ffmpeg一些东西设置

av_opt_set(codecContext->priv_data, "preset", "veryfast", 0);
AVDictionary * codec_options( 0 );av_dict_set( &codec_options, "preset", "veryfast", 0 );// av_dict_set( &codec_options, "AnyCodecParameter", "Value", 0 );avcodec_open2( codecContext, videoCodec, &codec_options );

大部分模块下面都有options_table.h，这里面包含各种设置的参数，要了解这些估计不简单，挺费劲