[mythtv-users] auto frame rate change

[Hika van den Hoven]

Hoi Jason,

Wednesday, November 18, 2015, 11:19:46 AM, you wrote:


>> Hoi Jason,
>> 
>> Tuesday, November 17, 2015, 7:40:25 PM, you wrote:
>> 
>>> I have a mixture of 50/60/24fps recordings/videos and at present my
>>> xorg.conf file is set up to auto change the screen res accordingly as
>>> per the myth judder free entry in the wiki, and it does a fine job
>> 
>>> However, due to the nature of how my screen hands 24fps, I'd prefer 
>>> that
>>> 24fps to be broadcast as 60fps and have messed around in the xorg file
>>> to try and do this but failed miserablly. Is it even possible?
>> 
>>> I can at present, manually change the res in either the frontend setup
>>> so it broadcasts at 60Hz rather than Auto or change it in
>>> nvidia-settings and that works ok, but would prefer an automatic
>>> resolution change to make things a little easier and to make it a bit
>>> more other half and kids friendly
>> 
>>> I've included my xorg.conf to see if anyone can think of any entries
>>> that need adding or amending.
>> 
>>> Cheers
>> 
>>> Jason
>> 
>>> Section "Monitor"
>>>      Identifier     "Monitor0"
>>>      VendorName     "Unknown"
>>>      ModelName      "ONK TX-SR876"
>>>      HorizSync       28.0 - 83.0
>>>      VertRefresh     56.0 - 62.0
>>>      ModeLine       "1920x1080 at 50" 148.500 1920 2448 2492 2640 1080 
>>> 1084
>>> 1089 1125 +hsync +vsync
>>>      ModeLine       "1920x1080 at 60" 148.500 1920 2008 2052 2200 1080 
>>> 1084
>>> 1089 1125 +hsync +vsync
>>>     ModeLine       "1920x1080 at 24" 74.250 1920 2558 2602 2750 1080 1084
>>> 1089 1125 +hsync +vsync
>>>     ModeLine       "1920x1080 at 23.976" 74.175 1920 2558 2602 2750 1080
>>> 1084 1089 1125 +hsync +vsync
>>>      ModeLine       "1920x1080 at 50i" 74.250 1920 2448 2492 2640 1080 
>>> 1085
>>> 1095 1125 +hsync +vsync interlace
>>>      ModeLine       "1920x1080 at 60i" 74.250 1920 2008 2052 2200 1080 
>>> 1085
>>> 1095 1125 +hsync +vsync interlace
>>>      ModeLine       "1920x1080 at 59.94" 148.350 1920 2008 2052 2200 1080
>>> 1084 1089 1125 +hsync +vsync
>>>      ModeLine       "1920x1080 at 59.94i" 74.175 1920 2008 2052 2200 1080
>>> 1085 1095 1125 +hsync +vsync interlace
>>>      Option         "DPMS"
>>> EndSection
>> 
>>> Section "Device"
>>>      Identifier     "Device0"
>>>      Driver         "nvidia"
>>>      VendorName     "NVIDIA Corporation"
>>>      BoardName      "GeForce GT 430"
>>>      Option       "FlatPanelProperties" "Scaling = Native"
>>>      Option       "RegistryDwords" "PerfectLevelSrc=0x3322;
>>> PowerMixerDefaultAC=0x1"
>>> EndSection
>> 
>>> Section "Screen"
>>>      Identifier     "Screen0"
>>>      Device         "Device0"
>>>      Monitor        "Monitor0"
>>>      DefaultDepth    24
>>>      Option         "TwinView" "0"
>>>      Option         "TwinViewXineramaInfoOrder" "DFP-1"
>>>      Option         "metamodes" "1920x1080_50 +0+0"
>>>      Option         "NoLogo" "False"
>>>      SubSection     "Display"
>>>          Depth       24
>>>      EndSubSection
>>> EndSection
>>> _______________________________________________
>> 
>> Does your screen handle 48fps? then set it at that refreshrate, that
>> also should not judder. or triple 24 = 73.
>> 
>> 
>> Tot mails,
>>   Hika                            mailto:hikavdh at gmail.com
>> 
>> "Zonder hoop kun je niet leven
>> Zonder leven is er geen hoop
>> Het eeuwige dilemma
>> Zeker als je hoop moet vernietigen om te kunnen overleven!"
>> 
>> De lerende Mens
>> 
>> 
>> 
> It's not that it judders on 24fps, far from it, very smooth, the panel
> performs better at 60fps when showing 24fps content (known issue on the
> panasonic plasma forums).

> I can manually make the switch to run on 60fps, but my query is whether
> I can get the xorg to automatically send 24fps out as 60fps, to save me
> having to manually update everytime I swtich from 24fps to 50fps.


> Cheers.

> Jason
> _______________________________________________

That would mean transcoding and I very much think you will loose a lot
in quality, maybe no judder but similar. But I'm no expert in this.
I was just thinking that possibly your panel performs better at 48 or
72 fps.


Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

De lerende Mens