[mythtv-users] MythTV Raspberry Pi2 frontend testers

[Tom Harris]

On Mon, Nov 30, 2015 at 11:19 AM, Dan Wilga <
mythtv-users2 at dwilga-linux1.amherst.edu> wrote:

> On 11/30/15 2:02 PM, Lawrence Rust wrote:
>
>> On Sat, 2015-11-28 at 11:39 -0500, Peter Bennett (cats22) wrote:
>>
>>> On 11/27/2015 03:46 PM, Lawrence Rust wrote:
>>>
>>>> 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?
>>>>
>>> Mythfrontend log with those parameters is here
>>> https://dl.dropboxusercontent.com/u/45325311/mythfrontend.log
>>> This is on the 1280x1280 DVI screen and analog audio. First build (I did
>>> not yet install the new build from today).
>>> In that log, I played the recording from timestamp 11:22:52 to 11:23:22.
>>> During that 30 seconds the audio is choppy and the video jerky.
>>>
>>> The recording is many Gigabytes, so I extracted the first 2 minutes
>>> using ffmpeg. This only extracts video and one audio track, no sub
>>> titles. Playing this 2 minute video through Mythtv Videos gives the same
>>> jerkiness.
>>> The file is here
>>> https://dl.dropboxusercontent.com/u/45325311/News_Extract_2min.mpg
>>>
>> Peter,
>>
>> Many thanks for the logfile and recording.  I can now reproduce the
>> jerkiness that you describe.
>>
>> Unfortunately, it would appear that the problem is largely h/w related.
>> The recording is MPEG2 1920x1080i 30Hz which is saturating the GPU.  The
>> key point is the log lines 'Waiting for video buffers' which indicate
>> GPU overload.
>>
> If all else fails, it might be viable for some users, especially those
> with more modern TVs, to have Myth output at 30 Hz refresh and have the TV
> deinterlace instead of the Pi2. Tvs these days are doing a better and
> better job of it.


Is the video decoding handled differently in X mode?  For me, X Windows
playback of 1080i content was fine in mythfrontend.

Also, I think Kodi uses EGLFS, and playback of 1080i MPEG2 content is
perfect there.
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