| @@ -0,0 +1,597 @@ |
| 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 doc/examples/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); |
| 119 | + |
| 120 | + /* In this example, we transcode to same properties (picture size, |
| 121 | + * sample rate etc.). These properties can be changed for output |
| 122 | + * streams easily using filters */ |
| 123 | + if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 124 | + enc_ctx->height = dec_ctx->height; |
| 125 | + enc_ctx->width = dec_ctx->width; |
| 126 | + enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio; |
| 127 | + /* take first format from list of supported formats */ |
| 128 | + enc_ctx->pix_fmt = encoder->pix_fmts[0]; |
| 129 | + /* video time_base can be set to whatever is handy and supported by encoder */ |
| 130 | + enc_ctx->time_base = dec_ctx->time_base; |
| 131 | + } else { |
| 132 | + enc_ctx->sample_rate = dec_ctx->sample_rate; |
| 133 | + enc_ctx->channel_layout = dec_ctx->channel_layout; |
| 134 | + enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); |
| 135 | + /* take first format from list of supported formats */ |
| 136 | + enc_ctx->sample_fmt = encoder->sample_fmts[0]; |
| 137 | + enc_ctx->time_base = (AVRational){1, enc_ctx->sample_rate}; |
| 138 | + } |
| 139 | + |
| 140 | + /* Third parameter can be used to pass settings to encoder */ |
| 141 | + ret = avcodec_open2(enc_ctx, encoder, NULL); |
| 142 | + if (ret < 0) { |
| 143 | + av_log(NULL, AV_LOG_ERROR, "Cannot open video encoder for stream #%u\n", i); |
| 144 | + return ret; |
| 145 | + } |
| 146 | + } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) { |
| 147 | + av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is of unknown type, cannot proceed\n", i); |
| 148 | + return AVERROR_INVALIDDATA; |
| 149 | + } else { |
| 150 | + /* if this stream must be remuxed */ |
| 151 | + ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec, |
| 152 | + ifmt_ctx->streams[i]->codec); |
| 153 | + if (ret < 0) { |
| 154 | + av_log(NULL, AV_LOG_ERROR, "Copying stream context failed\n"); |
| 155 | + return ret; |
| 156 | + } |
| 157 | + } |
| 158 | + |
| 159 | + if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) |
| 160 | + enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER; |
| 161 | + |
| 162 | + } |
| 163 | + av_dump_format(ofmt_ctx, 0, filename, 1); |
| 164 | + |
| 165 | + if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) { |
| 166 | + ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE); |
| 167 | + if (ret < 0) { |
| 168 | + av_log(NULL, AV_LOG_ERROR, "Could not open output file '%s'", filename); |
| 169 | + return ret; |
| 170 | + } |
| 171 | + } |
| 172 | + |
| 173 | + /* init muxer, write output file header */ |
| 174 | + ret = avformat_write_header(ofmt_ctx, NULL); |
| 175 | + if (ret < 0) { |
| 176 | + av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output file\n"); |
| 177 | + return ret; |
| 178 | + } |
| 179 | + |
| 180 | + return 0; |
| 181 | +} |
| 182 | + |
| 183 | +static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx, |
| 184 | + AVCodecContext *enc_ctx, const char *filter_spec) |
| 185 | +{ |
| 186 | + char args[512]; |
| 187 | + int ret = 0; |
