mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>pull/293/head
parent
e21235f9b9
commit
e10ab43614
4 changed files with 601 additions and 0 deletions
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/*
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* Copyright (c) 2010 Nicolas George |
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* Copyright (c) 2011 Stefano Sabatini |
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* Copyright (c) 2014 Andrey Utkin |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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|
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/**
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* @file |
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* API example for demuxing, decoding, filtering, encoding and muxing |
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* @example doc/examples/transcoding.c |
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*/ |
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#include <libavcodec/avcodec.h> |
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#include <libavformat/avformat.h> |
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#include <libavfilter/avfiltergraph.h> |
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#include <libavfilter/avcodec.h> |
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#include <libavfilter/buffersink.h> |
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#include <libavfilter/buffersrc.h> |
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#include <libavutil/opt.h> |
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#include <libavutil/pixdesc.h> |
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static AVFormatContext *ifmt_ctx; |
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static AVFormatContext *ofmt_ctx; |
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typedef struct FilteringContext { |
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AVFilterContext *buffersink_ctx; |
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AVFilterContext *buffersrc_ctx; |
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AVFilterGraph *filter_graph; |
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} FilteringContext; |
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static FilteringContext *filter_ctx; |
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static int open_input_file(const char *filename) |
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{ |
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int ret; |
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unsigned int i; |
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ifmt_ctx = NULL; |
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if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n"); |
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return ret; |
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} |
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if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n"); |
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return ret; |
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} |
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for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
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AVStream *stream; |
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AVCodecContext *codec_ctx; |
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stream = ifmt_ctx->streams[i]; |
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codec_ctx = stream->codec; |
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/* Reencode video & audio and remux subtitles etc. */ |
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if (codec_ctx->codec_type == AVMEDIA_TYPE_VIDEO |
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|| codec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { |
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/* Open decoder */ |
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ret = avcodec_open2(codec_ctx, |
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avcodec_find_decoder(codec_ctx->codec_id), NULL); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Failed to open decoder for stream #%u\n", i); |
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return ret; |
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} |
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} |
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} |
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av_dump_format(ifmt_ctx, 0, filename, 0); |
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return 0; |
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} |
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static int open_output_file(const char *filename) |
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{ |
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AVStream *out_stream; |
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AVStream *in_stream; |
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AVCodecContext *dec_ctx, *enc_ctx; |
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AVCodec *encoder; |
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int ret; |
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unsigned int i; |
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ofmt_ctx = NULL; |
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avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename); |
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if (!ofmt_ctx) { |
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av_log(NULL, AV_LOG_ERROR, "Could not create output context\n"); |
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return AVERROR_UNKNOWN; |
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} |
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for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
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out_stream = avformat_new_stream(ofmt_ctx, NULL); |
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if (!out_stream) { |
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av_log(NULL, AV_LOG_ERROR, "Failed allocating output stream\n"); |
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return AVERROR_UNKNOWN; |
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} |
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in_stream = ifmt_ctx->streams[i]; |
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dec_ctx = in_stream->codec; |
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enc_ctx = out_stream->codec; |
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if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO |
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|| dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { |
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/* in this example, we choose transcoding to same codec */ |
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encoder = avcodec_find_encoder(dec_ctx->codec_id); |
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/* In this example, we transcode to same properties (picture size,
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* sample rate etc.). These properties can be changed for output |
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* streams easily using filters */ |
