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Audio loses sync, drifts behind video


watx
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I have a problem where audio slowly loses sync behind the video, which I thought was unusual (as opposed to audio getting ahead, which is more typical). It starts to be obvious after about 5 minutes. If I skip forward and then skip back in the player (or vice versa), the audio and video will jump back in sync. So far this only happens with 29.97 video combined with 2 channel AAC audio. It doesn't happen with any other audio (2-5 channel DTS, AC3) or video, although I don't have any 24p/AAC files to test with, nor have I tried 2-channel MP3, uncompressed, etc.

 

I have tried various combinations of player and mixer settings, and none seem to have any effect on the sync problem. However, I don't really understand how all these settings work, and I couldn't find any good documentation on them. If you have any suggestions, please let me know!

 

My settings:

 

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559ac31278a90_ScreenShot20150706at124441

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