[mythtv-users] Nvidia DPI 1080x540

[George Mari]

Chris Ribe wrote:
> On 10/28/07, Chris Ribe <chrisribe at gmail.com> wrote:
>> Hello all,
>>       I am struggling to get my frontend to play video correctly on my new
>> TV.   It is a 1080i RPTV that I have working with a custom 1080x540
>> modeline.   When I playback recording or watch live TV, I get horizontally
>> squished video, as if myth believes there are square pixels.
>>
>> I am running last weeks SVN, the most recent Nvidia drivers with a 7200GS
>> graphics card, and I have followed the instructions in several howtos on the
>> wiki, which have lead me to this xorg.conf  (edited to remove irrelevant
>> information):
>>
>>
>> Section "Device"
>>         Identifier      "7200GS"
>>         Driver          "nvidia"
>>         BusID           "PCI:2:0:0"
>>         Option  "NoBandWidthTest"       "true"
>>        Option  "UseEdidDpi"    "false"
>>        Option  "UseEDID"       "false"
>>        Option  "UseEdidFreqs"  "false"
>> Option  "ModeValidation"        "DFP-0: NoEdidModes,NoMaxPClkCheck,
>> NoVesaModes,
>>  AllowInterlacedModes,NoDFPNativeResolutionCheck, NoHorizSyncCheck,
>> NoVertRefres
>> hCheck"
>>         Option   "ExactModeTimingsDVI"   "true"
>>         Option          "UseFBDev"              "false"
>> EndSection
>>
>>
>> Section "Monitor"
>>         Identifier      "51S500"
>>         Option          "DPMS"
>>         DisplaySize     243.84 137.16
>>         HorizSync 15-46
>>         VertRefresh 59-61
>>        Modeline "720hitachi" 79.5 1920 2088 2142 2412 540 572 576 592
>> -hsync -vs
>> ync
>> EndSection
>>
>>
>> From my understanding, the combination of the "UseEdidDpi"  "false" tag,
>> the DisplaySize tag, and the resolution should lead the drive to compute a
>> non-square DPI and video should display correctly.   Unfortunately, this
>> isn't happening.
>>
>> Any suggestions would be greatly appreciated.
> 
> 
> So, I was just googling things like "xorg" "DPI"  and "non square pixels,"
> and one search returned my original message from the archives as it's 2nd
> result.  That was disheartening.
> 
> Anyhow,  it caused me to reread my own message and discover that I said
> 1080x540 when I meant 1920x540.
> 
> So, 1920x540 is the resolution I'm working at, 100,50 is the DPI I'm looking
> for.
> 

I'm not an expert on non square pixels, but when you say the video is 
horizontally squished, does the image not extend all the way to the left 
and right edges of your display?

Are your recordings in 4:3 aspect or 16:9?