Blackmagic Design - Leading the creative video revolution
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Windows XP
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Storage and data rates for
uncompressed video
The data rates for uncompressed video are quite high, and listed below are
minimum recommended disk requirements for uncompressed standard
definition and high definition video.
Uncompressed 10 bit YUV (4:2:2)
Standard Definition
Frame Size
MB per second MB per minute GB per hour
720x486/29.97fps 27
1 600
94
720x576/25fps
26
1 582
93
High Definition
Frame Size
MB per second MB per minute GB per hour
1280x720p/60fps 141
8 438
494
1920x1080/24PsF
127
7 594
445
1920x1080/50i
132
7 910
463
1920x1080/60i
158
9 482
556
Uncompressed 10 bit RGB (4:4:4)
High Definition
Frame Size
MB per second MB per minute GB per hour
1280x720p/60fps 211
12 656
742
1920x1080/24PsF
190
11 391
667
1920x1080/50i
198
11 865
695
1920x1080/60i
237
14 238
834
Due to disk seeks, when calculating the data rates required for your disk
system, it is a good idea to add a safety margin due to fluctuations in disk
speed. The degree of margin can be reduced by adding more disks.
Serial ATA (SATA) disks can reduce to half their speed as they become full, so
in a 2-disk SATA array you should aim for a 100% safety margin. In an 8-disk
SATA array, a 30% safety margin should be adequate. SCSI disk arrays seem
to display less fluctuation and so a 20% safety margin should be adequate for
an 8-disk SCSI array. Generally the more disks in the array, the better.
Note:
Although other vendors and third parties may provide different data rates
for uncompressed video, the above recommendations are tested for use with
Decklink cards.
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