Matrox Electronic Systems LE G450 - Manual (Page 38)

38 Matrox Graphics Card – 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 98/Me/2000/XP – To defragment a hard disk, click Start # 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 drive or DVD drive) is using DMA (if your drive
supports DMA transfers). To use DMA:
Windows 98/Me –
1 Click Start # Control Panel # System (double-click) # Device Manager .
2 Double-click the Disk drives list item to expand it, then double-click the name of the
drive device you’re using.
3 Click Settings , then enable the DMA check box.
4 Click OK # OK # Yes to restart your computer and for changes to take effect.
Windows 2000/XP –
1 Windows 2000 – Click Start # Control Panel # System (double-click) # Hardware #
Device Manager .
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
video files from 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.