Blackmagic超声波迷你录音机是否兼容OpenCV？

Question

有没有一种方法可以将黑魔法超声波迷你录音机（Thunderbolt连接）中的视频传输到OpenCV（Python）中？ Blackmagic桌面视频11.2和OpenCV 3.4

OpenCV似乎无法识别Blackmagic输入。我试图改变视频捕获索引，但似乎没有任何效果

import numpy as np
import cv2
from matplotlib import pyplot as plt
cap = cv2.VideoCapture(0)

while(True):
    # Capture frame-by-frame
    ret, frame = cap.read()

    # Our operations on the frame come here
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Display the resulting frame
    cv2.imshow('frame',gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()