* I meant Quicktime (.MOV) not MIV sorry
Some Quicktime CoDecs have built-in fixed Gamma settings based on assumptions from when TV screens were CRTs and you need to compensate for that. The same can happen with pretty much any encoder, though. In AE you would simply use an effect like e.g. Exposure on an adjustment layer or your pre-comp and dial in the Gamma difference before rendering. Otherwise you can try to use color management, though it usually doesn't cater for specifics of encoders, only the color while working on your stuff, so it may only give you a rendition of your input file after it has been modified using the output target specs.
Thanks for responding. So how exactly do I found out how much the Gamma difference is?
Does this only happen in after effects, or does it also in happen in Adobe Pro? And do you know of a video where they address this or maybe offer different solutions. It feels like this is a big deal. And I think its strange that I never heard of this before.
Btw I also noticed something else. The quality changes the moment the video is uploaded into the after effects program. So maybe its a import problem not an export problem. I really hope you can help. Thanks.
there's two gamma settings 1.8 and 2.2. sounds to me like your export is getting the wrong encoded gamma tag and thus rendering lighter.
1. in AE,
Choose File > Project Settings. "Legacy Quicktime Gamma" preference via render queue, not export
2. or use AE's utility profile converter to burn in Rec. 709 16-235 or 0-255 depending on your codec
The effective Gamma can be anywhere from 1 (linear) to 2.6. Most Codecs are built around a Gamma of 1.6, 1.8 or 2.2, since that what the old PAL/ NTSC TV standards used or were the default operating system Gammas e.g. in Windows, respectively. The Gamma function is exponential, so you cannot necessarily just use a linear inverse. Back in the old days when there was that H.264 Gamma shift thing I used to dial in a Gamma of 0.86 to darken my footage and since the encoder would brighten the stuff again, it came out okay. In any case, it's not exact science. A single additional encoding pass like YouTube's own conversion and playing it back in a different player can make your clip look off, so you can only ever tweak it to one specific use case.
legacy doesn't permanently change the video, it creates a gamma tag like "hi," if your player supports it, I should be played back
at this gamma setting. That's why AE's utility profile converter usually is the answer because it "burns" in the correct color and gamma.
Since most video is rec.709, 16-235, and 0-255 create different looks and darken the image so that when uploaded to youtube, when youtube lightens them again,(which is wrong, but oh well), they come out perfect.
instructions to setup color profile converter:
set the input profile to rec.709 16-235
and the output profile to rec.709 "no numbers here"
This will darken your image.
I have also made gamma Lut's that convert 2.2 to 1.8 and visa versa with the free Dispcal software program.