When calling the gui from command line, several arguments doesn't behave as expected.
mediainfo. This is on Archlinux 64, the GUI has been compiled from source.
mediainfo-gui -h lists the different options with the first letter as uppercase for exemple --Full or --Output=HTML while in CommandLine_parser.cpp function Parse, it seems like they are in lowercase like every other unix applications.
mediainfo-gui -h and mediainfo-gui --version should just display the help and the version, but for the moment it also opens the GUI (with no files loaded)
mediainfo-gui --output=html or --output=xml doesn't work, it still loads the default easy information panel.
Actually, I never focused on command line options for the GUI, so this is a bit a disorder. With the upcoming new GUI (in Qt), I should be better.