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2ba45a60 DM |
1 | /* |
2 | * Copyright (c) 2010 Nicolas George | |
3 | * Copyright (c) 2011 Stefano Sabatini | |
4 | * Copyright (c) 2014 Andrey Utkin | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | /** | |
26 | * @file | |
27 | * API example for demuxing, decoding, filtering, encoding and muxing | |
28 | * @example transcoding.c | |
29 | */ | |
30 | ||
31 | #include <libavcodec/avcodec.h> | |
32 | #include <libavformat/avformat.h> | |
33 | #include <libavfilter/avfiltergraph.h> | |
34 | #include <libavfilter/avcodec.h> | |
35 | #include <libavfilter/buffersink.h> | |
36 | #include <libavfilter/buffersrc.h> | |
37 | #include <libavutil/opt.h> | |
38 | #include <libavutil/pixdesc.h> | |
39 | ||
40 | static AVFormatContext *ifmt_ctx; | |
41 | static AVFormatContext *ofmt_ctx; | |
42 | typedef struct FilteringContext { | |
43 | AVFilterContext *buffersink_ctx; | |
44 | AVFilterContext *buffersrc_ctx; | |
45 | AVFilterGraph *filter_graph; | |
46 | } FilteringContext; | |
47 | static FilteringContext *filter_ctx; | |
48 | ||
49 | static int open_input_file(const char *filename) | |
50 | { | |
51 | int ret; | |
52 | unsigned int i; | |
53 | ||
54 | ifmt_ctx = NULL; | |
55 | if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) { | |
56 | av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n"); | |
57 | return ret; | |
58 | } | |
59 | ||
60 | if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) { | |
61 | av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n"); | |
62 | return ret; | |
63 | } | |
64 | ||
65 | for (i = 0; i < ifmt_ctx->nb_streams; i++) { | |
66 | AVStream *stream; | |
67 | AVCodecContext *codec_ctx; | |
68 | stream = ifmt_ctx->streams[i]; | |
69 | codec_ctx = stream->codec; | |
70 | /* Reencode video & audio and remux subtitles etc. */ | |
71 | if (codec_ctx->codec_type == AVMEDIA_TYPE_VIDEO | |
72 | || codec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { | |
73 | /* Open decoder */ | |
74 | ret = avcodec_open2(codec_ctx, | |
75 | avcodec_find_decoder(codec_ctx->codec_id), NULL); | |
76 | if (ret < 0) { | |
77 | av_log(NULL, AV_LOG_ERROR, "Failed to open decoder for stream #%u\n", i); | |
78 | return ret; | |
79 | } | |
80 | } | |
81 | } | |
82 | ||
83 | av_dump_format(ifmt_ctx, 0, filename, 0); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static int open_output_file(const char *filename) | |
88 | { | |
89 | AVStream *out_stream; | |
90 | AVStream *in_stream; | |
91 | AVCodecContext *dec_ctx, *enc_ctx; | |
92 | AVCodec *encoder; | |
93 | int ret; | |
94 | unsigned int i; | |
95 | ||
96 | ofmt_ctx = NULL; | |
97 | avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename); | |
98 | if (!ofmt_ctx) { | |
99 | av_log(NULL, AV_LOG_ERROR, "Could not create output context\n"); | |
100 | return AVERROR_UNKNOWN; | |
101 | } | |
102 | ||
103 | ||
104 | for (i = 0; i < ifmt_ctx->nb_streams; i++) { | |
105 | out_stream = avformat_new_stream(ofmt_ctx, NULL); | |
106 | if (!out_stream) { | |
107 | av_log(NULL, AV_LOG_ERROR, "Failed allocating output stream\n"); | |
108 | return AVERROR_UNKNOWN; | |
109 | } | |
110 | ||
111 | in_stream = ifmt_ctx->streams[i]; | |
112 | dec_ctx = in_stream->codec; | |
113 | enc_ctx = out_stream->codec; | |
114 | ||
115 | if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO | |
116 | || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { | |
