[mythtv-users] MythTV Raspberry Pi2 frontend testers

[Oz Dror]

That was fixed by installing the 32bit version of libgcc++.so.6 in
the host debian machine.

At the final state of the compilation I get this error:

Error! QtWebkit headers not found

I do not know if I need to install libqt4-dev in the host debian machine
or something went wrong in the compilation of qt5 for rpi.




On Wed, Dec 9, 2015 at 3:43 PM, Oz Dror <odror7 at gmail.com> wrote:

> I followed the directions to compile rp2 mythtv on debian 8.
>
> when I type
>  ./mythbuild.sh -2 -Q 5.4.0
>
>
> I get the following error:
> ERROR - The C cross compiler arm-linux-gnueabihf-gcc is not installed.
>
> But actually  the cross compile is installed as in the directions.
>
>
> When I type
> arm-linux-gnueabihf-gcc --version
>
> I get the following error:
>
> arm-linux-gnueabihf-gcc: error while loading shared libraries:
> libstdc++.so.6: cannot open shared object file: No such file or directory
>
>
> But libgcc++.so.6 is installed. (the amd64 version)
>
> Any help will be appreciated.
>
> Thanks
>
>
> On Tue, Dec 8, 2015 at 12:14 PM, Lawrence Rust <lvr at softsystem.co.uk>
> wrote:
>
>> On Thu, 2015-12-03 at 09:49 -0500, Peter Bennett (cats22) 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,
>>
>> You might like to know that I've improved the RPi OpenMAX decoder by
>> reducing the number of frame buffer copies - saving almost 100MB/s on a
>> 1920x1080p at 30Hz stream.  This should (hopefully) allow you to play your
>> HD streams without jerkiness.  It's not as good as Kodi (yet), but it's
>> getting closer.
>>
>> Download the pre-built archives (~100MB) from here:
>> # For Debian wheezy/0.27:
>> wget
>> http://www.softsystem.co.uk/download/mythtv/mythtv-v0.27.5-101-g665ee21-RPI2.tar.bz2
>> # For Debian wheezy/0.28:
>> wget
>> http://www.softsystem.co.uk/download/mythtv/mythtv-v0.28-pre-3252-g0a0927f-RPI2.tar.bz2
>> # For Debian jessie/0.28:
>> wget
>> http://www.softsystem.co.uk/download/mythtv/mythtv-v0.28-pre-3252-g0a0927f-RPI2-jessie.tar.bz2
>>
>> The jessie build will also run on a Pi Zero.  The Zero can only cope
>> with small SD material (memory constraints), but at $5 what do you
>> expect?  I'm working on reducing the memory footprint of the OpenMAX
>> video renderer and hopefully will have standard SD broadcast TV working
>> on the Zero.
>>
>> -- Lawrence Rust
>>
>> _______________________________________________
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>>
>
>
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