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/Win/DirectShow/Select and Capture with Audio
Required plugins for this example: MBS Win Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Win/DirectShow/Select and Capture with Audio
This example is the version from Thu, 31th Jul 2019.
Project "Select and Capture with Audio.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Löschen"
Const kFileQuit = "Beenden"
Const kFileQuitShortcut = ""
EventHandler Sub Open()
if TargetWin32 then
// ok
else
MsgBox "This example requires Windows."
quit
end if
End EventHandler
End Class
Class Window1 Inherits Window
Control Canvas1 Inherits Canvas
ControlInstance Canvas1 Inherits Canvas
End Control
Control VList Inherits Listbox
ControlInstance VList Inherits Listbox
EventHandler Sub Change()
CheckButton
End EventHandler
End Control
Control ConnectButton Inherits BevelButton
ControlInstance ConnectButton Inherits BevelButton
EventHandler Sub Action()
dim VideoDevice as DirectShowMonikerMBS = VList.RowTag(vList.ListIndex)
dim AudioDevice as DirectShowMonikerMBS = AList.RowTag(vList.ListIndex)
// Bind Moniker to a filter object
videoInput = VideoDevice.BindBaseFilter
if VideoDevice.Lasterror<>0 then
MsgBox "VideoDevice.BindBaseFilter: "+VideoDevice.LasterrorMessage
end if
audioInput = AudioDevice.BindBaseFilter
if AudioDevice.Lasterror<>0 then
MsgBox "AudioDevice.BindBaseFilter: "+AudioDevice.LasterrorMessage
end if
if videoInput<>Nil and audioInput<>nil then
Capture
else
MsgBox "Failed to open devices."
end if
End EventHandler
End Control
Control AList Inherits Listbox
ControlInstance AList Inherits Listbox
EventHandler Sub Change()
checkButton
End EventHandler
End Control
EventHandler Sub Close()
CloseInterfaces
End EventHandler
EventHandler Sub Maximize()
if mc<>Nil then
mc.run
end if
End EventHandler
EventHandler Sub Minimize()
if mc<>Nil then
mc.StopWhenReady
end if
End EventHandler
EventHandler Sub Open()
if TargetWin32 then
list alist, DirectShowEnumMonikerMBS.CLSID_AudioInputDeviceCategory, "Audio Input"
list vlist, DirectShowEnumMonikerMBS.CLSID_VideoInputDeviceCategory, "Video Input"
end if
End EventHandler
EventHandler Sub Resized()
ResizeVideoWindow
End EventHandler
EventHandler Sub Resizing()
ResizeVideoWindow
End EventHandler
Function AblageRecord() As Boolean
dim f as FolderItem = GetSaveFolderItem(FileTypes1.All, "test.avi")
if f = nil then Return true
mc.stop
// record video
dim type as DirectShowGUIDMBS = DirectShowFileSinkFilterMBS.MEDIASUBTYPE_Avi
dim multiplexer as DirectShowBaseFilterMBS
dim sink as DirectShowFileSinkFilterMBS // destination
Capture.SetOutputFileName type, f.NativePath, multiplexer, sink
Capture.RenderStream(DirectShowPinMBS.PIN_CATEGORY_CAPTURE, Capture.MEDIATYPE_Video, VideoInput, nil, multiplexer)
Capture.RenderStream(DirectShowPinMBS.PIN_CATEGORY_CAPTURE, Capture.MEDIATYPE_Audio, AudioInput, nil, multiplexer)
dim m as DirectShowConfigAviMuxMBS = multiplexer.ConfigAviMux
m.MasterStream = 1
dim i as DirectShowConfigInterleavingMBS = multiplexer.ConfigInterleaving
i.mode = i.kInterleaveFull
mc.Run
Return True
End Function
Sub Add(dest as listbox, dev As DirectShowMonikerMBS, type as string)
// Microsoft calls it Displayname, but it looks more like some UniqueID
dim DisplayName as string = dev.DisplayName
dim p as DirectShowPropertyBagMBS = dev.Properties
if p<>nil then
// we show some properties
DisplayName = p.FriendlyName
end if
dest.AddRow DisplayName
dest.RowTag(dest.LastIndex) = dev
End Sub
Sub Capture()
const VFW_S_NOPREVIEWPIN = &h0004027E
const VFW_E_NOT_IN_GRAPH = &h8004025F
// Get DirectShow interfaces
GetInterfaces
// Attach the filter graph to the capture graph
Capture.SetFiltergraph(graph)
// Add Capture filter to our graph.
