[fixed] WMV sync problem (was: Re: Latency When Recording)

[Jakob Rubenson]

Hi

I´m trying to post this in the right thread. We have a pretty good setup with a I7 920 and Vista 32 bit using an Osprey 450 for both sound and video.
Analog video and audio from different cameras.

We have a problem with the audio being 5 frame out of sync from the video when we save as WMV and open the file in our editing suit. When we open the file in our post production software (we use Sony Vegas Video on a PC) the audio is 5 frames off. But, if we play the same WMV-file in mediaplayer, the material is in sync.

If we save as MOV the material is in sync.

My guess is that Vidblaster has a bug regarding saving as WMV and that WMV has some kind of sync system built in that corrects the problem when playing the file.

We use the WMV file to add top and tails and then encode to flash. The end result is a file with the audio 5 frames off.

Here are my testfiles:
informationdesign.se/vidblaster/

And here is a screenshot that tries to explain the problem: