[mythtv-users] Intel i965 video buffers errors on frontend

[evade at internode.on.net]

Hello,
I'm having difficult problems with playback in the frontend version
0.28.1-3 and would love some help please!

I've been building a new media PC which will mainly be used for
MythTV.  I deliberately chose to use intel graphics, to avoid the
trouble of binary proprietary drivers, for lower power consumption and
as no additional noisy cooling fans are required.

I first tried using VDPAU but the frontend refuses to work with it,
erroring out each time with an unhelpful A/V sync error.  (Packages
installed include libva-vdpau-driver-0.7.4-14, libvdpau-va-gl-0.4.2-2
& libvdpau-1.1.1-3 )

So I switched to VAAPI, despite it lacking deinterlacing.  I'm still
having playback problems with stuttering, especially with live TV. 
My PC also has Intel HD audio (Realtek ALC892).

Although playback works, when I enable debug logging I see multiple
occurrences of both:

  I  Player(0): Waiting for video buffers...

and:

  I  Player(0): Video is 3.54437 frames ahead of audio,
                        doubling video frame
interval to slow down.

I've searched the internet, including archives of this mailing list,
and these problems have previously been called driver issues.  Kodi
doesn't seem to have any issues though.  I'm running Fedora 25 with a
recent kernel which should contain the latest stable Intel drivers
anyway.  I'm not sure what I can do?  Do you have any ideas, please?

Thanks in advance!
evade.

---------------------------
Relevant packages:

mythtv-frontend-0.28.1-3.fc25.x86_64 (and local backend of the same
revision)
Kernel 4.11.6-201.fc25.x86_64
    (Using VAAPI: Driver : Intel i965 driver for Intel(R) Skylake -
1.7.3)
libva-intel-driver-1.7.3-2.fc25.x86_64
xorg-x11-drv-intel-2.99.917-26.20160929.fc25.x86_64
---------------------------
Relevant devices:

Intel H170M chipset, Intel i5-6500 CPU with HD Graphics 530
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530
(rev 06) (prog-if 00 [VGA controller])
    Subsystem: Gigabyte Technology Co., Ltd Device d000
    Flags: bus master, fast devsel, latency 0, IRQ 126
    Memory at ee000000 (64-bit, non-prefetchable) [size=16M]
    Memory at d0000000 (64-bit, prefetchable) [size=256M]

    Kernel driver in use: i915
    Kernel modules: i915

Intel "HD Audio" (Realtek ALC892)
00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev
31)
    Subsystem: Gigabyte Technology Co., Ltd Device a182
    Flags: bus master, fast devsel, latency 32, IRQ 128

    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel


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