| 188 | + AVFilter *buffersrc = NULL; |
| 189 | + AVFilter *buffersink = NULL; |
| 190 | + AVFilterContext *buffersrc_ctx = NULL; |
| 191 | + AVFilterContext *buffersink_ctx = NULL; |
| 192 | + AVFilterInOut *outputs = avfilter_inout_alloc(); |
| 193 | + AVFilterInOut *inputs = avfilter_inout_alloc(); |
| 194 | + AVFilterGraph *filter_graph = avfilter_graph_alloc(); |
| 195 | + |
| 196 | + if (!outputs || !inputs || !filter_graph) { |
| 197 | + ret = AVERROR(ENOMEM); |
| 198 | + goto end; |
| 199 | + } |
| 200 | + |
| 201 | + if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 202 | + buffersrc = avfilter_get_by_name("buffer"); |
| 203 | + buffersink = avfilter_get_by_name("buffersink"); |
| 204 | + if (!buffersrc || !buffersink) { |
| 205 | + av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); |
| 206 | + ret = AVERROR_UNKNOWN; |
| 207 | + goto end; |
| 208 | + } |
| 209 | + |
| 210 | + snprintf(args, sizeof(args), |
| 211 | + "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", |
| 212 | + dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt, |
| 213 | + dec_ctx->time_base.num, dec_ctx->time_base.den, |
| 214 | + dec_ctx->sample_aspect_ratio.num, |
| 215 | + dec_ctx->sample_aspect_ratio.den); |
| 216 | + |
| 217 | + ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", |
| 218 | + args, NULL, filter_graph); |
| 219 | + if (ret < 0) { |
| 220 | + av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n"); |
| 221 | + goto end; |
| 222 | + } |
| 223 | + |
| 224 | + ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", |
| 225 | + NULL, NULL, filter_graph); |
| 226 | + if (ret < 0) { |
| 227 | + av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n"); |
| 228 | + goto end; |
| 229 | + } |
| 230 | + |
| 231 | + ret = av_opt_set_bin(buffersink_ctx, "pix_fmts", |
| 232 | + (uint8_t*)&enc_ctx->pix_fmt, sizeof(enc_ctx->pix_fmt), |
| 233 | + AV_OPT_SEARCH_CHILDREN); |
| 234 | + if (ret < 0) { |
| 235 | + av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel format\n"); |
| 236 | + goto end; |
| 237 | + } |
| 238 | + } else if (dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 239 | + buffersrc = avfilter_get_by_name("abuffer"); |
| 240 | + buffersink = avfilter_get_by_name("abuffersink"); |
| 241 | + if (!buffersrc || !buffersink) { |
| 242 | + av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); |
| 243 | + ret = AVERROR_UNKNOWN; |
| 244 | + goto end; |
| 245 | + } |
| 246 | + |
| 247 | + if (!dec_ctx->channel_layout) |
| 248 | + dec_ctx->channel_layout = |
| 249 | + av_get_default_channel_layout(dec_ctx->channels); |
| 250 | + snprintf(args, sizeof(args), |
| 251 | + "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64, |
| 252 | + dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->sample_rate, |
| 253 | + av_get_sample_fmt_name(dec_ctx->sample_fmt), |
| 254 | + dec_ctx->channel_layout); |
| 255 | + ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", |
| 256 | + args, NULL, filter_graph); |
| 257 | + if (ret < 0) { |
| 258 | + av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n"); |
| 259 | + goto end; |
| 260 | + } |
| 261 | + |
| 262 | + ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", |
