Avi audio sync problems, have tried a lot, please help

[Rocko]

I'm having sync problems with a few .avi files and need help. The audio goes in and out of sync throughout the movie. It will be in sync, then the video will jerk as if it misses a few frames (this happens every few minutes), and then the audio can go way out of sync.

The movie is an .avi with Mpeg4V3 Cracked compression. And the audio is VBR. I tried converting it to CBR audio with VirtualDub but it did not seem to fix the problem. I even tried re-encoding the whole movie as a last resort and it didn't help.

If I actually play it in VirtualDub rather than Windows Media Player, it's plays perfectly!. VirtualDub can't do full screen viewing or otherwise I'd just watch it in Virtualdub. When I load the avi in VirtualDub it says "virtualdub has detected an improper VBR encoding in the source avi and will rewrite the audio header w/standard CBR..."

Please advise how I can fix this.

Thanks
Eric--Windows XP, Athlon 500.

[Rocko]

Also.,.

I should mention that I am using the newest "Ace Mega Codec Pack"

Eric

[Enchanter]

It is likely that your system is having trouble playing the movie, seeing that you have a 500MHz system. What is the resolution of the movie? Your system would be more comfortable with a resolution of 512x() or lower. Anything higher will choke it.

A few solutions to you. Either you can re-size (to a lower resolution) and reencode it. You indicated that you know about how to encode, so I won't elaborate on that.

Alternatively (this may just help. If not, you need to do the first option), play the movie with all filters disabled and at a minimum desktop resolution and colour settings. Play movie with WMP 6.4 (Run mplayer2.exe from the Run command), then go to File -> Properties -> Advanced -> [DivX Codec] and double-click on it. You will see a slider bar, which is for the filter settings. Slide it all the way to the left. For your desktop, set it down to 800x600 (or even 640x480) and 16-bit colour.

Tell us how it's going on.

[Rocko]

thanks

Thanks for your reply. The movie is 640x352 so that might explain the problem--slow pc. The thing I thought was weird though is that, regardless of what player or resolution I have windows in, it's always the exact same spot where the sync goes out. Even if I skip straight to that spot, the sync is out exactly the same there, then continues to go in and out.

thanks for your input
Eric

[Enchanter]

...regardless of what player or resolution I have windows in, it's always the exact same spot where the sync goes out. Even if I skip straight to that spot, the sync is out exactly the same there, then continues to go in and out.

That would be a problem inherent in the original video file. It's not your fault.

[Giez79]

Try this:

http://forum.digital-digest.com/showthread.php?s=&threadid=4400&highlight=sync