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8 © 2007 VBrick Systems, Inc.
Disk Storage Requirements
Stream recording requires significant disk space. One minute of captured video/audio from a
1.2 Mbps stream (a typical MPEG-1 stream or a high bit rate MPEG-4 stream) requires
approximately 9 MB of disk space. By comparison, 1 minute of captured video/audio from a
5.5 MB per second stream (a typical MPEG-2 stream) requires approximately 40 MB of disk
space. Be sure to have enough disk space free for any intended capture. The amount of disk
storage required depends on the bit rate and the recording time. A rough rule is to allow 1 GB
per hour for MPEG-1, 2.5 GB per hour for MPEG-2, and 500 MB per hour for MPEG-4.
System
Stream Rate
(Bits/sec)
System
Stream Rate
(Bytes/sec)
Storage Required
per Sec.
(Kbytes)
Storage Required
per Min.
(Mbytes)
Storage
Required per
Hour (Mbytes)
1,200,000 150,000 150 9 540
1,800,000 225,000 225 14 810
2,000,000 250,000 250 15 900
2,500,000 312,500 313 19 1,125
2,800,000 350,000 350 21 1,260
Note The Total Bit Rate in StreamPlayer Plus will be different than what is shown in
MPEG-4 settings. The actual rate may be slightly higher than what is shown in
StreamPlayer Plus (due to overhead).