audio out of sync

[hilario]

See if someone can give me a clue on this problem:

I have 2 video files of a musical concert , with part 1 and part 2.

I'm trying to join them on Virtualdub.

I can do it after correcting problems with audio on both files.
When I hear files separated (after corretion of audio) both are playing fine, but when I join them the part 2 is out of sync !!!

Any ideas ???

[guns1inger]

Try using something else to join them. I like AVI Demux for joining, and generally find the results much better than with virtualdub.

It may also depend on the format of the video and, more importantly, the audio for the two files. Can you post a mediainfo or g-spot output for each file ?

[manono]

Any ideas ???

Find out how much the 2nd part is out of synch when joined. Make that second part go out of synch by the same amount. It'll play out of synch by itself but when joined with part 1 the whole thing will be in synch.

[hilario]

Thank you all:

guns1inger was right.

Avidemux did it .It's ok now.