[Interest] Chances of usable qtmultimedia on imx6?

[Christoph Kurz]

> Auslands-KV <auslands-kv at gmx.de> hat am 16. April 2014 um 10:38 geschrieben:
> 
>  Hi Christoph
> 
>  That looks GREAT!!! Need to test that immediately. :-)
> 
>  You know by chance, if 5.3 is available on Yocto?
> 
>  Regards
> 
>  Michael
> 
> 
>  Am 16.04.2014 09:39, schrieb Christoph Kurz:
> 
>      > >      > Hi
> >      >
> >      >I am looking for a nice small device used mainly for a specialized
> >      >digital signage solution. As software framework I would like to use
> >      >Qt5,
> >      >as I really love Qt5 :-)
> >      >
> >      >I had a recent look at the imx6 solutions available, and there are
> >      >many
> >      >devices out on the market at attractive price points. The power of the
> >      >CPU and the GPU should be totally sufficient for the use case. So I
> >      >tested Qt5 on it. The results are, however, pretty bad.
> >      >
> >      >While GL effects and shaders work nicely in Qt5.2.1, qtmultimedia is
> >      >extremely inefficient. Here are some examples comparing gstreamer and
> >      >Qt5:
> >      >
> >      >1. Playback of HD video (mpeg4):
> >      >Gstreamer: < 10% CPU usage, perfect picture
> >      >Qt5: 100% CPU usage, some frames are dropped, somewhat usable
> >      >
> >      >2. Playback of full HD (FHD) video (h264):
> >      >Gstreamer: < 20% CPU usage, perfect picture
> >      >Qt5: 100% CPU usage, 90% of frames are dropped, unusable
> >      >
> >      >3. Playback of rtsp webcam stream (640x480, h264):
> >      >Gstreamer: < 5% CPU usage, nearly perfect pictures
> >      >Qt5: 5-10% CPU usage (!), but >90% of frames are dropped, unusable
> >      >
> >      >Gstreamer shows that the imx6 is perfectly capable of playing these
> >      >streams. Also, XBMC runs perfectly on it. So. it definitely seems to
> >      >be
> >      >a matter of Qt integration with the imx6 platform that is severely
> >      >lacking.
> >      >
> >      >I am just wondering if there is a chance that Qtmultimedia will be
> >      >better integrated into the imx6 platform in the (near) future, or if I
> >      >should better look for a different platform (e.g. bay trail?) ?
> >      >
> >      >Thanks for any comments
> >      >
> >      >Michael
> > 
> >      Have you tried Qt5.3? It should work there:
> > https://codereview.qt-project.org/#change,76764
> > 
> >  > 
Sorry, I don't use Yocto, so I don't know...
But if I had to guess, then I would say the setup should be quite similar to
5.2.

Regards,
Christoph
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