Help with decomb a special .m2v please!

[TNM]

I dunno where to ask this so I just ask in this forum. Sorry if wrong place :)

I got a 2 minutes 30 fps .m2v movie clip ripped from a PS2 game. When I load it into DVD2AVI, it showed me that the clip was pure NTSC and Interlaced. I made a test avs script and load into VirtualDubMod but I didn't see any interlaced artifacts so I thought the clip can be IVTC. I used decomb filter by Donald Graft in the avs script with following commands:

Telecide(post=false)
Decimate(cycle=5)

And encoded the movie clip into Xvid. The result was a video/audio out of sync file :(

Can anyone please tell me what was wrong in my method or wat should I do to properly IVTC the movie clip? Thanks a lot :)

[KF]

You have to run pulldown on your ivtc'd file so that the dvd player can play back the file at the correct framerate and hence remain in sync.

[DJ Bobo]

@ TNM
If you don't see any combing and the playback is smooth, it is true 30fps. Don't do IVTC, don't deinterlace. Keep it 30fps.

The synch issue is not related in any way to IVTC or not IVTC, you've done something wrong when ripping or muxing audio: forgot delay? muxed AC3 without making proper settings? mpeg2 or 2.5 encoded mp3?

[TNM]

@DJ Bobo

I guess you're right. When I didn't do anything and let the fps be 30, everything is fine, the audio sync issue is gone. Thanks :)
The original audio format is .wav. I encoded it seperately to mp3 and mux it into the video using VDudMod while encoding so I think there's nothing wrong with that :)