diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rwxr-xr-x | configure | 1 | ||||
| -rw-r--r-- | doc/Makefile | 1 | ||||
| -rw-r--r-- | doc/examples/Makefile | 1 | ||||
| -rw-r--r-- | doc/examples/remuxing.c | 164 |
5 files changed, 168 insertions, 0 deletions
@@ -41,6 +41,7 @@ /doc/examples/metadata /doc/examples/muxing /doc/examples/pc-uninstalled +/doc/examples/remuxing /doc/examples/resampling_audio /doc/examples/scaling_video /doc/examples/transcode_aac @@ -1246,6 +1246,7 @@ EXAMPLE_LIST=" filtering_video_example metadata_example muxing_example + remuxing_example resampling_audio_example scaling_video_example transcode_aac_example diff --git a/doc/Makefile b/doc/Makefile index 26bd9f5..4092f52 100644 --- a/doc/Makefile +++ b/doc/Makefile @@ -42,6 +42,7 @@ DOC_EXAMPLES-$(CONFIG_FILTERING_AUDIO_EXAMPLE) += filtering_audio DOC_EXAMPLES-$(CONFIG_FILTERING_VIDEO_EXAMPLE) += filtering_video DOC_EXAMPLES-$(CONFIG_METADATA_EXAMPLE) += metadata DOC_EXAMPLES-$(CONFIG_MUXING_EXAMPLE) += muxing +DOC_EXAMPLES-$(CONFIG_REMUXING_EXAMPLE) += remuxing DOC_EXAMPLES-$(CONFIG_RESAMPLING_AUDIO_EXAMPLE) += resampling_audio DOC_EXAMPLES-$(CONFIG_SCALING_VIDEO_EXAMPLE) += scaling_video DOC_EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE) += transcode_aac diff --git a/doc/examples/Makefile b/doc/examples/Makefile index f085532..a25455e 100644 --- a/doc/examples/Makefile +++ b/doc/examples/Makefile @@ -17,6 +17,7 @@ EXAMPLES= decoding_encoding \ filtering_audio \ metadata \ muxing \ + remuxing \ resampling_audio \ scaling_video \ transcode_aac \ diff --git a/doc/examples/remuxing.c b/doc/examples/remuxing.c new file mode 100644 index 0000000..e58393b --- /dev/null +++ b/doc/examples/remuxing.c @@ -0,0 +1,164 @@ +/* + * Copyright (c) 2013 Stefano Sabatini + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/** + * @file + * libavformat/libavcodec demuxing and muxing API example. + * + * Remux streams from one container format to another. + * @example doc/examples/remuxing.c + */ + +#include <libavutil/timestamp.h> +#include <libavformat/avformat.h> + +static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag) +{ + AVRational *time_base = &fmt_ctx->streams[pkt->stream_index]->time_base; + + printf("%s: pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n", + tag, + av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base), + av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base), + av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base), + pkt->stream_index); +} + +int main(int argc, char **argv) +{ + AVOutputFormat *ofmt = NULL; + AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; + AVPacket pkt; + const char *in_filename, *out_filename; + int ret, i; + + if (argc < 3) { + printf("usage: %s input output\n" + "API example program to remux a media file with libavformat and libavcodec.\n" + "The output format is guessed according to the file extension.\n" + "\n", argv[0]); + return 1; + } + + in_filename = argv[1]; + out_filename = argv[2]; + + av_register_all(); + + if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { + fprintf(stderr, "Could not open input file '%s'", in_filename); + goto end; + } + + if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) { + fprintf(stderr, "Failed to retrieve input stream information"); + goto end; + } + + av_dump_format(ifmt_ctx, 0, in_filename, 0); + + avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename); + if (!ofmt_ctx) { + fprintf(stderr, "Could not create output context\n"); + ret = AVERROR_UNKNOWN; + goto end; + } + + ofmt = ofmt_ctx->oformat; + + for (i = 0; i < ifmt_ctx->nb_streams; i++) { + AVStream *in_stream = ifmt_ctx->streams[i]; + AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec); + if (!out_stream) { + fprintf(stderr, "Failed allocating output stream\n"); + ret = AVERROR_UNKNOWN; + goto end; + } + + ret = avcodec_copy_context(out_stream->codec, in_stream->codec); + if (ret < 0) { + fprintf(stderr, "Failed to copy context from input to output stream codec context\n"); + goto end; + } + if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) + out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER; + } + av_dump_format(ofmt_ctx, 0, out_filename, 1); + + if (!(ofmt->flags & AVFMT_NOFILE)) { + ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE); + if (ret < 0) { + fprintf(stderr, "Could not open output file '%s'", out_filename); + goto end; + } + } + + ret = avformat_write_header(ofmt_ctx, NULL); + if (ret < 0) { + fprintf(stderr, "Error occurred when opening output file\n"); + goto end; + } + + while (1) { + AVStream *in_stream, *out_stream; + + ret = av_read_frame(ifmt_ctx, &pkt); + if (ret < 0) + break; + + in_stream = ifmt_ctx->streams[pkt.stream_index]; + out_stream = ofmt_ctx->streams[pkt.stream_index]; + + log_packet(ifmt_ctx, &pkt, "in"); + + /* copy packet */ + pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); + pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); + pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base); + pkt.pos = -1; + log_packet(ofmt_ctx, &pkt, "out"); + + ret = av_interleaved_write_frame(ofmt_ctx, &pkt); + if (ret < 0) { + fprintf(stderr, "Error muxing packet\n"); + break; + } + av_free_packet(&pkt); + } + + av_write_trailer(ofmt_ctx); +end: + + avformat_close_input(&ifmt_ctx); + + /* close output */ + if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE)) + avio_close(ofmt_ctx->pb); + avformat_free_context(ofmt_ctx); + + if (ret < 0 && ret != AVERROR_EOF) { + fprintf(stderr, "Error occurred: %s\n", av_err2str(ret)); + return 1; + } + + return 0; +} |
