I already use openshot to time my runs to the 30th of a second but i have always wanted to time them to the exact frame.

If you’re talking about frame counting using the number of frames of the run and the FPS of the recording, then you just need any video editing software that can advance frame by frame and show the length of a run in frames. Something like Sony Vegas or some versions of Avidemux can do just that.

https://github.com/Slush0Puppy/retime

This is a good option for retiming. Also that you already have it to the frame if you’re playing a game that runs at 30fps