| 263 | + NULL, NULL, filter_graph); |
| 264 | + if (ret < 0) { |
| 265 | + av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n"); |
| 266 | + goto end; |
| 267 | + } |
| 268 | + |
| 269 | + ret = av_opt_set_bin(buffersink_ctx, "sample_fmts", |
| 270 | + (uint8_t*)&enc_ctx->sample_fmt, sizeof(enc_ctx->sample_fmt), |
| 271 | + AV_OPT_SEARCH_CHILDREN); |
| 272 | + if (ret < 0) { |
| 273 | + av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n"); |
| 274 | + goto end; |
| 275 | + } |
| 276 | + |
| 277 | + ret = av_opt_set_bin(buffersink_ctx, "channel_layouts", |
| 278 | + (uint8_t*)&enc_ctx->channel_layout, |
| 279 | + sizeof(enc_ctx->channel_layout), AV_OPT_SEARCH_CHILDREN); |
| 280 | + if (ret < 0) { |
| 281 | + av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n"); |
| 282 | + goto end; |
| 283 | + } |
| 284 | + |
| 285 | + ret = av_opt_set_bin(buffersink_ctx, "sample_rates", |
| 286 | + (uint8_t*)&enc_ctx->sample_rate, sizeof(enc_ctx->sample_rate), |
| 287 | + AV_OPT_SEARCH_CHILDREN); |
| 288 | + if (ret < 0) { |
| 289 | + av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n"); |
| 290 | + goto end; |
| 291 | + } |
| 292 | + } else { |
| 293 | + ret = AVERROR_UNKNOWN; |
| 294 | + goto end; |
| 295 | + } |
| 296 | + |
| 297 | + /* Endpoints for the filter graph. */ |
| 298 | + outputs->name = av_strdup("in"); |
| 299 | + outputs->filter_ctx = buffersrc_ctx; |
| 300 | + outputs->pad_idx = 0; |
| 301 | + outputs->next = NULL; |
| 302 | + |
| 303 | + inputs->name = av_strdup("out"); |
| 304 | + inputs->filter_ctx = buffersink_ctx; |
| 305 | + inputs->pad_idx = 0; |
| 306 | + inputs->next = NULL; |
| 307 | + |
| 308 | + if (!outputs->name || !inputs->name) { |
| 309 | + ret = AVERROR(ENOMEM); |
| 310 | + goto end; |
| 311 | + } |
| 312 | + |
| 313 | + if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_spec, |
| 314 | + &inputs, &outputs, NULL)) < 0) |
| 315 | + goto end; |
| 316 | + |
| 317 | + if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0) |
| 318 | + goto end; |
| 319 | + |
| 320 | + /* Fill FilteringContext */ |
| 321 | + fctx->buffersrc_ctx = buffersrc_ctx; |
| 322 | + fctx->buffersink_ctx = buffersink_ctx; |
| 323 | + fctx->filter_graph = filter_graph; |
| 324 | + |
| 325 | +end: |
| 326 | + avfilter_inout_free(&inputs); |
| 327 | + avfilter_inout_free(&outputs); |
| 328 | + |
| 329 | + return ret; |
| 330 | +} |
| 331 | + |
| 332 | +static int init_filters(void) |
| 333 | +{ |
| 334 | + const char *filter_spec; |
| 335 | + unsigned int i; |
| 336 | + int ret; |
| 337 | + filter_ctx = av_malloc(sizeof(FilteringContext) * ifmt_ctx->nb_streams); |
| 338 | + if (!filter_ctx) |
| 339 | + return AVERROR(ENOMEM); |
| 340 | + |
| 341 | + for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
| 342 | + filter_ctx[i].buffersrc_ctx = NULL; |
| 343 | + filter_ctx[i].buffersink_ctx = NULL; |
| 344 | + filter_ctx[i].filter_graph = NULL; |
| 345 | + if (!(ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO |
| 346 | + || ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)) |
| 347 | + continue; |
| 348 | + |
| 349 | + |
| 350 | + if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 351 | + filter_spec = "null"; /* passthrough (dummy) filter for video */ |
