[quote name='Axel' timestamp='1343809697' post='14774']
AdR & alexander, how do you measure GH2 (or any) footage and get to ("when I check it") the values you found?
[/quote]
That's part of the problem, especially with h.264 footage, because many apps scale the luma when they see the h.264 flag in the meta data.
The two methods I've used are:
(1) Open the files in QT7 (which I have heard ignores scaling flags), then take a screengrab and open in photoshop. Use Info Window and Levels histogram to determine luma scale.
(2) Set up AE CS6 with color space of Adobe RGB(1998), and import .mts file, then use Synthetic Aperture for scopes and histograms. (I believe using Adobe RGB (1998) causes AE to import the .mts file without any luma scaling.)
If anyone has better methods, please post them.