Hello pprzemek,
2 things:
1) Older versions had trouble with the x or y coordinate being 0 (zero). I've verified that 2.2 also has this issue. Try 1,1 instead of 0,0.
2) The windows will be placed in the right place (using 1 instead of 0) if using the --no-autoscale command line option (in Windows) BUT the video is zoomed and cropped to the center of the video. See example image:
https://www.dropbox.com/s/jdixj528w3qs5 ... .jpg?raw=1
These are my command lines to produce the picture:
vlc.exe udp://@233.3.3.1:3333 --no-embedded-video --qt-start-minimized --no-video-deco --width="640" --height="360" --video-x="1" --video-y="1"
vlc.exe udp://@233.3.3.1:3333 --no-autoscale --video-on-top --no-embedded-video --qt-start-minimized --no-video-deco --width="640" --height="360" --video-x="1" --video-y="1"
Jean-Baptiste - Will the DEVs see this? It may be helpful...or it may not.
Kind Regards