| 352 | + else |
| 353 | + filter_spec = "anull"; /* passthrough (dummy) filter for audio */ |
| 354 | + ret = init_filter(&filter_ctx[i], ifmt_ctx->streams[i]->codec, |
| 355 | + ofmt_ctx->streams[i]->codec, filter_spec); |
| 356 | + if (ret) |
| 357 | + return ret; |
| 358 | + } |
| 359 | + return 0; |
| 360 | +} |
| 361 | + |
| 362 | +static int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) { |
| 363 | + int ret; |
| 364 | + int got_frame_local; |
| 365 | + AVPacket enc_pkt; |
| 366 | + int (*enc_func)(AVCodecContext *, AVPacket *, const AVFrame *, int *) = |
| 367 | + (ifmt_ctx->streams[stream_index]->codec->codec_type == |
| 368 | + AVMEDIA_TYPE_VIDEO) ? avcodec_encode_video2 : avcodec_encode_audio2; |
| 369 | + |
| 370 | + if (!got_frame) |
| 371 | + got_frame = &got_frame_local; |
| 372 | + |
| 373 | + av_log(NULL, AV_LOG_INFO, "Encoding frame\n"); |
| 374 | + /* encode filtered frame */ |
| 375 | + enc_pkt.data = NULL; |
| 376 | + enc_pkt.size = 0; |
| 377 | + av_init_packet(&enc_pkt); |
| 378 | + ret = enc_func(ofmt_ctx->streams[stream_index]->codec, &enc_pkt, |
| 379 | + filt_frame, got_frame); |
| 380 | + av_frame_free(&filt_frame); |
| 381 | + if (ret < 0) |
| 382 | + return ret; |
| 383 | + if (!(*got_frame)) |
| 384 | + return 0; |
| 385 | + |
| 386 | + /* prepare packet for muxing */ |
| 387 | + enc_pkt.stream_index = stream_index; |
| 388 | + enc_pkt.dts = av_rescale_q_rnd(enc_pkt.dts, |
| 389 | + ofmt_ctx->streams[stream_index]->codec->time_base, |
| 390 | + ofmt_ctx->streams[stream_index]->time_base, |
| 391 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 392 | + enc_pkt.pts = av_rescale_q_rnd(enc_pkt.pts, |
| 393 | + ofmt_ctx->streams[stream_index]->codec->time_base, |
| 394 | + ofmt_ctx->streams[stream_index]->time_base, |
| 395 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 396 | + enc_pkt.duration = av_rescale_q(enc_pkt.duration, |
| 397 | + ofmt_ctx->streams[stream_index]->codec->time_base, |
| 398 | + ofmt_ctx->streams[stream_index]->time_base); |
| 399 | + |
| 400 | + av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n"); |
| 401 | + /* mux encoded frame */ |
| 402 | + ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt); |
| 403 | + return ret; |
| 404 | +} |
| 405 | + |
| 406 | +static int filter_encode_write_frame(AVFrame *frame, unsigned int stream_index) |
| 407 | +{ |
| 408 | + int ret; |
| 409 | + AVFrame *filt_frame; |
| 410 | + |
| 411 | + av_log(NULL, AV_LOG_INFO, "Pushing decoded frame to filters\n"); |
| 412 | + /* push the decoded frame into the filtergraph */ |
| 413 | + ret = av_buffersrc_add_frame_flags(filter_ctx[stream_index].buffersrc_ctx, |
| 414 | + frame, 0); |
| 415 | + if (ret < 0) { |
| 416 | + av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n"); |
| 417 | + return ret; |
| 418 | + } |
| 419 | + |
| 420 | + /* pull filtered frames from the filtergraph */ |
| 421 | + while (1) { |
| 422 | + filt_frame = av_frame_alloc(); |
| 423 | + if (!filt_frame) { |
| 424 | + ret = AVERROR(ENOMEM); |
| 425 | + break; |
| 426 | + } |
| 427 | + av_log(NULL, AV_LOG_INFO, "Pulling filtered frame from filters\n"); |
