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Synchronize sound and video with Mencoder

Here's what to do if the sound is not synchronized with the images in a video file. We are going to use Mplayer and Mencoder to fix this.

Detect the delay

Play your video file like this:

mplayer -delay 0.7 video.avi

Play it several times and adjust the delay number (here 0.7 second: it means that the sound will come 0.7 second earlier than in the original file) until everything is synchronized correctly.

Synchronize

Run Mencoder like this:

mencoder -delay 0.7 -oac copy -ovc copy video.avi -o output.avi

Replace 0.7 with the delay you determined earlier.