pvys / CV-camera-finder

A simple function to find devices on windows using media foundation

CV-camera-finder

A simple function to find a connected camera list with media foundation. This is just a modified code of a sample found in https://github.com/Microsoft/Windows-classic-samples/tree/master/Samples/Win7Samples/multimedia/mediafoundation/MFCaptureToFile to use in python.

If you are looking for a function with Directshow, see https://www.codeproject.com/Articles/1274094/Capturing-Images-from-Camera-using-Python-and-Dire.

Download pymf.pyd(32-bit -> file in folder 32, 64-bit -> ...) to your PYTHONPATH to just use it. If you want to modify it, edit cpp files and rebuild it.

You can use it to match opencv index with camera name.

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Dependency: Visual C++ Redistributable 2019

You can download it here: https://support.microsoft.com/ko-kr/help/2977003/the-latest-supported-visual-c-downloads

Tested Env: windows10, python3.

simple example

from pymf import get_MF_devices
device_list = get_MF_devices()
for i, device_name in enumerate(device_list):
    print(f"opencv_index: {i}, device_name: {device_name}")

=> opencv_index: 0, device_name: Integrated Webcam

simple example with opencv

from pymf import get_MF_devices
import cv2

device_list = get_MF_devices()
cv_index = None
for i, device_name in enumerate(device_list):
    # find index of camera you want
    q = input(f"Wanna use {device_name}?\n")
    if q.strip() == "YES":
        cv_index = i
        break

if cv_index is None:
    print("Not found")
else:
    # make sure you use Media Foundation
    cap = cv2.VideoCapture(cv_index + cv2.CAP_MSMF)
    while (cap.isOpened):
        ret, frame = cap.read()
        if ret:
            cv2.imshow("frame", frame)
            k = cv2.waitKey(1)
            if k > 0:
                break
        else:
            break
    cap.release()
    cv2.destroyAllWindows()