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Proper output of 2048x1152 RGB files to tape

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Eugene Lehnert
Proper output of 2048x1152 RGB files to tape
on Mar 22, 2011 at 4:50:05 pm

I have a 2048x1152 RGB file that I need to output to an HDCAM. Usually when I have 2048x1152 ProRes material the Kona 3 card does a straight downconvert to 1920x1080. But this RGB material is output at it's native resolution pinned to the top left corner and I am getting a gamma shift. What are the proper settings for outputting this material to tape?



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gary adcock
Re: Proper output of 2048x1152 RGB files to tape
on Mar 22, 2011 at 5:41:41 pm

[Eugene Lehnert] "I have a 2048x1152 RGB file that I need to output to an HDCAM."

HDCam does not support frames larger than 1920x1080.

HDCamSR only supports beyond 1920 x1080 recording on the 5800 Series deck with a specific add on package.

http://news.creativecow.net/story/859317

gary adcock
Studio37

Post and Production Workflow Consultant
Production and Post Stereographer
Chicago, IL

http://blogs.creativecow.net/24640



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Eugene Lehnert
Re: Proper output of 2048x1152 RGB files to tape
on Mar 22, 2011 at 5:50:38 pm

I understand. I'm trying to output 1920x1080. It seems to work if I turn the "mirror to desktop" button off.

Thanks.



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Eugene Lehnert
Re: Proper output of 2048x1152 RGB files to tape
on Mar 22, 2011 at 8:03:21 pm

Well it's outputting but there is aliasing in the image. It looks like the Kona card is using an impulse like algorithm to downconvert the picture. When I render a section as ProRes 4444 instead of RGB the picture outputs ok. Odd. Contacting AJA.



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Jeremy Garchow
Re: Proper output of 2048x1152 RGB files to tape
on Mar 23, 2011 at 12:29:25 am

Just curious, but why not nest your 2k in a 1080 YUV ProRes 422 HQ sequence? Why try and retain 2k/RGB when you're going out to single link 1080 video tape?

If that's not feasible, it sounds like you might have the wrong 2k settings selected? There's more than a few to choose from.


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