无法在python open cv上使用此代码录制视频
尝试在python中使用opencv录制视频时,我使用了videowrite()方法录制视频,但我显示了错误。此错误显示“需要一个整数(Get type noneType)”。需要此错误的解决方案无法在python open cv上使用此代码录制视频,python,opencv,cv2,Python,Opencv,Cv2,尝试在python中使用opencv录制视频时,我使用了videowrite()方法录制视频,但我显示了错误。此错误显示“需要一个整数(Get type noneType)”。需要此错误的解决方案 import numpy as np import os import cv2 filename = 'video.avi' frames_per_sec = 24.0 my_res = '720p' def change_res(cap,width,height): cap.set(3,
import numpy as np
import os
import cv2
filename = 'video.avi'
frames_per_sec = 24.0
my_res = '720p'
def change_res(cap,width,height):
cap.set(3,width)
cap.set(4,height)
STD_DIMENSIONS= {
"480p": (640, 480),
"720p": (1280, 720),
"1080p": (1920, 1080),
"4k": (3840, 2160),
}
def get_dims(cap, res = '1080p'):
width, height = STD_DIMENSIONS['480p']
if res in STD_DIMENSIONS:
width, height = STD_DIMENSIONS[res]
change_res(cap,width,height)
return width,height
VIDEO_TYPE = {
'avi' : cv2.VideoWriter_fourcc(*'XVID'),
'mp4' : cv2.VideoWriter_fourcc(*'XVID'),
}
def get_video_type(filename):
filename, ext = os.path.splitext(filename)
if ext in VIDEO_TYPE:
return VIDEO_TYPE[ext]
return VIDEO_TYPE['avi']
cap = cv2.VideoCapture(0)
dims = get_dims(cap,res=my_res)
video_type_cv2 = get_video_type(filename)
out = cv2.VideoWriter(filename,video_type_cv2,frames_per_sec,dims)
while(True):
ret, frame = cap.read()
out.write(frame)
cv2.imshow('frame',frame)
if cv2.waitkey(20) & 0xFF == ord('q'):
break
cap.release()
out.release()
cv2.destroyAllWindows()
输出:
Traceback (most recent call last):
File "video.py", line 40, in <module>
out = cv2.VideoWriter(filename,video_type_cv2,frames_per_sec,dims)
TypeError: an integer is required (got type NoneType)
[ WARN:0] terminating async callback
回溯(最近一次呼叫最后一次):
文件“video.py”,第40行,在
out=cv2.VideoWriter(文件名、视频类型、每秒帧数、dims)
TypeError:需要一个整数(获取类型NoneType)
[警告:0]正在终止异步回调
您正在使用获取视频类型中的os.path.splitext
# filename = 'video.avi'
filename, ext = os.path.splitext(filename)
# Now filename = 'video' , and ext = '.avi'
您需要的是ext='avi'
,它未在get\u video\u type
中处理,并返回None
。这是函数的to doc。当扩展名不是avi
或mp4
之一时,get\u video\u type
函数返回None
。