ffmpeg_reader is creating zombie processes

Opening a video file and deleting the variable leaves a zombie ffmpeg process running in the background. Steps to reproduce:

from moviepy.editor import VideoFileClip
import subprocess, gc

clip = VideoFileClip(PATH_TO_SOME_VIDEO)

del clip
gc.collect()

print([proc.args for proc in subprocess._active])
subprocess.run('echo hi', shell=True)

Output:

[['C:\\Users\\Rawing\\AppData\\Local\\imageio\\ffmpeg\\ffmpeg-win32-v3.2.4.exe',
 '-i', 'D:\\users\\aran-fey\\desktop\\temp {e}\\SV card videos\\101221050 Navy L
ieutenant.mkv', '-loglevel', 'error', '-f', 'image2pipe', '-vf', 'scale=959:1484
', '-sws_flags', 'bicubic', '-pix_fmt', 'rgb24', '-vcodec', 'rawvideo', '-']]
Traceback (most recent call last):
  File "temp.py", line 14, in <module>
    subprocess.run('echo hi', shell=True)
  File "C:\Python37\lib\subprocess.py", line 453, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Python37\lib\subprocess.py", line 645, in __init__
    _cleanup()
  File "C:\Python37\lib\subprocess.py", line 215, in _cleanup
    res = inst._internal_poll(_deadstate=sys.maxsize)
  File "C:\Python37\lib\subprocess.py", line 1193, in _internal_poll
    if _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0:
OSError: [WinError 6] The handle is invalid

As you can see, a ffmpeg process is running. The subprocess module tries to clean it up, but fails. Evidently, this ffmpeg process is spawned by the FFMPEG_VideoReader class, as the arguments match perfectly.

Related issues: #677 #569

[arianaa30]

Thanks for the hint. I did, but still randomly get the same error.

[keikoro]

Closing this since suggestions for dealing with the issue were provided.

Feel free to open a new issue following the issue template and referencing this older issue if the problem reoccurs.