[mythtv-users] Changing aspect ratio?

[Rich West]

David Frascone wrote:
> Michael T. Dean wrote:
>   
>> 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 
>> size.
>>
>> http://www.mythtv.org/wiki/index.php/Frequently_Asked_Questions#Q:_All_my_fonts_look_like_they_are_the_wrong_sizes.2C_how_can_I_correct_this.3F
>> http://www.mythtv.org/wiki/index.php/Display_Size
>> http://www.mythtv.org/wiki/index.php/Specifying_DPI_for_NVIDIA_Cards
>>
>> and ignore the 100x100DPI parts.  Instead, use 100DPI vertical.  (I.e. 
>> "DisplaySize 346 195").
>>
>>   
>>     
> I made those modifications, but it didn't really seem to do anything.  
> (I checked the Xorg.log file -- the changes did do *something*, but 
> nothing noticable).
>
> HDTV via HDHomeRun looks great, if I change the aspect ratio to 4:3.  
> (Full screen on my 16x9 monitor).  HDTV via firewire has top and bottom 
> letterboxes, and no aspect change removes them.  (Well, I think a couple 
> of the zooms remove them, but also remove most of the picture)
>
> Any other solutions?  I'm guessing my next recourse is to add a new 
> aspect change to the frontend menu.

Perhaps I missed this part, but what is the source for your firewire
HD?  Could it be that the over-the-air (OTA) HD broadcast that you are
getting from your local stations is different than the HD you are
getting from your firewire source (I'm going to guess that it is a
cable/satellite set top box)?

-Rich