| 428 | + ret = av_buffersink_get_frame(filter_ctx[stream_index].buffersink_ctx, |
| 429 | + filt_frame); |
| 430 | + if (ret < 0) { |
| 431 | + /* if no more frames for output - returns AVERROR(EAGAIN) |
| 432 | + * if flushed and no more frames for output - returns AVERROR_EOF |
| 433 | + * rewrite retcode to 0 to show it as normal procedure completion |
| 434 | + */ |
| 435 | + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) |
| 436 | + ret = 0; |
| 437 | + av_frame_free(&filt_frame); |
| 438 | + break; |
| 439 | + } |
| 440 | + |
| 441 | + filt_frame->pict_type = AV_PICTURE_TYPE_NONE; |
| 442 | + ret = encode_write_frame(filt_frame, stream_index, NULL); |
| 443 | + if (ret < 0) |
| 444 | + break; |
| 445 | + } |
| 446 | + |
| 447 | + return ret; |
| 448 | +} |
| 449 | + |
| 450 | +static int flush_encoder(unsigned int stream_index) |
| 451 | +{ |
| 452 | + int ret; |
| 453 | + int got_frame; |
| 454 | + |
| 455 | + if (!(ofmt_ctx->streams[stream_index]->codec->codec->capabilities & |
| 456 | + CODEC_CAP_DELAY)) |
| 457 | + return 0; |
| 458 | + |
| 459 | + while (1) { |
| 460 | + av_log(NULL, AV_LOG_INFO, "Flushing stream #%u encoder\n", stream_index); |
| 461 | + ret = encode_write_frame(NULL, stream_index, &got_frame); |
| 462 | + if (ret < 0) |
| 463 | + break; |
| 464 | + if (!got_frame) |
| 465 | + return 0; |
| 466 | + } |
| 467 | + return ret; |
| 468 | +} |
| 469 | + |
| 470 | +int main(int argc, char **argv) |
| 471 | +{ |
| 472 | + int ret; |
| 473 | + AVPacket packet = { .data = NULL, .size = 0 }; |
| 474 | + AVFrame *frame = NULL; |
| 475 | + enum AVMediaType type; |
| 476 | + unsigned int stream_index; |
| 477 | + unsigned int i; |
| 478 | + int got_frame; |
| 479 | + int (*dec_func)(AVCodecContext *, AVFrame *, int *, const AVPacket *); |
| 480 | + |
| 481 | + if (argc != 3) { |
| 482 | + av_log(NULL, AV_LOG_ERROR, "Usage: %s <input file> <output file>\n", argv[0]); |
| 483 | + return 1; |
| 484 | + } |
| 485 | + |
| 486 | + av_register_all(); |
| 487 | + avfilter_register_all(); |
| 488 | + |
| 489 | + if ((ret = open_input_file(argv[1])) < 0) |
| 490 | + goto end; |
| 491 | + if ((ret = open_output_file(argv[2])) < 0) |
| 492 | + goto end; |
| 493 | + if ((ret = init_filters()) < 0) |
| 494 | + goto end; |
| 495 | + |
| 496 | + /* read all packets */ |
| 497 | + while (1) { |
| 498 | + if ((ret = av_read_frame(ifmt_ctx, &packet)) < 0) |
| 499 | + break; |
| 500 | + stream_index = packet.stream_index; |
| 501 | + type = ifmt_ctx->streams[packet.stream_index]->codec->codec_type; |
| 502 | + av_log(NULL, AV_LOG_DEBUG, "Demuxer gave frame of stream_index %u\n", |
| 503 | + stream_index); |
| 504 | + |
| 505 | + if (filter_ctx[stream_index].filter_graph) { |
| 506 | + av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n"); |
| 507 | + frame = av_frame_alloc(); |
| 508 | + if (!frame) { |
| 509 | + ret = AVERROR(ENOMEM); |
| 510 | + break; |
| 511 | + } |
| 512 | + packet.dts = av_rescale_q_rnd(packet.dts, |
| 513 | + ifmt_ctx->streams[stream_index]->time_base, |
| 514 | + ifmt_ctx->streams[stream_index]->codec->time_base, |
| 515 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 516 | + packet.pts = av_rescale_q_rnd(packet.pts, |
