Python OpenCV避免视频源->；捕获源对话框

因此，我试图在Python2.7.5上创建一个简单的程序，其中一个窗口 为用户选择的时间显示实时视频源

import numpy as np
import cv2
import time


def Func_VideoCapture(Float_Time = 10):
    Float_WantedTime = time.time() + Float_Time
    Float_CurentTime = time.time()

    cap = cv2.VideoCapture(0)

    while Float_CurentTime <= Float_WantedTime:
        #get current time
        Float_CurentTime = time.time()

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

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

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

if __name__ == "__main__":
    Float_Time = float(raw_input(">>> "))
    Func_VideoCapture(Float_Time)

…在主功能中，但结果相同：

import numpy as np
import cv2
import time

def Func_VideoCapture(cap, Float_Time = 10):
    Float_WantedTime = time.time() + Float_Time
    Float_CurentTime = time.time()

while Float_CurentTime <= Float_WantedTime:
    Float_CurentTime = time.time()

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

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

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

def main():
    cap = cv2.VideoCapture(0)
    Float_Time = float(raw_input(">>> "))
    Func_VideoCapture(cap, Float_Time)

if __name__ == "__main__":
    main()

将numpy导入为np
进口cv2
导入时间
def Func视频捕获（上限、浮动时间=10）：
Float\u WantedTime=time.time（）+Float\u time
Float\u CurentTime=time.time（）
当Float\u CurentTime时，尝试以下方法：

import numpy as np
import cv2
import time


def Func_VideoCapture(Float_Time = 10):
    Float_WantedTime = time.time() + Float_Time
    Float_CurentTime = time.time()

    cap = cv2.VideoCapture(0)



    while Float_CurentTime<=Float_WantedTime:
        #get current time
        Float_CurentTime = time.time()

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

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

        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

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

if __name__ == "__main__":
    Float_Time = float(raw_input(">>> "))
    Func_VideoCapture(Float_Time)

将numpy导入为np
进口cv2
导入时间
def Func_视频捕获（浮动时间=10）：
Float\u WantedTime=time.time（）+Float\u time
Float\u CurentTime=time.time（）
cap=cv2.视频捕获（0）
而现在
import numpy as np
import cv2
import time


def Func_VideoCapture(Float_Time = 10):
    Float_WantedTime = time.time() + Float_Time
    Float_CurentTime = time.time()

    cap = cv2.VideoCapture(0)



    while Float_CurentTime<=Float_WantedTime:
        #get current time
        Float_CurentTime = time.time()

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

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

        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

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

if __name__ == "__main__":
    Float_Time = float(raw_input(">>> "))
    Func_VideoCapture(Float_Time)