Is lossless/uncompressed direct to disk even possible?
just wondering out loud here.
in order to capture 1920x1080p24 @4:2:2 lossless/uncompressed, you would require: 1920*1080*24*24bits per second=142.382812 MBps i haven't read about many SSD's with that write speed and the ones that come close are extremely expensive and can't interface w/cam. 7200rpm hard drives can write upwards of 60MBps and 140ish if you have raid0. most of the tapeless solutions use a compression codec to drop information in order to fit the needs of portability. say, you do get a dual raid0 7200rpm 2.5" laptop drives that can achieve 150MBps, can you simply use vegas to capture 1080p24 uncompressed or do you still require additional programs? |
We are currently writing 3.2 Gbps to an array of 8, 2.5" drives in RAID 5, inside of an ICON (http://colorspaceinc.com/icon/) media pack.
|
wow, how portable is that? do u need a backpack?
|
No backpack needed, it is battery powered and weighs about 10 pounds.
|
Quote:
1920x1080x20(bits)x24(frames/sec) = 124.4 MBytes/sec as you should capture in YCbCr 10-bit color space, not 8-bit RGB (which I assumed you were using for your calculation). We will offer an uncompressed option this Fall to our portable solid-state recorder Flash XDR. The record time in uncompressed is not long (8 minutes with four 16GB cards), but Flash XDR is very portable (about 2 lbs) and very rugged. You can also record at 160 Mbps I-Frame only MPEG2, which is very close to lossless (visually). |
All times are GMT -6. The time now is 06:11 PM. |
DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network