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Milky Blacks

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David Bouhs
Milky Blacks
on Feb 7, 2015 at 3:14:00 am

New to Avid.. Why are my clips coming in with such milky blacks?

Here's a comparison shot between the files Avid brings in and the originals playing in QT: http://i.imgur.com/eIzeriY.jpg


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Michael Phillips
Re: Milky Blacks
on Feb 7, 2015 at 3:47:01 pm

MC 8.3 now offers different color space views of the source/record monitor and one of them takes "video 16-235 (8 bit terms) and scales it to 0-255 as one of the settings. You can also look to source settings when AMA linking to the files and go to to the color tab and there you can manipulate the range or add a LUT to get proper display.

Another variable in all of this is that QuickTime X is not the best tool to judge by as it tries to make things look good rather than correct and will do its own manipulation of color. There are many many threads that speak to the QuickTime gamma issues out on the Internet.

Ultimately, MC is a Rec709 editing system at heart (slowly changing) so a properly calibrated HD monitor with I/O is going to be your real viewing canvas (not to mention scopes).

How does this same file compare when opened in Resolve?


Michael


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David Bouhs
Re: Milky Blacks
on Feb 7, 2015 at 6:13:58 pm

Opening up clips in Resolve has the clips looking the same way they do as when I open them up in Quicktime or FCP/PP.


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Michael Phillips
Re: Milky Blacks
on Feb 7, 2015 at 6:27:24 pm

With that out of the way, look at my other comments in using "source settings".

Michael


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David Bouhs
Re: Milky Blacks
on Feb 7, 2015 at 6:33:21 pm

On that source settings page, if I select the "gfx-video level" drop down menu and choose "expand video levels to graphic levels", the files look like the originals. But if I export from there the blacks are too black. If I export the files with the milky blacks, without changing any source settings they look normal in the final file. The same files look fine all the way through in FCP7 and PP.


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Michael Phillips
Re: Milky Blacks
on Feb 7, 2015 at 6:35:50 pm

Once you've set the levels the way you want them, export as 709, not RGB as that will add yet another scaling operation making blacks blacker and whites whiter.

See: http://www.jobterburg.nl/Publications/601_709_RGB.pdf

Michael


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