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if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { |
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enc_ctx->height = dec_ctx->height; |
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enc_ctx->width = dec_ctx->width; |
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enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio; |
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/* take first format from list of supported formats */ |
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enc_ctx->pix_fmt = encoder->pix_fmts[0]; |
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/* video time_base can be set to whatever is handy and supported by encoder */ |
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enc_ctx->time_base = dec_ctx->time_base; |
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} else { |
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enc_ctx->sample_rate = dec_ctx->sample_rate; |
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enc_ctx->channel_layout = dec_ctx->channel_layout; |
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enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); |
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/* take first format from list of supported formats */ |
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enc_ctx->sample_fmt = encoder->sample_fmts[0]; |
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enc_ctx->time_base = (AVRational){1, enc_ctx->sample_rate}; |
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} |
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/* Third parameter can be used to pass settings to encoder */ |
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ret = avcodec_open2(enc_ctx, encoder, NULL); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot open video encoder for stream #%u\n", i); |
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return ret; |
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} |
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} else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) { |
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av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is of unknown type, cannot proceed\n", i); |
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return AVERROR_INVALIDDATA; |
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} else { |
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/* if this stream must be remuxed */ |
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ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec, |
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ifmt_ctx->streams[i]->codec); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Copying stream context failed\n"); |
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return ret; |
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} |
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} |
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if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) |
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enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER; |
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} |
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av_dump_format(ofmt_ctx, 0, filename, 1); |
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if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) { |
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ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Could not open output file '%s'", filename); |
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return ret; |
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} |
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} |
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/* init muxer, write output file header */ |
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ret = avformat_write_header(ofmt_ctx, NULL); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output file\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx, |
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AVCodecContext *enc_ctx, const char *filter_spec) |
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{ |
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char args[512]; |
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int ret = 0; |
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AVFilter *buffersrc = NULL; |
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AVFilter *buffersink = NULL; |
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AVFilterContext *buffersrc_ctx = NULL; |
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AVFilterContext *buffersink_ctx = NULL; |
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AVFilterInOut *outputs = avfilter_inout_alloc(); |
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AVFilterInOut *inputs = avfilter_inout_alloc(); |
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AVFilterGraph *filter_graph = avfilter_graph_alloc(); |
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if (!outputs || !inputs || !filter_graph) { |
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ret = AVERROR(ENOMEM); |
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goto end; |
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} |
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if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { |
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buffersrc = avfilter_get_by_name("buffer"); |
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buffersink = avfilter_get_by_name("buffersink"); |
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if (!buffersrc || !buffersink) { |
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av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); |
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ret = AVERROR_UNKNOWN; |
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goto end; |
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} |
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snprintf(args, sizeof(args), |
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"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", |
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dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt, |
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dec_ctx->time_base.num, dec_ctx->time_base.den, |
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dec_ctx->sample_aspect_ratio.num, |
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dec_ctx->sample_aspect_ratio.den); |
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ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", |
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args, NULL, filter_graph); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n"); |
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goto end; |
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} |
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ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", |
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NULL, NULL, filter_graph); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n"); |
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goto end; |
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} |
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ret = av_opt_set_bin(buffersink_ctx, "pix_fmts", |
