Qt-Gstreamer on I.MX6 fails to start.

[Sebastian Dröge]

On So, 2013-12-08 at 09:23 -0800, Plox wrote:
> Good day,
> I am trying to display hw-accelerated video on an I.MX6 out of qt
> application.
> In order to do so I've created a custom Linux distribution using the Yocto
> project, compiled qt on the board and installed qt-Gstreamer.
> All processes finished without any errors.
> 
> However, once I launch the qmlplayer2 example I am receiving the following
> output:
> 
> root at nitrogen6x:/opt/qt-gstreamer/build/examples/qmlplayer2# ./qmlplayer2
> QEglFSImx6Hooks will set environment variable FB_MULTI_BUFFER=2 to enable
> double buffering and vsync.
>  If this is not desired, you can override this via: export
> QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1 
> EGLFS: Failed to open /dev/fb0
> EGLFS: Unable to query physical screen size, defaulting to 100 dpi.
> EGLFS: To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and
> QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).

This part looks like your environment is not properly setup and there
are permission problems, or no framebuffer driver loaded for your
device.

> (gst-plugin-scanner:3749): GStreamer-WARNING **: Failed to load plugin
> '/opt/qt-gstreamer/build/elements/gstqtvideosink/libgstqt5videosink.so':
> /opt/qt-gstreamer/build/elements/gstqtvideosink/libgstqt5videosink.so:
> undefined symbol: _Z33gst_qt_quick2_video_sink_get_typev
> 
> (gst-plugin-scanner:3749): GStreamer-WARNING **: Failed to load plugin
> '/usr/lib/gstreamer-0.10/libgstqt5videosink.so':
> /usr/lib/gstreamer-0.10/libgstqt5videosink.so: undefined symbol:
> _Z33gst_qt_quick2_video_sink_get_typev
> Failed to create qtquick2videosink. Make sure it is installed correctly

This sounds like a problem in the qt-gstreamer build system. It
registers this element if Qt 5 is found but it looks like it didn't
actually build the corresponding source file for that element.

Can you provide the build log of qt-gstreamer?

-- 
Sebastian Dröge, Centricular Ltd - http://www.centricular.com
Expertise, Straight from the Source
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