Coding problem: The export format and codec you selected may not be suitable for your video. Try changing the export settings to use a codec that is more suitable for your video. For example, you can try to use a lower bit rate or a higher audio sampling rate to improve the synchronization of audio and video.
Frame rate problem: If your project uses different frame rates, it may cause the audio and video to be out of sync. Please make sure that your export settings match the project settings.
Editing problem: If the audio and video in the project are not properly aligned, the audio and video in the exported file may be out of sync. Examine each clip in the project carefully and make sure they are aligned in the correct order.
Export Settings Problem: If you use incorrect export settings, such as incorrect frame rate or incorrect timecode settings, audio and video may be out of sync. Please make sure that your export settings are correct and match your project settings.
If you still encounter the problem that audio and video are not synchronized, please try to re-import the original material reconstruction project, or try to export it with other video editing software. If the problem persists, please consult Adobe Customer Support or other professionals for more help.