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29 lines
692 B
Python
29 lines
692 B
Python
# 模块导入
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import numpy as np
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import cv2 as cv
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# 相机捕获
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cap = cv.VideoCapture(0,cv.CAP_DSHOW)
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#更改默认参数
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cap.set(6,cv.VideoWriter.fourcc('M','J','P','G'))# 视频流格式
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cap.set(5, 30);# 帧率
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cap.set(3, 1280)# 帧宽
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cap.set(4, 720)# 帧高
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# 获取相机宽高以及帧率
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width = cap.get(3)
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height = cap.get(4)
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frame = cap.get(5) #帧率只对视频有效，因此返回值为0
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#打印信息
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print(width ,height)
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# 循环
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while(True):
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# 获取一帧图片
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ret, img = cap.read()
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# 显示图片
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cv.imshow('img', img)
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# 等待键盘事件
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k = cv.waitKey(1) & 0xFF
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if k == 27:
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break
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#资源释放
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cap.release()
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cv.destroyAllWindows() |