Lip Sync Problem (xVID audio/video not in sync)

I occasionally have an XivD file that my LG Recorder/Player refuses to play. I have found that running them thru AutoGK solves the problem. Sometimes, however, I lose Lip Sync by doing this. Is it possible for Media Coder to help me? I have never used Media Coder and would appreciate some help.

Thank You

You could use MediaCoder to change a fixed sync problem....that is a sync or delay that is the same through the entire clip. To do that you would use MediaCoders time "Delay" function and delay (or advance the audio). Doing this would require a re-encoding which may make your video look worse.

Thank you for your reply.
While I am unable to play the file on my LG Recorder/Player the file plays without any Lip Sync problems on my computer. When I run it thru Auto GK to limit the screen width to 640 pxl it loses lip sync. I would like to try running the original file thru Media Coder but I can't see how to even start.

Can you please give me instructions on how to do this?

Thanks again.

Most players limit the width to 720 pixels wide, so you would resize to 720xH (keeping the aspect ratio) and copy audio.

also check in MPEG4Modifier to see if these files have square pixels, packed bit streams, B-frames,QPEL, GMC.

The first 2 can be fixed without recoding using MPEG4Modifier. AutoGk just has a setting to make it more compatible with certain players, which basically uses no custom matrices,no B-frames QPEL,GMC.

I believe avidemux can do this. Just load the file, check shift audio (it's right there on the main screen), and type in a number (in milliseconds, most likely it will be in increments of 250). You can preview the result by clicking the play button. When it is in sync, select the right container from the dropdown on the mainscreen, and select "copy" in the audio and the video drop-down boxes. Then click the save button. It will not re-encode so it goes pretty fast and you will not lose quality.

Ref: Ladycoder

Thank You for your reply.

Is MPEG4Modifier a program?
How do I check "if these files have square pixels, packed bit streams, B-frames,QPEL, GM"

Ref: dave0511

Thank You for your reply.

If I unpack the bitstream I get picture gut no sound on Preview.
If I don't unpack then I don't get either picture or sound.

Is their a tutorial that explains what all these various controlls do?


Thanks again