WMV-HD 2 XviD/AC3

[Easy123]

So, I´ve got this WMV-HD DVD (encoded at 1280x720p with WMAPro 5.1@440kbit) that I would like to reencode to XviD with AC3 Sound. I did the following in Order to achive my Goal:

1. I demuxed the WMV-HD to .WMV and .WMA Files with M$ Stream Editor.
2. I encoded the Video-Stream with the Help of VirtualDub and Avisynth to XviD (1-Pass, Quantizer ~ 3.5). Came out with 3GB and looks fantastic ;)
3. Coverted the WMA File with the help of foobar to 5.1 Wave-File. Used BeSweet to split up the Wave-file to 6 Mono Channels and encoded this to 5.1 AC3 @448kbit. So far everything went nice...
4. Multiplexed both Streams to .avi with VirtualDub and the XviD Files becomes totaly async. It get´s worse the longer the Movie is played. Tried offsets different offset´s for the Soundtrack. Nothing seems to solve my Problem.

Anyone got an Idea if there´s a Tool that shows if there´s an Offset for the Soundtrack in wmv? I don´t remember that there´s an Option for Audio Offset in Windows Media Encoder...

[jstelly]

If the problem gets worse as the file plays then it wouldn't be an offset problem, right? The offset is a one-time thing that happens up front.

[CWR03]

Chances are your audio either demuxed improperly or the AC3 reencode is at an unusable bitrate. I've had similar problems trying to mux MP3 audio at 48000 kHz, but reencoding it at 44100 kHz corrected it. I agree with jstelly, if it gets worse throughout the video, it's not a simple offset problem.