[mythtv] h.264 multithreading

[Riz]

Using the same binaries, and no other change, next day it is using
both cores and working perfectly. Maybe something wrong with my setup?

On a side note, the on-demand cpu-frequency scaler had to be modified
to allow smooth playback for some reason. Had to change the value of
"/sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold" from 80
to 60.

Anyway, John, you may wish to use the attached patch to watch BBC-HD
smoothly. I had to modify Jannes patch to allow C4 (SD) to work
without skipping.

Riz

On Nov 21, 2007 8:30 PM, John <reidjr at btconnect.com> wrote:
>
> Riz wrote:
> > I'm using jannes patch[1] to enable multithreading for h.264 on the
> > latest svn trunk, but myth is still only using one core, which is
> > causing frame drops.
> >
> > Playing the same stream in mplayer with 2 threads plays perfectly,
> > using both cores.
> >
> > Is there something I am missing?
> >
> > [1] http://www.grunau.be/multithreaded-decoding_2.patch
> > _______________________________________________
> > mythtv-dev mailing list
> > mythtv-dev at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
> >
> >
> Did you remember to compile with --enable-ffmpeg-pthreads ??
>
> I have just recompiled r14931, and the same patch. I see both cores
> being used while watching BBC-HD. It is unfortunately still unwatchable,
> because of the problem Janne is working on (?). BBC-HD continually drops
> frames with the current SVN. This was fixed for BBC-HD with the earlier
> "eit patch", but that broke other channels.
>
> I also notice that BBC-HD used to be autodetected as Progressive, but is
> now detected as Interlaced. To play it back smoothly you need to
> manually select Interlaced (reversed).
>
> regards,
>
> John
>
> _______________________________________________
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> mythtv-dev at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
>
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