Set Low FPS To Get Min File Size for Screen Video - VB.NET
Screen Capturing SDK sample in VB.NET demonstrating ‘Set Low FPS To Get Min File Size for Screen Video’
Module1.vb
Imports System.Threading
Imports System.Diagnostics
Imports BytescoutScreenCapturingLib ' import bytescout screen capturer activex object
' 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
Sub Main()
' create capturer class
Dim capturer As New Capturer()
' set capturing area to the region type (to capture from given region on the screen)
capturer.CapturingType = CaptureAreaType.catScreen
' output video filename
capturer.OutputFileName = "LowFPS.wmv" ' set output video filename to .WMV or .AVI file
' set width and height of output video
capturer.OutputWidth = 640
capturer.OutputHeight = 480
' // 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
' set WMV video codec to Windows Media Video 9 Screen that gives best quality/size ratio when recording from screen
capturer.CurrentWMVVideoCodecName = "Windows Media Video 9 Screen"
' disable audio so we will have a video only (and the lowest wmv file size as possible: about 20 kb per 1 second, about 70 mb per 1 hour
capturer.AudioEnabled = False
' set FPS to 0.5 fps (1 frame per every 2 seconds)
' you may also want to set to 1 fps (1 frame per 1 second or higher)
capturer.FPS = 0.50
' set the text overlay with autochanging time stamp macros to indicate playing time and current date time
capturer.OverlayingRedTextCaption = "Recording: {RUNNINGMIN}:{RUNNINGSEC}:{RUNNINGMSEC} on {CURRENTYEAR}-{CURRENTMONTH}-{CURRENTDAY} at {CURRENTHOUR}:{CURRENTMIN}:{CURRENTSEC}:{CURRENTMSEC}"
' uncomment to enable recording of semitransparent or layered windows (Warning: may cause mouse cursor flickering)
' capturer.CaptureTransparentControls = true
' uncomment to set Bytescout Lossless Video format output video compression method
' do not forget to set file to .avi format if you use Video Codec Name
' capturer.CurrentVideoCodecName = "Bytescout Lossless"
' start capturing.
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("Capturing entire screen for 5 seconds...")
' wait for 5 seconds
Thread.Sleep(5000)
' stop capturing and flush AVI video file into the disk
capturer.Stop()
' Release(Resources)
System.Runtime.InteropServices.Marshal.ReleaseComObject(capturer)
capturer = Nothing
Console.WriteLine("Done.")
' open the output video
Process.Start("LowFPS.wmv")
End Sub
End Module
Resources.Designer.vb
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