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 best methode quality wise?
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martijn76
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Joined: 28 Sep 2007
Posts: 8

PostPosted: Tue Oct 09, 2007 10:28 pm    Post subject: best methode quality wise? Reply with quote

quick question (bet you never get those Smile)
we shot with red

found out that when using the qt ref file's in fcp they upgrade if colour is changed in radalerd

my question is :

for broadcast i need to deliver digibeta pal

im thinking anamorphic is the way to go

im thinking set sequence to 1920x1080 sq pix
import my qt 2k ref file's set them to 100% small overlap left en right (2048-1920=128 pix) en little black bar on top and bottom (1080-1024=556 pix)

now export to 10 bit unc 422 pal




2-1 aspect ratio is not 16-9 (16-9 being 2-1.125) putting my ref file's in a 1920x1080 sequence @100% wil make them 16-9 anamorph when renderd to pal

my boss disagrees about this methode because we lose little frame on left and right (he's also dop:))

i think it's the way to go because there is as little manipulation as possible pixel wise?


questions

is it okay to render from the ref file's? if yes does it make any diffence what compressor is used in the seq renderd from?

in other words does rendering the R3D file's to 4k tiff first get's you better quality when there's only downsizing to pal involved?

thanks a bunch

martijn
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Joined: 14 Dec 2006
Posts: 1640
Location: Los Angeles

PostPosted: Sun Oct 14, 2007 11:36 am    Post subject: Reply with quote

Hello martijn,

Thanks for joining the site.

Great questions. I think you are on the right track. I have yet to really get into testing that particular workflow. Hopefully sometime in November/December, RedCamCentral will have direct access to a camera and we will be able to do many tests and answer those questions better.

Anyone else that has experience with that workflow, please chime in.

We will try and update this when we can. Also, martijn, please post any updates to this, if you get more info from another source.

thanks,

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martijn76
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Joined: 28 Sep 2007
Posts: 8

PostPosted: Sun Oct 14, 2007 1:27 pm    Post subject: more info from red forum Reply with quote

hi there,

from rob lohan i gor this response:

1) your method seems okay

2) the QuickTime reference files are high-quality (with the grade codec installed), but not ultra high-quality. Whether they are good enough depends on your footage, quality wanted versus time to process. The QT codec does not do a proper downconvert from the footage, so you may see a bit of aliasing or stair stepping (more so on the 1K than the 2K for example). If this is a problem (check before assuming it is), then you need to do:

3) highest-quality is through RED ALERT exporting a 16-bit 4K tiff/DPX and then down sample / crop that to your output resolution
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cheers

Martijn

p.s. i think shake is the way to go for color corecting on buget sinds radalert is 8 bit and shake is floating point (it's also quik in handeling 4 k tiff's, when the clip is done i will post a link)
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martijn76
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Joined: 28 Sep 2007
Posts: 8

PostPosted: Sun Oct 14, 2007 1:33 pm    Post subject: Reply with quote

floating point aka 32 bit Smile
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