Try using a different mode for capturing, full dv quality-mpeg quality- preview quality, also this from the help manual
Images are missing from the recording, or the video is jerky.
Possible cause: Your hard disk’s transfer speed is too low.
Solution: When working with some UDMA hard disks, the playback may “jump” when an AVI file is played back at higher data rates. This can be traced back to the fact that the hard disk carries out a recalibration while reading the file, thus interrupting playback.
This problem is not caused by Studio, but is the result of the manner in which the hard disk operates and interacts with other system components.
There are several solutions you can use to increase the speed of your hard disk:
1. End task on background applications. Before opening your Studio product, hold down the Ctrl and Alt keys on the keyboard, then hit Delete. This will open the Close Program window. Click on the individual applications listed in the Close Program window and select End Task. Do this for all applications listed in the Close Program window except Explorer and Systray.
2. Click on Start > Programs > Accessories > System Tools > ScanDisk
3. Make sure Thorough is checked, and click Start (this may take a while).
4. After scandisk is done, Click on Start > Programs > Accessories > System Tools > Disk Defragmenter (this may take a while).
5. Turn off Energy saving features (right-click on your desktop and select Properties > Screensaver >(under Energy… Settings). Make sure everything under Settings for… power schemes is set to Never.
6. Go to Start > Settings > Control Panel > System. Click on the Performance tab, then File System, then the Troubleshooting tab.
7. Click to the left of the Disable write-behind caching for all drives option to select it and click OK.
8. Under the hard-disk tab, set the Read-ahead optimization option to None.
In general, this will result in an increase in the data transfer rate. Caution: In some hard disks, it can result in a decrease in the write rate!
Note: Video-editing programs do not multitask very well. Do not use any other program while making movie (videotape or CD) or capturing. You can multitask while editing.