notes.txt

list all mime types
cat /usr/share/applications/mimeinfo.cache

get user defaults
xdg-mime query default video/x-ms-asf
or 
cat ~/.config/xdg-mime.list

set mime type
xdg-mime default desktop-file.desktop video/x-ms/asf
or 
if video/x-ms-asf file ~/.config/xdg-mime.list
    sed "s/video\/x-ms-asf=.*/video\/x-ms-asf=new.desktop/g" -i xdg-mime.list
else
    echo "video/x-ms-asf=new.desktop" >> ~/.config/xdg-mime.list
    


