AV.io 4K User Guide
Limitations and known issues
Limitations and known issues
This section includes known issues or limitations that affect functionality or usability and ways that you can
work around these limitations.
Affecting all operating systems
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UVC-314
: With the exception of the first capture after system reboot, the very first captured frame is
always green.
o
Workaround
: Remove the green frame in post-production editing. If streaming the captured
video, begin streaming after the initial green frame has already been captured.
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UVC-438
: When capturing from a source at 720p, 50 fps will occasionally detect as 51 fps, and when
capturing at 1600×1200, 60 fps will occasionally detect as 61 fps.
o
Workaround
: None necessary. This often occurs due to inherent inaccuracies in rounding
decimal point fps rate to whole numbers. The reading is still accurate to your expected rate.
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UVC-576
: The grabber does not capture video from monitors with resolutions of 1920×1080p at
144Hz or higher.
o
Workaround
: Resolutions of 1920×1080p at 144Hz exceed the hardware limits of the grabber.
There is no workaround.
Affecting Windows
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UVC-270
: Windows 10: Sometimes, Windows 10 will not recognize the grabber properly when
connected by a Fresco FL1100 USB 3.0 controller.
o
Workaround
: Press the refresh icon to refresh the device list or unplug and reconnect the USB.
If neither of these work, a different USB 3.0 host controller might be required.
Affecting Mac
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Your grabber works best with systems that are running the latest version of the Mac OS. If your system
is running an older version and you experience issues with your grabber, we recommend that you
update your system to the latest Mac OS.
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UVC-613
: VLC doesn't play audio for video that is captured using AV.io 4K when connected to a USB
2.0 port on the Mac.
o
Workaround
: Use another media player such as QuickTime.
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