Subprocess failed to kill child process when using with statement.

subprocess_reproduce.py

from urllib.request import urlopen
import subprocess
import time

url = 'https://iptv-org.github.io/iptv/index.m3u'

with urlopen(url) as response:
    for line in response.read().decode('utf-8').splitlines():
        if line.startswith('http'):
            start_time = time.time()

            # with statement, does not work
            with subprocess.Popen(f'ffprobe -v quiet {line}'.split(), stdout=subprocess.PIPE) as proc:
                try:
                    outs, errs = proc.communicate(timeout=.1)
                except subprocess.TimeoutExpired:
                    proc.kill()

            # # NO with statement, work
            # proc = subprocess.Popen(f'ffprobe -v quiet {line}'.split(), stdout=subprocess.PIPE)
            # try:
            #     outs, errs = proc.communicate(timeout=.1)
            # except subprocess.TimeoutExpired:
            #     proc.kill()

            print(f'{time.time() - start_time}')