Python 2.7 录制和显示opencv网络摄像头视频

我正在尝试使用wx按钮保存网络摄像头直播流

这是我的密码

import wx
import vlc
import numpy as np
import time
import os
import user
import cv
import datetime

class MainWindow(wx.Panel):
    def __init__(self, parent,capture):
        wx.Panel.__init__(self, parent)
        mainSizer = wx.BoxSizer(wx.VERTICAL)

# video
        videoWarper = wx.StaticBox(self,size=(640,480))
        videoBoxSizer = wx.StaticBoxSizer(videoWarper, wx.VERTICAL)
        videoFrame = wx.Panel(self, -1,size=(640,480))
        videoBoxSizer.Add(videoFrame,0)
        capture = ShowCapture(videoFrame, capture)
        mainSizer.Add(videoBoxSizer,0)

        parent.Centre()
        self.Show()
        self.SetSizerAndFit(mainSizer)

# Panels
# The first panel holds the video and it's all black
        self.videopanel = wx.Panel(self, -1)
        self.videopanel.SetBackgroundColour(wx.BLACK)

# The second panel holds controls
        ctrlpanel = wx.Panel(self, -1 )
        self.timeslider = wx.Slider(ctrlpanel, -1, 0, 0, 1000)
        self.timeslider.SetRange(0, 1000)
        record = wx.Button(ctrlpanel, label="Record")

# Bind controls to events
        self.Bind(wx.EVT_BUTTON, self.OnRecord, record)

# Give a pretty layout to the controls
        ctrlbox = wx.BoxSizer(wx.VERTICAL)
        box = wx.BoxSizer(wx.HORIZONTAL)

# box contains some buttons
        box.Add(record)

# Merge box to the ctrlsizer
        ctrlbox.Add(box, flag=wx.EXPAND, border=10)
        ctrlpanel.SetSizer(ctrlbox)

# Put everything togheter
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(ctrlpanel, flag=wx.EXPAND | wx.BOTTOM | wx.TOP, border=10)
        self.SetSizer(sizer)
        self.SetMinSize((350, 300))

# VLC player controls
        self.Instance = vlc.Instance()
        self.player = self.Instance.media_player_new()

# -------begin capturing and saving video
    def OnRecord(self, evt):
        capture = cv.CaptureFromCAM(0)
        fps = 8
        size = (640, 480)

        writer = cv.CreateVideoWriter('video.avi', cv.CV_FOURCC('D', 'I', 'V', 'X'), fps, size);
        i = 0

        while i < 1000:
             frame = cv.QueryFrame(capture)

             frame2 = cv.CreateImage(size, 8, 3)
             cv.CvtColor(frame, frame2, cv.CV_cv.CvtColor(frame, frame2, cv.CV_BGR2RGB))

             cv.WriteFrame(writer, frame2)
             # cv.WaitKey(1000/fps)

class ShowCapture(wx.Panel):

def __init__(self, parent, capture, fps=9):
    wx.Panel.__init__(self, parent, wx.ID_ANY, (0,0), (640,480))

    self.capture = capture
    ret, frame = self.capture.read()

    height, width = frame.shape[:2]

    parent.SetSize((width, height))

    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

    self.bmp = wx.BitmapFromBuffer(width, height, frame)

    self.timer = wx.Timer(self)
    self.timer.Start(1000./fps)

    self.Bind(wx.EVT_PAINT, self.OnPaint)
    self.Bind(wx.EVT_TIMER, self.NextFrame)

def OnPaint(self, evt):
    dc = wx.BufferedPaintDC(self)
    dc.DrawBitmap(self.bmp, 0, 0)

def NextFrame(self, event):
    ret, frame = self.capture.read()
    if ret:
        frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        self.bmp.CopyFromBuffer(frame)
        self.Refresh()

capture = cv2.VideoCapture(0)

app = wx.App(False)
frame = wx.Frame(None, title='CamGUI')
panel = MainWindow(frame, capture)
frame.Show()
app.MainLoop()

希望得到一些专家建议：）

---

注意-我使用的是Raspberry pi。

您声明捕获4次，我不相信

capture=ShowCapture（视频帧，捕获）

是一个好主意。尝试在每个捕获变量的名称中添加一个数字，看看这是否能为您提供里程数。我对代码做了一些更改。如果我错了，请您看一下并更正我@Rolfofsaxony没办法，对不起，我没有设备。看看这里，他正在使用

picamera

模块来做这类事情。没问题，我会浏览这个链接。谢谢你：）你宣布捕获4次，我不相信

capture=ShowCapture（videoFrame，capture）

是个好主意。尝试在每个捕获变量的名称中添加一个数字，看看这是否能为您提供里程数。我对代码做了一些更改。如果我错了，请您看一下并更正我@Rolfofsaxony没办法，对不起，我没有设备。看看这里，他正在使用

picamera

模块来做这类事情。没问题，我会浏览这个链接。谢谢你：）

Traceback (most recent call last):
   File "home/pi/record.py", line 76 in OnRecord
      cv.CvtColor(frame, frame2, cv.CV_RGB2XYZ) 
cv2.error: scn ==3 || scn ==4