Hello,

I had asked a question of some of your Sourceforge contacts for KVM - Qemu on 
addition of webcam support, specifically the following - and was given the 
following interesting answer.   I would indeed like to hear more about what the 
project is adding to KVM - Qemu to allow video to work with webcams (currently 
I run Fedora 15 as host and Fedora 11 under KVM and while the webcam driver and 
video device shows up in the guest I get no video. Also there is confusion for 
me if the host is supposed to have its webcam driver loaded and device enabled 
or not). 

I was told I could try to add a complete host controller to the guest, but am 
not entirely sure I understand what that means?  Looking for specifics?  Is 
there a suggestion for doing this during install of the KVM guest, or can this 
be done while the guest is running, or otherwise?

Many thanks,
Peter 


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> You need to ask to KVM guys. You should notice that it is not just adding
> ISOC and USB 2.0 support, but also to prioritize the processing of isoc
> packets on a virtual environment, and to provide enough throughput for
> video streams
>
> Can you tell me if KVM will be implementing Webcam support as
> described above - the components missing that need to be
> implemented for webcams to work - in any upcoming version of KVM ?

It's work in progress, but not by me. Please check the qemu-devel mailing list 
archive, specifically regarding recent discussions about EHCI (USB 2.0). Some 
of those threads address isochronous transfer as well.

In the meantime, you could also try to assign a complete host controller to the 
guest to get a webcam working. I tried this a while ago, though the result was 
only moderately well working here.
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