Yet another audio sync puzzlement!

[parkan]

I posted this in reply to a guide ("Fixing gradual audio syn problems") but I am afraid it I will not get to many replies there, so I repost:
"Posted: Jul 09 22:31

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I am having this exact problem with converting an MPEG2 file to DivX. I am using the Gordian Knot bundle as well as the FHG-Radium codec and DivX 5.0.2 pro. The source MPEG has perfect sync, however whn I create a project in DVD2AVI the audio file extracted is about 20 seconds shorter than the original 1-hour movie (it's not a dvd rip, just something I captured with my ATI TV-wonder). I follow the procedure described exactly (i.e. I open the sound file in sound forge and streatch it), then encode the video using virtual dub (actually, GKnot does it for me) into Divx, 2-pass and then mux the two together using Nandub (manually). I have heard of problems with raidum codec and I was advised to set interleave to every 500 ms which I did. DVD2AVI also includes the words "delay 156ms" into the filename of the adio file, which I assumed was the delay I should specifiy in nandub. After 2 minutes, I get a file that gradually goes out of sync but then at the very end becomes perfectly synced again (in the middle is off by as much as a couple of minutes). Using the "adjust framerate to match the audio length" yeilds nothing good both with the original sound file and with the one edited according to this method. I am absolutely clueless as on how to fix this and I am already running out of hard drive space, so I need to convert those (I have several more) MPEG2 files to divx. Please help? (sorry about the length of post)."

[parkan]

Anyone?

[CryptKeeper]

try this
might work and might not

don't stretch the audio
leave it as is
and then add that 156ms delay when multiplexing the audio and video

see if it helps

[parkan]

I've tried that- it works ok at the end but in the beginning it is badly out of sync.