Weird colours after horisontal flip in Virtualdub

[rollanders]

I have a telecined avi video captured by Virtualdub (it seems in RGB888 format). I used Virtualdub to do the vertical flip and saved as avi - same format. I also extracted BMP files and created a new video from the individual BMP-files using Virtualdub. When I open these videos in  Avidemux I just see green stripes and some shadows of the picture. What is wrong? Does it have something to do with the audio channel? I do not need audio so can be removed.

[rollanders]

I found the answer. I saved the video in YUV and it worked OK. It seems that Avidemux can not use RGB88 colour scheme.

[Jan Gruuthuse]

Thanks for sharing this.
Some other formats are not handled by avidemux either, most of these are proprietary designed video codec.