[mythtv-users] MythTV Raspberry Pi2 frontend testers

[Mike Bibbings]

On 27/11/15 20:46, Lawrence Rust wrote:
> On Tue, 2015-11-24 at 15:04 -0500, Peter Bennett (cats22) wrote:
> [snip]
>> I am using analog audio in all cases.
>>
>> I retested eglfs and compared it to xcb. I am using a 1080i recording.
>> See attached file mediainfo.txt for info about it.
>>
>> eglfs - Jerky playback on a 1280x1024 DVI screen and using analog audio.
>> xcb - smooth playback, no jerkiness in this case
> I'm missing something.  I've tested a number of videos, monitors &
> resolutions and haven't see any jerkiness with eglfs playback.  So a
> small favour, would you run a test with the most jerky video that you
> have and post me the mythfrontend log with '-v playback --loglevel
> debug' args.  It would also be extremely useful to test a video that
> causes problems so is it possible to download it from somewhere?
>
>> Overscan settings in config.txt fix this for most applications, but not
>> for MythTV frontend.
>> eglfs - overscan settings seem to be completely ignored.
>> xcb - overscan settings are partially used, the width of picture is
>> reduced but the position is still top left so you  lose the top and left
>> of the GUI and get extra space at the bottom and right.
> OK, I believe that I've fixed the video window positioning problem
> together with a number of other problems.  I've posted a new build here:
> http://www.softsystem.co.uk/download/mythtv/mythtv-v0.27.5-80-g65d2de0-RPI2.tar.bz2
>
> I've also updated the fixes-0.27-rpi2 git branch and updated the
> mythbuild.sh script:
> http://www.softsystem.co.uk/download/mythtv/mythbuild.sh
>
> Finally I've added a master-rpi2 branch and a build here:
> http://www.softsystem.co.uk/download/mythtv/mythtv-v0.28-pre-3207-g1678991-RPI2.tar.bz2
>
> [snip]
>
>> I have a remote that uses the keyboard media keys. I use the "Setup
>> Keys" part of frontend setup to assign them appropriately.
>> eglfs - One media keys is not detected at all (STOP) and the others work
>> but with different codes from x-windows.
>> xcb - All media keys work.
> There's little that Myth can do about keystrokes - it's a Linux/Qt
> issue.  Maybe Qt 5.5 is better.  I'll look at adding support for Qt 5.5
> shortly.
>
> I use lirc to map my remote keys from the event codes produced by the
> kernel into keycodes for Myth.  I've found that more reliable over
> kernel and Qt upgrades.
>
>> OSD
>> eglfs - OSD works smoothly
> Expected - it uses h/w overlay.  Hence my desire to use eglfs by
> default.
>
>> xcb - OSD causes jerkiness
> Expected - it uses CPU blending.  Unfortunately Qt doesn't support
> mixing EGL surfaces (h/w accelerated) with Qt's own xcb derived windows.
>
>> Subtitles
>> I am not seeing subtitles with either xcb or eglfs.
>> With normal front end on a particular show I get a choice of ATSC CC1
>> Subtitles or VBI CC1 subtitles. Either of these shows the same
>> subtitles, I don't know why two are shown.
>> With Raspberry Pi frontend I only see ATSC CC1 as a choice. Selecting it
>> says "Subtitles enabled" but they never appear on the screen.
> I believe that the problem is a missing libass-dev package.  It's an
> optional lib that's used for certain types of subtitle - I've never seen
> a difference in the UK so it must be an ATSC issue.  The new
> mythbuild.sh adds this lib and is included in the updated build.  You
> will need to install libass4 on the RPi to use this.
>
>> Because of the issues with the display cutting off and the media key for
>> "stop" not working, xcb is preferable to me right now. I am using it
>> with an analog TV so there is no jerkiness whether I use eglfs or xcb.
>>
>> Attached is my config.txt file.
> You will get a nice performance boost by adding this to config.txt
>
> arm_freq=1000
> core_freq=450
> sdram_freq=467
> over_voltage=2
>
> It's quite a conservative over-clock and works on all the RPi2's I've
> come across.
>
>> Let me know if there is anything I can do to help.
> Any feedback on the revised build would be appreciated.
>
> -- Lawrence Rust
>
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For the jerky playback it might be the firmware version on the pi.

Mine is :
pi at raspberrypi-2 ~ $ /opt/vc/bin/vcgencmd version
Sep 23 2015 12:12:01
Copyright (c) 2012 Broadcom
version c156d00b148c30a3ba28ec376c9c01e95a77d6d5 (clean) (release)

If you have an earlier version, it might be worth doing:
"sudo apt-get update" followed by "sudo apt-get upgrade" at the command 
prompt, and then rebooting

Mike