VideoRendererElement

Source code checked in, #80132

Project Collection Service Accounts — Mon, 01 Oct 2012 21:49:39 GMT

Upgrade: New Version of LabDefaultTemplate.xaml. To upgrade your build definitions, please visit the following link: http://go.microsoft.com/fwlink/?LinkId=254563

Source code checked in, #80131

Project Collection Service Accounts — Mon, 01 Oct 2012 21:43:10 GMT

Checked in by server upgrade

New Post: crashed in .Net 4.0

romanminyaylov — Mon, 25 Jun 2012 16:51:02 GMT

I've changed target framework to 4.0, recompile it, and, got exceptions...

Any ideas?

New Post: Selecting the right webcam resolution

SvenWS — Tue, 06 Sep 2011 07:44:29 GMT

I was wondering why the capturedevice class of the sample only works with 640x480 resolution of connected webcams. I found that overwriting the BMIHeader of the VideoStreamConfig structure of the media format you from GetFormat is not working. So I extended the SetConfigParms method in following way: Instead of using GetFormat to retriev the media structure I enum all possible formats (VideoStreamConfig.GetNumberOfCapabilities and VideoStreamConfig.GetStreamCaps), select the media format I want to use and write this structure back.

Here is the method extended SetConfigParms (sorry I translated the whole class to vb.net)

    ' Set the Framerate, and video size
    Private Sub SetConfigParms(ByVal capGraph As ICaptureGraphBuilder2, ByVal capFilter As IBaseFilter, ByVal iFrameRate As Integer, ByVal iWidth As Integer, ByVal iHeight As Integer)
        Dim hr As Integer
        Dim o As Object
        Dim media As AMMediaType
        Dim FoundFormat As Boolean
        ' Find the stream config interface
        hr = capGraph.FindInterface(PinCategory.Capture, MediaType.Video, capFilter, GetType(IAMStreamConfig).GUID, o)
        Dim videoStreamConfig As IAMStreamConfig = CType(o, IAMStreamConfig)

        If (videoStreamConfig Is Nothing) Then
            Throw New Exception("Failed to get IAMStreamConfig")
        End If


        Dim iCount As Integer = 0, iSize As Integer = 0
        videoStreamConfig.GetNumberOfCapabilities(iCount, iSize)
        Dim pmtConfig As New AMMediaType
        For iFormat As Integer = 0 To iCount - 1
            Dim scc As New VideoStreamConfigCaps, pScc As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(scc))

            hr = videoStreamConfig.GetStreamCaps(iFormat, pmtConfig, pScc)
            DsError.ThrowExceptionForHR(hr)
            Marshal.PtrToStructure(pScc, scc)

            '' copy out the videoinfoheader
            Dim header As VideoInfoHeader = New VideoInfoHeader
            Marshal.PtrToStructure(pmtConfig.formatPtr, header)

            ''Examine the format, and possibly use it. 
            If pmtConfig.subType = MediaSubType.RGB24 Then
                Debug.Print("iFormat: " & header.BmiHeader.Width & "x" & header.BmiHeader.Height)
                If header.BmiHeader.Width = iWidth And header.BmiHeader.Height = iHeight Then
                    If (iFrameRate > 0) Then
                        'header.AvgTimePerFrame = (10000000 / iFrameRate)
                    End If
                    hr = videoStreamConfig.SetFormat(pmtConfig)
                    DsError.ThrowExceptionForHR(hr)
                    FoundFormat = True
                End If
            End If

            ''Delete the media type when you are done.
            Marshal.DestroyStructure(pScc, GetType(VideoStreamConfigCaps))
            Marshal.DestroyStructure(pmtConfig.formatPtr, GetType(VideoInfoHeader))
            DsUtils.FreeAMMediaType(pmtConfig)
            pmtConfig = Nothing
            header = Nothing
            scc = Nothing

        Next

        If Not FoundFormat Then
            ' Get the existing format block
            hr = videoStreamConfig.GetFormat(media)
            DsError.ThrowExceptionForHR(hr)
            ' copy out the videoinfoheader
            Dim v As VideoInfoHeader = New VideoInfoHeader
            Marshal.PtrToStructure(media.formatPtr, v)
            ' if overriding the framerate, set the frame rate
            If (iFrameRate > 0) Then
                v.AvgTimePerFrame = (10000000 / iFrameRate)
            End If
            ' if overriding the width, set the width
            If (iWidth > 0) Then
                v.BmiHeader.Width = iWidth
            End If
            ' if overriding the Height, set the Height
            If (iHeight > 0) Then
                v.BmiHeader.Height = iHeight
            End If
            ' Copy the media structure back
            Marshal.StructureToPtr(v, media.formatPtr, False)
            ' Set the new format
            hr = videoStreamConfig.SetFormat(media)
            DsError.ThrowExceptionForHR(hr)
            DsUtils.FreeAMMediaType(media)
            media = Nothing
        End If
    End Sub

Whith that enum it's also very easy to examin the possible resolutions of a webcam.

SvenWS

Created Issue: VideorendererElement not working under WPF 4.0 [9138]

SvenWS — Tue, 06 Sep 2011 07:27:19 GMT

Unfortunaly the VideoRendererElement ist not working any more with WPF 4.0!

The magic isn't happen any more at this code block in the VideoRendererElement.cs
/* Make the magic happen - The callback
* should execute next on another thread
* created by WMP OCX under the covers */
m_mediaElement.Play();

I looked to other implentations (I think a lot of them use this kind of hack) and they also have a problem with WPF 4.0.
If somebody can tell me/us what is (or what is not) happing here, we can try to fix this.

