[mythtv] New AspectRatio option

Doug Larrick doug at ties.org
Tue Nov 30 23:06:09 UTC 2004

chris.web at tamibrown.com wrote:
> Hi,
> I've been implementing MythTV using Xbox as frontend, and have run into 
> a problem that I believe (after searching google and the various lists) 
> needs to be fixed with a new configuration option. I am planning to add 
> a new 'MonitorAspect' option to the appearance setup section that can be 
> switched between '4:3' and '16:9'.
> The problem basically is that on systems where the pixel aspect ratio is 
> not the same as the display aspect ratio (such as an Xbox displaying 
> 640x480 but stretched to 16:9 when displayed on a widescreen TV) there 
> is no way to tell MythTV that the aspect ratio is anything other than 
> the pixel ratio - that is, there is no way to tell MythTV that pixels 
> are not displayed as squares.
> The existing AspectRatio options (in the popup menu during playback/live 
> tv and the override version in the setup screen) would continue to 
> function - these effectively tell MythTV the aspect ratio of the content 
> it is playing, if it cannot determine this itself.
> This option would be similar in function to the '-monitoraspect' option 
> that can be passed to mplayer. I know that on some systems it may be 
> possible to configure X to return the correct monitor aspect to Myth, 
> however, the X display width and height options are not currently always 
> used by X, and not all video cards/tv output chips will support these modes.
> I'd be very grateful for feedback on this idea before I submit a patch, 
> or please shoot me down if I have completely misunderstood something...

Set the DisplaySize option in your X config.

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