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Jonathan Alberts
transcoding times
on Oct 5, 2009 at 2:12:40 am

hi

in trying to plan my post workflow i'm trying to get a sense of how long my transcoding times will take and there is wildly divergent information out there (naturally it depends on processor speed/codec & settings)

but i'm trying to to find a ball park figure or at least some kind site or whitepapers that have some of this information.

I know the faster the processor the faster it will be but say i had an 8-core macpro 2.66 processor shooting 4K 16:9 and using RED RUSHES to go to Prores Proxy or Prores LT....or to DNxHD 36/115

i've seen numbers anywhere from 6:1 to 20:1 and that's a pretty wide range.

any pointers in this direction would be helpful, thanks.


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Noah Kadner
Re: transcoding times
on Oct 5, 2009 at 2:41:38 pm

Varies too widely to give you even a ballpark. I'd suggest running some tests on *your* system so you really know. REDRushes and tons of test R3D footage are just a google away. 20:1 sounds a little long though, I'd say more like 3:1 to 5:1. But it also depends on other factors like how much debayer quality you add, etc.

Noah

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Russell Lasson
Re: transcoding times
on Oct 6, 2009 at 4:48:05 am

[Jonathan Alberts] "I know the faster the processor the faster it will be but say i had an 8-core macpro 2.66 processor shooting 4K 16:9 and using RED RUSHES to go to Prores Proxy or Prores LT....or to DNxHD 36/115 "

This really depends on what type of debayer you do. Full debayer is insane render times. Half high would probably put you at about 4-7 fps. Half Standard would probably get you around 6-9 fps.

But it also depends on how you set up the cores of the computer. Is this one of the new computers that can do hypertheading? (Nehalem?)

I'll just add that the REDRocket is very cool:)

-Russ

Russell Lasson
Colorist/Digital Cinema Specialist
Color Mill
Salt Lake City, UT
http://www.colormill.net


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Jonathan Alberts
Re: transcoding times
on Oct 6, 2009 at 3:06:48 pm

[Russell Lasson] "This really depends on what type of debayer you do. Full debayer is insane render times. Half high would probably put you at about 4-7 fps. Half Standard would probably get you around 6-9 fps.

But it also depends on how you set up the cores of the computer. Is this one of the new computers that can do hypertheading? (Nehalem?) "


I was thinking of going Half Standard (which i realized I didn't put in my original thread, oops). It's funny because I was shown a few tests (not being able to test myself at the moment) and it looks like Half Standard is better quality than High Standard. Anybody else get these results?

Yes, this would be one of the new ones like "nehalem". But how does one go about 'setting up the cores' to make things work most efficiently?


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