_size += s; break;
716 }
717
718 8979 extra_size += par->extradata_size;
719 8979 total_size += s;
720 8979 total_packets += atomic_load(&ost->packets_written);
721
722 8979 av_log(of, AV_LOG_VERBOSE, " Output stream #%d:%d (%s): ",
723 of->index, j, av_get_media_type_string(type));
724
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 8979 if (ost->enc) {
725 8232 av_log(of, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
726 8232 ost->enc->frames_encoded);
727
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 8232 if (type == AVMEDIA_TYPE_AUDIO)
728 1343 av_log(of, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->enc->samples_encoded);
729 8232 av_log(of, AV_LOG_VERBOSE, "; ");
730 }
731
732 8979 av_log(of, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
733 8979 atomic_load(&ost->packets_written), s);
734
735 8979 av_log(of, AV_LOG_VERBOSE, "\n");
736 }
737
738 8474 av_log(of, AV_LOG_VERBOSE, " Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
739 total_packets, total_size);
740
741
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 8474 if (total_size && file_size > 0 && file_size >= total_size) {
742 6251 snprintf(overhead, sizeof(overhead), "%f%%",
743 6251 100.0 * (file_size - total_size) / total_size);
744 }
745
746 8474 av_log(of, AV_LOG_INFO,
747 "video:%1.0fKiB audio:%1.0fKiB subtitle:%1.0fKiB other streams:%1.0fKiB "
748 "global headers:%1.0fKiB muxing overhead: %s\n",
749 video_size / 1024.0,
750 audio_size / 1024.0,
751 subtitle_size / 1024.0,
752 other_size / 1024.0,
753 extra_size / 1024.0,
754 overhead);
755 8474 }
756
757 8474 int of_write_trailer(OutputFile *of)
758 {
759 8474 Muxer *mux = mux_from_of(of);
760 8474 AVFormatContext *fc = mux->fc;
761 8474 int ret, mux_result = 0;
762
763
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 8474 if (!mux->header_written) {
764 ✗ av_log(mux, AV_LOG_ERROR,
765 "Nothing was written into output file, because "
766 "at least one of its streams received no packets.\n");
767 ✗ return AVERROR(EINVAL);
768 }
769
770 8474 ret = av_write_trailer(fc);
771
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 8474 if (ret < 0) {
772 ✗ av_log(mux, AV_LOG_ERROR, "Error writing trailer: %s\n", av_err2str(ret));
773 ✗ mux_result = err_merge(mux_result, ret);
774 }
775
776 8474 mux->last_filesize = filesize(fc->pb);
777
778
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 8474 if (!(fc->oformat->flags & AVFMT_NOFILE)) {
779 8375 ret = avio_closep(&fc->pb);
780
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 8375 if (ret < 0) {
781 ✗ av_log(mux, AV_LOG_ERROR, "Error closing file: %s\n", av_err2str(ret));
782 ✗ mux_result = err_merge(mux_result, ret);
783 }
784 }
785
786 8474 mux_final_stats(mux);
787
788 // check whether anything was actually written
789 8474 ret = check_written(of);
790 8474 mux_result = err_merge(mux_result, ret);
791
792 8474 return mux_result;
793 }
794
795 26937 static void enc_stats_uninit(EncStats *es)
796 {
797
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 26937 for (int i = 0; i < es->nb_components; i++)
798 ✗ av_freep(&es->components[i].str);
799 26937 av_freep(&es->components);
800
801
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 26937 if (es->lock_initialized)
802 ✗ pthread_mutex_destroy(&es->lock);
803 26937 es->lock_initialized = 0;
804 26937 }
805
806 8979 static void ost_free(OutputStream **post)
807 {
808 8979 OutputStream *ost = *post;
809 MuxStream *ms;
810
811
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 8979 if (!ost)
812 ✗ return;
813 8979 ms = ms_from_ost(ost);
814
815 8979 enc_free(&ost->enc);
816 8979 fg_free(&ost->fg_simple);
817
818
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 8979 if (ost->logfile) {
819
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 8 if (fclose(ost->logfile))
820 ✗ av_log(ms, AV_LOG_ERROR,
821 "Error closing logfile, loss of information possible: %s\n",
822 ✗ av_err2str(AVERROR(errno)));
823 8 ost->logfile = NULL;
824 }
825
826 8979 avcodec_parameters_free(&ms->par_in);
827
828 8979 av_bsf_free(&ms->bsf_ctx);
829 8979 av_packet_free(&ms->bsf_pkt);
830
831 8979 av_packet_free(&ms->pkt);
832
833 8979 av_freep(&ost->kf.pts);
834 8979 av_expr_free(ost->kf.pexpr);
835
836 8979 av_freep(&ost->logfile_prefix);
837
838 8979 av_freep(&ost->attachment_filename);
839
840 8979 enc_stats_uninit(&ost->enc_stats_pre);
841 8979 enc_stats_uninit(&ost->enc_stats_post);
842 8979 enc_stats_uninit(&ms->stats);
843
844 8979 av_freep(post);
845 }
846
847 8474 static void fc_close(AVFormatContext **pfc)
848 {
849 8474 AVFormatContext *fc = *pfc;
850
851
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 8474 if (!fc)
852 ✗ return;
853
854
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 8474 if (!(fc->oformat->flags & AVFMT_NOFILE))
855 8375 avio_closep(&fc->pb);
856 8474 avformat_free_context(fc);
857
858 8474 *pfc = NULL;
859 }
860
861 8474 void of_free(OutputFile **pof)
862 {
863 8474 OutputFile *of = *pof;
864 Muxer *mux;
865
866
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 8474 if (!of)
867 ✗ return;
868 8474 mux = mux_from_of(of);
869
870 8474 sq_free(&mux->sq_mux);
871
872
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 17453 for (int i = 0; i < of->nb_streams; i++)
873 8979 ost_free(&of->streams[i]);
874 8474 av_freep(&of->streams);
875
876 8474 av_freep(&mux->sch_stream_idx);
877
878 8474 av_dict_free(&mux->opts);
879 8474 av_dict_free(&mux->enc_opts_used);
880
881 8474 av_packet_free(&mux->sq_pkt);
882
883 8474 fc_close(&mux->fc);
884
885 8474 av_freep(pof);
886 }
887
888 34876 int64_t of_filesize(OutputFile *of)
889 {
890 34876 Muxer *mux = mux_from_of(of);
891 34876 return atomic_load(&mux->last_filesize);
892 }
893