What are the system requirements to color correct 4k red with Apple Color

[Morisato]

Hi. I'm mainly concerned with the needed drive speeds for color correcting in 4k but any additional information would be helpful. Do I need fibre channel drives or will eSATA work? I looked up the spec requirements on the color page, but there wasn't any answer to this.

Also, here is my expected workflow with this film I'll be working on... if you have any comments or suggestions, please let me know.

Shoot 4k with red
Copy media from red drive to raid
Duplicate media from raid to storage
Convert r3d files to ProRes422 HQ for offline edit
Create dvd dailies from ProRes files (can I create dailies from r3d?)

Edit in ProRes422 HQ
Lock picture
Conform back to original red media
Send to color
CC in 4k in Apple Color
Export to DPX
Print DPX to film

Is this the recommended way to go?

 

[Loren White]

I believe you're going to want something that can do 500MB/s.

You usually start reaching those speeds with an 8 bay raid via mini-sas. (eSata wont reach that speed)

 

[Will Keir]

Conform back to original red media

How are you planning on doing the conform?

 

[Paul Jay]

I believe you're going to want something that can do 500MB/s.

You usually start reaching those speeds with an 8 bay raid via mini-sas. (eSata wont reach that speed)

Why? I don't think you need those speeds for R3D or ProRes HQ 2K
Datarates are less important with processor intensive formats like R3D.

Get a good graphics card like 4870. And enough ram.
Just as important.

 

[Paul Jay]

How are you planning on doing the conform?

Clipfinder
Log and transfer
Or even Cinema tools is an option.

 

[Torrey Loomis]

I believe you're going to want something that can do 500MB/s.

For .R3D files which are around 28 MB/s, you don't need something that does 500 MB/s.

Figure out how many concurrent streams you might be editing at once and then multiply by the ProRes codec data rate you want to use. Then add 10-15% for a buffer, and you should be fine.

Torrey
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[Loren White]

Sorry, I was thinking 4k DPX.

Just get a 4870 and a new Mac Pro and you'll be fine.

 

[Jesper Kodahl]

If you edit in the new ProRes (Proxy) your files will take up even less space and your hard drive throughput will only be around 5,5 Megabytes/s for a 2K image and it actually looks acceptable for editing. Colorgrading, though in 4K is only one stream of R3D which is about 28Megs tops. So even though an internal SATA drive should do the job I'd still recommend something a little more secure like a mirrored or level 5 RAID.

Just be aware that you don't consider the "duplicate from RAID to storage" solution as your back-up.

If there's a problem with the copied files you will just copy the problem to your back-up.
Copying two times from the original material on the RED drive doesn't eliminate a potential problem but it gives you a second chance at getting undamaged footage.