Losing all sound in Virtualdub after about 2 mins

[tommoynihan]

I captured a 6.7 gig avi with virtualdub 1.4.9 (pal 720x576,25fps,hufyuv, uncompressed audio). Plays ok with windows media player and virtualdub (some jerkiness due to bitrate). Also encodes ok with TMPGenc to mpg file and play fine.

Then I chopped out some small camera errors from original avi with virtualdub (edit>delete section)

Then I created a new avi with file>save as avi (both video and audio in direct stream copy)

This new avi plays as before with virtualdub, but in windows media player, it fails with invalid avi file at about 1.1 gig (of 6.6 gig) or just over 2 minutes of 11mins 30 secs. Up until that point you can scroll backwards or forwards in the file with no problem.

When I encode this new .avi file with tmpgenc 2.53, the video is perfect all through the encode, but the sound just goes silent at exactly the same point that windows media player failed on the avi.

Since cutting a few bits from an avi is such a basic operation, I assume I'm doing something wrong. Can anyone help please ?

[FranckV]

I have been running through the same issue which only appears when using TMPGEnc to encode (CCE does not have the problem).

Only happens when saving as AVI from virtual dub. Saving as segmented AVI fixes the issue but then you end up with 2GB segments which you can merge again after encoding with TMPGEnc using the MPGTools.

I do not know if this is a virtualDub issue or a TMPGEnc issue but since Windows Media Clip player indicates the error as well, I would go for an issue coming from VirtualDub.

So to fix the issue you can:

a - load the file into VirtualDub and save as segmented

b - load the file into another software and save it as AVI again (youcan save as AVI from TMPGEnc).

c - Get the WAV file out of the original AVI from VirtualDub, use TMPGEnc to create the MPEG1 Layer 2 audio (system Audio Only) to get the MPA (or MP2) file, demultiplex the problematic MPG file to separate Video and Audio to get the M2V file and then re-multiplex the M2V with the MPA.

[tommoynihan]

Thanks for the fast response. I wonder if anyone at virtualdub is working on it ?

I'm going to have to try to get CCE, because I've got 20 x 90min Hi8 tapes to get through, in 11 minute chunks, so I can't afford to do lot of editing (and have any other life at all !)