mirror of https://github.com/FFmpeg/FFmpeg.git
Show how to perform streamcopy from one container to another.pull/54/head
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/*
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* Copyright (c) 2013 Stefano Sabatini |
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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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* @file |
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* libavformat/libavcodec demuxing and muxing API example. |
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* |
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* Remux streams from one container format to another. |
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* @example doc/examples/remuxing.c |
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*/ |
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#include <libavutil/timestamp.h> |
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#include <libavformat/avformat.h> |
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static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag) |
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{ |
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AVRational *time_base = &fmt_ctx->streams[pkt->stream_index]->time_base; |
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printf("%s: pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n", |
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tag, |
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av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base), |
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av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base), |
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av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base), |
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pkt->stream_index); |
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} |
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int main(int argc, char **argv) |
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{ |
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AVOutputFormat *ofmt = NULL; |
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AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; |
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AVPacket pkt; |
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const char *in_filename, *out_filename; |
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int ret, i; |
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if (argc < 3) { |
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printf("usage: %s input output\n" |
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"API example program to remux a media file with libavformat and libavcodec.\n" |
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"The output format is guessed according to the file extension.\n" |
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"\n", argv[0]); |
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return 1; |
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} |
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in_filename = argv[1]; |
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out_filename = argv[2]; |
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av_register_all(); |
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if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { |
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fprintf(stderr, "Could not open input file '%s'", in_filename); |
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goto end; |
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} |
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if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) { |
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fprintf(stderr, "Failed to retrieve input stream information"); |
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goto end; |
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} |
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av_dump_format(ifmt_ctx, 0, in_filename, 0); |
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avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename); |
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if (!ofmt_ctx) { |
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fprintf(stderr, "Could not create output context\n"); |
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ret = AVERROR_UNKNOWN; |
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goto end; |
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} |
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ofmt = ofmt_ctx->oformat; |
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for (i = 0; i < ifmt_ctx->nb_streams; i++) { |
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AVStream *in_stream = ifmt_ctx->streams[i]; |
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AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec); |
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if (!out_stream) { |
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fprintf(stderr, "Failed allocating output stream\n"); |
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ret = AVERROR_UNKNOWN; |
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goto end; |
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} |
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ret = avcodec_copy_context(out_stream->codec, in_stream->codec); |
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if (ret < 0) { |
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fprintf(stderr, "Failed to copy context from input to output stream codec context\n"); |
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goto end; |
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} |
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if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) |
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out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER; |
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} |
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av_dump_format(ofmt_ctx, 0, out_filename, 1); |
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if (!(ofmt->flags & AVFMT_NOFILE)) { |
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ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE); |
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if (ret < 0) { |
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fprintf(stderr, "Could not open output file '%s'", out_filename); |
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goto end; |
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} |
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} |
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ret = avformat_write_header(ofmt_ctx, NULL); |
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if (ret < 0) { |
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fprintf(stderr, "Error occurred when opening output file\n"); |
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goto end; |
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} |
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while (1) { |
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AVStream *in_stream, *out_stream; |
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ret = av_read_frame(ifmt_ctx, &pkt); |
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if (ret < 0) |
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break; |
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in_stream = ifmt_ctx->streams[pkt.stream_index]; |
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out_stream = ofmt_ctx->streams[pkt.stream_index]; |
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log_packet(ifmt_ctx, &pkt, "in"); |
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/* copy packet */ |
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pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
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pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); |
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pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base); |
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pkt.pos = -1; |
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log_packet(ofmt_ctx, &pkt, "out"); |
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ret = av_interleaved_write_frame(ofmt_ctx, &pkt); |
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if (ret < 0) { |
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fprintf(stderr, "Error muxing packet\n"); |
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break; |
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} |
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av_free_packet(&pkt); |
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} |
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av_write_trailer(ofmt_ctx); |
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end: |
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avformat_close_input(&ifmt_ctx); |
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/* close output */ |
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if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE)) |
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avio_close(ofmt_ctx->pb); |
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avformat_free_context(ofmt_ctx); |
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if (ret < 0 && ret != AVERROR_EOF) { |
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fprintf(stderr, "Error occurred: %s\n", av_err2str(ret)); |
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return 1; |
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} |
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return 0; |
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} |
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