[mythtv-users] Pixelation with VDPAU and one channel

[John Pilkington]

On 06/07/17 01:32, Gary Buhrmaster wrote:
> On Wed, Jul 5, 2017 at 11:50 PM, Peter Bennett <cats22 at comcast.net> wrote:
> 
>> When watching a recording from this channel with VDPAU decoding, every 15
>> seconds or so there is pixelation on 20% to 50% of the screen. I have tried
>> this on 4 machines all equipped with NVIDIA Geforce 210 and they all show
>> the problem.
> 
> I have this recollection that the GT218 (inside a branded GeForce 210)
> is just "barely" able to perform decode/de-interlace 1080i.  And as this
> (newly) O&O NBC channel may have chosen to encode slightly
> differently as part of the transition, you may have hit some limit with
> that card with that encoding.  If viable, I would try a (gen/rev 2) GT630
> or GT730 to see if the problem persists (for they are (or were) cheap
> and available in low profile silent configs, if you need that).

Last week I replaced an old non-VDPAU nvidia card that used the 
304-series legacy driver by a (cheap ~30 GBP) GT 710 / GK208 fanless 
card using 375.66.  The cpu is a Core 2 Duo at 2.66 GHz and I'm running 
master pre-513 under fc25.  Most of my recordings are SD mpeg2 and the 
main display is via HDMI at 1080p/50 Hz on a Panasonic tv.  The video 
card is synced to that.

When using VDPAU the picture is generally good, but there is a slight 
picture instability during pan/tilt that I don't see when using DLNA on 
the same tv.  Mythfrontend offers better playback controls, but for 
linear playback DLNA seems marginally better.  Of course, there may be 
tweaks that I haven't yet explored.

John P