Gamma Guide

[Jerry Hofmann]

Well that’s beginning to change with Snow Leopard FWIW…

But Mac’s have traditionally displayed gamma at 1.8 and PC’s at 2.2 So this means that if you used a pre Snow Leopard OS, what appears on a Mac as being OK, will appear on a PC as being too dark. That issue has been what’s been around. HOWEVER… if you’d used h.264 as a codec, it’s smart enough to know if it’s being accessed by a PC so changes the gamma automatically. Other codecs didn’t do that…

Does this help?

Jerry

Apple Certified Trainer

Author: “Jerry Hofmann on Final Cut Pro 4” Click here

8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO, CD’s

[Dan Daube]

Here’s some info and really a history of how this all started especially relating to Snow Leopard:

https://blogs.adobe.com/jnack/2009/09/why_your_web_content_will_look_darker.html

Here’s what gamma is from Chris and Trish Meyers:
https://help.adobe.com/en_US/AfterEffects/9.0/WS44E9CED2-117D-4c19-879E-D553BB88B886a.html

Some more adjustment info from Apple:
https://support.apple.com/kb/HT2026

We’ve dealt with the issues for some time working with broadcast video which is basically working in the 2.2 gamma in most instances. So trying to get a true representation with monitors especially as we move more into the file-based world can be a little daunting-hope this helps!

Dan Daube
Director-Editorial Turner Studios Atlanta
Manager Multiple Systems-FCP 7.0.1 AJA Kona

[Eli Mavros]

Thanks for the insight guys. Jerry, strange thing is, a co-worker is claiming to be having some gamma issues he thought he had solved, even though he is running Snow Leopard. Dan, helpful articles…I actually just had to deal with this whole gamma problem when working on a Turner project! Think we got it all squared away for that one, just looking to get a grasp on this whole thing for future projects.

Thanks,
Eli

Eli Mavros

[Paul Figgiani]

Check this out as well:

https://support.apple.com/kb/HT3712

-paul.

[Gary Adcock]

[Eli Mavros] “Jerry, strange thing is, a co-worker is claiming to be having some gamma issues he thought he had solved, even though he is running Snow Leopard. “

I am going to bet that they upgraded to Snow rather than a clean install.

When users upgrade FCP workstations to Snow, the QT gamma bug persists since the upgrade does not remove the older version of QTPro.

if you do not trash all of the older QTPro pref files, and then trash QT 7 ( the QT7.app will be in the Utilities folder) and reinstall ( i had a serial number- not just the QTPro Free that comes with FCS)

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows for the Digitally Inclined
Chicago, IL

https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php

[Sam Featherstone]

Hi Gary,

I did exactly what you mentioned, installed FCS3 on Leopard, upgraded to Snow (some months later) and appear to still have the gamma bug.

I can’t seem to find any more information on deleting QT7 and its prefs on the net, well at least not in reference to this particular issue. Perhaps you could point me to a forum post that I’m missing or tell me more specifically what files need to be deleted?

Thank you for your help,

Sam