QuickTime Streaming Server (QTSS) was a server or service daemon that was built into Apple's Mac OS X Server until OS X Server 10.7. It delivers video and audio on request to users over a computer network, including the Internet. Its primary GUI configuration tool is QTSS Publisher and its web-based administration port is 1220. When used in conjunction with QuickTime Broadcaster, it is possible to deliver live real time video and audio to multiple users over networks.
The protocol used has since been superseded with HTTP Live Streaming used in iOS and Mac OS X Lion and OS X Mountain Lion.