[mythtv-users] Help in playing hdtv

[Juergen Sachs]

Am Montag 11 Februar 2008 22:19:11 schrieb Mark Hutchinson:
> Juergen Sachs wrote:
> > Am Montag 11 Februar 2008 21:27:28 schrieb Brad DerManouelian:
> >>> I am running mythtv trunk version an try to get hdtv running
> >>> smoothly. First
> >>> I have to say, that until running the trunk version (I had v0.20 fixes
> >>> before) hdtv livetv was impossible. Now it is playing, but with a
> >>> very "jittery" picture and skiped frames.
> >>>
> >>> I do not know if it is a problem of my hardware configuration:
> >>> Gfx: GeForce 7300 SE with native nvidia driver
> >>> CPU: Intel(R) Core(TM)2 CPU          6320  @ 1.86GHz
> >>> Ram: 2GB
> >>>
> >>> So I think it is not too bad. But when I run "top" while playing a
> >>> livetv I
> >>> see it is displaying about 100% till 140% for mythfrontend. So I
> >>> guess I
> >>> reached the limits :-(
> >>>
> >>> Mythfronend is running as a normal user.
> >>>
> >>> So the question is if my hardware is not powerfull enough to play
> >>> hdtv, or
> >>> if
> >>> I have to tweak my config.
> >>>
> >>> Looking in the documentation did not show me a special configuration
> >>> hint.
> >>>
> >>> So maybe someone here has a similar config and can give me some
> >>> advice ?
> >>
> >> I would start by looking at your xorg settings. Which nvidia driver
> >> are you using? Do you have:
> >> Option "Use Events" "True" in your device section? If not, give that a
> >> try.
> >
> > I did not have this option in my device section. So I added the option
> > and restart the x server (init 3 -> init 5) same problem.
> > Now it plays smothly for about half a second, the stops, then resumes,
> > then stops... But picture quality is brilliant :-)
> >
> > But still my cpu is nailed to 100%. Ok this is only 50% of the overall
> > cpu power but I think it is still to much.
> >
> > I am using the gfx driver from nvidia, but do not know the exact version
> > if this matters.
> >
> > Maybe my gfx card is to weak for the job ?
> > Any more tips ?
> >
> > Juergen
>
> I just saw this come through in mythtv-commits.  Could it be a solution?
>
> ----
>
>     Author: janne
>         Date: 2008-02-11 20:36:22 +0000 (Mon, 11 Feb 2008)
> New Revision: 15918
>    Changeset: http://cvs.mythtv.org/trac/changeset/15918
>
> Modified:
>
>    trunk/mythtv/configure
>
> Log:
>
> enable ffmpeg-pthreads as default
>
> The spread of dual core machines and MPEG4 AVC in HD resolution
> makes default user experience much better with multithreaded decoding
I am using Rev 16913 of the trunk, so it is already active I hope.

Thanks for the hint
Juergen



-- 
Jürgen Sachs
http://www.mobacomp.de/