When using an Aston Seca 1.05 CAM, switching the audio track on a PayTV channel may result in loosing the video (instead, “Encrypted” will be displayed on the screen).
This is a known limitation of using this CAM with EyeTV. The same problem may be experienced with some other Aston CAMs. The problem won’t appear if the CAM is used with a set top box.
Workaround 1: pause the live TV for at least 4 seconds and then press the “play” button, video should be back.
Workaround 2: quit and restart EyeTV.
As the problem is related to the CAM, replacing the CAM by another model from another manufacturer may solve the problem definitely.