[Bug 730863] New: Very high CPU usage on imx6 -> patch is here https://codereview.qt-project.org/#change,76764

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=730863
  GStreamer | qt-gstreamer | 0.10.x

           Summary: Very high CPU usage on imx6 -> patch is here
                    https://codereview.qt-project.org/#change,76764
    Classification: Platform
           Product: GStreamer
           Version: 0.10.x
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: qt-gstreamer
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: auslands-kv at gmx.de
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


The CPU usage is very high when using qtgstreamer on an imx6 based platform. 
This is due to very time consuming memory copy operation.

There is a patch included in Qt5.3 that allows for zero copy memory mapping
(see here: https://codereview.qt-project.org/#change,76764).

On Qt5.3 the QtMultimedia only uses negligible amount of CPU time even for
1080p material. QtGstreamer, however, does not seem to make use of this new
mechanism and is thus not usable on imx6 platforms.

Please consider porting this patch to QtGstreamer. If possible, also to the
0.10 branch, as under imx6 not all HW codecs have been ported yet to 1.0.

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