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Windows Media—Windows Media Player will not play a file.
The video size in the file
must be 720 x 486, or 720 x 480, or 720 x 576. The pixel format (
fourcc
code) must
be UYVY, YUV2, or RGB32. Also, Direct X version 9.0c, or newer, must be
installed.
“There is a problem with your sound hardware.“.
The error message “There is a
problem with your sound hardware.“may appear when attempting to access the
Mixer dialog for a Xena Audio Device, if there are no volume controls enabled for
that Device. See the
Windows Media Audio Configuration
topic earlier in this manual
for the remedy to this condition.
“This graph cannot preview!“.
WMCap gives this error message if you attempt to enable
Preview while Windows Media Player is configured for output to Xena. (Please note
that if you have both XenaSD and XenaHS and the Windows Media Player is
configured for output to either board, then neither will be able to Preview to the PC
monitor.)
Audio configuration (embedded audio).
In the Windows Media Encoder audio
configuration dialogs, changing the “
Pin Line
” to one of Xena’s embedded audio
pairs will have no effect. To change between AES audio and Embedded Audio
channels, you must use the full mixer dialog. (See “
Sound Recording controls
”
presented earlier in this manual.)
When to Use the Reference Source Input
Setting the Reference Source to “Free Run” is intended to allow you to use the board as a
stand-alone signal generator, without a reference signal. However, while in free-run mode,
the frequency accuracy may not be accurate enough for some equipment, as the frequency
may be +/- 50 ppm from the desired. Locking the board to a reference source, such as
analog black, or a digital input, solves this problem.
For Capture mode, Reference Source must be set to “Input 1”. The Control Panel does this
automatically, and whatever application you might be using should do this also, but if not,
you may need to do it manually. If a capture in your application does not occur cleanly, try
resetting the Reference Source with the Control Panel.
If Your Application Drops Frames
If you notice that an application drops frames when using Xena, ensure that the disk storage
system and PCI architecture has the speed and bandwidth to keep up. See the
Requirements
topic at the beginning of this manual, and in particular the discussions on “
Disk arrays and
PCI performance...”.
Benchmark utilities are provided on the Xena Installation CD to
measure your system’s performance capabilities.
