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author | Stefano Sabatini <stefasab@gmail.com> | 2023-01-15 13:03:47 +0100 |
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committer | Stefano Sabatini <stefasab@gmail.com> | 2023-02-11 17:49:01 +0100 |
commit | 0a69ca656b7178c260f68d50d07b2e16a073050c (patch) | |
tree | 2ee069ec5f1d2ee7bd3eab7c1cac0bd225ef8086 /doc/examples/remuxing.c | |
parent | ab2ec8ef015c0516c9d6824ef47195adc6c2a40b (diff) | |
download | ffmpeg-0a69ca656b7178c260f68d50d07b2e16a073050c.tar.gz |
examples: rename remuxing to remux
Diffstat (limited to 'doc/examples/remuxing.c')
-rw-r--r-- | doc/examples/remuxing.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/doc/examples/remuxing.c b/doc/examples/remuxing.c deleted file mode 100644 index 2657f9dc66..0000000000 --- a/doc/examples/remuxing.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * 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 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) -{ - const AVOutputFormat *ofmt = NULL; - AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; - AVPacket *pkt = NULL; - const char *in_filename, *out_filename; - int ret, i; - int stream_index = 0; - int *stream_mapping = NULL; - int stream_mapping_size = 0; - - 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]; - - pkt = av_packet_alloc(); - if (!pkt) { - fprintf(stderr, "Could not allocate AVPacket\n"); - return 1; - } - - 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; - } - - stream_mapping_size = ifmt_ctx->nb_streams; - stream_mapping = av_calloc(stream_mapping_size, sizeof(*stream_mapping)); - if (!stream_mapping) { - ret = AVERROR(ENOMEM); - goto end; - } - - ofmt = ofmt_ctx->oformat; - - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - AVStream *out_stream; - AVStream *in_stream = ifmt_ctx->streams[i]; - AVCodecParameters *in_codecpar = in_stream->codecpar; - - if (in_codecpar->codec_type != AVMEDIA_TYPE_AUDIO && - in_codecpar->codec_type != AVMEDIA_TYPE_VIDEO && - in_codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) { - stream_mapping[i] = -1; - continue; - } - - stream_mapping[i] = stream_index++; - - out_stream = avformat_new_stream(ofmt_ctx, NULL); - if (!out_stream) { - fprintf(stderr, "Failed allocating output stream\n"); - ret = AVERROR_UNKNOWN; - goto end; - } - - ret = avcodec_parameters_copy(out_stream->codecpar, in_codecpar); - if (ret < 0) { - fprintf(stderr, "Failed to copy codec parameters\n"); - goto end; - } - out_stream->codecpar->codec_tag = 0; - } - 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]; - if (pkt->stream_index >= stream_mapping_size || - stream_mapping[pkt->stream_index] < 0) { - av_packet_unref(pkt); - continue; - } - - pkt->stream_index = stream_mapping[pkt->stream_index]; - out_stream = ofmt_ctx->streams[pkt->stream_index]; - log_packet(ifmt_ctx, pkt, "in"); - - /* copy packet */ - av_packet_rescale_ts(pkt, 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); - /* pkt is now blank (av_interleaved_write_frame() takes ownership of - * its contents and resets pkt), so that no unreferencing is necessary. - * This would be different if one used av_write_frame(). */ - if (ret < 0) { - fprintf(stderr, "Error muxing packet\n"); - break; - } - } - - av_write_trailer(ofmt_ctx); -end: - av_packet_free(&pkt); - - avformat_close_input(&ifmt_ctx); - - /* close output */ - if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE)) - avio_closep(&ofmt_ctx->pb); - avformat_free_context(ofmt_ctx); - - av_freep(&stream_mapping); - - if (ret < 0 && ret != AVERROR_EOF) { - fprintf(stderr, "Error occurred: %s\n", av_err2str(ret)); - return 1; - } - - return 0; -} |