| 517 | + ifmt_ctx->streams[stream_index]->time_base, |
| 518 | + ifmt_ctx->streams[stream_index]->codec->time_base, |
| 519 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 520 | + dec_func = (type == AVMEDIA_TYPE_VIDEO) ? avcodec_decode_video2 : |
| 521 | + avcodec_decode_audio4; |
| 522 | + ret = dec_func(ifmt_ctx->streams[stream_index]->codec, frame, |
| 523 | + &got_frame, &packet); |
| 524 | + if (ret < 0) { |
| 525 | + av_frame_free(&frame); |
| 526 | + av_log(NULL, AV_LOG_ERROR, "Decoding failed\n"); |
| 527 | + break; |
| 528 | + } |
| 529 | + |
| 530 | + if (got_frame) { |
| 531 | + frame->pts = av_frame_get_best_effort_timestamp(frame); |
| 532 | + ret = filter_encode_write_frame(frame, stream_index); |
| 533 | + av_frame_free(&frame); |
| 534 | + if (ret < 0) |
| 535 | + goto end; |
| 536 | + } else { |
| 537 | + av_frame_free(&frame); |
| 538 | + } |
| 539 | + } else { |
| 540 | + /* remux this frame without reencoding */ |
| 541 | + packet.dts = av_rescale_q_rnd(packet.dts, |
| 542 | + ifmt_ctx->streams[stream_index]->time_base, |
| 543 | + ofmt_ctx->streams[stream_index]->time_base, |
| 544 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 545 | + packet.pts = av_rescale_q_rnd(packet.pts, |
| 546 | + ifmt_ctx->streams[stream_index]->time_base, |
| 547 | + ofmt_ctx->streams[stream_index]->time_base, |
| 548 | + AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
| 549 | + |
| 550 | + ret = av_interleaved_write_frame(ofmt_ctx, &packet); |
| 551 | + if (ret < 0) |
| 552 | + goto end; |
| 553 | + } |
| 554 | + av_free_packet(&packet); |
| 555 | + } |
| 556 | + |
| 557 | + /* flush filters and encoders */ |
| 558 | + for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
| 559 | + /* flush filter */ |
| 560 | + if (!filter_ctx[i].filter_graph) |
| 561 | + continue; |
| 562 | + ret = filter_encode_write_frame(NULL, i); |
| 563 | + if (ret < 0) { |
| 564 | + av_log(NULL, AV_LOG_ERROR, "Flushing filter failed\n"); |
| 565 | + goto end; |
| 566 | + } |
| 567 | + |
| 568 | + /* flush encoder */ |
| 569 | + ret = flush_encoder(i); |
| 570 | + if (ret < 0) { |
| 571 | + av_log(NULL, AV_LOG_ERROR, "Flushing encoder failed\n"); |
| 572 | + goto end; |
| 573 | + } |
| 574 | + } |
| 575 | + |
| 576 | + av_write_trailer(ofmt_ctx); |
| 577 | +end: |
| 578 | + av_free_packet(&packet); |
| 579 | + av_frame_free(&frame); |
| 580 | + for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
| 581 | + avcodec_close(ifmt_ctx->streams[i]->codec); |
| 582 | + if (ofmt_ctx && ofmt_ctx->nb_streams > i && ofmt_ctx->streams[i] && ofmt_ctx->streams[i]->codec) |
| 583 | + avcodec_close(ofmt_ctx->streams[i]->codec); |
| 584 | + if (filter_ctx && filter_ctx[i].filter_graph) |
| 585 | + avfilter_graph_free(&filter_ctx[i].filter_graph); |
| 586 | + } |
| 587 | + av_free(filter_ctx); |
| 588 | + avformat_close_input(&ifmt_ctx); |
| 589 | + if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) |
| 590 | + avio_close(ofmt_ctx->pb); |
| 591 | + avformat_free_context(ofmt_ctx); |
| 592 | + |
| 593 | + if (ret < 0) |
| 594 | + av_log(NULL, AV_LOG_ERROR, "Error occurred: %s\n", av_err2str(ret)); |
| 595 | + |
| 596 | + return ret ? 1 : 0; |
| 597 | +} |