Audio schync on divx to Vcd conversion using virtualdub

[Antioch]

Hi. I need a little help. I’ve created some VCD from divx’s avi files without any problems. I use virtualdub v. 1.4.13 (to save the sound as a wav file and to add a subtitle filter using the frameserver mode) and TMGenc v. 2.54.37.135 . The Vcd’s are at reasonable quality and they’ve no problems at all.
Recently I want to convert to Vcd some different divx files (with the DIVXMPG4 V3 video format). The problem is that the sound is not synchronized with the video. The problem occurs in the virtualdub when I open the avi file. It says at the beginning “VirtualDub has detected an improper VBR audio encoding in the source AVI file and will rewrite the audio header with standard CBR values during process for better compatibility. This may introduce up to 59633 ms of skew from the video stream. If this is unacceptable, decompress the entire audio stream to an uncompressed wav file and recompress with a constant bitrate encoder. (bitrate: 139.8 +- 33.2 kbps)”. So far so good, so I’ve save the audio as an wav file (as always in PCM format and with no compression) with an audio skew correction of 59633 ms (as the program said). I’ve made the mpeg encoder with TMPGenc but in the mpg file the audio don’t match (it’s not synchronized with the video stream). I’v tried to save the wav in virtualdub without any skew correction but the effect was the same. The funny thing is that if I play (using Micro DVD Player 1.1) the avi file (the original divx file) as video and wav (the one I’ve extracted with virtualdub) as sound file the audio is perfectly synchronized. But if I play the mpeg file as video and the same wav file as audio with the same program the sound is not synchronized. I don’t know how to do to have a mpeg file with the audio synchronized to burn as Vcd.
I’ve tried to compress the wav file extracted from the avi file (as virtualdub tells in the beginning), but I don’t figure out how to do so.
If someone knows how to solve this problem please help. (e-mail: zeruipelayo@fastmail.fm ).
Antioch

[bugster]

download goldwave from www.goldwave.com and install it. Open your avi file in this and then save out the audio as uncompressed PCM just like you would with virtualdub. The main difference here is that it handles the VBR audio correctly. The use this new wav file as the audio source and your avi file as video source when you encode with Tmpgenc. This should hopefully fix the sync problems you are having.