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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
denition and high denition video.
Uncompressed 10 bit YUV (4:2:2)
Standard Denition
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 Denition
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 Denition
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 uctuations 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 uctuation 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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