Some users have problems with video decode filter either not being loaded (at TV start) or not being removed/changed/added back (on channel changes) to the filter graph. The result is a black screen...

These issues seem to be caused by TsReader.ax not parsing the TS stream correctly or for long enough to detect video-related changes - so the the graph rebuilding never gets triggered.

h4. Steps to Reproduce
It seems to be stream and timing dependant - I don't have the problem on my own system, but I've seen enough bug reports and logs to know the problem exists.....

e.g. see http://forum.team-mediaportal.com/television-mytv-frontend-tv-server-90/black-screen-livetv-switching-video-105241/ for a recent bug report

h4. Additional Information
I believe these issues have been fixed in the experimental 'noStopMod44' version here - http://forum.team-mediaportal.com/811296-post5.html - but these fixes need porting across to the 'standard' TsReader.ax code base.