我正在尝试做两件事中的一件,偏好号 1:
使用 VB.NET 和 Canon EDSDK 2.5.2 打开实时视图,并在 Windows 窗体应用程序中呈现实时输出。目前我正在尝试将其放入图片框中;但是,我肯定愿意接受建议。
第二种选择是至少打开实时取景并通过摄像机上的视频输出将其流式传输到监视器。
我真的很想完成第一个!以下是我当前的代码库,帮助!
Private Sub btnStartLiveView_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStartLiveView.Click
Dim err As Integer = EDS_ERR_OK
Dim prop As Integer = EdsEvfOutputDevice.kEdsEvfOutputDevice_PC
Dim proptype As Integer = EDSDKTypes.kEdsPropID_Evf_OutputDevice
'// Stock the property.'
Dim wkIntPtr As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(prop))
Marshal.StructureToPtr(prop, wkIntPtr, False)
'send property/command to the camera'
EdsSetPropertyData(model.getCameraObject(), proptype, 0, Marshal.SizeOf(prop), prop)
Dim stream As IntPtr
Dim outMemoryRef As IntPtr
Dim evfImage As IntPtr
err = EdsCreateMemoryStream(0, stream)
If err = EDS_ERR_OK Then
err = EdsCreateImageRef(stream, outMemoryRef) '(stream, evfImage)'
Else
Dim str As String = Hex(err)
MessageBox.Show(str)
End If
If err = EDS_ERR_OK Then
err = EdsDownloadEvfImage(model.getCameraObject(), evfImage)
Else
Dim str As String = Hex(err)
MessageBox.Show("&H" & str & "L") ' Shows &H2CL which = ERR_FILE_FORMAT_NOT_RECOGNIZED'
End If
' Get the Incidental Data of the Image'
If err = EDS_ERR_OK Then
Dim zoom As UInt32
Dim point As IntPtr
EdsGetPropertyData(outMemoryRef, kEdsPropID_Evf_ZoomPosition, 0, Marshal.SizeOf(zoom), zoom)
EdsGetPropertyData(outMemoryRef, kEdsPropID_Evf_ZoomPosition, 0, Marshal.SizeOf(point), point)
Else
'MessageBox.Show(err.ToString())'
End If
Dim buffer(Marshal.SizeOf(stream)) As Byte
Dim mStream As System.IO.Stream = New System.IO.MemoryStream(Marshal.SizeOf(stream))
Dim gcTime As GCHandle = GCHandle.Alloc(0, GCHandleType.Pinned)
Dim pTime As IntPtr = gcTime.AddrOfPinnedObject()
Marshal.Copy(stream, buffer, 0, Marshal.SizeOf(stream))
mStream.Write(buffer, 0, Marshal.SizeOf(stream))
Me.PictureBox1.Image = Image.FromStream(mStream)
EdsRelease(stream)
End Sub