[mythtv-users] How to stop OSD overlay resizing and showing jagged fonts ?

Dave dave at 0bits.com
Mon Feb 12 14:01:35 UTC 2007

Hi all,

Last niggle for me to sort out, and i've have tried and tried. Am i 
doing something wrong ? If i haven't read some wiki or doc, please point 
me to it and call me names.

My setup:

  VGA (d-sub) from a NVIDIA GeForce 7100
  Sony V series lcd, set maximum 1366x768 pixels

I've set the vga res output from the nvidia card to be 800x600 and i've 
setup the correct "DisplaySize" in xorg.conf so 'xdpyinfo' shows i'm 
correctly using 100x100dpi

   htpc ~% DISPLAY=:0 xdpyinfo |grep -i resolution
     resolution:    100x100 dots per inch

Now i have a TT S-1500 DVB card and when watching TV, some channels 
which are displaying a reasonable non-HD resolution (720x480) picture, 
the OSD when i'm browsing or get channel info, is *perfect*, the fonts 
are smooth and look fab.

However tuning to a lower SDTV res image (380x252) the TV picture is 
scaled to fit my TV size (fill is the scaling so it fills the screen) 
but it appears the OSD overlay is also scaled to be in the right 
position as before, but this scaling makes all the fonts and other OSD 
components horrible and jaggy.

Now i know because it is a budget DVB card (i think) i'm not supposed to 
get a /dev/dvb/adapterN/osdN device that i assume is the OSD overlay 
device, so we're doing it in software, but is it really this bad in 
software ? Is it not possible to do true OSD overlays ontop of the TV 
picture in Myth ?

Have i not set up some compile option when building myth ? Or perhaps 
not enabled some nvidia option in xorg.conf or is this what others are 
experiencing too ?? Am i alone in seeing this ?


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