Echo call to VLC bash using subprocess.Popen on Linux

[LuukS001]

I can confirm this opens a VLC instance from Python, which I can control with the echo calls from the Terminal. Note that I added a 'break' line to the python script.

import subprocess
import socket
import select
 
esock, echildsock = socket.socketpair()
osock, ochildsock = socket.socketpair()
p = subprocess.Popen('vlc -I oldrc --rc-unix=/home/user/Documents/Sockets/socket1.sock', shell = True, stderr = echildsock.fileno(),
    stdout = ochildsock.fileno())

while p.poll() is None:
    r, w, x = select.select([esock, osock],[],[], 1.0)
    if not r:
        continue # timed out
    for s in r:
        print('stdout first echo call ready' if s is osock else 'stderr ready')
        data = s.recv(1024)
        print('received', data.decode('utf8'))
    break

When I run exactly the same command from Python but with: echo enqueue /home/user/Documents/DualscreenVLC/videos/video01.mp4
Terminal returns this:
stdout first echo call ready
('received', u'trying to enqueue /home/user/Documents/DualscreenVLC/videos/video01.mp4 to playlist\r\nenqueue: returned 0 (no error)\r\n')
So it seems to work.

The echo play | nc -U /home/luukschroder/Documents/Sockets/socket1.sock command after this hangs both when executed from Python and from the terminal.

Also in the activity monitor I can see multiple nc and sh, one for each call I made (vlc, echo enqueue and echo play).

Hopefully this clarifies it a bit.