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Intensity pro uncompressed capture and not matching colors

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Thomas Calzone
Intensity pro uncompressed capture and not matching colors
on Jan 6, 2014 at 8:26:49 pm

Hello,

I own a blackmagic intensity pro capture card. I'm still learning and was wondering if one could achieve a perfect uncompressed capture of some input.

This is my setup: Computer1 Nvidia output -> Computer2 Intensity pro hdmi input.
To the naked eye it looks uncompressed but when analysing pixels closely there is some noise or color differences.

Same results with both 720p@60 and 1080p@30. I tried with blackmagic media express and VirtualDub 1.10.4
I can spot those differences in a video captured with bm media express, and in the preview window of virtualdub (not even recording)

VirtualDub settings: Video -> Compression... -> "(No recompression: HDYC)"
Video -> Set custom format... -> Custom size 1920x1080 / Data format: HDYC YUV 4:2:2 interleaved (Rec. 701) (only working data format)

Does anyone have any idea about some options or else that would cause this?

Tom


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Thomas Calzone
Re: Intensity pro uncompressed capture and not matching colors
on Jan 7, 2014 at 2:56:02 pm

It's actually the 4:2:2 subsampling that bothers me. Is there any card that will capture hdmi raw rgb input with 1080p@60 ? (4:4:4 I guess?).

I need at least yuv 4:4:4 for preview mode in virtualdub, not necessary in file capture mode.


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