demux/adaptive: changed default-values for adaptive-{width, height}
demux/adaptive: changed default-values for adaptive-{width, height}

Signed-off-by: Francois Cartegnie <310f1db38de807b64012eea4bc0bd91d9d7c874e@free.fr>

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc