Why is the audio and video imported by x7 out of sync and stuck?

The reason why sound and video are not synchronized may be that there is something wrong with the AVI video file you imported. There are many reasons for the card, such as the video file is too large, the resolution is too high, the video format and so on. If you like, you can use format factory software to convert your original video into mpg format, and then import it for editing.