Visual Circuits H-DVP, User Manual

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37
R
EGISTRY
E
DITING
Configuring the Driver
Windows NT has a registry editor, go to “start>>run>>regedit”:
Then:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Service
s\VCCHD\Parameters
To change a DWORD value double click on it and modify as
required. The driver must always be stopped and restarted before
changes will take effect. This can be done by accessing the
devices through “Control Panel>>Devices”, and stopping and
restarting the device. You may also simply reboot the system.
Remember to record your configuration settings as you make them.
Changing these settings can decrease system performance or cause
your operating system to lock up.
Common Parameters
The most commonly adjusted parameters are as follow (All values
are in hexadecimal):
bJitter = REG_DWORD 0x6400
This value, along with fJitter, help control the tolerance for A/V
sync.
BufferSizePerChannel = REG_DWORD 0x40000
Amount of system RAM allocated for EACH channel. Making this
buffer size small (even 128k) may result in glitches in the video
when the file system data delivery is uneven (depending on the
speed of your hard disk or network.) Must be an even multiple of
64k (0x10000).