conversion using virt dub mp3 freeze

[craigievar]

befopre converting my avi to mpeg i always use mp3 freeze to check for bad frames.(i use gary's avi to svcd 3 step foolproof guide).
occassionally mp3 freeze tells me there are no bad frames when there are bad frames because i get audio sync problems after conversion.
is there any way to find these bad frames besides checking every frame manually?

[andyp1]

there are bad frames because i get audio sync problems after conversion.

Not necessarily , it could be a screwed up file , or if it plays alright before encoding do you extract the audio from the avi and convert it to a .wav , and use the wav as you audio source.
Is the audio ac3 if so you should extract the ac3 file and encode only the video.
There are more causes of bad audio sync than just bad frames. If you scanned for bad frames and it said 'all frames appear good' then I don't know why they shouldn't be all good.