Record Screen Video from Command Line Console - VB.NET
Screen Capturing SDK sample in VB.NET demonstrating ‘Record Screen Video from Command Line Console’
Module1.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Globalization
Imports System.Threading
Imports System.Runtime.InteropServices
Imports BytescoutScreenCapturingLib
' NOTE: if you are getting error like "invalid image" related to loading the SDK's dll then
' try to do the following:
' 1) remove the reference to the SDK by View - Solution Explorer
' then click on References, select Bytescout... reference name and right-click it and select Remove
' 2) To re-add click on the menu: Project - Add Reference
' 3) In "Add Reference" dialog switch to "COM" tab and find Bytescout...
' 4) Select it and click "Add"
' 5) Recompile the application
' Note: if you need to run on both x64 and x86 then please make sure you have set "Embed Interop Types" to True for this reference
Module Module1
Public Class Win32Interop
<DllImport("crtdll.dll")> _
Public Shared Function _kbhit() As Integer
End Function
End Class
Sub Main(ByVal args As String())
Dim capturer As New Capturer()
If args.Length < 1 Then
usage(capturer)
Exit Sub
End If
capturer.OutputFileName = args(0)
capturer.CapturingType = CaptureAreaType.catRegion
' set border style
capturer.CaptureAreaBorderType = CaptureAreaBorderType.cabtDashed
' uncomment to enable recording of semitransparent or layered windows (Warning: may cause mouse cursor flickering)
' capturer.CaptureTransparentControls = true
' // WMV and WEBM output use WMVVideoBitrate property to control output video bitrate
' // so try to increase it by x2 or x3 times if you think the output video are you are getting is laggy
' capturer.WMVVideoBitrate = capturer.WMVVideoBitrate * 2
setParams(args, capturer)
Try
capturer.Run()
' IMPORTANT: if you want to check for some code if need to stop the recording then make sure you are
' using Thread.Sleep(1) inside the checking loop, so you have the loop like
' Do
' Thread.Sleep(1)
' While StopButtonNotClicked
Console.WriteLine("Starting capture - Hit a key to stop ...")
Dim s As String = capturer.CurrentVideoCodecName
Console.WriteLine(String.Format("Using video compressor - {0}", s))
s = capturer.CurrentAudioCodecName
Console.WriteLine(String.Format("Using audio compressor - {0}", s))
s = capturer.CurrentAudioDeviceLineName
Console.WriteLine(String.Format("Using audio input line - {0}", s))
Dim i As Integer = 0
Dim spin As String = "|/-\"
While Win32Interop._kbhit() = 0
Console.Write(String.Format(vbCr & "Encoding {0}", spin(i)))
i = i + 1
i = i Mod 4
Thread.Sleep(50)
End While
capturer.Stop()
' Release(Resources)
System.Runtime.InteropServices.Marshal.ReleaseComObject(capturer)
capturer = Nothing
Console.Write(vbLf & "Done")
Console.Read()
Catch generatedExceptionName As Exception
Console.WriteLine(capturer.LastError)
End Try
End Sub
Private Sub usage(ByVal capturer As Capturer)
Console.WriteLine("Usage : CaptureScreenCSharp.exe <outfilename> [left] [top] [width] [height] [fps] [v-codec] [a-codec] [audioline]" & vbLf)
Console.WriteLine("[left, top, width, height] is the rectangle to be captured")
Console.WriteLine("[v-codec] is the index of the video codec in the list to use.")
Console.WriteLine("[a-codec] is the index of the audio codec in the list to use.")
Console.WriteLine("[audioline] is the index of the audio line in the list to capture from")
Console.WriteLine("If either codec is unspecified, it defaults to 'Microsoft Video 1' and 'GSM 6.10'")
Console.WriteLine("If audioline is unspecified, it uses the microphone")
Console.WriteLine("To capture the currently playing output, select the stereo, mono or wave mix")
Console.WriteLine("Installed Video Codecs (Note : Not all of them may work)")
For i As Integer = 0 To capturer.VideoCodecsCount - 1
Dim name As String = capturer.GetVideoCodecName(i)
Console.WriteLine(String.Format(" {0}. {1}", i, name))
Next
Console.WriteLine(vbLf & "Installed Audio Codecs (Note : Not all of them may work)")
For i As Integer = 0 To capturer.AudioCodecsCount - 1
Dim name As String = capturer.GetAudioCodecName(i)
Console.WriteLine(String.Format(" {0}. {1}", i, name))
Next
Console.WriteLine(vbLf & "Audio input lines")
For i As Integer = 0 To capturer.CurrentAudioDeviceLineCount - 1
Dim name As String = capturer.GetCurrentAudioDeviceLineName(i)
Console.WriteLine(String.Format(" {0}. {1}", i, name))
Next
End Sub
Private Sub setParams(ByVal args As String(), ByVal capturer As Capturer)
If args.Length > 1 Then
Dim left As Integer = Integer.Parse(args(1))
capturer.CaptureRectLeft = left
End If
If args.Length > 2 Then
Dim top As Integer = Integer.Parse(args(2))
capturer.CaptureRectTop = top
End If
If args.Length > 3 Then
Dim width As Integer = Integer.Parse(args(3))
capturer.CaptureRectWidth = width
End If
If args.Length > 5 Then
Dim height As Integer = Integer.Parse(args(5))
capturer.CaptureRectHeight = height
End If
If args.Length > 6 Then
Dim fps As Single = Single.Parse(args(6), CultureInfo.InvariantCulture)
capturer.FPS = fps
End If
If args.Length > 7 Then
Dim vCodec As Integer = Integer.Parse(args(7))
capturer.CurrentVideoCodec = vCodec
End If
If args.Length > 8 Then
Dim aCodec As Integer = Integer.Parse(args(8))
capturer.CurrentAudioCodec = aCodec
End If
If args.Length > 9 Then
Dim aLine As Integer = Integer.Parse(args(9))
capturer.CurrentAudioDeviceLine = aLine
End If
End Sub
End Module
Resources.Designer.vb
��' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
' <