USB Webcam liefert schwarzes Bild

Then · Beitrag von **Then** » 14.11.2014 17:31

Hi, habe eine Webcam am PC angeschlossen und will per Klick ein Foto machen (natürlich mit vorhergehender Vorschau) ich bekomme aber nur ein schwarzes Bild. Gibt's da evtl eine andere Möglichkeit für PB um eine WebCam zu kontrollieren ? Mein Code ist folgender :

Code: Alles auswählen

#WM_CAP_START = #WM_USER 
#WM_CAP_DRIVER_CONNECT = #WM_CAP_START + 10 
#WM_CAP_DRIVER_DISCONNECT = #WM_CAP_START + 11 
#WM_CAP_DRIVER_GET_CAPS = #WM_CAP_START + 14 
#WM_CAP_SET_PREVIEW = #WM_CAP_START + 50 
#WM_CAP_SET_PREVIEWRATE = #WM_CAP_START + 52 
#WM_CAP_STOP = #WM_CAP_START + 68 

If OpenWindow(0, 0, 0, 340, 260, #PB_Window_ScreenCentered | #PB_Window_SystemMenu, "Video capture") 
  If OpenLibrary(0, "C:\WINDOWS\system32\avicap32.dll") 
    *capAddress = IsFunction(0, "capCreateCaptureWindowA") 
    hWndC = CallFunctionFast(*capAddress, "My Capture Window", #WS_CHILD | #WS_VISIBLE, 10, 10, 320, 240, WindowID(),1) 
    SendMessage_(hWndC, #WM_CAP_DRIVER_CONNECT, 0, 0) 
    SendMessage_(hWndC, #WM_CAP_SET_PREVIEW, #True, 0) 
    SendMessage_(hWndC, #WM_CAP_SET_PREVIEWRATE, 15, 0) 
  EndIf
EndIf

Repeat
  Event = WaitWindowEvent()
Until Event = #PB_Event_CloseWindow 

SendMessage_(hWndC, #WM_CAP_STOP, 0, 0) 
SendMessage_(hWndC, #WM_CAP_DRIVER_DISCONNECT, 0, 0) 
DestroyWindow_(hWndC)
CloseLibrary(0)

End

Funktioniert nur unter PB 3.9.ö... aber nur blackScreen... ich brauche nix kompliziert großes....

funkheld · Beitrag von **funkheld** » 17.11.2014 18:05

Hmm..., ich habe bei mir etwas gefunden.

Das Bild wird in die Ablage kopiert.
Du kannst dir dann noch andere #WM reinholen in den Programmablauf.

