How to end a process in python?

Question

Python

Good afternoon.
The bottom line is that I start ffmpeg using subprocess.Popen, and when I terminate the script with proc.kill() then proc.terminate() then sys.exit() , then ffmpeg continues to hang in the task manager, although it is not active (i.e. in the column where the CPU is written, it shows 0). How to remove it completely from the task manager?

Answer 1

Solved the problem using the psutil library

import psutil

parent_pid = 30437   # my example
parent = psutil.Process(parent_pid)
for child in parent.children(recursive=True):  # or parent.children() for recursive=False
    child.kill()
parent.kill()

Answer 2

Probably ffmpeg starts subprocesses. Kill the whole group:

pro = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setsid) 
os.killpg(os.getpgid(pro.pid), signal.SIGTERM)