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10-bit RGB import and export
Can AE 6.5 input 10-bit RGB and render it back out without truncating the bits, or otherwise altering the gamma, basically outputting full 10-bit RGB? If not, will either AE7 or CS3 work for this?
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3 Replies
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Without having a 10-bit RGB monitor, is there any other way to verify if source material is in fact 10-bit RGB?
Thanks. -
Without having a 10-bit RGB monitor, is there any other way to verify if source material is in fact 10-bit RGB?
Thanks. -
Hi Dan, it’s Tyler!
I wouldn’t trust the properties inspector of a file to know if it wasn’t ever 8-bit truncated. In fact, After Effects on OS X with AJA and Blackmagic codecs has had a bug where out-of-the-box it doesn’t enable Trillions+ rendering without truncation.
On a 10-bit scale, you have values 0-1023, but 8-bit only has 0-256. So what you need is an image that has values which you know to be 10-bit, run it through the render engine, and then sniff those pixels to see if they kept the same values or not.
Create some color shapes in AE that have values such as 510x511x512, 254x255x256, etc. Render to your 10-bit codec, re-import the file, and then watch the color values in the property inspector when you hover over those pixels. If it stayed 10-bit, the values won’t have changed. If it was truncated, they would’ve snapped to the nearest 8-bit numbers, which in my example numbers would be 511x511x511 and 255x255x255. The point is, a 10-bit process would retain the slight hue of that almost-grey patch, while in an 8-bit process it would turn flat grey.
Let us know if you have a problem revealed by your test and we’ll hunt it down. And let me know how your movie is coming along!
tyler -at- liquidcompanies.com
Tyler A. Hawes
LIQUID DI
Santa Monica, CA: 310.393.1260
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