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libavformat/metadata-example.c

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00001 /*
00002  * Copyright (c) 2011 Reinhard Tartler
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy
00005  * of this software and associated documentation files (the "Software"), to deal
00006  * in the Software without restriction, including without limitation the rights
00007  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008  * copies of the Software, and to permit persons to whom the Software is
00009  * furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included in
00012  * all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
00017  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020  * THE SOFTWARE.
00021  */
00022 
00029 #include <stdio.h>
00030 
00031 #include <libavformat/avformat.h>
00032 #include <libavutil/dict.h>
00033 
00034 int main (int argc, char **argv)
00035 {
00036     AVFormatContext *fmt_ctx = NULL;
00037     AVDictionaryEntry *tag = NULL;
00038     int ret;
00039 
00040     if (argc != 2) {
00041         printf("usage: %s <input_file>\n"
00042                "example program to demonstrate the use of the libavformat metadata API.\n"
00043                "\n", argv[0]);
00044         return 1;
00045     }
00046 
00047     av_register_all();
00048     if ((ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL)))
00049         return ret;
00050 
00051     while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
00052         printf("%s=%s\n", tag->key, tag->value);
00053 
00054     avformat_free_context(fmt_ctx);
00055     return 0;
00056 }
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