GLMixer Code

Trying to improve libav code

Bug Fix: cleanup of fill_first_frame to avoid blocking call of
avcodec_decode_video2

Bug fix freeze on error; Cathing decoding failure in VideoFile thread,
connected to the direct removal of the failing video source.

Bug Fix : freeze in reading first frame of video file (infinite loop)

Fix bug session manager (reload list after creation of a new session)

Code cleanup (deprecated Q_SIGNALS and Q_SLOTS)

Simplified opening of session (no busy indication, all events processed
before, etc.)

Closing properly Video File, and adding mechanisms to force thread
termination.

Added the type of the source as first specific property.