OpenCV从捕获卡或OBS Studio FaceRecogition加载视频

Question

我正在创建一个概念证明，我拥有一个CCTV设置，我可以访问的唯一输出是HDMI端口，我可以说捕获卡或OBS，作为我输入的所有代码的openCV输入看了看用树莓派和PiCam。因此即时通讯在功能限制方面有些失落

Answer 1

这适用于使用USB HDMI捕获卡的我：

#!/usr/bin/env python

import numpy as np
import cv2

import datetime, time

import os, sys

cap = cv2.VideoCapture(0)

cv2_version_major = int(cv2.__version__.split('.')[0])

if cv2_version_major > 3 :
    cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)
    cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1280)
else :  # before 3.0
    cap.set( cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 1920)
    cap.set( cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 1280)

start_time = time.time()
total_frames = 0

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

    # Display the resulting frame
    cv2.imshow('frame', cv2.pyrDown(frame))

    # add some processing here if you like

    total_frames += 1
    fps = total_frames / (time.time() - start_time)
    print 'FPS %.02f   \r' % fps,

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