AV.io HD User Guide – Optional configuration
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Optional configuration
Your AV.io HD device is ready to use right out of the box; however, there is support for additional configuration
should you need it. Changes can be made to your AV.io HD’s default settings through Epiphan’s AV.io Config
tool.
The AV.io Config tool allows you to change several settings to make changes to your video capture experience
if necessary. Most user’s won’t need to use this utility for anything other than firmware update, but advanced
users may find these tweaks help them get the most out of their AV.io HD.
These settings include:
use input signal resolution;
aspect ratio preservation; and,
performance mode
Input signal resolution
When enabled, your AV.io HD adds the exact resolution of your input signal to the list of supported output
resolutions. This is the only way to enable 1:1 capture for special frame sizes. However it is important to note
that the capture resolution as dictated by the third-party application will override any AV.io HD custom capture
settings. Also note that in selecting this mode, any change in input signal (programmatic or by connecting a
different input) causes AV.io HD to renegotiate its resolution with the application. This can cause an
interruption in the captured stream.
Preserve aspect ratio
When enabled, your AV.io HD preserves the aspect ratio of your input signal by adding black bars to the sides
or top and bottom of the frame if the application using the signal requests a frame size with a different aspect
ratio. For example, with this option enabled, a 4:3 input signal gets black bars added to the sides of the image
when viewed in an application that requests a 16:9 aspect ratio. With this option disabled, the 4:3 image is
instead stretched to fit the full 16:9 size.
Performance mode
When enabled, your AV.io HD enters and exits system suspend mode (i.e. sleep) faster by disabling support for
the Suspend/U3 USB power state. This means AV.io starts working again faster after your computer wakes from
a system suspend state, at the cost of increased power consumption. Disabling this setting is ideal in situations
where power consumption needs to be monitored, such as battery preservation in laptops.
