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demo1
import cv2
# 打开笔记本内置摄像头
capture cv2.VideoCapture(0)
# 笔记本内置摄像头被打开
while capture.isOpened():# 从摄像头中实时读取视频retval, image capture.read()# 在窗口中实时显示读取到的视频cv2.imshow(Video, image)# 等到用…视频处理
demo1
import cv2
# 打开笔记本内置摄像头
capture cv2.VideoCapture(0)
# 笔记本内置摄像头被打开
while capture.isOpened():# 从摄像头中实时读取视频retval, image capture.read()# 在窗口中实时显示读取到的视频cv2.imshow(Video, image)# 等到用户按下键盘的时间为1mskey cv2.waitKey(1)# 如果用户按下空格键if key 32:breakcapture.release()
cv2.destroyAllWindows()demo2
import cv2
# 打开笔记本内置摄像头
capture cv2.VideoCapture(0, cv2.CAP_DSHOW)
# 笔记本内置摄像头被打开
while capture.isOpened():# 从摄像头中实时读取视频retval, image capture.read()image_gray cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)# 在窗口中实时显示读取到的视频cv2.imshow(Video, image_gray)# 等到用户按下键盘的时间为1mskey cv2.waitKey(1)# 如果用户按下空格键if key 32:breakcapture.release()
cv2.destroyAllWindows()demo3
import cv2
# 打开笔记本内置摄像头
capture cv2.VideoCapture(0, cv2.CAP_DSHOW)
# 笔记本内置摄像头被打开
while capture.isOpened():# 从摄像头中实时读取视频retval, frame capture.read()# 在窗口中实时显示读取到的视频cv2.imshow(Video, frame)# 等到用户按下键盘的时间为1mskey cv2.waitKey(1)# 如果用户按下空格键if key 32:capture.release()cv2.destroyWindow(Video)cv2.imwrite(./copy.png, frame)cv2.imshow(img, frame)break
cv2.destroyAllWindows()demo4
import cv2
# 打开视频文件
video cv2.VideoCapture(公司宣传.avi)while video.isOpened():# 读取视频retval, image video.read()# 设置窗口cv2.namedWindow(Video, 0)cv2.resizeWindow(Video, 432, 300)if retval True:cv2.imshow(Video, image)else:breakkey cv2.waitKey(1)if key 27:break
video.release()
cv2.destroyAllWindows()demo5
import cv2
# 打开视频文件
video cv2.VideoCapture(公司宣传.avi)while video.isOpened():# 读取视频retval, image video.read()# 设置窗口cv2.namedWindow(Gray, 0)cv2.resizeWindow(Gray, 432, 300)if retval True:img_Gray cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)cv2.imshow(Gray, img_Gray)else:breakkey cv2.waitKey(1)if key 27:break
video.release()
cv2.destroyAllWindows()demo6
import cv2
# 打开视频文件
video cv2.VideoCapture(公司宣传.avi)while video.isOpened():# 读取视频retval, image video.read()# 设置窗口cv2.namedWindow(Video, 0)cv2.resizeWindow(Video, 420, 300)if retval True:cv2.imshow(Video, image)else:breakkey cv2.waitKey(50)if key 32:cv2.waitKey(0)continueif key 27:breakvideo.release()
cv2.destroyAllWindows()demo7
import cv2
# 打开视频文件
video cv2.VideoCapture(公司宣传.avi)
fps video.get(cv2.CAP_PROP_FPS)
# 获取视频文件的帧数
frame_Count video.get(cv2.CAP_PROP_FRAME_COUNT)
# 获取视频文件的帧宽度
frame_Width int(video.get(cv2.CAP_PROP_FRAME_WIDTH))
# 获取视频文件的帧高度
frame_Height int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))
print(帧速率:, fps)
print(帧数:, frame_Count)
print(帧宽度:, frame_Width)
print(帧高度:, frame_Height)demo8
import cv2
# 打开视频文件
video cv2.VideoCapture(output.avi)
fps video.get(cv2.CAP_PROP_FPS)
frame_Num 1
while video.isOpened():# 读取视频retval, frame video.read()# 设置窗口cv2.namedWindow(Video, 0)cv2.resizeWindow(Video, 420, 300)if retval True:cv2.putText(frame, frame: str(frame_Num), (0, 100), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 255), 5)cv2.putText(frame, second: str(round(frame_Num/fps, 2)) s, (0, 200), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 255), 5)cv2.imshow(Video, frame)else:breakkey cv2.waitKey(50)frame_Num1if key 27:breakvideo.release()
cv2.destroyAllWindows()demo9
import cv2
# 打开笔记本内置摄像头
capture cv2.VideoCapture(0, cv2.CAP_DSHOW)
# 确定视频被保存的编码格式
fourcc cv2.VideoWriter_fourcc(X, V, I, D)# 创建VideoWriter类对象
output cv2.VideoWriter(output.avi, fourcc, 20, (640, 480))while capture.isOpened():retval, frame capture.read()if retval True:output.write(frame)cv2.imshow(frame, frame)key cv2.waitKey(1)if key 27:break
capture.release()
output.release()
cv2.destroyAllWindows()
