I'm looking for something like Compiz-style controls for opacity, brightness and saturation which can push values for contrast, brightness and saturation beyond the 100% limit in Compiz. Basically, I'd like something similar to the VLC video effects controls, but for all of X11 or an active window. I suppose the Compiz controls would work okay if I increased the values on my monitor or tv first and then decreased them for each application, but that's a pretty lossy way of going about it (not to mention tedius). I almost never want to actually decrease the brightness or saturation, but a lot of streaming video content is too dark or desaturated, due to heavy compression or other content authoring choices.
Such an option might also help with an application or other flash content which lacks customizable color schemes, but mainly I'm after something that could work with DRM-protected streaming video content. The thing is, the controls on my TV screen are often too slow or not enough to compensate for dark, low-contrast, or desaturated video. Normally the picture is fine for everything else, and there is nothing wrong with my video drivers (intel i915/xorg-intel).
It looks like the Xv attributes that the xattr command handles are more or less what I'm interested in, but Xv options are a little too hardware specific and don't really fit well into the more general scope of applications that something like Compiz can handle: