VD refuses to play my file? ("cannot decompress to an RGB format")

[phabian]

I editted a movie and saved it as .avi with VD 1.7.8 using full processing (ffdshow XviD for video, Lame MP3 for audio). When I re-open the same move I just saved again in VD and try to play it, it says:

The decompression codec cannot decompress to an RGB format. This is very unusual. Check that any "Force YUY2" options are not enabled in the codec's properties.

Uhm... now what? The avi plays fine in any other player, GSpot says: codec XVID and MS A/V plays fine. I tried to look in the ffdshow decoder settings, but didn't find anything that looks like "Force YUV2" (in the Output tab, at the supported output colorspaces, all four RGB options are checked).

I also tried compressing the avi with H.264 encoder instead of XviD in the ffdshow settings. Doesn't make a difference, resulting avi gives same problem in DV.

Any suggestions??

[LoRd_MuldeR]

If you have installed ffdshow, goto the "VFW Configuration" dialog. Do not go to the "Video Decoder Configuration".
Then go to the "Decoder" tab and look at the "Codecs" page. Set all relevant Formats (especially Xvid) to "libavcodec", instead of "disabled".
Now switch to the "Output" page and make sure that all the "RGB" formats (RGB16, RGB24, etc.) are checked.

Close the window with "OK" and try again. If VDub still complains, it's definitely not using ffdshow to decode your Xvid video...