[mythtv-users] Playback Flickering After Upgrade to 0.28.1

Jay Foster jayf0ster at roadrunner.com
Sun Oct 22 15:47:34 UTC 2017

On 10/08/2017 08:12 AM, Saul A. Peebsen wrote:
> On Sun, 8 Oct 2017 07:38:32 -0700
> Jay Foster <jayf0ster at roadrunner.com> wrote:
>> On 10/08/2017 07:27 AM, Saul A. Peebsen wrote:
>>> On Sun, 8 Oct 2017 07:11:56 -0700
>>> Jay Foster <jayf0ster at roadrunner.com> wrote:
>>>> On 09/30/2017 04:19 PM, Jay Foster wrote:
>>>>> I updated my Intel NUC 7I5BNH frontend from 0.27 to 0.28.1. Now
>>>>> during playback, I get a flickering black bar on the screen (like
>>>>> a vertical blanking field).  I'm using the OpenGL playback (VAAPI
>>>>> is not supported on my HW AFAIK, Intel VGA Device 5926, Intel Iris
>>>>> Plus Graphics 640).  This was not there with 0.27. Anyone know
>>>>> what this is and how to fix it?
>>>> This flickering black line only seems to happen with 1080i TV
>>>> playback. 720P and 480i programs seem unaffected.  Also BD rips
>>>> seem unaffected. Any ideas what broke in 0.28?
>>> You can use vainfo to determine what VA-API modes are supported.
>> vainfo reports:
>> libva info: VA-API version 0.35.0
>> libva info: va_getDriverName() returns 0
>> libva info: Trying to
>> open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva info:
>> Found init function __vaDriverInit_0_35 libva
>> error: /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so init failed
>> libva info: va_openDriver() returns -1 vaInitialize failed with error
>> code -1 (unknown libva error),exit
>> I am not using VAAPI.  Playback was very good with 0.27.  Why has
>> 0.28 broken it?
> You really should consider using VA-API with this hardware, it supports
> even HVEC 10 bit hardware decoding. I wish my NUC had this capability.
I still have no idea how to fix this.  Worked fine in 0.27, but no 
longer with 0.28.  I tried Normal High Quality, and the black flickering 
band went away, but then I have tearing.  I tried OpenGL Normal, and the 
black band went away, but so did the deinterlacing.  While changing the 
playback profiles, I also noticed that the on screen pop up background 
color changed from black (I think) to a cyan color.  No idea what caused 
that either.

VA-API is not an option, since there is no driver support for my hardware.

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