PAL to NTSC conversion audio out of sync?

[kalemvar]

Hello everyone.

Just before beginning I'm referring to this guide : http://www.digitalfaq.com/guides/vid...t-pal-ntsc.htm

I've done every steps from the guide without any problem but at the end the video is little bit out of sync. I tried many things with Goldwave without any success until I noticed one thing, after de-multiplex in TMPGEnc. the video file is 0:41:07 long and the .ac3 file is 0:41:05 long. I think this is where the problem is.

Is it normal? Am I doing something wrong ?

Thanks

Eric