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(uint8_t*)&enc_ctx->pix_fmt, sizeof(enc_ctx->pix_fmt), |
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AV_OPT_SEARCH_CHILDREN); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel format\n"); |
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goto end; |
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} |
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} else if (dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { |
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buffersrc = avfilter_get_by_name("abuffer"); |
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buffersink = avfilter_get_by_name("abuffersink"); |
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if (!buffersrc || !buffersink) { |
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av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); |
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ret = AVERROR_UNKNOWN; |
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goto end; |
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} |
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if (!dec_ctx->channel_layout) |
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dec_ctx->channel_layout = |
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av_get_default_channel_layout(dec_ctx->channels); |
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snprintf(args, sizeof(args), |
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"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64, |
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dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->sample_rate, |
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av_get_sample_fmt_name(dec_ctx->sample_fmt), |
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dec_ctx->channel_layout); |
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ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", |
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args, NULL, filter_graph); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n"); |
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goto end; |
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} |
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ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", |
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NULL, NULL, filter_graph); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n"); |
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goto end; |
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} |
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ret = av_opt_set_bin(buffersink_ctx, "sample_fmts", |
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(uint8_t*)&enc_ctx->sample_fmt, sizeof(enc_ctx->sample_fmt), |
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AV_OPT_SEARCH_CHILDREN); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n"); |
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goto end; |
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} |
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ret = av_opt_set_bin(buffersink_ctx, "channel_layouts", |
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(uint8_t*)&enc_ctx->channel_layout, |
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sizeof(enc_ctx->channel_layout), AV_OPT_SEARCH_CHILDREN); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n"); |
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goto end; |
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} |
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ret = av_opt_set_bin(buffersink_ctx, "sample_rates", |
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(uint8_t*)&enc_ctx->sample_rate, sizeof(enc_ctx->sample_rate), |
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AV_OPT_SEARCH_CHILDREN); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n"); |
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goto end; |
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} |
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} else { |
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ret = AVERROR_UNKNOWN; |
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goto end; |
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} |
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/* Endpoints for the filter graph. */ |
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outputs->name = av_strdup("in"); |
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outputs->filter_ctx = buffersrc_ctx; |
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outputs->pad_idx = 0; |
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outputs->next = NULL; |
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inputs->name = av_strdup("out"); |
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inputs->filter_ctx = buffersink_ctx; |
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inputs->pad_idx = 0; |
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inputs->next = NULL; |
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if (!outputs->name || !inputs->name) { |
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ret = AVERROR(ENOMEM); |
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goto end; |
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} |
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if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_spec, |
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&inputs, &outputs, NULL)) < 0) |
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goto end; |
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if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0) |
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goto end; |
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/* Fill FilteringContext */ |
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fctx->buffersrc_ctx = buffersrc_ctx; |
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fctx->buffersink_ctx = buffersink_ctx; |
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fctx->filter_graph = filter_graph; |
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end: |
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avfilter_inout_free(&inputs); |
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avfilter_inout_free(&outputs); |
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return ret; |
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} |
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static int init_filters(void) |
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{ |
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const char *filter_spec; |
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unsigned int i; |
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int ret; |
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filter_ctx = av_malloc(sizeof(FilteringContext) * ifmt_ctx->nb_streams); |
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if (!filter_ctx) |
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return AVERROR(ENOMEM); |
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for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
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filter_ctx[i].buffersrc_ctx = NULL; |
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filter_ctx[i].buffersink_ctx = NULL; |
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filter_ctx[i].filter_graph = NULL; |
