[mythtv-users] FireTV 4K vs. Shield TV for mythtv frontend and Leanfront

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Thu Sep 17 12:05:52 UTC 2020

On Wed, Sep 16, 2020 at 02:44:17PM -0500, David Engel wrote:
> >
> > I guess it doesn't bother me since I don't know what to look for.  I mostly
> > record HDTV OTA MPEG2 stuff from my antenna connected to an ATSC tuner like
> > HDHR.  All of the stuff I watch is with mythfrontend or leanfront and I
> > think it looks as good as with my PC with Nvidia GT1030 gfx card.
> If you had the problem, you'd definitely notice it.  You'd also see it
> on your GT1030.  It sounds like you're lucky and none of your local
> channels are using the encoder parameters or encoders that cause the
> problem to show up.

I have been seeing a problem like this for quite a while but
I was putting it down to glitches in the tv cards or something.
It was always a puzzle because I have decent signal strength
and I see it on all tuners (dvico, leadtek usb, hauppage quad).

Let me list the symptoms to check

 - DVB-T transmission (PAL)
 - 7MHz channel width
 - MPEG2 video
 - Nvidia GeForce GT 710
 - Content mostly 720p, some 1080p, no 4k
 - v29 for the moment
 - current playback profile is 'slim' but I see similar things
   with other profiles like vdpau or opengl

Still a match?

  create a hybrid, palyback profile that does mpeg2 decoding
  in software and the rest with mediacodec.

Not sure how to go about creating a custom playback profile.
https://www.mythtv.org/wiki/Playback_profiles looks like the
place to start...guessing the steps are
 - make a new playback group
 - tweak the profile so Decoder is 'ffmpeg' for all resolutions
 - not sure what's next

Any hints?

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