[virt-tools-list] virt-viewer raspberry pi monitor mapping

[Jarrid Graham]

I will look into the piwall thing, it kind of leads me back to what I tired
to do starting out with using ffmpeg to capture the whole display and send
it, but had a lot of issues actually getting that to work, after looking at
countless examples that work for everyone else kind of thing . Then I
stumbled on the SPICE driver with multiple monitors and got closer but then
the road block I was talking about before.

I was also hoping to have the display processing mostly handled by the VM
server and not have to client CPU overhead with a capture running, going
back I did get it to work have to run a encode per display and get decent
quality but it adds about 33% CPU use on the VM just sitting there.

I dont know if it is possible to decide which display it chooses when you
use the -f parameter on remote-viewer or if it would do what I wanted if
the machine I was running it on had 2 screens anyway haven't actually tried
that yet.


On Tue, Oct 23, 2018 at 5:59 AM Victor Toso <victortoso at redhat.com> wrote:

> Hi,
>
> On Mon, Oct 22, 2018 at 10:48:06AM -0400, Jarrid Graham wrote:
> > Hi,
> > What I am trying to accomplish is using multiple raspberry pi
> > units , one for each monitor of a multi monitor windows VM. I
> > have read there is an option to allow more than one spice
> > connection per VM
>
> You mean https://www.spice-space.org/multiple-clients.html ?
>
> > but I was hoping to be able to map monitors say on the first pi
> > 1:1 and on the second 1:2 kind of thing but it knows there is
> > no second monitor on the pi and says my mappings are invalid
> > and ignores them.
>
> Even if you tweak that, you would be receiving data from all
> displays, I think.
>
> > I have tried many things to make a second display on the pi to
> > fool the software but that doesn't seem to work either.
>
> It wasn't design with this kind of usage in mind
>
> > I have tried to search for information on this but have had
> > little luck. I know I am using an older versions on virt-viewer
> > package  4.0 I think due to trying to compile newer versions of
> > spice-gtk seem to have issues with a newer libssl I think.
> >
> > I have been banging around on this a bit and maybe I am looking
> > at this wrong, I am not really to worried input as these are
> > only for display.
>
> You could have a client to connect on the host and having this
> client to split the data to all rpi instead. You could even
> consider playing with video walls, splitting one 4k display in 4
> full-hd ones, etc.
>
> Nothing like this is implemented but lots of work is already done
> by GStreamer, in case you want to play with it.
>
> Cheers,
> Victor
>
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