GitLab

Solved remaining sout instance, that was preventing two video to be used successively.
Solved crash (stack overflow) when changing position after the workflow reached its end once.
Solved incoherent use of a media player after it has been released
Removed useless code.

Slider can be used again,
Next frame is working again, without any tricks.
Previous frame isn't functionnal yet

This will have to go soon, and will require a few adjustments between Timeline and its backend

Cleaned code.

Removed debug

This doesn't fully work right now, but it does compile.

This is more CPU efficient than the processEvent inlined in a method :-)