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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

REDCODE 42...

Jannard said:
RC 225 is a massive amount of data. Probably a ton of overkill. But will be useful when shooting 5K at 100fps.

Think data rate divided by frame rate.

Jim
Click to expand...
OK, now I'm really confused. The original Scarlet 3K design was said to support a data rate of up to 100 MBps, presumably to accommodate reasonable compression at 120 fps. After the redesign, Redcode 42 was officially given as the top quality level. On ScarletUser Jim Jannard explained it as follows:

Jannard said:
The RED ONE has a current maximum of REDCODE 36.

REDCODE is a reference number to maximum data rate of the camera electronics. If you shoot higher frame rates, the data rate doesn't go higher than the maximum. Hence, a higher number REDCODE will do less compression at higher frame rates.

Despair not... features are being shot now on REDCODE 36. And a smaller sensor innately has less data rate so REDCODE 42 is a VERY good number for 2/3" Scarlet.
Click to expand...
This means that 42 MBps is Scarlet's top data rate. If RC 225 is overkill for the 5K Epic but useful at 100 fps (I presume to maintain reasonable compression rates), wouldn't a higher-than-42-MBps data rate be equally useful for the 3K at 120 fps? Why was the 100 MBps maximum rate dropped? Have the Redcode algorithms been so improved since April 2008 as to make 100 MBps unnecessary at 3K?
 
Lawrence Bansbach said:
(snip)This means that 42 MBps is Scarlet's top data rate. If RC 225 is overkill for the 5K Epic but useful at 100 fps (I presume to maintain reasonable compression rates), wouldn't a higher-than-42-MBps data rate be equally useful for the 3K at 120 fps?
Click to expand...

Just a guess but one of the differences between the upmarket Epic and the (in a relative sense) mass market Scarlet might be maximum data rates. I would think that heat handling, processing power, bus speeds and a host of other things could be smaller and cheaper if the max data rate was lower.

I would also suspect from the notes provided by Jim and other members of the Red Team, that a pretty tasty image can be written at 3K rez, 120fps and a "mere" 42 MBs data rate (336Mbits) due to the ever better optimized RedCode wavelet codec.

Cheers - #19
 
Any upgrade I am happy as it always gives more and better looks for my work :~>
 
What kind of playback rates are you guys getting in REDAlert 21 on Mac OSX? I'm getting around 1-2 fps... is this normal?
 
zak forrest said:
so is Redcode 42 only for 4.5k footage? is that why the bitrate increase? or does it benefit all aspect ratios? like will 4.5k look much worse if its shot at redcode 36
Click to expand...

See Shawn's tests...

Jim
 
Tim,

I'm using a RAID. Have you tried Build 21 with RC42 and if so what kind of playback are you getting? I just want to have a clue of what normal playback rate is for RC42 especially on a system like mine. I'm on Snow Leopard 10.6.1, Mac Pro Nehalem 8 core 2.93GHz with 6GB RAM and a RAID 0 scratch drive. The H Proxies are playing back at 12 fps in QuickTime 7.
 
Stacey Spears said:
Given the quality of RC28 vs. RC42, I am sure I will get some flack for asking this. :) Any chance we will see a REDCODE lossless mode for still pictures? (mathematically lossless)
Click to expand...

Much higher data rate for stills at lower frame rates.

Jim
 
Jannard said:
Much higher data rate for stills at lower frame rates.

Jim
Click to expand...

Interesting approach... Sounds interesting. Don't suppose you could throw a bit more of a bone in terms of what kind of frame rates we're talking about?
 
Is varispeed available for RC42? I've had difficulty enabling the mode on RC42...
 
Andrae Palmer said:
Tim,

I'm using a RAID. Have you tried Build 21 with RC42 and if so what kind of playback are you getting? I just want to have a clue of what normal playback rate is for RC42 especially on a system like mine. I'm on Snow Leopard 10.6.1, Mac Pro Nehalem 8 core 2.93GHz with 6GB RAM and a RAID 0 scratch drive. The H Proxies are playing back at 12 fps in QuickTime 7.
Click to expand...

Hi andrae, we have a very similar system. Will post results after tomorrows
tests... thanks for patience. Been crazy around here and havent had much time to test as we would like.

What RAID are you using? We have the new MA EVO 2K and its awesome
especially for the REDUSER price.

cheers
 
Tim Whitcomb said:
Hi andrae, we have a very similar system. Will post results after tomorrows
tests... thanks for patience. Been crazy around here and havent had much time to test as we would like.

What RAID are you using? We have the new MA EVO 2K and its awesome
especially for the REDUSER price.

cheers
Click to expand...

Tim,

Thanks! I have the new Apple RAID card with 4 SAS drives. Looking to get an external config too.
 
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