分析video / audio 数据流的pts以及每个数据包长度，以便处理不同步问题-paser pts for audio/video filter, help to handle sync problems

AVS2播放器，用来分析监测AVS2编码的ES数据包准确性，可以用来测试编码器是否符合标准。(AVS2 Player, which is used to analyze and monitor the accuracy of ES packets encoded by AVS2, can be used to test whether the encoder meets the standard.)