Thanks for the answer, that is a clear one.
It's a pitty but I was already a bit prepared for that answer when I was looking into streaming as well. I will rephrase my question......
I want to use the GUI of the VLC in a situation where data is piped into VLC using the - (stdin) flag from the command line. VLC starts, shows its GUI and start playing fine. However the slider is not moving during playback. Using the slider to position the playback at specific time does not work ei...