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Gamma shift when exporting MP4

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Jason JammerGamma shift when exporting MP4
by on Nov 21, 2014 at 9:35:02 pm

I know this is a known issue, but I have yet to see a viable solution.

Working off PC and exporting via Adobe encoder.

When exporting H.264 in an mp4 container, there are significant gamma shift issues that void several hours/days of color correction work. It really washes out the color. I have viewed these exported mp4's in quicktime and VLC on multiple computers and the issue is still present.

Quicktime MOV exports seem to be fine, it is only when exporting H.264 mp4.

Some have mentioned changing the NVIDIA settings which seems to be an internal fix for that monitor, but I am exporting video's that will be going on the web for distribution. I really need consistency across all media platforms.

This is a very big deal that needs attention and hopefully a fix is in the works if it is not already out there.


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Tero AhlforsRe: Gamma shift when exporting MP4
by on Nov 22, 2014 at 7:20:55 am

[Jason Jammer] "I have viewed these exported mp4's in quicktime"

Do not view color critical stuff in Quicktime. It just can't show gamma properly.

[Jason Jammer] "I really need consistency across all media platforms."

The only way you can get close to color consistency is if you are making a movie that is graded in a proper suite and shown in theaters with calibrated projectors. There is zero way you can ensure consistency on the web because you can't control how people have set up their monitors. Is it warm? Is it cool? Is it green?

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Tavita TataRe: Gamma shift when exporting MP4
by on Jan 19, 2015 at 11:26:31 am

I'm currently having this same problem and am trying to find a fix. Found threads that have solutions for FCXP but not Adobe. I'm kind of surprised at how difficult it is to find useful information on this known bug in the H.264 codec. I tried a utility called Quicktime Gamma Stripper that's supposed to strip the gamma tag from the H.264 file to prevent the player codec from altering the gamma but the program errors when I try to use it. Does anyone know of a fix for this infuriating issue.

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