| 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 | |
| 34 | static 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 | |
| 46 | int 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); |
| 150 | end: |
| 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 | } |