[Interest] Bad playback of RTSP streams on imx6 platform [Qt5.3]

[Michael]

I have added a bug to the Qt bugtracker:

https://bugreports.qt-project.org/browse/QTBUG-38465

Am 19.04.2014 10:02, schrieb Michael:
> Hi
>
> I'm using QT5.3 from git on an imx6 board. Multimedia playback
> performance has greatly improved with this commit
> (https://codereview.qt-project.org/#change,76764). Performance of
> video playback is typically pretty much on par with a native gstreamer
> pipe.
>
> However, this does not apply to RTSP streams. While the following
> gstreamer pipe plays (nearly) perfectly on the commandline:
>
> gst-launch rtspsrc location=rtsp://axis-cam1/axis-media/media.amp !
> decodebin2 ! mfw_v4lsink sync=false
>
> Playing the same with Qt5 qml MediaPlayer drops lots of frames (about
> 90% or more), although CPU usage is very low < 10%.
>
> Warning: "A lot of buffers are being dropped."
> Warning: "A lot of buffers are being dropped."
> Warning: "A lot of buffers are being dropped."
>
> Also, playback takes up to 5 seconds to start, whereas the cmdline
> nearly start immediately.
>
> I can get a similar, although not as bad, experience when using
> sync=true on the mfw_v4lsink element. Not sure though, if this is
> relevant.
>
> Anybody knows how best to debug or even to solve this problem?
>
> Thanks
>
> Michael
>
>
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