I\'m making a nice little Python GUI frontend for ffmpeg on Windows (one that is specifically designed to convert videos to an iPhone-friendly format and automatically impor
You can easily do this by using psutil ( https://github.com/giampaolo/psutil ):
import psutil
pid = 1034 # replace this with the pid of your process
p = psutil.Process(pid)
p.suspend()
...to resume it:
p.resume()
Internally this is implemented in C by using SuspendThread() and ResumeThread() Windows system calls.