How to create shipment in Magento

Create Shipment

$order = Mage::getModel('sales/order')->loadByIncrementId('100000001');

try {

    if($order->canShip()) {

        //Create shipment

        $shipmentid = Mage::getModel('sales/order_shipment_api')

                        ->create($order->getIncrementId(), array());

        //Add tracking information

        $ship = Mage::getModel('sales/order_shipment_api')

                        ->addTrack($order->getIncrementId(), array());        

    }

}catch (Mage_Core_Exception $e) {

 print_r($e);

}