Blackmagic Cameras Forum
How do I prove a camera/codec is shooting 10-bit.
How do I prove a camera/codec is shooting 10-bit.
by Ian Liuzzi-Fedun on Aug 1, 2019 at 9:01:36 am

I'm looking for a way of creating a test to prove that a camera is producing a 10bit image or a codec actually is 10bit. Could I simply print a piece of paper with 1024 gradations of white to black or is it more than that? What would you suggest?




Re: How do I prove a camera/codec is shooting 10-bit.
by Peter Robertson on Aug 3, 2019 at 5:47:38 am

MediaInfo will provide that information.
Cheers
Peter


Re: How do I prove a camera/codec is shooting 10-bit.
by Ian Liuzzi-Fedun on Aug 3, 2019 at 4:01:11 pm

Simply because it is in the metadata means nothing. I want a visual way to prove it.




Re: How do I prove a camera/codec is shooting 10-bit.
by Bill Stephan on Aug 7, 2019 at 7:32:05 pm

Hi Ian,

I suggest shooting a test of a landscape including a large area of sky. Do this near sunset so you have both darker and lighter areas of sky. Shoot some footage in 10-bit, then shoot again in 8-bit. You should be able to see some minor posterization (stairstepping) in the subtle gradations of color in the 8-bit version, while the 10-bit version will preserve the fine color detail.

Bill Stephan
Senior Editor/DVD Author
USA Studios
New York City


Re: How do I prove a camera/codec is shooting 10-bit.
by Ian Liuzzi-Fedun on Aug 7, 2019 at 7:38:53 pm

Decent idea. I was more thinking if someone had an idea of a chart that would work so it's more definitive.







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