[mythtv-users] Raspberry Pi Mythfrontend 1080i Poor Playback with Recent Raspbian OS Image

Peter Bennett cats22 at comcast.net
Mon Apr 10 18:55:26 UTC 2017



On 04/10/2017 01:51 PM, Curtis Gedak wrote:
> I am investigating the state of mythfrontend running on Raspberry Pi
> using MythTV 0.28.1 as the backend.
>
> My video playback is unsatisfactory when using a recent Raspbian OS
> image (2017-03-02).  More specifically I see jaggy lines when playing
> interlaced content such as North American ATSC 1080i recorded
> television.  The issue appears to be poor handling of interlaced
> content.
>
> Video playback with an older Raspbian OS image (2016-02-09) is
> excellent.
>
> All tests used applicable RPi MPEG2 licenses.
>
>
> QUESTION:
>
> Has anyone else experienced this issue with recent Raspbian OS
> playback?
>
> Are there suggestions to address the issue?
>
> In the meantime I continue to use and recommend the older Raspbian OS
> 2016-02-09.
>
>
> BACKGROUND INFORMATION:
>
> In an effort to troubleshoot this issue, I have tested with:
>
>    - Raspberry Pi 2 and 3
>    - MythTV 0.27 and 0.28
>    - Raspbian OS 2016-02-09 and 2017-03-02
>
> The results are consistent per the Raspbian OS image.
>
> Raspbian Image   1080i Playback Results
> --------------   -------------------------------------------------------
>      2016-02-09   Excellent quality with no jaggy edges
>      2017-03-02   Poor playback with jaggy edges when horizontal movement
>
> It appears that my configuration of the newer Raspbian OS image does
> not work well with interlaced content.
>
>
> BACKGROUND INSTALLATION INFORMATION:
>
> MYTHTV 0.28
>
> On x86_64 mythbuntu 16.04 backend:
>    mythtv-backend 0.28.1+fixes.20170309.8f13742-0ubuntu0mythbuntu3
>
> On RPi Raspbian full frontend:
>    mythtv-light   0.28.1-6-g7de03a9-0 [1]
>
> [1] https://www.mythtv.org/wiki/MythTV_Light
>
>
> MYTHTV 0.27
>
> On x86_64 mythbuntu 14.04 backend:
>    mythtv-backend    0.27.4+fixes.20141018.b305eb5-0ubuntu0mythbuntu2
>
> On RPi Raspbian full frontend:
>    raspi-fixes-0.27  0.27.6-69-g41a2a8d [2]
>
> [2]
> http://gedakc.users.sourceforge.net/display-doc.php?name=pvr-rpi-mythtv-frontend
>
> Regards,
> Curtis Gedak
> _______________________________________________
>

Have you tried some of the alternative deinterlacers? In the Video 
Playback setup there are some 10 deinterlacers available for selection. 
The default one for OpenMax is Advanced(HW), but maybe there is another 
one that will work better in this case.

Peter



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