normalize contrast/brightness filter?

[junglemike]

Hi guys, i'm sorry if this was asked before - i didnt' find the answer.
The question is :
are there any filters, that will normalize the contrast/brightness of the movie ? just like ffdshow does it when decoding.
For example if i have very dark movies - i can of course play and adjust contr/bri for each movie manually , but it's not a good solution.
One can also ask "why do i need it"? - since i can correct it later - when decoding alredy converted material (by same ffdshow , for instance)
But the problem is - i'm encoding files to be played on pam (handheld computer) and it has very limited control and has no pp whatsoever. At least i don't know any player for palm platform that something like this.
so what do you say? is there such thing i'm looking for? Sort of normalization for contrast/brightness?

[tedkunich]

There is such a filter for VDub called Autolevels. It can be coierced into working with Avisynth if you need to with the LoadVirtualdubPlugin function.


T

[Mug Funky]

there's "levels" in avisynth, plus "tweak" and "coloryuv". these will all do brightness/contrast operations if you know how to use them.

there's no automatic solution at the moment (i've tried making a kind of dynamics compressor by abusing temporalsoften, but the results have always been a tad unpredictible, and brightness variations of this kind kill compression efficiency, meaning it'll look even worse at palm-pilot type encoding).