No video output on Pi Zero

[Dschadu]

Issue Report

Description

I got no video output on Pi Zero W. The video plays just fine with this command:
omxplayer /opt/vc/src/hello_pi/hello_video/test.h264
I've got a HDMI monitor connected to the Pi Zero. omxplayer works fine, but the wrapper does not produce any video output. I also tried with args=['--adev', 'hdmi'] without success. After I start the .py file, I can see that the CPU usages goes up for a few seconds and then back to idle.

Problem reproduction

I'm using the minimal example:

#!/usr/bin/env python3

from omxplayer.player import OMXPlayer
from pathlib import Path
from time import sleep

VIDEO_PATH = Path("/opt/vc/src/hello_pi/hello_video/test.h264")

player = OMXPlayer(VIDEO_PATH)

sleep(5)

player.quit()

Environment details

• OS (lsb_release -a):

No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 10 (buster)
Release:        10
Codename:       buster

Software	Version
python-omxplayer-wrapper	0.3.3
python-dbus (dpkg -s python-dbus)	1.2.16
python (python --version)	2.7.16
omxplayer (omxplayer --version)	f543a0d

[Dschadu]

A bit additional info from the logger:

DEBUG:omxplayer.player:Instantiating OMXPlayer
DEBUG:omxplayer.bus_finder:BusFinder initialised with path: None
DEBUG:omxplayer.player:Setting up OMXPlayer process
DEBUG:omxplayer.player:Opening omxplayer with the command: ['omxplayer', '/home/pi/webapp/testvid.mp4']
DEBUG:omxplayer.player:Process opened with PID 6593
DEBUG:omxplayer.player:Trying to connect to OMXPlayer via DBus
DEBUG:omxplayer.player:DBus connect attempt: 0
DEBUG:omxplayer.bus_finder:Opening file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Opened file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Address 'unix:abstract=/tmp/dbus-yhVm6SkPhZ,guid=226b96173b2e32a4bbcec32461162aea' parsed from file
DEBUG:omxplayer.player:Failed to connect to OMXPlayer DBus address
DEBUG:omxplayer.player:DBus connect attempt: 1
[...]
DEBUG:omxplayer.bus_finder:Opening file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Opened file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Address 'unix:abstract=/tmp/dbus-yhVm6SkPhZ,guid=226b96173b2e32a4bbcec32461162aea' parsed from file
DEBUG:omxplayer.player:Failed to connect to OMXPlayer DBus address
DEBUG:omxplayer.player:DBus connect attempt: 34
DEBUG:omxplayer.bus_finder:Opening file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Opened file at /tmp/omxplayerdbus.pi
DEBUG:omxplayer.bus_finder:Address 'unix:abstract=/tmp/dbus-yhVm6SkPhZ,guid=226b96173b2e32a4bbcec32461162aea' parsed from file
DEBUG:omxplayer.player:Connected to OMXPlayer at DBus address: <omxplayer.dbus_connection.DBusConnection object at 0xb61f8ed0>
INFO:omxplayer.player:OMXPlayer process is dead, all DBus calls from here will fail
DEBUG:omxplayer.player:Quitting OMXPlayer
ERROR:omxplayer.player:Could not find the process to kill
DEBUG:omxplayer.player:Quit was called after self._process had already been released