102
Osprey-300 User’s Guide
P
OOR
V
IDEO
Q
UALITY
AT
L
ARGE
F
RAME
S
IZES
Large frame sizes with the deep pixel depth (24-
or 32-bit), or complex format (YVU9 or YUV12
planar), impose heavy demands on the PCI bus’s
data transfer capacity. Our experience is that
some systems cannot handle these formats at
full frame sizes.
Systems vary in their data transfer limits. The
characteristics of the PCI bridge are often more
important than processor speed. If you are
having problems, we recommend that you:
* Use a smaller frame size (480x320 or
less).
* Use a shallower color format (RGB15 or
RGB24 instead of RGB32).
* Try an RGB format instead of a YVU
format, and a packed format instead of a
planar format.
* If you have a choice of PCs for video
capture, try using another system with a
different system board chipset.
M
ULTIPLE
H
ORIZONTAL
L
INES
A
CROSS
V
IDEO
If there are multiple, regularly spaced, horizontal
lines across your video image and your source
material is copyrighted and copy-protected, you
are seeing Macrovision™ copy protection.
The lines can vary in color from yellow to blue
to green. These lines are not present in every
frame of video. There may also be a black band
at the top of the frame.
The Osprey 300 cannot eliminate these video
artifacts. These artifacts will only be present
when you are using a copy-protected source,
such as a high-quality DVD for testing a card.
C
ANNOT
P
LAY
B
ACK
R
ECORDED
A
UDIO
If you have a sound card installed, you should be
able to hear audio when you play back recorded
audio.
* Verify that the volume control for your
playback device is not muted.
* Verify that the selected playback device is
your sound card, and not the Osprey-300
Placeholder device. The Placeholder device exists
in order to handle the situation where there is an
Osprey-300 present without a sound card. Some
Windows applications cannot use a recording
device unless a playback device is also installed.
The Placeholder device cannot play back
recorded audio. You can use the same method
to select playback device that you use when
selecting the audio source.
DV Audio Is Too Slow/Low-Pitched or Fast/
High-Pitched
When the audio input is DV1394, you have to
use the AudioConfig applet’s Preferred Audio
Sample Rate control to match your audio sample
rate to the actual rate of the incoming data. The
two most common formats are 48 kHz / 16-bit,
and 32 kHz / 12-bit. You may have to listen to
a sample of your captured audio to determine
whether the sample rate is set correctly – if the
pitch is incorrect, try the other setting.
A
UDIO
R
ECORDING
C
ONTROL
C
OMES
U
P
W
ITH
W
RONG
D
EVICE
AND
W
RONG
I
NPUTS
The cause of this problem may be that you
currently have or have had previously, a Video
for Windows audio capture driver installed in the
system. The Osprey AVStream install process
normally removes a previous Video for Windows
driver, but if you have multiple Osprey cards
installed you do have the option of running the
Video for Windows driver on some cards and the
AVStream driver on others.
Summary of Contents for Osprey-300
Page 1: ...Osprey 300 User s Guide...
