[mythtv] MythTV Raspberry Pi2 frontend testers

[Lawrence Rust]

On Wed, 2015-12-09 at 15:37 -0500, Deacon Patrick Ouellette wrote:
> On Tue, Dec 08, 2015 at 07:19:27PM +0000, Lawrence Rust wrote:
> > 
> > While on the efficiency tack, I've been able to tweak the OpenMAX
> > decoder to share buffers with the video renderer.  This avoids a CPU
> > buffer copy.  A 1920x1080 frame occupies ~3MB so @ 30Hz this avoids
> > ~100MB/s of CPU copies.  In my tests this lowers CPU overhead by around
> > 8% for SD and 15% for HD.
> > 
> .
> .
> .
> > 
> > Optionally download the pre-built archives (~100MB)
> > # For Debian wheezy/0.27:
> > wget http://www.softsystem.co.uk/download/mythtv/mythtv-v0.27.5-101-g665ee21-RPI2.tar.bz2
> 
> For a data point, using the pre-built wheezy/0.27 referenced above I
> see some improvement in the eglfs version, but it still stutter
> enough to be unwatchable while xcb is fine as long as you avoid the
> OSD.
> 
> Source video is 720p60 and 1080i30 to a 1080p60 display via hdmi.
> Raspberry Pi2 overclocked to 1GHz.

Pat, thanks for sharing your results.  A small favour, would you repeat
your tests but with the audio output device set to NULL?  I'm beginning
to think that audio decoding may be a limiting factor.

Thanks

-- Lawrence Rust