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

[David Jaša]

On Pá, 2016-07-29 at 10:19 +0200, cfergeau at redhat.com wrote:
> 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.

Are we going to use some automagic decision between video formats based
on CPU and network conditions? (We were discussing something in that
vein for image compression in last months).

David

> 
> Christophe
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