http://forum.team-mediaportal.com/general-development-no-feature-request-here-48/unsupported-tryout-novideoaudio-scrambled-errors-46513/

This is possible when video and audio observer is not yet set when the first audio / video packet arrives.

h4. Additional Information
13-10-2008 13:41:55.335 Recorder: TIMESHIFT start of video detected
13-10-2008 13:41:55.350 Recorder: TIMESHIFT SetVideoAudioObserver observer ok
13-10-2008 13:41:55.397 Recorder: TIMESHIFT start of audio detected