117 | /* in this example, we choose transcoding to same codec */ | |
118 | encoder = avcodec_find_encoder(dec_ctx->codec_id); | |
dcebb6f3 DM |
119 | if (!encoder) { |
120 | av_log(NULL, AV_LOG_FATAL, "Neccessary encoder not found\n"); | |
121 | return AVERROR_INVALIDDATA; | |
122 | } | |
2ba45a60 DM |
123 | |
124 | /* In this example, we transcode to same properties (picture size, | |
125 | * sample rate etc.). These properties can be changed for output | |
126 | * streams easily using filters */ | |
127 | if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { | |
128 | enc_ctx->height = dec_ctx->height; | |
129 | enc_ctx->width = dec_ctx->width; | |
130 | enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio; | |
131 | /* take first format from list of supported formats */ | |
132 | enc_ctx->pix_fmt = encoder->pix_fmts[0]; | |
133 | /* video time_base can be set to whatever is handy and supported by encoder */ | |
134 | enc_ctx->time_base = dec_ctx->time_base; | |
135 | } else { | |
136 | enc_ctx->sample_rate = dec_ctx->sample_rate; | |
137 | enc_ctx->channel_layout = dec_ctx->channel_layout; | |
138 | enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); | |
139 | /* take first format from list of supported formats */ | |
140 | enc_ctx->sample_fmt = encoder->sample_fmts[0]; | |
141 | enc_ctx->time_base = (AVRational){1, enc_ctx->sample_rate}; | |
142 | } | |
143 | ||
144 | /* Third parameter can be used to pass settings to encoder */ | |
145 | ret = avcodec_open2(enc_ctx, encoder, NULL); | |
146 | if (ret < 0) { | |
147 | av_log(NULL, AV_LOG_ERROR, "Cannot open video encoder for stream #%u\n", i); | |
148 | return ret; | |
149 | } | |
150 | } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) { | |
151 | av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is of unknown type, cannot proceed\n", i); | |
152 | return AVERROR_INVALIDDATA; | |
153 | } else { | |
154 | /* if this stream must be remuxed */ | |
155 | ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec, | |
156 | ifmt_ctx->streams[i]->codec); | |
157 | if (ret < 0) { | |
158 | av_log(NULL, AV_LOG_ERROR, "Copying stream context failed\n"); | |
159 | return ret; | |
160 | } | |
161 | } | |
162 | ||
163 | if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) | |
164 | enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER; | |
165 | ||
166 | } | |
167 | av_dump_format(ofmt_ctx, 0, filename, 1); | |
168 | ||
169 | if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) { | |
170 | ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE); | |
171 | if (ret < 0) { | |
172 | av_log(NULL, AV_LOG_ERROR, "Could not open output file '%s'", filename); | |
173 | return ret; | |
174 | } | |
175 | } | |
176 | ||
177 | /* init muxer, write output file header */ | |
178 | ret = avformat_write_header(ofmt_ctx, NULL); | |
179 | if (ret < 0) { | |
180 | av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output file\n"); | |
181 | return ret; | |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx, | |
188 | AVCodecContext *enc_ctx, const char *filter_spec) | |
189 | { | |
190 | char args[512]; | |
191 | int ret = 0; | |
192 | AVFilter *buffersrc = NULL; | |
193 | AVFilter *buffersink = NULL; | |
194 | AVFilterContext *buffersrc_ctx = NULL; | |
195 | AVFilterContext *buffersink_ctx = NULL; | |
196 | AVFilterInOut *outputs = avfilter_inout_alloc(); | |
197 | AVFilterInOut *inputs = avfilter_inout_alloc(); | |
