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I have a large video file (.avi), and as it is playing, the picture is becoming more and more late from the sound.

How can I fix this?

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up vote 0 down vote accepted

Open the video in Sony Vegas, unlock the audio from video, split the audio in 3 or more parts, move the parts so that they fill the whole timeline, with minimal distances between each other. Audio will just disappear sometimes, but it will be somewhat synchronized

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