我想知道是否有任何方法可以使用 .NET 捕获我的桌面的视频(截屏)?我不是在寻找截屏软件,而只是一种可以让我自己生成桌面视频的技术。
我想拍摄多个屏幕截图,但我不确定如何以编程方式生成带有一系列图像的视频......
有人有想法吗?
谢谢!
我想知道是否有任何方法可以使用 .NET 捕获我的桌面的视频(截屏)?我不是在寻找截屏软件,而只是一种可以让我自己生成桌面视频的技术。
我想拍摄多个屏幕截图,但我不确定如何以编程方式生成带有一系列图像的视频......
有人有想法吗?
谢谢!
是的,有很多方法可以做到这一点。这是使用 WPF 的一种非常简单的方法。好用,我以前用过。
http://www.sythe.org/showthread.php?t=175353
从网站:
创建一个新的 WPF 应用程序,添加对 System.Drawing.dll 和 System.Windows.Forms.dll 的引用。使用您所期望的方法,Stat、Stop 和 Save。
Public Class ScreenRecorder
Private Shared tempDir As String = My.Computer.FileSystem.SpecialDirectories.Temp & "\snapshot\"
Private Shared snap As New System.Threading.Thread(AddressOf Snapshot)
Private Shared _Bounds As System.Drawing.Rectangle = System.Windows.Forms.Screen.PrimaryScreen.Bounds
Public Shared Property Bounds() As System.Drawing.Rectangle
Get
Return _Bounds
End Get
Set(ByVal value As System.Drawing.Rectangle)
_Bounds = value
End Set
End Property
Private Shared Sub Snapshot()
If Not My.Computer.FileSystem.DirectoryExists(tempDir) Then _
My.Computer.FileSystem.CreateDirectory(tempDir)
Dim Co As Integer = 0
Do
Co += 1
System.Threading.Thread.Sleep(50)
Dim X As New System.Drawing.Bitmap(_Bounds.Width, _Bounds.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb)
Using G = System.Drawing.Graphics.FromImage(X)
G.CopyFromScreen(_Bounds.Location, New System.Drawing.Point(), _Bounds.Size)
Dim CurBounds As New System.Drawing.Rectangle(System.Windows.Forms.Cursor.Position - Bounds.Location, System.Windows.Forms.Cursor.Current.Size)
Forms.Cursors.Default.Draw(G, CurBounds)
End Using
Dim FS As New IO.FileStream(tempDir & FormatString(Co.ToString, 5, "0"c) & ".png", IO.FileMode.OpenOrCreate)
X.Save(FS, System.Drawing.Imaging.ImageFormat.Png)
X.Dispose()
FS.Close()
Loop
End Sub
Public Shared Sub ClearRecording()
If My.Computer.FileSystem.DirectoryExists(tempDir) Then _
My.Computer.FileSystem.DeleteDirectory(tempDir, FileIO.DeleteDirectoryOption.DeleteAllContents)
My.Computer.FileSystem.CreateDirectory(tempDir)
End Sub
Public Shared Sub Save(ByVal Output As String)
Dim G As New Windows.Media.Imaging.GifBitmapEncoder
Dim X As New List(Of IO.FileStream)
For Each Fi As String In My.Computer.FileSystem.GetFiles(tempDir, FileIO.SearchOption.SearchTopLevelOnly, "*.png")
Dim TempStream As New IO.FileStream(Fi, IO.FileMode.Open)
Dim Frame = Imaging.BitmapFrame.Create(TempStream)
X.Add(TempStream)
G.Frames.Add(Frame)
Next
Dim FS As New IO.FileStream(Output, IO.FileMode.OpenOrCreate)
G.Save(FS)
FS.Close()
For Each St As IO.FileStream In X
St.Close()
Next
End Sub
Public Shared Sub Start()
snap = New System.Threading.Thread(AddressOf Snapshot)
snap.Start()
End Sub
Public Shared Sub [Stop]()
snap.Abort()
End Sub
Private Shared Function FormatString(ByVal S As String, ByVal places As Integer, ByVal character As Char) As String
If S.Length >= places Then Return S
For X As Integer = S.Length To places
S = character & S
Next
Return S
End Function
End Class
这是使用托管 DirectX 的另一种方法
http://www.mdxinfo.com/resources/screencapture.php
另一个资源:
http://www.codeproject.com/KB/audio-video/CaptureScreenAsVideo.aspx
我相信我不久前使用DirectShowNet 库做了类似的事情。它可能会帮助你。