198 | AVFilterGraph *filter_graph = avfilter_graph_alloc(); | |
199 | ||
200 | if (!outputs || !inputs || !filter_graph) { | |
201 | ret = AVERROR(ENOMEM); | |
202 | goto end; | |
203 | } | |
204 | ||
205 | if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { | |
206 | buffersrc = avfilter_get_by_name("buffer"); | |
207 | buffersink = avfilter_get_by_name("buffersink"); | |
208 | if (!buffersrc || !buffersink) { | |
209 | av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); | |
210 | ret = AVERROR_UNKNOWN; | |
211 | goto end; | |
212 | } | |
213 | ||
214 | snprintf(args, sizeof(args), | |
215 | "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", | |
216 | dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt, | |
217 | dec_ctx->time_base.num, dec_ctx->time_base.den, | |
218 | dec_ctx->sample_aspect_ratio.num, | |
219 | dec_ctx->sample_aspect_ratio.den); | |
220 | ||
221 | ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", | |
222 | args, NULL, filter_graph); | |
223 | if (ret < 0) { | |
224 | av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n"); | |
225 | goto end; | |
226 | } | |
227 | ||
228 | ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", | |
229 | NULL, NULL, filter_graph); | |
230 | if (ret < 0) { | |
231 | av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n"); | |
232 | goto end; | |
233 | } | |
234 | ||
235 | ret = av_opt_set_bin(buffersink_ctx, "pix_fmts", | |
236 | (uint8_t*)&enc_ctx->pix_fmt, sizeof(enc_ctx->pix_fmt), | |
237 | AV_OPT_SEARCH_CHILDREN); | |
238 | if (ret < 0) { | |
239 | av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel format\n"); | |
240 | goto end; | |
241 | } | |
242 | } else if (dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { | |
243 | buffersrc = avfilter_get_by_name("abuffer"); | |
244 | buffersink = avfilter_get_by_name("abuffersink"); | |
245 | if (!buffersrc || !buffersink) { | |
246 | av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); | |
247 | ret = AVERROR_UNKNOWN; | |
248 | goto end; | |
249 | } | |
250 | ||
251 | if (!dec_ctx->channel_layout) | |
252 | dec_ctx->channel_layout = | |
253 | av_get_default_channel_layout(dec_ctx->channels); | |
254 | snprintf(args, sizeof(args), | |
255 | "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64, | |
256 | dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->sample_rate, | |
257 | av_get_sample_fmt_name(dec_ctx->sample_fmt), | |
258 | dec_ctx->channel_layout); | |
259 | ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", | |
260 | args, NULL, filter_graph); | |
261 | if (ret < 0) { | |
262 | av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n"); | |
263 | goto end; | |
264 | } | |
265 | ||
266 | ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", | |
267 | NULL, NULL, filter_graph); | |
268 | if (ret < 0) { | |
269 | av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n"); | |
270 | goto end; | |
271 | } | |
272 | ||
273 | ret = av_opt_set_bin(buffersink_ctx, "sample_fmts", | |
274 | (uint8_t*)&enc_ctx->sample_fmt, sizeof(enc_ctx->sample_fmt), | |
275 | AV_OPT_SEARCH_CHILDREN); | |
276 | if (ret < 0) { | |
277 | av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n"); | |
278 | goto end; | |
279 | } | |
280 | ||
281 | ret = av_opt_set_bin(buffersink_ctx, "channel_layouts", | |
282 | (uint8_t*)&enc_ctx->channel_layout, | |
283 | sizeof(enc_ctx->channel_layout), AV_OPT_SEARCH_CHILDREN); | |
284 | if (ret < 0) { | |
