Python 使用过滤器在OpenCV中保存视频
我正在尝试使用open CV保存一个视频,其想法是将视频帧从彩色到灰度交替几秒钟。当我保存时,视频仅保存彩色帧Python 使用过滤器在OpenCV中保存视频,python,python-3.x,opencv,Python,Python 3.x,Opencv,我正在尝试使用open CV保存一个视频,其想法是将视频帧从彩色到灰度交替几秒钟。当我保存时,视频仅保存彩色帧 import cv2 def saving(cap): width=cap.get(cv2.CAP_PROP_FRAME_WIDTH) height=cap.get(cv2.CAP_PROP_FRAME_HEIGHT) fps= cap.get(cv2.CAP_PROP_FPS) fourcc=cv2.VideoWriter_fourcc(*'XVID
import cv2
def saving(cap):
width=cap.get(cv2.CAP_PROP_FRAME_WIDTH)
height=cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
fps= cap.get(cv2.CAP_PROP_FPS)
fourcc=cv2.VideoWriter_fourcc(*'XVID')
out=cv2.VideoWriter('Project11.mp4',fourcc,fps,(int(width),int(height)))
return (out)
def first4seconds(video):
c=saving(video)
while(video.isOpened()):
print(video.get(cv2.CAP_PROP_POS_MSEC))
ret, frame = video.read()
if ret==True:
if cv2.waitKey(25) & 0xFF == ord('q'):
break
else:
break
if(500<=int(video.get(cv2.CAP_PROP_POS_MSEC))<1000 or 2000<=int(video.get(cv2.CAP_PROP_POS_MSEC))<3000):
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
c.write(gray)
cv2.imshow('frame',gray)
else:
c.write(frame)
cv2.imshow('frame',frame)
video.release()
cv2.destroyAllWindows()
cap = cv2.VideoCapture('test.mp4')
first4seconds(cap)
导入cv2
def保存(上限):
宽度=cap.get(cv2.cap\U PROP\U FRAME\U WITH)
高度=cap.get(cv2.cap\u PROP\u FRAME\u height)
fps=cap.get(cv2.cap\u PROP\u fps)
fourcc=cv2.视频编写器_fourcc(*“XVID”)
out=cv2.VideoWriter('Project11.mp4',fourcc,fps,(int(宽度),int(高度)))
返回(输出)
def First4秒(视频):
c=保存(视频)
而(video.isopend()):
打印(video.get(cv2.CAP\u PROP\u POS\MSEC))
ret,frame=video.read()
如果ret==True:
如果cv2.waitKey(25)&0xFF==ord('q'):
打破
其他:
打破
如果(500<代码>如果(500)您的代码有两个函数定义和两行。这两行不调用您定义的函数。这在您的计算机上运行吗?@DaemonPainter问题已解决,谢谢您的时间守护程序。我将关闭此问题。您的主要问题已解决吗?视频仍有颜色?@Toby是,现在保存的视频有颜色/灰色交替。
if(500<=int(video.get(cv2.CAP_PROP_POS_MSEC))<1000 or 2000<=int(video.get(cv2.CAP_PROP_POS_MSEC))<3000):
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
**gray_2=cv2.cvtColor(gray,cv2.COLOR_GRAY2BGR)**
**cv2.imshow('frame',gray_2)**
**c.write(gray_2)**
else:
c.write(frame)
cv2.imshow('frame',frame)