[mythtv-users] Video quality on 0.28 worse than it was on 0.21

[Peter Bennett]

On 08/23/2018 12:33 PM, Allen Edwards wrote:
> Using the same settings on the new 16.04 install I have bad tearing 
> when the boards pan on Jeopardy where I did not on 8.04.  As far as I 
> can tell, everything is the same. I still have the 8.04 HD, which has 
> serious issues but will play so I am able to compare the silky smooth 
> performance of 0.21 to the jerky performance of 0.28
>
With Nvidia it helps to turn off composite to prevent tearing.
sudo nvidia-xconfig --no-composite
or else add this to your xorg.conf.
Section "Extensions"
     Option             "Composite" "Disable"
EndSection

Note that turning off composite prevents Ubuntu unity desktop from 
working. I use xubuntu to avoid that problem.

> Most things are the same as described below.  The differences are that 
> I am aware of are that the new driver is 304 (which I confirmed is in 
> use with additional-drivers) and the 8.04 system used 180.
>
> The other difference is that on the 16.04 system the nvidia-settings 
> icon does not launch anything. It is just like clicking on air. I 
> Googled this and found several people with the same problem and nobody 
> with an answer.  Maybe the problems are related
>
> The hardware is a M3A with AMI 5400, Geforce 6200 LE video card.
>
> I put the same xorg.conf file in /usr/share/X11/xorg.conf
>
> I created the same custom playback profile
> If rez > 0 0 -> ffmpeg & XVideo
> xv-blit softblend
> Bob(2x) Linear blend
>

For general picture quality you would do better to use VDPAU slim 
playback profile if possible, or failing that, use OpenGL Slim.

> I have dual displays only one has myth.  Here is its xorg.conf section 
> from the 2008 file I transferred over to the new disk.  I rebooted 
> after loading the xorg.conf file
>
> Section "Screen"
>         Identifier      "Screen1"
>         Device          "Videocard1"
>         Monitor         "MythMonitor"
>         Option          "TwinView"      "0"
>         Option          "metamodes"     "DFP: 1280x720_60 +0+0"
>         Option          "AddARGBGLXVisuals"     "True"
>         # this next line will be ignored with the TV and the default, 
> auto will be used
>         SubSection "Display"
>                 Depth   24
>         EndSubSection
>         Defaultdepth    24
> EndSection
>
>
> This list has been tremendously helpful on my other problems so I am 
> hopeful I don't have to go back to 8.04 although at this point I can 
> make a case for doing that.
>
> Allen
>
>