AviSynth "Tweak" Script - Guidance Needed

[GMaq]

Hi,
Although I know my way around most MPEG-4 encoders, I'll be the first to admit that my AviSynth skills are wanting, I am using SUPER to do some H.264 encoding and just want a simple "Tweak" script to decrease brightness and increase contrast on some MPEG-1 files, I am using AVSP to create a script and all is well until I try to preview my Tweak settings and I get complaints about my line missing a comma or a right bracket, if I include these, I still get the same error, (Boy I wish my good ole' VirtualDub would do H.264!) If some of you avisynth pros are feeling charitable I could sure use some suggestions or even a sample Tweak script, Thanks in advance.

[Pinstripes23]

tweak(0,1,0,1) <----default

the last 2 numbers are brightness and contrast respectively(in that order).


a sample to decrease brightness and increase contrast would be like:

tweak(0,1,-10,1.5)


brightness can have values from -255 to +255
contrast can have values from 0-10

[GMaq]

Pinstripes 23,
Thank You VERY much, your time and reply are greatly appreciated!!