1, "The exported video and audio will not be synchronized", the most likely reason is that the computer configuration you used to play this video is too low to meet the requirements of playing this video;

2. You should explain the computer configuration you used to play this video;

I say this because I used to encounter this kind of problem. Later, I changed to a high-profile computer, and this problem has never happened since;

For example, if your computer was a computer ten years ago, it is extremely prone to this problem.