Sync problems with captured VHS

[Floatingshed]

I have captured (to HuffYUV) a rather tatty VHS tape. It has several disruptions throughout, frame rolls etc. These have caused the dropping of frames and loss of A/V sync, as you'd expect.

However, I assume that a record is kept somewhere within the avi about dropped frames and audio sync because when I play the captured file in VLC it corrects the sync at every error and stays in sync for the entire 90 mins.

No avisynth source filter I have tried seems to be able to do this, is there one?

Thanks.

[FranceBB]

Uhm... so VLC keeps it in sync? I think there might be an indexer that behaves the same the VLC decoder does.
Which indexers have you tried?
ffms2? LWLibav? LSMASH? DirectShowSource? DSS2?
Also, if you could upload a sample, it would be useful.
I believe that VLC doesn't "corrects" anything, the decoder it uses does.
Last but not least, HuffYUV is a lossless video codec, but what about audio? Is it PCM muxed in .avi?
Does remuxing to something else like .mkv make it worse?

I'm just trying to figure out your issue, but again, a sample would be useful.

[foxyshadis]

Alternately, if there doesn't seem to be a quick method in Avisynth's import filters, you can simply export from VLC to a newly synced file. I'd give VirtualDub2 a shot, too.

[Mounir]

Try avidemux