drscotthawley · June 2, 2021 19:38
diff --git a/webcam_nerverot.py b/webcam_nerverot.py
 #!/usr/bin/env python3

 # Do violence to the Logitech C920s webcam settings in realtime
 # To annoy your Zoom-mates by constantly changing the image

 from pynput.keyboard import Listener
 import os, sys
 import random
 import time


 # Find out the name of the webcam device
 lines = os.popen('v4l2-ctl --list-devices').read().lower().split('\n')
 for i, line in enumerate(lines):
    if 'webcam' in line:
        device = lines[i+1].strip()
        break
 print(f"device = [{device}]")
 #device = '/dev/video3'  # on my system.


 # parse the set of available (integer) controls
 prefix_cmd = 'v4l2-ctl -d ' + device + ' '
 ctrls_str = os.popen(prefix_cmd + '--list-ctrls | grep -v inactive | grep  "\(int\)"').read()
 ctrls = []
 for line in ctrls_str.split('\n'):
    words = line.strip().split()
    if ([] == words): break
    name, minval, maxval, stepval, value = words[0], int(words[4][4:]), \
        int(words[5][4:]), int(words[6][5:]), (words[8][6:])
    ctrls.append([name, minval, maxval, stepval, value])

 print("ctrls = ",ctrls)

 # Now go nuts
 keep_running, reset = True, False



 def on_press(key):  # how to make it stop
    global keep_running, reset
    if key.char in ['q','r']:
        keep_running = False
        if 'r' == key.char: reset=True
        return False  # shutdown the listener


 listener =  Listener(on_press=on_press)
 listener.start()
 while keep_running==True:
    s = prefix_cmd
    for c in ctrls:
        val = random.randrange(c[1], c[2], c[3])
        s += '--set-ctrl='+c[0]+'='+str(val)+' '
    print(s)
    os.system(s)
    time.sleep(.5) # wait 500 ms, because driver can't keep up


 # graceful exit
 if reset:  # reset is because sometimes the program hangs and you get stuck with weird webcam settings
    print("\nOkay, stopping. Restoring factory webcam settings:")
    s = f'v4l2-ctl -d {device} --set-ctrl=brightness=128 --set-ctrl=contrast=128 --set-ctrl=saturation=128 --set-ctrl=gain=255 --set-ctrl=sharpness=128 --set-ctrl=backlight_compensation=0 --set-ctrl=pan_absolute=0 --set-ctrl=tilt_absolute=0  --set-ctrl=zoom_absolute=120'
 else:
    print("\nOkay, stopping. Restoring previous webcam settings:")
    s = prefix_cmd
    for c in ctrls:
        s += '--set-ctrl='+c[0]+'='+str(c[4])+' '

 print(s)
 os.system(s)
	#!/usr/bin/env python3

	# Do violence to the Logitech C920s webcam settings in realtime
	# To annoy your Zoom-mates by constantly changing the image

	from pynput.keyboard import Listener
	import os, sys
	import random
	import time


	# Find out the name of the webcam device
	lines = os.popen('v4l2-ctl --list-devices').read().lower().split('\n')
	for i, line in enumerate(lines):
	if 'webcam' in line:
	device = lines[i+1].strip()
	break
	print(f"device = [{device}]")
	#device = '/dev/video3' # on my system.


	# parse the set of available (integer) controls
	prefix_cmd = 'v4l2-ctl -d ' + device + ' '
	ctrls_str = os.popen(prefix_cmd + '--list-ctrls \| grep -v inactive \| grep "\(int\)"').read()
	ctrls = []
	for line in ctrls_str.split('\n'):
	words = line.strip().split()
	if ([] == words): break
	name, minval, maxval, stepval, value = words[0], int(words[4][4:]), \
	int(words[5][4:]), int(words[6][5:]), (words[8][6:])
	ctrls.append([name, minval, maxval, stepval, value])

	print("ctrls = ",ctrls)

	# Now go nuts
	keep_running, reset = True, False



	def on_press(key): # how to make it stop
	global keep_running, reset
	if key.char in ['q','r']:
	keep_running = False
	if 'r' == key.char: reset=True
	return False # shutdown the listener


	listener = Listener(on_press=on_press)
	listener.start()
	while keep_running==True:
	s = prefix_cmd
	for c in ctrls:
	val = random.randrange(c[1], c[2], c[3])
	s += '--set-ctrl='+c[0]+'='+str(val)+' '
	print(s)
	os.system(s)
	time.sleep(.5) # wait 500 ms, because driver can't keep up


	# graceful exit
	if reset: # reset is because sometimes the program hangs and you get stuck with weird webcam settings
	print("\nOkay, stopping. Restoring factory webcam settings:")
	s = f'v4l2-ctl -d {device} --set-ctrl=brightness=128 --set-ctrl=contrast=128 --set-ctrl=saturation=128 --set-ctrl=gain=255 --set-ctrl=sharpness=128 --set-ctrl=backlight_compensation=0 --set-ctrl=pan_absolute=0 --set-ctrl=tilt_absolute=0 --set-ctrl=zoom_absolute=120'
	else:
	print("\nOkay, stopping. Restoring previous webcam settings:")
	s = prefix_cmd
	for c in ctrls:
	s += '--set-ctrl='+c[0]+'='+str(c[4])+' '

	print(s)
	os.system(s)