Link Search Menu Expand Document

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
��'------------------------------------------------------------------------------

' <auto-generated>

'     This code was generated by a tool.

'     Runtime Version:2.0.50727.4918

'

'     Changes to this file may cause incorrect behavior and will be lost if

'     the code is regenerated.

' </auto-generated>

'------------------------------------------------------------------------------



Option Strict On

Option Explicit On





Namespace My.Resources

    

    'This class was auto-generated by the StronglyTypedResourceBuilder

    'class via a tool like ResGen or Visual Studio.

    'To add or remove a member, edit your .ResX file then rerun ResGen

    'with the /str option, or rebuild your VS project.

    '<summary>

    '  A strongly-typed resource class, for looking up localized strings, etc.

    '</summary>

    <Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "2.0.0.0"),  _

     Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _

     Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute(),  _

     Global.Microsoft.VisualBasic.HideModuleNameAttribute()>  _

    Friend Module Resources

        

        Private resourceMan As Global.System.Resources.ResourceManager

        

        Private resourceCulture As Global.System.Globalization.CultureInfo

        

        '<summary>

        '  Returns the cached ResourceManager instance used by this class.

        '</summary>

        <Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _

        Friend ReadOnly Property ResourceManager() As Global.System.Resources.ResourceManager

            Get

                If Object.ReferenceEquals(resourceMan, Nothing) Then

                    Dim temp As Global.System.Resources.ResourceManager = New Global.System.Resources.ResourceManager("CaptureScreenVB.Resources", GetType(Resources).Assembly)

                    resourceMan = temp

                End If

                Return resourceMan

            End Get

        End Property

        

        '<summary>

        '  Overrides the current thread's CurrentUICulture property for all

        '  resource lookups using this strongly typed resource class.

        '</summary>

        <Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _

        Friend Property Culture() As Global.System.Globalization.CultureInfo

            Get

                Return resourceCulture

            End Get

            Set(ByVal value As Global.System.Globalization.CultureInfo)

                resourceCulture = value

            End Set

        End Property

    End Module

End Namespace


Settings.Designer.vb
��'------------------------------------------------------------------------------

' <auto-generated>

'     This code was generated by a tool.

'     Runtime Version:2.0.50727.4918

'

'     Changes to this file may cause incorrect behavior and will be lost if

'     the code is regenerated.

' </auto-generated>

'------------------------------------------------------------------------------



Option Strict On

Option Explicit On





Namespace My



    <Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute(),  _

     Global.System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "8.0.0.0"),  _

     Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _

    Partial Friend NotInheritable Class MySettings

        Inherits Global.System.Configuration.ApplicationSettingsBase

        

        Private Shared defaultInstance As MySettings = CType(Global.System.Configuration.ApplicationSettingsBase.Synchronized(New MySettings), MySettings)

        

#Region "My.Settings Auto-Save Functionality"

#If _MyType = "WindowsForms" Then

        Private Shared addedHandler As Boolean



        Private Shared addedHandlerLockObject As New Object



        <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(), Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)> _

        Private Shared Sub AutoSaveSettings(ByVal sender As Global.System.Object, ByVal e As Global.System.EventArgs)

            If My.Application.SaveMySettingsOnExit Then

                My.Settings.Save()

            End If

        End Sub

#End If

#End Region

        

        Public Shared ReadOnly Property [Default]() As MySettings

            Get

                

#If _MyType = "WindowsForms" Then

                   If Not addedHandler Then

                        SyncLock addedHandlerLockObject

                            If Not addedHandler Then

                                AddHandler My.Application.Shutdown, AddressOf AutoSaveSettings

                                addedHandler = True

                            End If

                        End SyncLock

                    End If

#End If

                Return defaultInstance

            End Get

        End Property

    End Class

End Namespace



Namespace My

    

    <Global.Microsoft.VisualBasic.HideModuleNameAttribute(),  _

     Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _

     Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute()>  _

    Friend Module MySettingsProperty

        

        <Global.System.ComponentModel.Design.HelpKeywordAttribute("My.Settings")>  _

        Friend ReadOnly Property Settings() As Global.CaptureScreenVB.My.MySettings

            Get

                Return Global.CaptureScreenVB.My.MySettings.Default

            End Get

        End Property

    End Module

End Namespace


Download Source Code (.zip)

Return to the previous page Explore Screen Capturing SDK


Copyright © 2016 - 2021 ByteScout