Re: [Qemu-devel] [PATCH] ui/vnc: VA API based H.264 encoding for VNC framebuffer updates

[Gerd Hoffmann]

On 01/10/13 12:19, Alexander Graf wrote:
> 
> On 10.01.2013, at 12:10, Gerd Hoffmann wrote:
> 
>> On 01/10/13 11:37, Stefano Stabellini wrote:
>>> On Thu, 10 Jan 2013, Gerd Hoffmann wrote:
>>>> On 01/09/13 23:18, Alexander Graf wrote: Using libavcodec
>>>> directly is a non-starter as distros don't ship that due to the
>>>> multimedia codec patent mess.
>>> 
>>> libavcodec is certainly available on my ubuntu and debian
>>> installs.
>> 
>> Full version with H.264 support?  Or stripped down, with patented
>> codecs removed?
> 
> IIRC Ubuntu has full support. Also openSUSE has Packman where you
> could get full libavcodec builds.

Fedora has rpmfusion.  But packages in the distro core can't have direct
dependencies to 3rd party repo packages like
packman/rpmfusion/non-free/whatever-it-is-called-for-your-distro.

> But overall, gstreamer is probably the better interface to look at
> here, as it actually provides a plugin architecture that people can
> plug their almost-legal codecs into.

Exactly.  Taking the indirection via gstreamer plugins allows to build
qemu core distro package with H.264 support enabled.  Actually using
that requires the gstreamer plugins (for libavcodec and/or vaapi) being
installed of course.

cheers,
  Gerd