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Mercury playback dropping frames
Hi all
Im editing 4k raw footage from the red one, but getting some very rough playback, especially in quicker pans. My system should be able to handle it through the mercury playback engine, but with no previous experience with it im not sure if this is as good as it gets, or if im doing something wrong. I cannot get any playback at 100% resolution, but at 50% i get something watchable but with this jitteryness. Right now its far short of the demonstrations Ive seen.
I have got the new nvidia quadro 4000 2gig cuda (supported), 3x striped 10k drives (which has to be fast enough?),dual xeon 2.6, monitor connected via display-port, 24gig ram. I have installed the new patch updates for my 4000 card so supposedly my system is ideal for smooth playback.
any help would be awesome as ive got some long hours of editing ahead and would love this to work right.
J
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3 Replies
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I could almost guarantee you’ve never seen a CS5 demo with RED 4K playing out in real-time for any serious stretch at more than quarter-res playback. RAW R3D files are computationally intense to decode and the decode itself is still CPU based, even though CUDA picks up lots of slack in the frame scaling and effects department..
Demos are usually…optimized shall we say?
The only recommendation I might make here is to check your demosaic settings and maybe back off the complexity a bit and see if you can get half res playback to endure for a bit.
The computer hardware is going to be there before we know it…Adobe is just a bit ahead of the curve on this one…
TimK,
Director, Consultant
Kolb Productions, -
Thanks for the reply man, i really appreciated it.
From what i have read demosaic is used to reduce graininess but i have never played with the settings, where do I modify it?
Im working through a 2k monitor (dell u2711 2560×1440) so I suppose if i reduce the resolution to half im not going to see much difference if the footage is set to 50% scale. Currently the jitter only gets really bad through fast pans so its still probably workable. I think the biggest thing is knowing im fully optimized and this is as good as it gets right now.thanks again
J
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Actually “demosaic” and “debayer” are used interchangeably and they refer to the process necessary to “construct” the image from a bayer pattern sensor, which is of course, only really acquires a value for one of the three color channels at every photosite.
The debayer settings are in the RED ‘source settings’, where the metadata interface is with the exposure, color, and OLPF settings, etc.
TimK,
Director, Consultant
Kolb Productions,
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