Juan Salvo
Forum Replies Created
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RAW decoder works. But not everything. Your best choice is to debayer in Sony RAW Viewer for right now.
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I think codex might be the ones who need to fix.
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C500 raw by chance?
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Hi Jef,
I’m afraid you’re mistaken. Any frame with a title or a crop or anything else that needs to be rendered in FCP, has the entire frame go through the entire processing path, not just the pixels under the title. The entire frame. This is the case regardless of codec used.
One thing for the OP to keep in mind is that the issue of generational loss has been with us from the very beginning of film production, all the way through video to the present day and on into the future. And if anything the present standard for both compressed and uncompressed codecs are the best we’ve ever had for the purpose they serve. You are, for example, far better off with 10 generation old ProRes 4444, in my opinion, than a ten generation old film print.
Here is one of my favorite things on the Internet. Though now slightly out of date, Marco Solario’s codec test page is a great resource for understanding what multiple generations, even within the same codec will do to an image.
https://codecs.onerivermedia.com/
One thing Marco hasn’t tested is the ProRes flavors, which I suspect would hold up remarkably well.
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Might need to upgrade your red rocket driver and firmware.
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[Jef Huey] “In the case of the OPs question, if the image is not re-sized or repositioned at all and the codec type was not changed (same frame size, frame rate and codec type) – then there will be no “loss” because there is no resampling of unaffected pixels. Adding black at the top and bottom of the frame will not change the pixels in the inside of the black mask. That is the nature of an uncompressed codec. Each pixel is handled individually. “
Not so I’m afraid. DaVinci and most other apps work in RGB, ProRes 422 and Uncompressed 4:2:2 codecs store information in YUV. Doing any processing at all, or in some cases just running it through the app, will result in a resampling cycle. Now, like I said, the degradation of said cycle is minimal. But it DOES occur.
One of the few exceptions is a situation like an FCP project where the source content, sequence setting and export codec all match. And there is no processing needed on the entire frame. In which case FCP can just pass through the frame data. If any processing is done at all (including a crop the image) then the entire frame is sent through the processing path.
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It’s a very marginal loss. You’d have to go probably dozens of generations before you could see any degradation in most viewing conditions. But even uncompressed codec cycles are lossy. Anytime you’re resampling an image, or doing any processing to it, something is lost. That shouldn’t be alarming though. Going 2-3 gen on ProRes 422HQ is not a big deal. A bigger issue is the crappy quality of FCPs scaling.
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Resolve can easily add blanking to any desired aspect ratio, and also do repositions as needed. I’d recommend doing this in the color session, as Resolves scaling is far superior to that of FCP, plus you’d do your scaling, cropping and color in one codec cycle.
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Sounds like your power supply is failing, I would imagine 4 690s at full blast would approach 1400W, considering the Cubix Desktop 4 is rated for 1200, i think we can guess where your problem lies. The new Xpander Desktop Elite is rated for 1500W, btw.
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Upgrade to 10.8.2 or 3. You’re on 10.7.5 using an AMD card.
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