what does gbpvrflowstatus.ax do?

[zaprat]

Anyone help me with this.

What does the filter gbpvrflowstatus.ax actually do. I have seen it some graphs and wondered what is was for. I like to know what is under the hood?

Is there any documentation what this filter and others are for?

[sub]

It checks data is flowing, the rate at which its flowing, and monitors for dynamic resolution or aspect ratio changes.