如何使用FFMPEG从编码视频中提取AVPacket的重要信息

I wrote a code to read a video in encoded domain and able to retrieve information such as size and duration of frames. AVPacket class consist of a variable as data. I can read it but since it is a bite array I can't use it in readable format. I want to use this data for comparison with another video file. Please help.I wrote a code to read a video in encoded domai