[mythtv] Re: jumping picture

Sigurd Nes sigurdne at online.no
Tue May 31 18:03:56 UTC 2005

Peter Lee wrote:
> On 5/31/05, Sigurd Nes <sigurdne at online.no> wrote:
>>sigurdne wrote:
>>>>===== Original Message From Peter Lee <peteratcmu at gmail.com>, Development of
>>>mythtv <mythtv-dev at mythtv.org> =====
>>>>On 5/30/05, Jarod Wilson <jarod at wilsonet.com> wrote:
>>>>>On Monday 30 May 2005 15:46, David Engel wrote:
>>>>>>On Mon, May 30, 2005 at 04:19:33PM -0400, Peter Lee wrote:
>>>>>>>As another data point, I am seeing the same thing, with a fresh
>>>>>>>checkout from around midnight last night.  But the jumpiness is only
>>>>>>>with the bob deint turned on.  Reverting to the old version gives a
>>>>>>>perfectly stable and clear picture, with bob deint.
>>>>>>OpenGL video sync is now a run-time setting and defaults to off
>>>>>>because it can cause problems for some people.  Try turning is [back]
>>>>>And the toggle for it is on the same page as the xvmc one:
>>>>>Utilities/Setup -> Setup -> TV Settings -> Playback -> a few pages in...
>>>>David, Jarod:
>>>>Thanks for the tip.  I should have known better.  I noticed the
>>>>various posts about this earlier but somehow didn't connect it up with
>>>>this problem.  Turning on OpenGL video sync indeed eliminates the
>>>>jumpiness quite nicely...
>>>It did not do anything for me (enabled both OpenGL video sync and xvmc) -
>>>still jumping.
>>If I switch "Deinterlaced playback" from "Bob" to something else – the
>>jumping disappear. Is there a bug in the Bob algorithm?
> Hmm...No, I don't think so.  I am running with bob deinterlacing (and
> opengl vsync).  In fact, I really need to use bob if I want the best
> picture on my setup...
> Peter
Here is what I have done:
fresh checkout of mythtv (and mythplugins)

cd mythtv

./configure --prefix=/usr \
--disable-joystick-menu  \
--disable-firewire \
--enable-proc-opt \
--enable-opengl-vsync \
--enable-xvmc \

qmake PREFIX=/usr mythtv.pro
make install

enabled bob, opengl vsync and xvmc in Utilities/Setup -> Setup -> TV 
Settings -> Playback

Result : still jumping

AMD Sempron 2600
nvidia 5200
NVIDIA-driver: 1.0-7174
kernel: linux-
ivtv-driver: 0.3.5p

Any clue on where to look/ what to change?


More information about the mythtv-dev mailing list