mirror of
https://github.com/FFmpeg/FFmpeg.git
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62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
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* Copyright (c) 2011 Reinhard Tartler
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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 libavformat metadata extraction API usage example
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* @example show_metadata.c
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*
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* Show metadata from an input file.
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*/
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#include <stdio.h>
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#include <libavformat/avformat.h>
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#include <libavutil/dict.h>
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int main (int argc, char **argv)
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{
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AVFormatContext *fmt_ctx = NULL;
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const AVDictionaryEntry *tag = NULL;
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int ret;
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if (argc != 2) {
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printf("usage: %s <input_file>\n"
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"example program to demonstrate the use of the libavformat metadata API.\n"
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"\n", argv[0]);
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return 1;
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}
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if ((ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL)))
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return ret;
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if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
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av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
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return ret;
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}
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while ((tag = av_dict_iterate(fmt_ctx->metadata, tag)))
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printf("%s=%s\n", tag->key, tag->value);
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avformat_close_input(&fmt_ctx);
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return 0;
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}
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