- 1). Open the video editor you are working on and load the project with the audio and video tracks you are having issues syncing up.
- 2). Listen in the audio for any sudden noises such as the clap of a hand, items striking one another or something falling on the floor. You want to find anything that makes a sudden noise. The more sudden, the better.
- 3). Watch the video track to see when the sudden noise occurs on the video. If you cannot see the item making the noise on video, you need to select a different sound.
- 4). Listen one frame at a time to see if the sound is currently occurring before or after what you see in the video.
- 5). Move the audio forward or backward one frame at a time. Continue doing this until the audio syncs with the video.
Source...