[Buildroot] [PATCH 0/7] add Phonon support to qtopia4

Hans-Christian Egtvedt hans-christian.egtvedt at atmel.com
Tue Dec 9 10:45:01 UTC 2008

On Tue, 9 Dec 2008 11:34:59 +0100
Markus Heidelberg <markus.heidelberg at web.de> wrote:

> Hans-Christian Egtvedt, 09.12.2008:
> > On Mon, 8 Dec 2008 23:00:09 +0100
> > Markus Heidelberg <markus.heidelberg at web.de> wrote:


> > The reason playback is so slow is that you are probably not using
> > the pixel coprocessor (PICO) to do the work. That was why getting
> > gst-ffmpeg (libavcodec) with the AVR32 patches to work would be very
> > nice.
> This optimization with using the PICO should also be possible for Qt
> output, independent of video playback, shouldn't it?

No, you will have to write optimized assembly to take advantage of the
PICO. Qt does not use the PICO by default, not even DSP or SIMD

> > > So currently I'm using mplayer -geometry
> > > 
> > 
> > And with the AVR32 patch, this is quite optimized and uses the PICO.
> Sounds comprehensible, I had not really thought about it.
> Are there plans or have there already been efforts to get the AVR32
> patch into mainline ffmpeg? The mplayer version rc1 in buildroot is
> quite old, OK rc2 is not very new, too. But it seems as if the big
> atmel patch is preventing from updating.

I am looking into porting the PICO stuff for ffmpeg to upstream ffmpeg,
and instead use that for mplayer. Then it should be easy to bump the
version to rc2 as well.

Best regards,
Hans-Christian Egtvedt

More information about the buildroot mailing list