[mythtv-users] Changing aspect ratio?

Michael T. Dean mtdean at thirdcontact.com
Thu May 3 15:51:54 UTC 2007

On 05/03/2007 09:48 AM, David Frascone wrote:
> My plasma is a 1024x768 display, when I use HDMI or VGA inputs.  (I just 
> ordered a component cable, so this may soon change!)
> Anyway, Right now, HD recorded on different tuners (HDHomeRun -vs- 
> Firewire) seem to have different shapes.  Both *should* have a 16:9 
> ratio, like my TV, but when I get video off of the firewire, I have top 
> and bottom letterboxes.
> I have tried increasing the vertical percentage thingie (settings / TV / 
> Playback / 7th page or so).  A 12-15 or so fixes it perfectly for 
> firewire HD -- BUT -- all other tuners are now cropped.
> Any suggestions?  Could I maybe add a custom setting to the aspects 
> easily?  Would it be a code change, or a settings change somewhere? I 
> don't mind pressing W a few times during playback.

You need to properly specify the display's aspect ratio in X.  This 
means that you cannot specify 100x100DPI (because your display does not 
have square pixels).  This will not be a problem with 0.21 (which 
doesn't need 100x100DPI), but until then, you may see a few places where 
graphics and text don't line up correctly or fonts seem to be the wrong 


and ignore the 100x100DPI parts.  Instead, use 100DPI vertical.  (I.e. 
"DisplaySize 346 195").


More information about the mythtv-users mailing list