/* * Copyright (c) 2011 Reinhard Tartler * * 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 * Shows how the metadata API can be used in application programs. * @example metadata.c */ #include <stdio.h> #include <libavformat/avformat.h>#include <libavutil/dict.h> int main (int argc, char **argv){    AVFormatContext *fmt_ctx = NULL;    AVDictionaryEntry *tag = NULL;    int ret;     if (argc != 2) {        printf("usage: %s <input_file>\n"               "example program to demonstrate the use of the libavformat metadata API.\n"               "\n", argv[0]);        return 1;    }     av_register_all();    if ((ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL)))        return ret;     while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))        printf("%s=%s\n", tag->key, tag->value);     avformat_close_input(&fmt_ctx);    return 0;}