View Full Version : s35mm & 35mm crop? downscaled vs Redcode
01-04-2007, 12:32 AM
is this right?
downscaled mode (9.5 megapixels) shoots at 35mm?
what is the crop factor of 35mm?
s35mm is 1.5x... 35mm is ???
Redcode 25fps in 1hr = "101250GB"
Downscaled 25fps 1080p 1hr = "13GB"??? (i get this number from the transfer rate of HDV miniDV to pc and that could be way off)
thnks & regards.
01-04-2007, 05:43 AM
The Redcode is way off... 101250GB is 100 Terrabytes, you'd need a truck to hold the storage devices alone. The following numbers aren't final by any means and will probably change but not dramatically I'd imagine:
1 minute of 4k Redcode @24fps would be 1.62GB
1 hour of 4k Redcode @24fps would be 97.2GB
320GB Red Drive should hold roughly 3 Hours and 20 minutes of data
Easiest way to think of it is 100GB is an hour basically and thats the kind of benchmark to be working with.
4k 16:9 = 9434880 pixels (4096 x 2304)
1080p 16:9 = 2073600 pixels (1920 x 1080)
Therefore if the ammount of pixels being recorded at 1080p is 22% of 4k we can likely assume that data size is about the same percentage. So 1080p might look something like:
1 minute of 1080p Redcode @24fps would be 356MB
1 hour of 1080p Redcode @24fps would be 21.36GB
320GB Red Drive should hold just under 15 Hours of data
Shooting at 25fps will alter the numbers a bit obviously
Checkout this Visual Sensor Format Comparison (http://www.dvxuser.com/V6/showthread.php?t=64685) (By Proteus) to see the size of S35 and 35mm on the Red Sensor.
01-04-2007, 06:01 AM
But don't forget 1080p is RGB, so you have 3 channels. Therefore it is more like 66% the amount of data not 22%. So you need to multiply all your 1080p numbers by 3.
01-04-2007, 07:33 AM
Mike Curtis over at HDforindies speculated about this here:
various screen grabs from his Excel sheet of projected data rates and storage requirements here:
It's worth a read.