Can VBR be changed to CBR to put the Audo and Video back in Sync?

[solo_voyager]

This problem has been compounded by the fact that I am new to video.

1. I had 2 video files with AC3 audio that were almost totaly inaudible. So, I used a tutorial here to enhance the audio's volume. I got the first XviD avi file right. Ther second one, I apparently screwed up on by setting it to VBR instead of CBR. I do remember being a bit confused at the time as to what CBR and VBR meant. Now, I think I may have a bit more of an understanding.

2. I tried one of the tutorials to add subtitles and could only get about a 325MB file from the approx 700MB file I started from. I wasn't happy with the resulting file size even though Video and audio are in sync.

3.So, I went to the AuotGK sub-title tutorial, and was able to get 700MB files from that process. The audio is OK at the beginning of the one bad video, but by its end the audio is WAY out of sync running far ahead of the video, 10 seconds+.

4. When trying to fix this problem with VirtualDubMod I get this notice when opening the offending file:

[!] AVI: Variable bitrate (VBR) audio detected. VBR audio in AVI is
non-standard and you may encounter sync errors up to 13902ms when
attempting to extract WAV files or processing the audio in Direct Stream
Copy mode. Full Processing mode is recommended to decompress or recompress
the audio. (bitrate: 193.9 ± 21.0 kbps)

5. When I strip the audio from the oldest file and insert it into the latest file, the sync problem doesn't change.

6. The oldest file I now have is the "fixed" audio avi set to VBR without subs added. Fool that I am, I have deleted the original low volume files I began with. File recovery doesn't seem to be an option any more.

So, my question:
Can the avi file I screwed up be set back to CBR to get the audio back in sync or is it now a throwaway?

[celtic_druid]

You can pad to CBR, but that probably means 320k audio. VBR doesn't mean out of sync audio though. No reason why you can't have VBR in sync. Also converting to CBR may not solve your problem.

[Soopafresh]

Test out this batch file if you run out of ideas. Drag the AVI into the same folder, double click on batch. Original won't be touched. The theory is that ffmpeg.exe will attempt to automatically adjust audio length to match video length.

avi_remux.rar