Delay between the sound and the image in video

I’m running an experiment that includes videos. I currently only uploaded one short video (about 10 sec, MP4 file) to complete the experiment build, and there is a significant delay between the sound and the image. I tried looking for solutions but could not find anything that worked. what could be the problem?

I’m using MovieStim3,
python 3.6.6
psychopy 2021 2.3

thank you,

Hello, I have the same problem. Have you solved it?