1/* 2 * Copyright (c) 2013 Stefano Sabatini 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 * THE SOFTWARE. 21 */ 22 23/** 24 * @file 25 * libavformat/libavcodec demuxing and muxing API example. 26 * 27 * Remux streams from one container format to another. 28 * @example remuxing.c 29 */ 30 31#include <libavutil/timestamp.h> 32#include <libavformat/avformat.h> 33 34static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag) 35{ 36 AVRational *time_base = &fmt_ctx->streams[pkt->stream_index]->time_base; 37 38 printf("%s: pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n", 39 tag, 40 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base), 41 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base), 42 av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base), 43 pkt->stream_index); 44} 45 46int main(int argc, char **argv) 47{ 48 AVOutputFormat *ofmt = NULL; 49 AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; 50 AVPacket pkt; 51 const char *in_filename, *out_filename; 52 int ret, i; 53 54 if (argc < 3) { 55 printf("usage: %s input output\n" 56 "API example program to remux a media file with libavformat and libavcodec.\n" 57 "The output format is guessed according to the file extension.\n" 58 "\n", argv[0]); 59 return 1; 60 } 61 62 in_filename = argv[1]; 63 out_filename = argv[2]; 64 65 av_register_all(); 66 67 if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { 68 fprintf(stderr, "Could not open input file '%s'", in_filename); 69 goto end; 70 } 71 72 if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) { 73 fprintf(stderr, "Failed to retrieve input stream information"); 74 goto end; 75 } 76 77 av_dump_format(ifmt_ctx, 0, in_filename, 0); 78 79 avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename); 80 if (!ofmt_ctx) { 81 fprintf(stderr, "Could not create output context\n"); 82 ret = AVERROR_UNKNOWN; 83 goto end; 84 } 85 86 ofmt = ofmt_ctx->oformat; 87 88 for (i = 0; i < ifmt_ctx->nb_streams; i++) { 89 AVStream *in_stream = ifmt_ctx->streams[i]; 90 AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec); 91 if (!out_stream) { 92 fprintf(stderr, "Failed allocating output stream\n"); 93 ret = AVERROR_UNKNOWN; 94 goto end; 95 } 96 97 ret = avcodec_copy_context(out_stream->codec, in_stream->codec); 98 if (ret < 0) { 99 fprintf(stderr, "Failed to copy context from input to output stream codec context\n"); 100 goto end; 101 } 102 out_stream->codec->codec_tag = 0; 103 if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) 104 out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER; 105 } 106 av_dump_format(ofmt_ctx, 0, out_filename, 1); 107 108 if (!(ofmt->flags & AVFMT_NOFILE)) { 109 ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE); 110 if (ret < 0) { 111 fprintf(stderr, "Could not open output file '%s'", out_filename); 112 goto end; 113 } 114 } 115 116 ret = avformat_write_header(ofmt_ctx, NULL); 117 if (ret < 0) { 118 fprintf(stderr, "Error occurred when opening output file\n"); 119 goto end; 120 } 121 122 while (1) { 123 AVStream *in_stream, *out_stream; 124 125 ret = av_read_frame(ifmt_ctx, &pkt); 126 if (ret < 0) 127 break; 128 129 in_stream = ifmt_ctx->streams[pkt.stream_index]; 130 out_stream = ofmt_ctx->streams[pkt.stream_index]; 131 132 log_packet(ifmt_ctx, &pkt, "in"); 133 134 /* copy packet */ 135 pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); 136 pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); 137 pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base); 138 pkt.pos = -1; 139 log_packet(ofmt_ctx, &pkt, "out"); 140 141 ret = av_interleaved_write_frame(ofmt_ctx, &pkt); 142 if (ret < 0) { 143 fprintf(stderr, "Error muxing packet\n"); 144 break; 145 } 146 av_free_packet(&pkt); 147 } 148 149 av_write_trailer(ofmt_ctx); 150end: 151 152 avformat_close_input(&ifmt_ctx); 153 154 /* close output */ 155 if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE)) 156 avio_close(ofmt_ctx->pb); 157 avformat_free_context(ofmt_ctx); 158 159 if (ret < 0 && ret != AVERROR_EOF) { 160 fprintf(stderr, "Error occurred: %s\n", av_err2str(ret)); 161 return 1; 162 } 163 164 return 0; 165} 166