Bug with SubscribeToDataStreams

Jan 23, 2012 at 12:20 PM
Edited Jan 23, 2012 at 12:41 PM

There seems to be a bug in the SMFPlayer.SubscribeToDataStreams(params string[] streamNames) method that causes it to always throw an exception for the following reasons:

This method calls

ActiveAdaptiveMediaPlugin.ModifySegmentSelectedStreams(ActiveAdaptiveMediaPlugin.CurrentSegment, streamsToSelect, null)

But that method calls


where the streamsToRemove is the last parameter in this function. Because this function was called with that parameter as null, it causes an exception (you cannot call Cast<T> on a null reference) and the method aborts.

To fix this, one could ensure that SMFPlayer.SubscribeToDataStreams(params string[] streamNames) actually sends in an empty List<IMediaStream> as the last parameter of ActiveAdaptiveMediaPlugin.ModifySegmentSelectedStreams. And it will also be necessary to the same in SMFPlayer.UnsubscribeToDataStreams(params string[] streamNames), just with with the second parameter in this case.

Mar 30, 2012 at 1:04 PM


   Any suggestion to let this method works ? or any alternative approach ?


Apr 29, 2012 at 1:00 PM

I was experiencing the same problem. Had to add a null check for streamsToAdd and streamsToRemove on method ModifySegmentSelectedStreams in SmoothStreamingMediaPlugin.cs as either one is null for SubscribeToDataStreams or UnsubscribeToDataStreams.

Jun 2, 2012 at 1:58 AM

Thanks all for reporting this. We're working on a new update and will make sure this is fixed in the new version.

Sorry for the inconvenience,