Hauppauge WinTV USB - Manual (Page 31)

image size frames/second bytes per second 1 minute video
160x120 15 frames/sec 425 Kbytes/sec 26 Mbytes
320x240 15 frames/sec 850 Kbytes/sec 52 Mbytes
320x240 30 frames/sec 1.7 Mbytes/sec 104 Mbytes
Video consumes quite a bit of hard disk space! At 320x240, you will only be
able to store about 10 minutes of video on a 1 Gigabyte hard disk!
To reduce the amount of hard disk space used by your digital videos, you can
edit the video using one of the popular 32-bit digital video editors (such as
Adobe’s Premiere or U-Lead’s MediaStudio). After editing, you can compress
the video using a software playback format such as Indeo or Cinepak (both of
these are supported by Windows98). Typical compression achieved by these
formats is 30:1.
Tips on improving capture performance
Do not use DoubleSpace or any other disk compression scheme! This severely
slows down your hard disk.
Turn off screen savers and do not connect to a local area network.
Most professionals capture video and audio separately. This allows them to “lay
down” the audio track on top of the video tracks while editing. Capturing video
separately will increase the performance of your video captures.
There are several hard disks on the market which are designed for higher per-
formance video captures. These drives use 1:1 interleaving and track caching
to eliminate gaps caused by a hard disk drive seeking to the next track. They
are available with both IDE and SCSI interfaces.
WinTV-USB
Installation and Reference Manual
3-5