Matrox Electronic Systems G450 MMS - Manual (Page 28)

28 Matrox G450 MMS – User Guide
Video
The following troubleshooting items address problems related to video files.
Problem Video file playback is jerky (skipping frames)
1 Cause Your hard disk may be too slow.
1 Solution Try defragmenting your hard disk.
Windows 2000 – To defragment a hard disk, click Start " Programs (or All Programs ) "
Accessories " System Tools " Disk Defragmenter .
2 Solution If possible, try using a faster disk.
3 Solution Make sure the drive you’re using (a hard disk or DVD drive) is using DMA (if your drive
supports DMA transfers). To use DMA:
Windows 2000/XP –
1 Click Start " Settings * " Control Panel " Performance and Maintenance * " System
(double-click*) " Hardware " Device Manager . (* Depending on your version and
configuration of Windows, this part of the step may not be necessary.)
2 Double-click the IDE ATA/ATAPI controllers list item to expand it, then double-click the
name of the appropriate controller.
3 Change each Transfer Mode setting to “ DMA if available ”.
4 Click OK to accept the changes.
Note: Jerky video file playback may be the result of slow playback or recording. Slow
recording causes frames to be dropped (frames aren’t recorded). If jerky video is caused by
frames that were dropped during recording, the problem can only be fixed by recapturing
the video under better conditions.
Tip: If your computer has more than one hard disk, you may get better results if you play
back or capture video files with a disk other than the one where the Windows swap file is
stored. The Windows swap file is usually stored on drive “C:”.
WARNING: Not all drives support DMA well. For more information, see the
documentation that came with your hard disk.