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if (!(ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO |
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|| ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)) |
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continue; |
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if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
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filter_spec = "null"; /* passthrough (dummy) filter for video */ |
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else |
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filter_spec = "anull"; /* passthrough (dummy) filter for audio */ |
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ret = init_filter(&filter_ctx[i], ifmt_ctx->streams[i]->codec, |
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ofmt_ctx->streams[i]->codec, filter_spec); |
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if (ret) |
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return ret; |
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} |
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return 0; |
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} |
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static int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) { |
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int ret; |
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int got_frame_local; |
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AVPacket enc_pkt; |
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int (*enc_func)(AVCodecContext *, AVPacket *, const AVFrame *, int *) = |
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(ifmt_ctx->streams[stream_index]->codec->codec_type == |
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AVMEDIA_TYPE_VIDEO) ? avcodec_encode_video2 : avcodec_encode_audio2; |
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if (!got_frame) |
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got_frame = &got_frame_local; |
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av_log(NULL, AV_LOG_INFO, "Encoding frame\n"); |
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/* encode filtered frame */ |
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enc_pkt.data = NULL; |
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enc_pkt.size = 0; |
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av_init_packet(&enc_pkt); |
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ret = enc_func(ofmt_ctx->streams[stream_index]->codec, &enc_pkt, |
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filt_frame, got_frame); |
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av_frame_free(&filt_frame); |
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if (ret < 0) |
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return ret; |
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if (!(*got_frame)) |
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return 0; |
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|
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/* prepare packet for muxing */ |
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enc_pkt.stream_index = stream_index; |
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enc_pkt.dts = av_rescale_q_rnd(enc_pkt.dts, |
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ofmt_ctx->streams[stream_index]->codec->time_base, |
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ofmt_ctx->streams[stream_index]->time_base, |
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AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
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enc_pkt.pts = av_rescale_q_rnd(enc_pkt.pts, |
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ofmt_ctx->streams[stream_index]->codec->time_base, |
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ofmt_ctx->streams[stream_index]->time_base, |
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AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
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enc_pkt.duration = av_rescale_q(enc_pkt.duration, |
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ofmt_ctx->streams[stream_index]->codec->time_base, |
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ofmt_ctx->streams[stream_index]->time_base); |
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av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n"); |
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/* mux encoded frame */ |
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ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt); |
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return ret; |
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} |
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static int filter_encode_write_frame(AVFrame *frame, unsigned int stream_index) |
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{ |
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int ret; |
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AVFrame *filt_frame; |
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av_log(NULL, AV_LOG_INFO, "Pushing decoded frame to filters\n"); |
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/* push the decoded frame into the filtergraph */ |
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ret = av_buffersrc_add_frame_flags(filter_ctx[stream_index].buffersrc_ctx, |
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frame, 0); |
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if (ret < 0) { |
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av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n"); |
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return ret; |
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} |
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|
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/* pull filtered frames from the filtergraph */ |
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while (1) { |
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filt_frame = av_frame_alloc(); |
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if (!filt_frame) { |
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ret = AVERROR(ENOMEM); |
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break; |
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} |
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av_log(NULL, AV_LOG_INFO, "Pulling filtered frame from filters\n"); |
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ret = av_buffersink_get_frame(filter_ctx[stream_index].buffersink_ctx, |
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filt_frame); |
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if (ret < 0) { |
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/* if no more frames for output - returns AVERROR(EAGAIN)
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* if flushed and no more frames for output - returns AVERROR_EOF |
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* rewrite retcode to 0 to show it as normal procedure completion |
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*/ |
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if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) |
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ret = 0; |
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av_frame_free(&filt_frame); |