Graph.AddFilter VideoInput, "Video Capture"
if Graph.Lasterror<>0 then
MsgBox "Graph.AddFilter VideoInput: "+Graph.LasterrorMessage
end if
Graph.AddFilter AudioInput, "Audio Capture"
if Graph.Lasterror<>0 then
MsgBox "Graph.AddFilter AudioInput: "+Graph.LasterrorMessage
end if
// Render the preview pin on the video capture filter
Capture.RenderStream(DirectShowPinMBS.PIN_CATEGORY_PREVIEW, Capture.MEDIATYPE_Video, VideoInput)
if Capture.Lasterror<>0 and Capture.Lasterror<>VFW_S_NOPREVIEWPIN then
MsgBox "Graph.RenderStream VideoInput "+str(Capture.Lasterror)+": "+Capture.LasterrorMessage
end if
Capture.RenderStream(DirectShowPinMBS.PIN_CATEGORY_PREVIEW, Capture.MEDIATYPE_Audio, AudioInput)
if Capture.Lasterror<>0 and Capture.Lasterror<>VFW_S_NOPREVIEWPIN then
MsgBox "Graph.RenderStream AudioInput: "+str(Capture.Lasterror)+": "+Capture.LasterrorMessage
end if
// Set video window style and position
SetupVideoWindow
// Start previewing video data
mc.Run
if mc.Lasterror = 1 then // not yet ready, try again
mc.Run
end if
End Sub
Sub CheckButton()
ConnectButton.Enabled = alist.ListIndex >= 0 and VList.ListIndex >= 0
End Sub
Sub CloseInterfaces()
// Stop previewing data
if mc<>Nil then
mc.StopWhenReady
end if
// Stop receiving events
if mee<>nil then
'mee.SetNotifyWindow(
end if
// Relinquish ownership (IMPORTANT!) of the video window.
// Failing to call Owner setter can lead to assert failures within
// the video renderer, as it still assumes that it has a valid
// parent window.
if vw<>nil then
vw.Visible = false
vw.Owner = nil
end if
// Release DirectShow interfaces
mc = nil
mee = nil
vw = nil
Graph = nil
Capture = nil
End Sub
Sub GetInterfaces()
// Create the filter graph
graph = new DirectShowGraphBuilderMBS
// Create the capture graph builder
capture = new DirectShowCaptureGraphBuilderMBS
// Obtain interfaces for media control and Video Window
MC = Graph.MediaControl
VW = Graph.VideoWindow
MEE = Graph.MediaEventEx
End Sub
Sub List(dest as listbox, type as DirectShowGUIDMBS, types as string)
// Create an enumerator for the video capture devices
dim devenum as new DirectShowEnumMonikerMBS(type)
if devenum.Handle = 0 then
Return
end if
dim dev as DirectShowMonikerMBS = devenum.NextObject
while dev<>nil
Add dest, dev, types
dev = devenum.NextObject
wend
End Sub
Sub ResizeVideoWindow()
if vw<>Nil then
// Resize the video preview window to match owner window size
vw.SetWindowPosition canvas1.Left, canvas1.top, canvas1.Width, canvas1.Height
end if
End Sub
Sub SetupVideoWindow()
// Set the video window to be a child of the main window
vw.Owner = self
// Set video window style
vw.WindowStyle = BitwiseOr(vw.WS_CHILD, vw.WS_CLIPCHILDREN)
// Use helper function to position video window in client rect
// of main application window
ResizeVideoWindow
// Make the video window visible, now that it is properly positioned
vw.Visible = true
End Sub
Property AudioInput As DirectShowBaseFilterMBS
Property Capture As DirectShowCaptureGraphBuilderMBS
Property Graph As DirectShowGraphBuilderMBS
Property MC As DirectShowMediaControlMBS
Property MEE As DirectShowMediaEventExMBS
Property VW As DirectShowVideoWindowMBS
Property VideoInput As DirectShowBaseFilterMBS
End Class
MenuBar MenuBar1
MenuItem FileMenu = "File"
MenuItem AblageRecord = "Record..."
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "Edit"
MenuItem EditUndo = "&Rückgängig"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "&Ausschneiden"
MenuItem EditCopy = "&Kopieren"
MenuItem EditPaste = "&Einfügen"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "&Alles auswählen"
End MenuBar
FileTypes1
Filetype video/avi
End FileTypes1
End Project
See also:
The items on this page are in the following plugins: MBS Win Plugin.