[mythtv-users] HD playback problem w/ kernel version

[Mark Brown]

Hey, sorry for the delay in responding.  I booted my fc29 front end to
kernel 4.20.6-200 and hd playback was still severely choppy.  I verified
that mythfrontend is indeed using vaapi (m > playback > playback data), but
playback still suffers.  Changed vid scan to progressive as you suggested,
and it improved playback some, but still to choppy to live with.  Rebooted
fc 29 front end to kernel 4.18.16-300, and all is well again, all playback
is smooth and works fine.  For me the problem began late in fc28 when the
first kernel 4.19 came on the scene.  I upgraded the front end to fc29, but
that again only works great when its using the 4.18 series kernel.  Id be
interested in what you see if you put the 4.18 kernel on your fresh fc29
laptop and see if your playback is improved...

Thanks,
-M

On Sat, Feb 9, 2019 at 7:48 AM Tim Draper <veehexx at zoho.com> wrote:

>
>
>
>  ---- On Tue, 05 Feb 2019 13:56:26 +0000 Mark Brown <mbrown at wheelgroup.org>
> wrote ----
>  > Hello all,
>  > Been having HD playback problems with a Fedora 28/29 frontend since
> kernel 4.19.  The problem exists with HD TV (hdhr) or HD video playback.
>  > Frontend version is 29.1-25 and is on an intel nuc, i915 video chipset,
> hdmi out, 'Option "AccelMethod" "sna"' is set, "VAAPI  normal" enabled in
> mythfrontend.
>  > System works fantastic with kernel versions up to 4.18.16-300 but
> anything later in the 4.19/4.20 series and HD playback stutters terribly
> (audio and video).
>  > Anyone seeing similar or have a pointer of where to look?
>  > Thanks! -mark _______________________________________________
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>  >
> you might be onto something here. i too have been having issues.
> when in a HD recording, try menu > video > advanced > video scan >
> manually set 'Progressive'. and see if that improves things.
>
> just tried it on my recently rebuilt FC29 laptop - out of box works fine.
> aside from the fact vaapi isnt enabled on FC29 iso, you have to manually
> install the libva-intel-drivers (and libva-tools why not; 'sudo vainfo' to
> confirm operation) enable the VAAPI decoder in mythtv video playback
> settings and things go wrong.
>
> also had it on primary FE (see thread 'v30 unsmooth playback' recently)
> and a reinstall seems to have fixed it. turns out it could be i dont have
> the vaapi drivers installed on it.
>
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