285 | av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n"); | |
286 | goto end; | |
287 | } | |
288 | ||
289 | ret = av_opt_set_bin(buffersink_ctx, "sample_rates", | |
290 | (uint8_t*)&enc_ctx->sample_rate, sizeof(enc_ctx->sample_rate), | |
291 | AV_OPT_SEARCH_CHILDREN); | |
292 | if (ret < 0) { | |
293 | av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n"); | |
294 | goto end; | |
295 | } | |
296 | } else { | |
297 | ret = AVERROR_UNKNOWN; | |
298 | goto end; | |
299 | } | |
300 | ||
301 | /* Endpoints for the filter graph. */ | |
302 | outputs->name = av_strdup("in"); | |
303 | outputs->filter_ctx = buffersrc_ctx; | |
304 | outputs->pad_idx = 0; | |
305 | outputs->next = NULL; | |
306 | ||
307 | inputs->name = av_strdup("out"); | |
308 | inputs->filter_ctx = buffersink_ctx; | |
309 | inputs->pad_idx = 0; | |
310 | inputs->next = NULL; | |
311 | ||
312 | if (!outputs->name || !inputs->name) { | |
313 | ret = AVERROR(ENOMEM); | |
314 | goto end; | |
315 | } | |
316 | ||
317 | if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_spec, | |
318 | &inputs, &outputs, NULL)) < 0) | |
319 | goto end; | |
320 | ||
321 | if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0) | |
322 | goto end; | |
323 | ||
324 | /* Fill FilteringContext */ | |
325 | fctx->buffersrc_ctx = buffersrc_ctx; | |
326 | fctx->buffersink_ctx = buffersink_ctx; | |
327 | fctx->filter_graph = filter_graph; | |
328 | ||
329 | end: | |
330 | avfilter_inout_free(&inputs); | |
331 | avfilter_inout_free(&outputs); | |
332 | ||
333 | return ret; | |
334 | } | |
335 | ||
336 | static int init_filters(void) | |
337 | { | |
338 | const char *filter_spec; | |
339 | unsigned int i; | |
340 | int ret; | |
341 | filter_ctx = av_malloc_array(ifmt_ctx->nb_streams, sizeof(*filter_ctx)); | |
342 | if (!filter_ctx) | |
343 | return AVERROR(ENOMEM); | |
344 | ||
345 | for (i = 0; i < ifmt_ctx->nb_streams; i++) { | |
346 | filter_ctx[i].buffersrc_ctx = NULL; | |
347 | filter_ctx[i].buffersink_ctx = NULL; | |
348 | filter_ctx[i].filter_graph = NULL; | |
349 | if (!(ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO | |
350 | || ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)) | |
351 | continue; | |
352 | ||
353 | ||
354 | if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
355 | filter_spec = "null"; /* passthrough (dummy) filter for video */ | |
356 | else | |
357 | filter_spec = "anull"; /* passthrough (dummy) filter for audio */ | |
358 | ret = init_filter(&filter_ctx[i], ifmt_ctx->streams[i]->codec, | |
359 | ofmt_ctx->streams[i]->codec, filter_spec); | |
360 | if (ret) | |
361 | return ret; | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) { | |
367 | int ret; | |
368 | int got_frame_local; | |
369 | AVPacket enc_pkt; | |
370 | int (*enc_func)(AVCodecContext *, AVPacket *, const AVFrame *, int *) = | |
371 | (ifmt_ctx->streams[stream_index]->codec->codec_type == | |
372 | AVMEDIA_TYPE_VIDEO) ? avcodec_encode_video2 : avcodec_encode_audio2; | |
373 | ||
374 | if (!got_frame) | |
375 | got_frame = &got_frame_local; | |
376 | ||
377 | av_log(NULL, AV_LOG_INFO, "Encoding frame\n"); | |
378 | /* encode filtered frame */ | |
379 | enc_pkt.data = NULL; | |
380 | enc_pkt.size = 0; | |
381 | av_init_packet(&enc_pkt); | |
382 | ret = enc_func(ofmt_ctx->streams[stream_index]->codec, &enc_pkt, | |
383 | filt_frame, got_frame); | |
384 | av_frame_free(&filt_frame); | |
385 | if (ret < 0) | |
386 | return ret; | |
