opencv拍摄照片，录制保存视频

拍摄照片

import cv2
import numpy
import time

'''
实现了拍摄OK或者NG图片q
按O拍摄OK的照片
按N拍摄NG的照片
按q退出
'''

# 调整参数实现读取视频或者调用摄像头
cap = cv2.VideoCapture(0)                   # 调用摄像头
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)     # 分辨率
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)     # 分辨率
cap.set(cv2.CAP_PROP_FPS, 20)               # 帧数

index_ok = 0
index_ng = 0
# current_day = time.strftime('%Y-%m-%d')

current_day = "20190925"

print(current_day)
cv2.namedWindow('Frame',cv2.WINDOW_FULLSCREEN)
while(cap.isOpened()):
    # 从摄像头读取一帧，ret是表明成功与否
    ret, frame = cap.read()
    if ret:
        cv2.imshow('Frame', frame)
    else:
        break
    
    input = cv2.waitKey(1) & 0xFF

    # 按O保存OK图片
    if input == ord('o'):
        cv2.imwrite("./OK/ok-%s-%s.jpg" % (current_day, index_ok), frame)
        index_ok += 1
        print("已拍摄%s张OK图片，%s张OK图片" % (index_ok, index_ng))
    # 按N保存NG图片
    elif input == ord('n'):
        cv2.imwrite("./NG/ngq-%s-%s.jpg" % (current_day, index_ng), frame)
        index_ng += 1
        print("已拍摄%s张OK图片，%s张NG图片" % (index_ok, index_ng))

    # 监听键盘，按下q键退出
    if input == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

拍摄并保存视频

import cv2

'''
实现了拍摄视频的功能
可以自定义分辨率、帧率

'''

# 调整参数实现读取视频或者调用摄像头
cap = cv2.VideoCapture(1)  # 调用摄像头
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)  # 分辨率
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)  # 分辨率
cap.set(cv2.CAP_PROP_FPS, 20)  # 帧数
fourcc = cv2.VideoWriter_fourcc("I", "4", "2", "0")
out = cv2.VideoWriter("./video/test.mp4", fourcc, 20, (1920, 1080))
cv2.namedWindow('Frame', cv2.WINDOW_FULLSCREEN)

while (cap.isOpened()):
    # 从摄像头读取一帧，ret是表明成功与否
    ret, frame = cap.read()
    if ret:
        out.write(frame)
        cv2.imshow('Frame', frame)
    else:
        break

    input = cv2.waitKey(1) & 0xFF

    # 监听键盘，按下q键退出
    if input == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()