In avisynth video is darker, why?

[arnie.d]

When I open a videoclip in virtualdub the brightness is normal, but when I make a script for the same videoclip and I open the script in virtualdub the clip is much darker. Why is that and how do I avoid this?

[Anonymouses]

Might want to check out this thread: http://forum.doom9.org/showthread.php?t=78220&page=1&pp=20

[Wilbert]

Search for Colormatrix.