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Take Frame from avi without show any frame Started by ShodawN at 07-23-2008 11:33. Topic has 7 replies. LEAD Support Fo... » Developer » Multimedia » Take Frame from avi without show any frame

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07-23-2008, 11:33 ShodawN Joined on 07-15-2008 Posts 11 Take Frame from avi without show any frame Hello, Can i take a frame from avi file without show any frame? Using VB.Net 2005 and Multimedia SDK v15? Thank you    Report

07-23-2008, 11:47 jigar Joined on 08-22-2007 Posts 480 Re: Take Frame from avi without show any frame You have to hide the play control if it is visible.  Then you just call SaveStillBitmap() or GetStillDIB() and it will get the frame it is currently at.  To get a frame from any video file, it has to be loaded in a control. LEADTOOLS Technical Support    Report

07-23-2008, 13:59 ShodawN Joined on 07-15-2008 Posts 11 Re: Take Frame from avi without show any frame If i use SaveStillBitmap when i'm playing a video i have an exception.    Report

07-23-2008, 16:54 jigar Joined on 08-22-2007 Posts 480 Re: Take Frame from avi without show any frame What exception do you get? LEADTOOLS Technical Support    Report

07-28-2008, 6:38 ShodawN Joined on 07-15-2008 Posts 11 Re: Take Frame from avi without show any frame Hello, I get a InvalidActiveXStateException. If i set AxltmmPlayCtrl.Visible= false, i get an InvalidActiveXStateException. If i set AxltmmPlayCtrl.Visible= true, i get a timeout from GetStillPicture method. My code is: -----------------------------------------         Dim img As Image = Nothing         Dim r As New AxltmmPlayCtrl()         r.Location = New Point(10, 10)         r.Width = 10         r.Height = 10         r.Visible = False         Me.Controls.Add(r)         Try             r.sourcefile = filename             img = r.GetStillPicture(500)         Catch         End Try         r.Stop()         r.Dispose()         r = Nothing         GC.Collect() ----------------------------------------- Thank you    Report

07-29-2008, 18:01 jigar Joined on 08-22-2007 Posts 480 Re: Take Frame from avi without show any frame I'm going to test this out and report back to you tomorrow.  I think there is another post you created that is related to this.  I'll answer that too. LEADTOOLS Technical Support    Report

07-30-2008, 17:49 jigar Joined on 08-22-2007 Posts 480 Re: Take Frame from avi without show any frame I tried it out with your code and got the same error.  But when I drag and drop the AxltmmPlayCtrl on to the form then it works when I call GetStillDIB/Picture.  The Visible property has no affect on that method call.  I think you are doing the same thing the ltmmCaptureCtrl in your other thread.  As a work around you can add the play control through the WinForms designer and set the Visible property to false.  I will check this with our engineers and find out if it is a bug. LEADTOOLS Technical Support    Report

08-04-2008, 10:21 jigar Joined on 08-22-2007 Posts 480 Re: Take Frame from avi without show any frame So after some testing/trial & error, I figured out you have to do this.             AxLTMMLib.AxltmmPlayCtrl player = new AxLTMMLib.AxltmmPlayCtrl();             ((System.ComponentModel.ISupportInitialize)(player)).BeginInit();             this.Controls.Add(this.player);             ((System.ComponentModel.ISupportInitialize)(player)).EndInit(); What it is doing is creating a new play control.  Then type casting it to ISupportInitialize and calling the BeginInit() of that object.  Then it adds the player to the form, and type casts it to call EndInit().  I know you are programming in VB.NET so I explained the code a little.  After you do that you just set the Visible property to false.  Set the sourcefile property.  Then you can call GetStillDIB().  You don't have to set the Size or Location property of the player control.  Let me know how it goes for you. LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » Multimedia » Take Frame from avi without show any frame

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