I built an application to launch each of the TV capture filters in a machine and run them in a graph to check they are still functional. I built this application because on Windows 10, an application crash in the course of development leaves the tuner hardware unusable. It needs the machine to be shut down and re-started to get the tuners back online, a simple re-start is not enough (probably a driver issue but its the same for three different card manufacturers). I notice that on Windows 7 and 8.1, the application completes four tuners in less than a second. On Windows 10, it takes over 5 seconds. This is a relatively simple DirectShow application.

The same code built in Windows 7 and Windows 10 results in the same behaviour. It is simple code, creating a graph, adding filters tuning the capture filter and running the graph. Destroy that graph and move on to the next filter in the iteration.

I also have a multiple tuner capture application that runs perfectly on Windows 7 and 8.1 but takes forever to launch on windows 10 and fails to run the graphs successfully. The processing takes much longer and the tuner stops delivering samples despite receivng successful receive results. It almost feels like each call to DirectShow is taking much longer. I have not timed each call but have timed the whole process, which confirms the processing time difference.