- Knowledge Commons
Live Broadcast Help
The live broadcast site uses Flash Player (recommended) or QuickTime Player to play content, but you can use an alternative player if your platform doesn't support these players. Flash and QuickTime are free of charge and support OS X and Windows. We recommend that you use the latest version of Flash or QuickTime for your operating system. You will also need a high-speed internet connection.
You can view our live broadcasts with a media player other than Flash or QuickTime if it supports the Real Time Streaming Protocol (RTSP) and H.264 video (MPEG-4 AVC/MPEG-4 Part 10). Examples include VLC (recommended), Totem, MPlayer, and xine. Tested configurations:
- VLC on Mac OS X and Windows XP (other operating systems also supported)
- Totem using GStreamer on Gentoo Linux
You can typically open our stream in your media player by going to File > Open > Location (or Network) and typing or pasting the broadcast's address, which is given on the event page. Unfortunately, we cannot offer advanced support for alternative players.
Connection error (QuickTime or alternative players)
RTSP/RTP streaming may require you to configure your Firewall or Network Address Translation (NAT) servers. If your access device performs network address translation, allowing multiple computers at your site to share a single IP address, then you will either need that router to understand RTSP, or you will need to use Flash playback. To enable RTSP to work properly inside your firewall, please follow the following IETF recommendation:
- Open port 554 for RTSP/TCP data.
- Open ports 6970 through 6999 (inclusive) for RTP/UDP data.
Video stutters or appears blurry (QuickTime)
Please ensure that you have the most recent version of QuickTime Player installed. If you are playing the embedded QuickTime video, try launching the video in QuickTime Player using the button below the video:
For additional help troubleshooting QuickTime, check the QuickTime Support on Apple's website.
If you still have problems, please use our contact form and submit the details of the media file you were trying to access and the error you received. We will respond as soon as possible with more troubleshooting suggestions and resources.