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examples: add remuxing example
Show how to perform streamcopy from one container to another.
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parent
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.gitignore
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1
.gitignore
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@ -41,6 +41,7 @@
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/doc/examples/metadata
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/doc/examples/muxing
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/doc/examples/pc-uninstalled
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/doc/examples/remuxing
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/doc/examples/resampling_audio
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/doc/examples/scaling_video
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/doc/examples/transcode_aac
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1
configure
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1
configure
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@ -1246,6 +1246,7 @@ EXAMPLE_LIST="
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filtering_video_example
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metadata_example
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muxing_example
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remuxing_example
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resampling_audio_example
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scaling_video_example
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transcode_aac_example
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@ -42,6 +42,7 @@ DOC_EXAMPLES-$(CONFIG_FILTERING_AUDIO_EXAMPLE) += filtering_audio
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DOC_EXAMPLES-$(CONFIG_FILTERING_VIDEO_EXAMPLE) += filtering_video
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DOC_EXAMPLES-$(CONFIG_METADATA_EXAMPLE) += metadata
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DOC_EXAMPLES-$(CONFIG_MUXING_EXAMPLE) += muxing
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DOC_EXAMPLES-$(CONFIG_REMUXING_EXAMPLE) += remuxing
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DOC_EXAMPLES-$(CONFIG_RESAMPLING_AUDIO_EXAMPLE) += resampling_audio
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DOC_EXAMPLES-$(CONFIG_SCALING_VIDEO_EXAMPLE) += scaling_video
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DOC_EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE) += transcode_aac
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@ -17,6 +17,7 @@ EXAMPLES= decoding_encoding \
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filtering_audio \
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metadata \
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muxing \
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remuxing \
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resampling_audio \
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scaling_video \
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transcode_aac \
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164
doc/examples/remuxing.c
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164
doc/examples/remuxing.c
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@ -0,0 +1,164 @@
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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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