55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
import cv2
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import time
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# 打开摄像头
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cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
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# 设置摄像头帧率为30
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cap.set(cv2.CAP_PROP_FPS, 35)
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# 设置摄像头图像大小为640x480
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cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
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cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
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cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'))
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# 检查摄像头是否成功打开
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if not cap.isOpened():
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print("Error: Could not open camera.")
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exit()
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# 定义一个计时器
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start_time = time.time()
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frame_counter = 0
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fps = 0
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while True:
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# 读取一帧图像
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ret, frame = cap.read()
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if not ret:
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print("Error: Could not read frame.")
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break
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# 计算帧率
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frame_counter += 1
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elapsed_time = time.time() - start_time
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if elapsed_time > 1:
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fps = frame_counter / elapsed_time
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start_time = time.time()
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frame_counter = 0
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# 在图像上显示帧率
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fps_text = f"FPS: {round(fps, 2)}"
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print(fps_text)
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cv2.putText(frame, fps_text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 2)
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# 显示图像
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cv2.imshow("Frame", frame)
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# 检查是否按下了q键，如果是则退出循环
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if cv2.waitKey(1) & 0xFF == ord('q'):
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break
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# 释放摄像头并关闭所有窗口
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cap.release()
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cv2.destroyAllWindows()
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