[mythtv-users] MythTV Raspberry Pi2 frontend testers

[Lawrence Rust]

On Fri, 2015-12-04 at 15:18 +0000, Thomas Mashos wrote:
> On Thu, Dec 3, 2015 at 6:50 AM Peter Bennett (cats22) <cats22 at comcast.net>
> wrote:
> 
> > On 12/01/2015 08:58 AM, Lawrence Rust wrote:
> > > I believe Kodi borrowed from omxplayer which uses a single OpenMAX
> > > pipeline from decoder to video renderer which shares buffers and avoids
> > > copying.  Myth currently requires the separation of the decoder from the
> > > renderer and so causes two video buffer copies - one each for the GPU
> > > and CPU.  For a 1920x1080 frame this is a significant burden that causes
> > > memory contention.
> > >
> > > I will investigate ways of integrating the decoder and renderer so that
> > > they use a single OpenMAX pipeline.  Unfortunately this is not trivial
> > > because of the current assumption that ffmpeg is the only provider of
> > > hardware accelerated decoding i.e. VDPAU, VAAPI, DXVA2 etc.
> > >
> > >
> > Lawrence
> >
> > One thing to bear in mind, in case you are not aware. Kodi has some
> > significant audio sync problems when playing the MPG files that mythtv
> > produces in my setup. Especially after skipping forward or back, the
> > audio sync is sometimes far off. In this regard Mythtv is perfect. So
> > maybe that is part of the reason for the mythtv design. I would not want
> > to do something that lands up with the audio sync problems of Kodi.
> >
> > Note that I tested the Kodi audio sync problem with the mythtv plugin
> > and also playing the mythtv MPG files as videos in Kodi. Both ways
> > exhibit the problem and the author of the kodi mythtv plugin confirms
> > that this is a bug with kodi itself, not the plugin.
> >
> > Peter
> >
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> > MythTV Forums: https://forum.mythtv.org
> 
> 
> Lawrence,
> 
> I've decided to build this only for 0.28, since we already have our
> packaging setup for Qt 5. However we're back to failing builds again. Any
> idea whats causing this?
> 
> https://launchpadlibrarian.net/228619903/buildlog_ubuntu-wily-armhf.mythtv_2%3A0.28.0~master.20151203.989baa7-0ubuntu1_BUILDING.txt.gz

The linker is missing symbols from libEGL so either add it to your
Mythtv configure command line:

--extra-libs=-lEGL

or to libmythtv.pro, after -lGLESv2.

-- Lawrence Rust