create a new camera source using opencv python (camera driver using python)

import virtualvideo
import cv2

class MyVideoSource(virtualvideo.VideoSource):
   def __init__(self):
   self.cam = cv2.VideoCapture(0)
_, img = self.cam.read()
size = img.shape
#opencv 's shape is y,x,channels
self._size = (size[1], size[0])

def img_size(self):
   return self._size

def fps(self):
   return 30

def generator(self):
   while True:
   _, img = self.cam.read()
yield img

vidsrc = MyVideoSource()
fvd = virtualvideo.FakeVideoDevice()
fvd.init_input(vidsrc)
fvd.init_output(2, 640, 480, pix_fmt = 'yuyv422')
fvd.run()

sudo modprobe v4l2loopback video_nr = 2 exclusive_caps = 1

$ sudo raspi - config

$ raspistill - o output.jpg

$ workon cv

#
import the necessary packages
from picamera.array
import PiRGBArray
from picamera
import PiCamera
import time
import cv2

# initialize the camera and grab a reference to the raw camera capture
camera = PiCamera()
rawCapture = PiRGBArray(camera)

# allow the camera to warmup
time.sleep(0.1)

# grab an image from the camera
camera.capture(rawCapture, format = "bgr")
image = rawCapture.array

# display the image on screen and wait
for a keypress
cv2.imshow("Image", image)
cv2.waitKey(0)

$ python test_image.py

File "test_image.py", line 18, in
cv2.imshow("Image", image)
NameError: name 'image'
is not defined

 $ source~/.profile
 $ workon cv

$ workon cv
$ pip install "picamera[array]"
$ python your_script.py

$ pip uninstall picamera
$ pip install 'picamera[array]' == 1.10

File "/home/pi/.virtualenvs/cv/local/lib/python3.4/site-packages/picamera/encoders.py", line 534, in __init__
if not resize and format != 'yuv'
and input_port.name.startswith('vc.ril.video_splitter'):
   TypeError: startswith first arg must be bytes or a tuple of bytes, not str

from pygrabber.dshow_graph
import FilterGraph

graph = FilterGraph()
print(graph.get_input_devices())

from pygrabber.dshow_graph
import FilterGraph
from tkinter
import Tk

graph = FilterGraph()
graph.add_input_device(0)
graph.add_default_render()
graph.prepare()
graph.run()
root = Tk()
root.withdraw() # hide Tkinter main window
root.mainloop()

from pygrabber.dshow_graph
import FilterGraph
import cv2

graph = FilterGraph()
cv2.namedWindow('Image', cv2.WINDOW_NORMAL)
graph.add_input_device(0)
graph.add_sample_grabber(lambda image: cv2.imshow("Image", image))
graph.add_null_render()
graph.prepare()
graph.run()
print("Press 'C' or 'c' to grab photo, another key to exit")
while cv2.waitKey(0) in [ord('c'), ord('C')]:
   graph.grab_frame()
graph.stop()
cv2.destroyAllWindows()
print("Done")

import threading
import matplotlib.pyplot as plt
import numpy as np
from pygrabber.dshow_graph
import FilterGraph

class Camera:
   def __init__(self, device_id):
   self.graph = FilterGraph()
self.graph.add_input_device(device_id)
self.graph.add_sample_grabber(self.img_cb)
self.graph.add_null_render()
self.graph.display_format_dialog()
self.graph.prepare()
self.graph.run()

self.image_grabbed = None
self.image_done = threading.Event()

def img_cb(self, image):
   self.image_grabbed = np.flip(image, 2)
self.image_done.set()

def capture(self):
   self.graph.grab_frame()

def wait_image(self):
   self.image_done.wait(1000)
return self.image_grabbed

print("Opening first camera")
camera1 = Camera(0)
print("Opening second camera")
camera2 = Camera(1)
input("Press ENTER to grab photos")
camera1.capture()
camera2.capture()
print("Waiting images")
image1 = camera1.wait_image()
image2 = camera2.wait_image()
print("Done")
ax1 = plt.subplot(2, 1, 1)
ax1.imshow(image1)
ax2 = plt.subplot(2, 1, 2)
ax2.imshow(image2)
plt.show()

Regsvr32 C: \Program Files(x86)\ Screen Capturer Recorder\ screen - capture - recorder.dll
Regsvr32 C: \Program Files(x86)\ Screen Capturer Recorder\ screen - capture - recorder - x64.dll

C: \Users\ Leica\ Programs\ python_grabber - master\ venv\ Scripts\ python.exe C: /Users/Leica / Programs / python_grabber - master / main.py
Exception in Tkinter callback
Traceback(most recent call last):
   File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.752.0_x64__qbz5n2kfra8p0\lib\tkinter\__init__.py", line 1892, in __call__
return self.func( * args)
File "C:\Users\Leica\Programs\python_grabber-master\gui\MainWindow.py", line 166, in camera_properties
self.grabber.set_device_properties()
File "C:\Users\Leica\Programs\python_grabber-master\pygrabber\PyGrabber.py", line 94, in set_device_properties
self.graph.get_input_device().set_properties()
File "C:\Users\Leica\Programs\python_grabber-master\pygrabber\dshow_graph.py", line 99, in set_properties
show_properties(self.instance)
File "C:\Users\Leica\Programs\python_grabber-master\pygrabber\dshow_graph.py", line 592, in show_properties
OleCreatePropertyFrame(
      File "_ctypes/callproc.c", line 997, in GetResult OSError: [WinError - 2147467259] Unspecified error

Hi,

I am referring python_grabber module to access the cameras, I trying to get the camera properties using "set_device_properties()"
from pygrabber module but I am facing the following issue "
Hide Copy Code
File "_ctypes/callproc.c", line 920, in GetResult
OSError: [WinError - 2147467259] Unspecified error "
Please solve this issue.

Thanks in advance.
regards,
Thulasidass.V

What I have tried:

   from pygrabber.PyGrabber
import *
from tkinter
import Tk

from pygrabber.dshow_graph
import *

import cv2

dass = PyGrabber(0)

print(dass.get_video_devices())

print(dass.get_audio_devices())

print(dass.get_video_compressors())

print(dass.get_audio_compressors())

print(dass.get_asf_profiles())

print(dass.set_device(0))

print(dass.set_device_properties())

from gui.MainWindow
import *