387 | if (!(*got_frame)) | |
388 | return 0; | |
389 | ||
390 | /* prepare packet for muxing */ | |
391 | enc_pkt.stream_index = stream_index; | |
f6fa7814 DM |
392 | av_packet_rescale_ts(&enc_pkt, |
393 | ofmt_ctx->streams[stream_index]->codec->time_base, | |
394 | ofmt_ctx->streams[stream_index]->time_base); | |
2ba45a60 DM |
395 | |
396 | av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n"); | |
397 | /* mux encoded frame */ | |
398 | ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt); | |
399 | return ret; | |
400 | } | |
401 | ||
402 | static int filter_encode_write_frame(AVFrame *frame, unsigned int stream_index) | |
403 | { | |
404 | int ret; | |
405 | AVFrame *filt_frame; | |
406 | ||
407 | av_log(NULL, AV_LOG_INFO, "Pushing decoded frame to filters\n"); | |
408 | /* push the decoded frame into the filtergraph */ | |
409 | ret = av_buffersrc_add_frame_flags(filter_ctx[stream_index].buffersrc_ctx, | |
410 | frame, 0); | |
411 | if (ret < 0) { | |
412 | av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n"); | |
413 | return ret; | |
414 | } | |
415 | ||
416 | /* pull filtered frames from the filtergraph */ | |
417 | while (1) { | |
418 | filt_frame = av_frame_alloc(); | |
419 | if (!filt_frame) { | |
420 | ret = AVERROR(ENOMEM); | |
421 | break; | |
422 | } | |
423 | av_log(NULL, AV_LOG_INFO, "Pulling filtered frame from filters\n"); | |
424 | ret = av_buffersink_get_frame(filter_ctx[stream_index].buffersink_ctx, | |
425 | filt_frame); | |
426 | if (ret < 0) { | |
427 | /* if no more frames for output - returns AVERROR(EAGAIN) | |
428 | * if flushed and no more frames for output - returns AVERROR_EOF | |
429 | * rewrite retcode to 0 to show it as normal procedure completion | |
430 | */ | |
431 | if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) | |
432 | ret = 0; | |
433 | av_frame_free(&filt_frame); | |
434 | break; | |
435 | } | |
436 | ||
437 | filt_frame->pict_type = AV_PICTURE_TYPE_NONE; | |
438 | ret = encode_write_frame(filt_frame, stream_index, NULL); | |
439 | if (ret < 0) | |
440 | break; | |
441 | } | |
442 | ||
443 | return ret; | |
444 | } | |
445 | ||
446 | static int flush_encoder(unsigned int stream_index) | |
447 | { | |
448 | int ret; | |
449 | int got_frame; | |
450 | ||
451 | if (!(ofmt_ctx->streams[stream_index]->codec->codec->capabilities & | |
452 | CODEC_CAP_DELAY)) | |
453 | return 0; | |
454 | ||
455 | while (1) { | |
456 | av_log(NULL, AV_LOG_INFO, "Flushing stream #%u encoder\n", stream_index); | |
457 | ret = encode_write_frame(NULL, stream_index, &got_frame); | |
458 | if (ret < 0) | |
459 | break; | |
460 | if (!got_frame) | |
461 | return 0; | |
462 | } | |
463 | return ret; | |
464 | } | |
465 | ||
466 | int main(int argc, char **argv) | |
467 | { | |
468 | int ret; | |
469 | AVPacket packet = { .data = NULL, .size = 0 }; | |
470 | AVFrame *frame = NULL; | |
471 | enum AVMediaType type; | |
472 | unsigned int stream_index; | |
473 | unsigned int i; | |
474 | int got_frame; | |
475 | int (*dec_func)(AVCodecContext *, AVFrame *, int *, const AVPacket *); | |
476 | ||
477 | if (argc != 3) { | |
478 | av_log(NULL, AV_LOG_ERROR, "Usage: %s <input file> <output file>\n", argv[0]); | |
479 | return 1; | |
480 | } | |
481 | ||
482 | av_register_all(); | |
483 | avfilter_register_all(); | |
484 | ||
485 | if ((ret = open_input_file(argv[1])) < 0) | |
486 | goto end; | |
487 | if ((ret = open_output_file(argv[2])) < 0) | |
488 | goto end; | |
