Empty PID's Check

Case description
We would like to have a feature that detects when an audio PID is empty. As it is right now if an audio PID is empty the video won't start. The solution we found is erasing those PID's in the content transmitted but we can't do this in every case because we don't have control over every video.

Proposed solution
Wait an audio PID for a certain amount of time and if it doesn't appears, ignore it and erase it or take it out.