[Spice-devel] question: how to test the gstreamer:h264 with qemu ?

[Li, ZhijianX]

> -----Original Message-----
> From: cfergeau at redhat.com [mailto:cfergeau at redhat.com]
> Sent: Friday, July 29, 2016 4:19 PM
> To: Li, ZhijianX <zhijianx.li at intel.com>
> Cc: gouget at codeweavers.com; Spice-devel at lists.freedesktop.org
> Subject: Re: [Spice-devel] question: how to test the gstreamer:h264 with
> qemu ?
> 
> On Fri, Jul 29, 2016 at 08:10:46AM +0000, Li, ZhijianX wrote:
> >
> > > -----Original Message-----
> > > From: cfergeau at redhat.com [mailto:cfergeau at redhat.com]
> > > Sent: Friday, July 29, 2016 3:17 PM
> > > To: Li, ZhijianX <zhijianx.li at intel.com>
> > > Cc: gouget at codeweavers.com; Spice-devel at lists.freedesktop.org
> > > Subject: Re: [Spice-devel] question: how to test the gstreamer:h264 with
> > > qemu ?
> > >
> > > Hey,
> > >
> > > On Fri, Jul 29, 2016 at 03:05:21AM +0000, Li, ZhijianX wrote:
> > > > Hello  guys,
> > > >
> > > > Recently, I found that spice have supported gstremer:h264 encoding, so
> I
> > > want to have a try.
> > > > But I'm not sure how to test this feature(I am a spice newbie)
> > > >
> > > > If I play a h264 encoding video in the guest, how can I *confirm* that
> > > > the gstremer:h264 works or not ?
> > > >
> > > > If I miss something, please let me know.
> > > > Below is my environment:
> > > > Host, Ubuntu 16.04 lts
> > > > 1.  guest
> > > > Win7 +" Red Hat QXL GPU(6.1.0.10020)"
> > > > 2. qemu
> > > > Branch: master + gstreamer related
> > > > patch(https://lists.freedesktop.org/archives/spice-devel/2015-May/0197
> > > > 71.html) Start qemu with " -spice video-codes=gstreamer:h264" options
> > > > 3. spice
> > > > Branch: master(comit: 29caba2)
> > > > Configuration with "--enable-gstreamer=1.0"
> > > > 4. spice-gtk
> > > > Branch: master(commit: 9b82e92)
> > > > Configuration with "--enable-gstvideo=yes"
> > > > 5. spice-protocol
> > > > Branch: master
> > >
> > > Usually I just change default_video_codecs in spice-server/server/reds.c
> so
> > > that it starts with gstreamer:h264.
> > That's interesting  :)
> > More question: Does the spice-client side(remote-viewer) or the guest
> > driver need some special options to notify the client
> > to use the gstreamer:h264.
> 
> Once the streaming code triggers, use of h264 instead of mjpeg should be
> automatic if both the server and the client have the required gstreamer
> plugins.
In addition to hacking the default_video_codecs, it seems that we need to set the qemu spice option 'streaming-video=filter'
Which is 'off' by default, to trigger the gstreamer:h264, right ?

And how the libspice can know the guest is playing a video instead of staying at a static screen, is there a PV driver to
tell the backend ?

Thanks
Zhijian
> 
> Christophe