Recording video - getting an error when trying to open it

[royb]

Recently, when I capture the vizard video (using viz.window.startRecording(...)), I can't open the output video (.avi) file. I get an error saying 'Windows Media player cannot play the file. The player might not support this file type or the4 Codec used for compressing it'. VLC player also can't play it, both with updated codecs. Before, I could record video and watch it later with no problems.
Any idea how I solve it? Maybe I can configure somehow the recording properties so the output file can be opened?
Thanks,
Roy

[Jeff]

Was it working on the same machine with same OS? Have you tried playing the recording on a different machine?

[royb]

didn't help