When I first had the computer I had no trouble playing any video files. Now I get an error code C00D11BB (specified protocol is not supported ) message on some videos. I have not been able to find this specific code on any help site.
Error Code C00D11BB
I checked with Microsoft and found some information about the error code C00D11BB. It is related to Windows Media Player’s inability to play a particular file, but then you already knew that. The information that I found went on to explain that a specific protocol is either not supported by the Windows Media Player or server. This means that the problem could be on either your end or the server hosting the video. If the problem lies with the Windows Media Player, you can take some steps to try to resolve the problem but if the problem lies on the server’s end, you may not be able to do much about it. First, let’s look at how to enable protocols in Windows Media Player before examining potential solutions for accessing hosted videos.
Configuring Windows Media Player Protocols
Go ahead and launch Windows Media Player and then go to the Tools menu item. If you can’t see the menu list, right-click a blank area of the black bar (where you see the words “now playing,” “library,” and “rip”), and choose “Show classic menus.” After clicking Tools, click on Options and then click the Network tab. Make sure checkmarks are present in the Protocols for MMS URL as well as in Allow the Player to Receive Multicast Streams.
While you’re in this area, look at the HTTP and RTSP protocols and see if they are set to use a proxy. The HTTP protocol should be set to use the proxy settings of your Web browser. By default, the RTSP is set to none. Try changing it to “auto detect” if none of the other tips work.
Firewall Issues
Windows Firewall may be blocking UDP and multicast streams, so go into Windows Firewall, click the Exceptions tab, and add Windows Media Player to the list.
Accessing Videos through Open URL
If you are receiving the error code C00D11BB when using the Windows Media Player’s File > Open URL command, then it’s possible that the error lies on the server. Windows Media Player supports MMS, HTTP, and RTSP protocols with the syntaxes as follows:
- MMS://server/filename (with a multimedia file extension such as .mp3. or .wmv)
- MMS://server/sami.asf?SAMI=http://server/sami/sami_demo.smi (SAMI file)
- RTSP://server/filename
- HTTP://server/filename
When the error code is generated after using the Open URL, double check to see if you have entered the URL correctly. If so, try using a different protocol. For example, instead of RTSP, enter HTTP. If none of these tweaks work, then it’s likely a problem on the server’s end.
