How To Fix Audio Video Sync Problem With Media Player Classic

This is a quick guide for correcting out of sync audio on your movie files. If the audio is out of sync throughout the movie by the same amount from start to finish it can usually be corrected during playback without too much difficulty.


1. Open your movie from the file / open file menu





2. Play through the movie find a section with speech where you can see lip movement. Determine if the audio comes before the video or after the video.





3. MPC allows you to shift the audio stream as the movie plays go to the view menu and click on options, then enable the audio switcher and audio time shift boxes as in example 4.





4. If your movie plays the audio before the video you need a to enter
a positive value in the Audio time shift box.

As a guide try using 1000 ms for every second that the audio is out

if your audio comes 1 sec before the video try 1000 as a starting point

if your audio comes 1/2 sec before the video try 500 as a starting point

if your audio comes 1/4 sec before the video try 250 as a starting point

in example 4 (below) the audio comes 1/2 sec before the video

so an adjustment of 500 ms has been set

click apply & OK ... and check the sync





5. If your movie plays the audio after the video you need a to enter
a negative value, notice these are entered with a minus sign.

As a guide try using -1000 ms for every second that the audio is out

if your audio comes 1 sec after the video try -1000 as a starting point

if your audio comes 1/2 sec after the video try -500 as a starting point

if your audio comes 1/4 sec after the video try -250 as a starting point

in example 5 (below) the audio comes 1/2 sec after the video

so an adjustment of - 500 ms has been set

click apply & OK ... and check the sync





6. Keep altering the audio time shift value and replaying the movie until
the sync is correct. Make a note of the final value because you'll need to
use it every time you play this movie. If your movie is an AVI file you can
use this freeware program to apply the audio correction permanently.

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