我写了下面的代码来从相机读取视频以显示和保存 .
当我在VideoCapture（0）中使用选项0运行以下代码时，它工作正常并显示我的网络摄像头视频，当我在VideoCapture（1）中将其更改为1以从第三方摄像头获取视频时，我收到错误 .
我正在使用第三方相机，他们的软件播放视频，我需要使用我的python代码捕获..
使用apbase code qt示例也播放视频
我无法使用下面的python代码
import cv2
import numpy as np
import time
def nothing(x):
pass
cv2.namedWindow('images')
switch = 'Recording'
cv2.createTrackbar(switch, 'images',0,1,nothing)
cap = cv2.VideoCapture(0)
def writeVideo(frmae):
pass
switchstatus = 0
currentpos = 0
fourccs = cv2.VideoWriter_fourcc(*'MJPG')
out = cv2.VideoWriter('sample.avi', fourccs, 20.0, (640,480))
created = 0
startrecord = 0
def RecordVideo(frame):
global out
global created;
global startrecord
print "In the Record video" ,created, startrecord
if created == 0 and startrecord ==1:
filename ='test.avi'
filename=time.strftime("%Y-%m-%d-%H-%M-%S")+'.avi'
print "filename", filename
out = cv2.VideoWriter(filename,fourccs, 20.0, (640,480))
created = 1;
out.write(frame)
elif created == 1 and startrecord ==1:
out.write(frame)
def positionChanged(s):
global currentpos
global created
global startrecord
print "position changed", s
currentpos = s
if s==1:
startrecord = 1
created = 0
else:
startrecord = 0
if created==1:
created =0
out.release()
def switchchanged(s):
global switchstatus;
if switchstatus != s:
switchstatus = s
positionChanged(s)
while(1):
ret, frame = cap.read()
RecordVideo(frame)
cv2.imshow('images',frame)
s = cv2.getTrackbarPos(switch,'images')
switchchanged(s)
if cv2.waitKey(1) & 0xFF == ord('q'):
out.release()
cv2.destroyAllWindows()
break
错误
文件“C：\ Python32Bit \ video.py，lime 89，in cv2.imshow（'images'，frame）
eror：........ \ opencv \ modules \ hihggui \ src \ window.cpp：错误：（ - 215）size.width> 0 && size.height> 0 in function cv :: imshow
1 回答
我通过从Windows硬件设置菜单禁用内置网络摄像头来实现此功能 . 我在一个朋友's computer so I don'现在可以访问它，但检查this . 我相信windows不会让openCV使用任何其他视频捕获设备而是使用0，所以你必须在硬件列表中制作你想要使用的第一个摄像头 .