SvenWS

New Post: Compatibility problems

laci37 — Mon, 08 Aug 2011 18:29:34 GMT

I have successfully registered the .ax file both on my netbook(Win7 Starter) and my desktop machine (Win7 Ultimate), but the VideoRendererElement refuses to work on my netbook. What could be the problem?

New Comment on "Screen Shots"

liguang_ios — Mon, 10 Jan 2011 15:52:57 GMT

It doesn't work at all!!!

New Comment on "Frequently Asked Questions"

no1chou — Tue, 04 Jan 2011 18:16:56 GMT

How about if I want two cameras on the screen concurrently ?

New Post: Playing videos in sync

makuat — Mon, 03 Jan 2011 17:09:03 GMT

Hi,

I have the following requirement: there are 3 videos which have to be played synchronously. (e.g a classical concert with 3 perspectives for conductor, orchestra and soloist)

With the default WPF MedialElement it seems this is not possible to be in sync.

So my question: is it possible to achieve this with "VideoRendererElement"? Does anybody know a solution for my problem?

Any help would be welcome.

TIA

Regards

Martin

New Post: Problem loading the designer

eileenkho — Sat, 11 Sep 2010 02:02:48 GMT

Dear all,

I have a problem loading the designer due to assembly 'VideoRendererElement' was not found. Any suggestion on how to solve that?

Besides, I wonder how can I make the live images without reflection? I am not good in programming, but I guess is changing the pixel accessed. I will be grateful if there is a guide or advice on how I can achieve that.

Any suggestions are welcomed. Thank you in advance.

New Post: Image capture of video

sevententh — Wed, 11 Aug 2010 08:38:15 GMT

Hi,

Is it possible to capture an image of the live video stream?

New Post: Image caption of video

sevententh — Wed, 11 Aug 2010 08:37:46 GMT

Hi,

Is it possible to capture an image of the live video stream?

Source code checked in, #55373

_TFSSERVICE — Mon, 02 Aug 2010 22:49:34 GMT

Checked in by server upgrade

Commented Issue: Disconnected Network adapter leads to failure! [5499]

jgarrets — Tue, 04 May 2010 17:10:07 GMT

Hi,

i have tried it on 4 different machines now.
Disconect your machien from network an reboot. Starting the Testapplication will show, that the control is not loaded anymore and no test can be performed.
As you reconnect to the network (plug cable back in) you can restart the application and everything works just fine.

This is reproducable.
Comments: ** Comment from web user: jgarrets **

I have the same problem! The renderer doesn't seem to initialize properly when there is no internet connection. Reconnect to the internet and it works fine. Have you found a solution for this?!

New Post: Internet connection required?

jgarrets — Tue, 04 May 2010 16:44:31 GMT

It seems that the VideoRendererElement won't initialize properly if my computer does not have an internet connection. It just quietly fails (no exceptions or anything) and the RendererInitialized event never occurs. Has anyone else seen this?! Does it have to do with the online XAML schemas or something? We need to deploy our application on offline computers...what do I do?

New Post: MPEG-2 on VideoRendererElement

wookie_rookie — Fri, 09 Apr 2010 18:37:05 GMT

Hi,

i have an MPEG-2 Demux and MPEG-2 Decoder in my Graph.

[DVB Source] --> [Demux] --> [Decoder] --> [Video Renderer]

Any idea how to put my SampleGrabber between decoder and renderer?

Or any other idea how to render this graph onto the VideoRenderElement?

Decoder output type is DXVA and SampleGrabber cannot connect.

I would be grateful for any ideas..

Created Issue: Disconnected Network adapter leads to failure! [5499]

Jaster — Thu, 04 Mar 2010 16:20:42 GMT

Reviewed: v0.15 Beta (Dec 03, 2009)

zhichien — Thu, 03 Dec 2009 09:02:11 GMT

Rated 3 Stars (out of 5) - Hi how to register the .ax file with regsvr32? I'm using Vista. The executable file under Release folder gave 3 buttons on top and black background with no effect on clicked button. I was trying to investigate into the code but can't open it using VC#.

Reviewed: v0.15 Beta (out 28, 2009)

vnarcizo — Thu, 29 Oct 2009 01:56:51 GMT

Rated 1 Stars (out of 5) - AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAa AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAa AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAaAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAa

New Post: Deployment

jgarrets3 — Thu, 03 Sep 2009 16:03:28 GMT

This seems to work:

                Assembly assembly = Assembly.GetExecutingAssembly();
                Stream stream = assembly.GetManifestResourceStream("MyApp.Resources.DShowMediaBridge.ax"); // or whatever
                BinaryReader br = new BinaryReader(stream);
                string destPath = AppDomain.CurrentDomain.BaseDirectory + "\\DShowMediaBridge.ax";
                FileStream fs = new FileStream(destPath, FileMode.Create);
                BinaryWriter bw = new BinaryWriter(fs);
                byte[] ba = new byte[stream.Length];
                stream.Read(ba, 0, ba.Length);
                bw.Write(ba);
                br.Close();
                bw.Close();
                fs.Close();
                stream.Close();
                Process.Start("regsvr32.exe", "/s " + "DShowMediaBridge.ax"); // register dll silently'




Basically, I add the .ax file as a resource in my project with a build action of "Embedded Resource."  The above code pulls it out of the assembly at run-time, writes it to disk, and then registers it with regsvr32.
I run this "on-load" and it seems to be working.

Anybody know what to do about the "tearing" effects and the line of "noise" along the bottom of the video?  Is anybody else seeing that?