[mythtv-users] Judder free playback with mythtv

[Brian J. Murrell]

On Mon, 2010-06-07 at 17:24 +1000, Jean-Yves Avenard wrote: 
> Since the capability of having mythtv automatically adjust the refresh
> rate of the TV to match the video being played was added ;

When/what version was this added in?  I'm running 0.23-fixes-r24879
here.

> So I've added an entry to the Mythtv manual..
> 
> http://www.mythtv.org/wiki/User_Manual:JudderFree

I followed the instructions there and while I can use xrandr -r to
change the frequency and can observe it changing with nvidia-settings
(my TV seems to call both actual 60Hz and 59.94Hz 60Hz on it's info
dialog), I don't seem to see it changing when myth starts playing a file
(recorded from NTSC SD cable, or) even when I play a DVDrip of a film,
which mplayer reports as being:

VIDEO:  [DIVX]  640x272  24bpp  23.976 fps  1252.0 kbps (152.8 kbyte/s)
Auto-selected AVI audio ID = 1
[V] filefmt:3  fourcc:0x58564944  size:640x272  fps:23.976  ftime:=0.0417

And, indeed, if I use xrandr -r to switch to 24Hz and then play that
video, myth switches the frequency back to 60Hz (real 60Hz, not 59.94).

Using Xorg's ModeDebug option, I can see that my supports the following
1920x1080 modes:

# grep 1920 /etc/X11/edid-modes.txt 
 "nvidia-auto-select" : 1920 x 1080 @  60.0 Hz  (from: EDID)
 "1920x1080"          : 1920 x 1080 @  60.0 Hz  (from: EDID)
 "1920x1080_60"       : 1920 x 1080 @  60.0 Hz  (from: EDID)
 "1920x1080_60_0"     : 1920 x 1080 @ 59.94/60 Hz (CEA-861B Format 16) (from: EDID)
 "1920x1080_60_1"     : 1920 x 1080 @  59.9 Hz  (from: X Server)
 "1920x1080_30"       : 1920 x 1080 @ 29.97/30 Hz (CEA-861B Format 34) (from: EDID)
 "1920x1080_24"       : 1920 x 1080 @ 23.97/24 Hz (CEA-861B Format 32) (from: EDID)
 "1920x1080_60i"      : 1920 x 1080 @ 59.94/60 Hz (CEA-861B Format 5) (from: EDID)

So while I don't seem to have any PAL (50Hz) modes, all of the desired
NTSC and "film" (24fps) modes seem to be there.

Any thots?

b.

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