libvlc_time_t private_mediacontrol_unit_convert( libvlc_media_player_t *p_media_player,
mediacontrol_PositionKey from,
mediacontrol_PositionKey to,
libvlc_time_t private_mediacontrol_unit_convert( libvlc_media_player_t *p_media_player,
mediacontrol_PositionKey from,
mediacontrol_PositionKey to,