> Auslands-KV <auslands...@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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