in case ppl don't know, you first need to apply a gamma correction to any game footage you capture to get it into the same colour-space as what you'd see looking at your monitor when in game (by default video cards apply a very different gamma setting for games than for desktop stuff [including videos]). whatever you want to do with it after that with any brightness/contrast/clever-effects/etc filters is obviously completely up to you, but an initial gamma correction is needed before all that whatever look you want to achieve.
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