489 | if ((ret = init_filters()) < 0) | |
490 | goto end; | |
491 | ||
492 | /* read all packets */ | |
493 | while (1) { | |
494 | if ((ret = av_read_frame(ifmt_ctx, &packet)) < 0) | |
495 | break; | |
496 | stream_index = packet.stream_index; | |
497 | type = ifmt_ctx->streams[packet.stream_index]->codec->codec_type; | |
498 | av_log(NULL, AV_LOG_DEBUG, "Demuxer gave frame of stream_index %u\n", | |
499 | stream_index); | |
500 | ||
501 | if (filter_ctx[stream_index].filter_graph) { | |
502 | av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n"); | |
503 | frame = av_frame_alloc(); | |
504 | if (!frame) { | |
505 | ret = AVERROR(ENOMEM); | |
506 | break; | |
507 | } | |
f6fa7814 DM |
508 | av_packet_rescale_ts(&packet, |
509 | ifmt_ctx->streams[stream_index]->time_base, | |
510 | ifmt_ctx->streams[stream_index]->codec->time_base); | |
2ba45a60 DM |
511 | dec_func = (type == AVMEDIA_TYPE_VIDEO) ? avcodec_decode_video2 : |
512 | avcodec_decode_audio4; | |
513 | ret = dec_func(ifmt_ctx->streams[stream_index]->codec, frame, | |
514 | &got_frame, &packet); | |
515 | if (ret < 0) { | |
516 | av_frame_free(&frame); | |
517 | av_log(NULL, AV_LOG_ERROR, "Decoding failed\n"); | |
518 | break; | |
519 | } | |
520 | ||
521 | if (got_frame) { | |
522 | frame->pts = av_frame_get_best_effort_timestamp(frame); | |
523 | ret = filter_encode_write_frame(frame, stream_index); | |
524 | av_frame_free(&frame); | |
525 | if (ret < 0) | |
526 | goto end; | |
527 | } else { | |
528 | av_frame_free(&frame); | |
529 | } | |
530 | } else { | |
531 | /* remux this frame without reencoding */ | |
f6fa7814 DM |
532 | av_packet_rescale_ts(&packet, |
533 | ifmt_ctx->streams[stream_index]->time_base, | |
534 | ofmt_ctx->streams[stream_index]->time_base); | |
2ba45a60 DM |
535 | |
536 | ret = av_interleaved_write_frame(ofmt_ctx, &packet); | |
537 | if (ret < 0) | |
538 | goto end; | |
539 | } | |
540 | av_free_packet(&packet); | |
541 | } | |
542 | ||
543 | /* flush filters and encoders */ | |
544 | for (i = 0; i < ifmt_ctx->nb_streams; i++) { | |
545 | /* flush filter */ | |
546 | if (!filter_ctx[i].filter_graph) | |
547 | continue; | |
548 | ret = filter_encode_write_frame(NULL, i); | |
549 | if (ret < 0) { | |
550 | av_log(NULL, AV_LOG_ERROR, "Flushing filter failed\n"); | |
551 | goto end; | |
552 | } | |
553 | ||
554 | /* flush encoder */ | |
555 | ret = flush_encoder(i); | |
556 | if (ret < 0) { | |
557 | av_log(NULL, AV_LOG_ERROR, "Flushing encoder failed\n"); | |
558 | goto end; | |
559 | } | |
560 | } | |
561 | ||
562 | av_write_trailer(ofmt_ctx); | |
563 | end: | |
564 | av_free_packet(&packet); | |
565 | av_frame_free(&frame); | |
566 | for (i = 0; i < ifmt_ctx->nb_streams; i++) { | |
567 | avcodec_close(ifmt_ctx->streams[i]->codec); | |
568 | if (ofmt_ctx && ofmt_ctx->nb_streams > i && ofmt_ctx->streams[i] && ofmt_ctx->streams[i]->codec) | |
569 | avcodec_close(ofmt_ctx->streams[i]->codec); | |
570 | if (filter_ctx && filter_ctx[i].filter_graph) | |
571 | avfilter_graph_free(&filter_ctx[i].filter_graph); | |
572 | } | |
573 | av_free(filter_ctx); | |
574 | avformat_close_input(&ifmt_ctx); | |
575 | if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) | |
576 | avio_close(ofmt_ctx->pb); | |
577 | avformat_free_context(ofmt_ctx); | |
578 | ||
579 | if (ret < 0) | |
580 | av_log(NULL, AV_LOG_ERROR, "Error occurred: %s\n", av_err2str(ret)); | |
581 | ||
582 | return ret ? 1 : 0; | |
583 | } |