Puzzling audio synch problem

[lxndr]

Apologies if this kind of question has already been asked but I have a very long video (3 hours 49 mins) which I believe was sold on 2 DVDs. Someone has apparently encoded each DVD as a single avi of around 1.5Gb. Both parts individually play fine and the audio is in synch. However, if I join then using virtualdub in the way that I normally do, i.e.

load first avi and forward to the end.
load second avi using "Append AVI segment".
set both audio and video to Direct Stream copy
save the new joined AVI using "save as avi".

.. then I find that the second half of the newly joined video is ever so slightly out of synch, slight but noticeable. In this particular case the audio seems a fraction ahead of the video.

I've not come across this problem before and was wondering why it's happened and whether there's a way of avoiding it ?

Thanks in advance for any help

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[setarip_old]

Hi!I have a very long video (3 hours 49 mins) which I believe was sold on 2 DVDs

You might want to RE-read the "Announcement" at the top of the "Newbies" sub-forum, as well as all of the Forum Rules (particularly #6) - especially since any member providing assistance here might also be "struck"...

[lxndr]

Hi!

You might want to RE-read the "Announcement" at the top of the "Newbies" sub-forum, as well as all of the Forum Rules (particularly #6) - especially since any member providing assistance here might also be "struck"...

I've already read it .. it's not relevant .. I own the DVD in question .. 2 versions in fact .. the abridged and the full version ... so you can rest easy. I was primarily interested in the technical issue which presumably you either don't know the answer to or are simply more interested in making veiled accusations than helping people.

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[setarip_old]

There was, and still is, nothing veiled about my suggestion that you re-read the rules. Your statements that:I have a very long video (3 hours 49 mins) which I believe was sold on 2 DVDsandSomeone has apparently encoded each DVD as a single avi of around 1.5Gb.Clearly implies that you don't own the original, commercial source material...

[foxyshadis]

Even if you own the material, downloaded video discussion isn't allowed here. Screwed up avis aren't really all that interesting if it's possible to redo them anyway, since it's possible to produce broken videos in any number of crazy ways.