[mythtv-users] 24fps Movies and new 120Hz LCD TV

[James Oltman]

On Wed, Jan 6, 2010 at 7:13 PM, James Oltman <cnlibmyth at gmail.com> wrote:

> On Sun, Nov 1, 2009 at 6:56 PM, James Oltman <cnlibmyth at gmail.com> wrote:
>
>> On Sat, Oct 31, 2009 at 11:39 PM, Jean-Yves Avenard <jyavenard at gmail.com>wrote:
>>
>>> 2009/10/31 James Oltman <cnlibmyth at gmail.com>:
>>>
>>> > and left Rate and Aspect alone.  I have not done any overrides for
>>> specific
>>> > video sizes.  However, I don't see the area where JYA says to input the
>>> > location of a text file w/ refresh rates in it.  Could this be because
>>> my
>>> > backend is not running JYA's repo?  Thanks for the assistance!
>>>
>>> I don't mention it because it's not necessary anymore.
>>> MythTV can decode the refresh rates offered by the nvidia card and
>>> will display them as their real value.
>>> You can force the refresh rate you want by selecting the one you want
>>> in the list available. Or leave to Any to let mythtv select the one
>>> you want.
>>> To check if mythtv will get it allright, go trhough the list of rates
>>> available in mythtv and see if they are all there
>>>
>>> BTW, a 120Hz LCD Tv isn't really 120Hz, you can't supply them a 120Hz
>>> signal... Just another dumb marketing term to state that the TV is
>>> doing video compensation to improve motion and smoothness...
>>>
>>>
>> JYA,
>>
>> Thanks for the update.  I have cycled through the ANY field and there are
>> other rates listed, so I guess that means it's working.
>>
>> I read a lot of posts on LCD TVs before I bought mine.  I know they don't
>> do 120Hz input (totally agree about the "Marketing Double Talk"), but I got
>> this one because it can take 24Hz (or 23.971Hz) input.  I was looking for
>> something that would work well with BluRay.  I'm pretty happy with the setup
>> too.  PS3 BluRay looks fantastic.  Can't wait to try some other video and
>> see what it looks like.  Thanks!
>>
>
> Before I ask my question, my setup is as follows.
>
> MythBuntu FE 9.10 w/ JYA's repo enabled
> nVidia 9500GT w/ 512MB RAM
> MythTV 0.22 with VDPAU successfully enabled (Advanced 2X with 1x Fallback)
> nVidia drivers 195.30
>
> MythBuntu BE 9.10 no JYA repo
> MythTV 0.22 no VDPAU
>
> I have a video file on my box that I know is 23.976 Hz rate.  mPlayer has
> confirmed this is a 1920x1080 VC-1 23.976 clip.  I played the clip using
> Internal and my TV is still showing 60Hz.  I know my TV does 24Hz because
> I've seen blurays on my PS3 and the TV shows 24Hz.  I've checked the VIDEO
> MODES screen under APPEARANCE.  My settings for "Separate Video Modes for
> GUI and TV Playback" are set like this:
>
> GUI:  1920x1080
> Video Output:  1920x1080
> Rate:  Any
> Aspect:  Any
>
> All the overides for specific video sizes are 0, 0 320x200 Any Default  (I
> haven't changed them from their defaults).  What am I doing wrong?  I have
> nothing special setup in my xorg.conf.  It's just a plain vanilla install of
> MythBuntu except for the JYA repo.
>
> Also, when playing through INTERNAL mythtv player, I would get what looks
> like bits of video that weren't decoded right.  They are small miscolored
> blocks that appear and disappear.  They aren't there all the time and they
> aren't there in the mplayer playback of the clip.
>
> Thanks for the help!!
>

Interestingly enough, when I run a xrandr --current, it lists out 53 (23.976
Hz) as an option.  When I run xrandr -r 53 my TV re-syncs but never says
24Hz.  That's very strange.  That makes me think that xrandr is the one with
issues, but I'm not sure.  My TV is a Samsung LN52A650.

Jim
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