[mythtv-users] Problem Playing 720p 60fps recordings

Igor Cicimov icicimov at gmail.com
Sun Jan 27 00:32:45 UTC 2013


On 27/01/2013 8:20 AM, "Peter Bennett (cats22)" <cats22 at comcast.net> wrote:
>
> On 01/21/2013 09:43 AM, Peter Bennett (cats22) wrote:
> > I have one backend/frontend combo, another dedicated frontend, and my
> > general purpose desktop computer which also has the frontend installed.
> >
> > My problem is that on the desktop computer only, if I play a recording
> > that came from a channel that broadcasts at 720p 60fps, the video plays
> > in slow motion and the audio cuts in and out. The audio is probably just
> > trying to stay in sync with the slow motion video. I appears that it may
> > be playing the video at 30 fps instead of 60 fps.
> >
> > Programs recorded at 1080i 30fps play perfectly.
> >
> > The 720p 60fps recordings play perfectly on the other two frontends.
> >
> > This happens on mythtv 0.25 and 0.26.
> >
> > All the systems are running Ubuntu 12.04 and mythtv 0.26.
> >
> > The backend/frontend is the slowest CPU, 32bit pentium single core hyper
> > threading about 7 years old.
> > The dedicated frontend has a dual core pentium 64 bit cpu about 5 times
> > as fast as the backend/frontend.
> > The desktop has Intel i7 quad core with hyper threading, twice as fast
> > as the dedicated frontend.
> >
> > The desktop does not have an NVIDIA adapter and is not set to use VDPAU.
> > The other two have nvidia and VDPAU set. The desktop has ATI Radeon HD
> > 4350. I used to have an ATI display adapter on the combo
> > frontend/backend and I never noticed this issue there.
> >
> > The 720fps mpg files play perfectly on the desktop machine with VLC and
> > the Ubuntu movie player program, just not with Mythtv front end.
> >
> > I have tried all the playback profiles, with no different results. I
> > tried adjusting the time stretch in the playback but that was not the
> > cause and I could not get it working correctly by changing that.
> >
> > I suspect there may be some software I have installed on the desktop
> > that is affecting this playback, but I don't know what it could be.
> >
> > Any ideas?
> >
> > Peter
>
> I tried installing the AMD display drivers from the AMD site

Which one? The newest releases have dropped the support for 3xxx and 4xxxx
as far as i know. You need to go with older version read the release notes.

, following
> the instructions at
>
http://askubuntu.com/questions/124292/what-is-the-correct-way-to-install-ati-catalyst-video-drivers-fglrx
> This did not fix the slow-motion video, however they messed up the video
> aspect ratio, everything was stretched vertically, so I uninstalled
> those again.
>
> Anybody have any ideas?
>
> Peter
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20130127/7d507df5/attachment.html>


More information about the mythtv-users mailing list