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break; |
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} |
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|
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filt_frame->pict_type = AV_PICTURE_TYPE_NONE; |
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ret = encode_write_frame(filt_frame, stream_index, NULL); |
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if (ret < 0) |
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break; |
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} |
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|
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return ret; |
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} |
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|
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static int flush_encoder(unsigned int stream_index) |
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{ |
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int ret; |
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int got_frame; |
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|
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if (!(ofmt_ctx->streams[stream_index]->codec->codec->capabilities & |
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CODEC_CAP_DELAY)) |
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return 0; |
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|
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while (1) { |
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av_log(NULL, AV_LOG_INFO, "Flushing stream #%u encoder\n", stream_index); |
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ret = encode_write_frame(NULL, stream_index, &got_frame); |
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if (ret < 0) |
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break; |
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if (!got_frame) |
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return 0; |
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} |
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return ret; |
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} |
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|
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int main(int argc, char **argv) |
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{ |
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int ret; |
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AVPacket packet = { .data = NULL, .size = 0 }; |
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AVFrame *frame = NULL; |
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enum AVMediaType type; |
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unsigned int stream_index; |
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unsigned int i; |
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int got_frame; |
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int (*dec_func)(AVCodecContext *, AVFrame *, int *, const AVPacket *); |
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|
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if (argc != 3) { |
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av_log(NULL, AV_LOG_ERROR, "Usage: %s <input file> <output file>\n", argv[0]); |
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return 1; |
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} |
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|
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av_register_all(); |
||||
avfilter_register_all(); |
||||
|
||||
if ((ret = open_input_file(argv[1])) < 0) |
||||
goto end; |
||||
if ((ret = open_output_file(argv[2])) < 0) |
||||
goto end; |
||||
if ((ret = init_filters()) < 0) |
||||
goto end; |
||||
|
||||
/* read all packets */ |
||||
while (1) { |
||||
if ((ret = av_read_frame(ifmt_ctx, &packet)) < 0) |
||||
break; |
||||
stream_index = packet.stream_index; |
||||
type = ifmt_ctx->streams[packet.stream_index]->codec->codec_type; |
||||
av_log(NULL, AV_LOG_DEBUG, "Demuxer gave frame of stream_index %u\n", |
||||
stream_index); |
||||
|
||||
if (filter_ctx[stream_index].filter_graph) { |
||||
av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n"); |
||||
frame = av_frame_alloc(); |
||||
if (!frame) { |
||||
ret = AVERROR(ENOMEM); |
||||
break; |
||||
} |
||||
packet.dts = av_rescale_q_rnd(packet.dts, |
||||
ifmt_ctx->streams[stream_index]->time_base, |
||||
ifmt_ctx->streams[stream_index]->codec->time_base, |
||||
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
||||
packet.pts = av_rescale_q_rnd(packet.pts, |
||||
ifmt_ctx->streams[stream_index]->time_base, |
||||
ifmt_ctx->streams[stream_index]->codec->time_base, |
||||
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
||||
dec_func = (type == AVMEDIA_TYPE_VIDEO) ? avcodec_decode_video2 : |
||||
avcodec_decode_audio4; |
||||
ret = dec_func(ifmt_ctx->streams[stream_index]->codec, frame, |
||||
&got_frame, &packet); |
||||
if (ret < 0) { |
||||
av_frame_free(&frame); |
||||
av_log(NULL, AV_LOG_ERROR, "Decoding failed\n"); |
||||
break; |
||||
} |
||||
|
||||
if (got_frame) { |
||||
frame->pts = av_frame_get_best_effort_timestamp(frame); |
||||
ret = filter_encode_write_frame(frame, stream_index); |
||||
av_frame_free(&frame); |
||||
if (ret < 0) |
||||
goto end; |
||||
} else { |
||||
av_frame_free(&frame); |
||||
} |
||||
} else { |
||||
/* remux this frame without reencoding */ |
||||
packet.dts = av_rescale_q_rnd(packet.dts, |
||||
ifmt_ctx->streams[stream_index]->time_base, |
||||
ofmt_ctx->streams[stream_index]->time_base, |
||||
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
||||
packet.pts = av_rescale_q_rnd(packet.pts, |
||||
ifmt_ctx->streams[stream_index]->time_base, |
||||
ofmt_ctx->streams[stream_index]->time_base, |
||||
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
||||
|
||||
ret = av_interleaved_write_frame(ofmt_ctx, &packet); |
||||
if (ret < 0) |
||||
goto end; |
||||
} |
||||
av_free_packet(&packet); |
||||
} |
||||
|
||||
/* flush filters and encoders */ |
||||
for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
||||
/* flush filter */ |
||||
if (!filter_ctx[i].filter_graph) |
||||
continue; |
||||
ret = filter_encode_write_frame(NULL, i); |
||||
if (ret < 0) { |
||||
av_log(NULL, AV_LOG_ERROR, "Flushing filter failed\n"); |
||||
goto end; |
||||
} |
||||
|
||||
/* flush encoder */ |
||||
ret = flush_encoder(i); |
||||
if (ret < 0) { |
||||
av_log(NULL, AV_LOG_ERROR, "Flushing encoder failed\n"); |
||||
goto end; |
||||
} |
||||
} |
||||
|
||||
av_write_trailer(ofmt_ctx); |
||||
end: |
||||
av_free_packet(&packet); |
||||
av_frame_free(&frame); |
||||
for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
||||
avcodec_close(ifmt_ctx->streams[i]->codec); |
||||
if (ofmt_ctx && ofmt_ctx->nb_streams > i && ofmt_ctx->streams[i] && ofmt_ctx->streams[i]->codec) |
||||
avcodec_close(ofmt_ctx->streams[i]->codec); |
||||
if (filter_ctx && filter_ctx[i].filter_graph) |
||||
avfilter_graph_free(&filter_ctx[i].filter_graph); |
||||
} |
||||
av_free(filter_ctx); |
||||
avformat_close_input(&ifmt_ctx); |
||||
if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) |
||||
avio_close(ofmt_ctx->pb); |
||||
avformat_free_context(ofmt_ctx); |
||||
|
||||
if (ret < 0) |
||||
av_log(NULL, AV_LOG_ERROR, "Error occurred: %s\n", av_err2str(ret)); |
||||
|
||||
return ret ? 1 : 0; |
||||
} |
Loading…
Reference in new issue