I installed Qt creator(Qt5) and its examples on Raspberry pi 2 B Model. I'm running Raspbian Jessie on it. I tried to Run a Video player example but I end up with an error which was as follows:
Starting /usr/lib/arm-linux-gnueabihf/qt5/examples/multimediawidgets/build-player-Desktop-Debug/player... libEGL warning: GLX/DRI2 is not supported libEGL warning: DRI2: failed to authenticate
(player:841): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed GStreamer; Unable to play - "file:///home/pi/Desktop/test_video.mp4" GStreamer; Unable to play - "file:///home/pi/Desktop/test_video.mp4" Warning: "No decoder available for type 'video/quicktime, variant=(string)iso'."
Please let me know how to fix these "Gstreamer" and "No decoder" things.
After lot of googling I can able to fix it and here is my answer.
You must edit your /etc/apt/sources.list to add new repository "deb http://www.deb-multimedia.org jessie main non-free" Then install the following packages
sudo apt-get update
# To fix key error
sudo apt-get install deb-multimedia-keyring
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install gstreamer0.10-ffmpeg
sudo apt-get install gstreamer0.10-plugins-ugly
sudo apt-get install gstreamer0.10-plugins-bad
sudo apt-get install gstreamer0.10-plugins-good
Credits: http://www.deb-multimedia.org/ How to fix gstreamer error in Qt5?