[mythtv-users] Judder free playback with mythtv

[Jean-Yves Avenard]

Hi

On 8 June 2010 21:32, Brian J. Murrell <brian at interlinx.bc.ca> wrote:
> When/what version was this added in?  I'm running 0.23-fixes-r24879
> here.

0.22

> 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

yes, they all do that I believe

> 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).

then you haven't selected "Any" ; look at the screen capture

>
> 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)

if you see all of this, that I can guarantee you that you haven't
followed the instructions...

>
> 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?

yes, follow the instructions :)