Visual Circuits H-DVP, User Manual

Page: 52 / 89

Troubleshooting
42
Q. I get a test pattern on the screen, but my MPEG file still
doesn’t play correctly. Why?
A. The H-DVP software may be having trouble detecting the
audio and video program IDs in the MPEG file. If you know
the PIDs, you can set them manually with the
mpgSetAudioPID and mpgSetVideoPID serial commands in
the HDCom application. See Setting the Program ID on
page 13 for instructions on setting the PIDs in the HDServe
application.
Q. The lip sync feature is not working on my files. Why?
A. Several settings in the Windows NT
®
Registry can affect the
lip sync feature. Start the Regedit applet and set
HKEY_LOCAL_MACHINE\SYSTEM\
CurrentControlSet\Services\VCChd\Parameters\disablesy
nc to zero. Restart the VCCHD driver. If the lip sync feature
still does not work properly, try modifying
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet
\
Services\VCChd\Parameters\freeTime in increments of 50.
Each time you modify the freeTime entry, restart the VCCHD
driver.
Q. The cross-channel synchronization feature is not working on
my files. Why?
A. Cross-channel synchronization will not work unless all of the
channels are playing. Furthermore, all of the files that are
playing must be the same size and have the same time stamp.
If you are using a serial controller, you must issue the
mpgSyncChannels command to create a synchronization
group, and you must issue the mpgPlayAll command to play
the synchronized group.