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[usb] usb 3.0 bandwidth insufficient

From: Peter Geis
Subject: [usb] usb 3.0 bandwidth insufficient
Date: Thu, 27 Feb 2020 12:39:04 -0500

Good Afternoon,

I have been trying to pass through a usb capture card over usb 3.0 to
a windows vm.
The device requires 90% of actual usb 3.0 bandwidth, as it captures
native 1080p 60fps video.
Unfortunately it seems the qemu usb controller cannot provide this, as
the device fails to provide video at 1080p.

I'm trying to find a way to debug this and have not had much success,
can anyone point me in a direction to check?

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