Code: Alles auswählen

#WM_CAP_START = #WM_USER
#WM_CAP_UNICODE_START = #WM_USER +100
#WM_CAP_PAL_SAVEA = #WM_CAP_START + 81
#WM_CAP_PAL_SAVEW = #WM_CAP_UNICODE_START + 81
#WM_CAP_UNICODE_END = #WM_CAP_PAL_SAVEW
#WM_CAP_ABORT = #WM_CAP_START + 69
#WM_CAP_DLG_VIDEOCOMPRESSION = #WM_CAP_START + 46
#WM_CAP_DLG_VIDEODISPLAY = #WM_CAP_START + 43
#WM_CAP_DLG_VIDEOFORMAT = #WM_CAP_START + 41
#WM_CAP_DLG_VIDEOSOURCE = #WM_CAP_START + 42
#WM_CAP_DRIVER_CONNECT = #WM_CAP_START + 10
#WM_CAP_DRIVER_DISCONNECT = #WM_CAP_START + 11
#WM_CAP_DRIVER_GET_CAPS = #WM_CAP_START + 14
#WM_CAP_DRIVER_GET_NAMEA = #WM_CAP_START + 12
#WM_CAP_DRIVER_GET_NAMEW = #WM_CAP_UNICODE_START + 12
#WM_CAP_DRIVER_GET_VERSIONA = #WM_CAP_START + 13
#WM_CAP_DRIVER_GET_VERSIONW = #WM_CAP_UNICODE_START + 13
#WM_CAP_EDIT_COPY = #WM_CAP_START + 30
#WM_CAP_END = #WM_CAP_UNICODE_END
#WM_CAP_FILE_ALLOCATE = #WM_CAP_START + 22
#WM_CAP_FILE_GET_CAPTURE_FILEA = #WM_CAP_START + 21
#WM_CAP_FILE_GET_CAPTURE_FILEW = #WM_CAP_UNICODE_START + 21
#WM_CAP_FILE_SAVEASA = #WM_CAP_START + 23
#WM_CAP_FILE_SAVEASW = #WM_CAP_UNICODE_START + 23
#WM_CAP_FILE_SAVEDIBA = #WM_CAP_START + 25
#WM_CAP_FILE_SAVEDIBW = #WM_CAP_UNICODE_START + 25
#WM_CAP_FILE_SET_CAPTURE_FILEA = #WM_CAP_START + 20
#WM_CAP_FILE_SET_CAPTURE_FILEW = #WM_CAP_UNICODE_START + 20
#WM_CAP_FILE_SET_INFOCHUNK = #WM_CAP_START + 24
#WM_CAP_GET_AUDIOFORMAT = #WM_CAP_START + 36
#WM_CAP_GET_CAPSTREAMPTR = #WM_CAP_START + 1
#WM_CAP_GET_MCI_DEVICEA = #WM_CAP_START + 67
#WM_CAP_GET_MCI_DEVICEW = #WM_CAP_UNICODE_START + 67
#WM_CAP_GET_SEQUENCE_SETUP = #WM_CAP_START + 65
#WM_CAP_GET_STATUS = #WM_CAP_START + 54
#WM_CAP_GET_USER_DATA = #WM_CAP_START + 8
#WM_CAP_GET_VIDEOFORMAT = #WM_CAP_START + 44
#WM_CAP_GRAB_FRAME = #WM_CAP_START + 60
#WM_CAP_GRAB_FRAME_NOSTOP = #WM_CAP_START + 61
#WM_CAP_PAL_AUTOCREATE = #WM_CAP_START + 83
#WM_CAP_PAL_MANUALCREATE = #WM_CAP_START + 84
#WM_CAP_PAL_OPENA = #WM_CAP_START + 80
#WM_CAP_PAL_OPENW = #WM_CAP_UNICODE_START + 80
#WM_CAP_PAL_PASTE = #WM_CAP_START + 82
#WM_CAP_SEQUENCE = #WM_CAP_START + 62
#WM_CAP_SEQUENCE_NOFILE = #WM_CAP_START + 63
#WM_CAP_SET_AUDIOFORMAT = #WM_CAP_START + 35
#WM_CAP_SET_CALLBACK_CAPCONTROL = #WM_CAP_START + 85
#WM_CAP_SET_CALLBACK_ERRORA = #WM_CAP_START + 2
#WM_CAP_SET_CALLBACK_ERRORW = #WM_CAP_UNICODE_START + 2
#WM_CAP_SET_CALLBACK_FRAME = #WM_CAP_START + 5
#WM_CAP_SET_CALLBACK_STATUSA = #WM_CAP_START + 3
#WM_CAP_SET_CALLBACK_STATUSW = #WM_CAP_UNICODE_START + 3
#WM_CAP_SET_CALLBACK_VIDEOSTREAM = #WM_CAP_START + 6
#WM_CAP_SET_CALLBACK_WAVESTREAM = #WM_CAP_START + 7
#WM_CAP_SET_CALLBACK_YIELD = #WM_CAP_START + 4
#WM_CAP_SET_MCI_DEVICEA = #WM_CAP_START + 66
#WM_CAP_SET_MCI_DEVICEW = #WM_CAP_UNICODE_START + 66
#WM_CAP_SET_OVERLAY = #WM_CAP_START + 51
#WM_CAP_SET_PREVIEW = #WM_CAP_START + 50
#WM_CAP_SET_PREVIEWRATE = #WM_CAP_START + 52
#WM_CAP_SET_SCALE = #WM_CAP_START + 53
#WM_CAP_SET_SCROLL = #WM_CAP_START + 55
#WM_CAP_SET_SEQUENCE_SETUP = #WM_CAP_START + 64
#WM_CAP_SET_USER_DATA = #WM_CAP_START + 9
#WM_CAP_SET_VIDEOFORMAT = #WM_CAP_START + 45
#WM_CAP_SINGLE_FRAME = #WM_CAP_START + 72
#WM_CAP_SINGLE_FRAME_CLOSE = #WM_CAP_START + 71
#WM_CAP_SINGLE_FRAME_OPEN = #WM_CAP_START + 70
#WM_CAP_STOP = #WM_CAP_START + 68

InitSprite()

OpenWindow(0,0,0,800,600,"camera",#PB_Window_SystemMenu|#PB_Window_SizeGadget|#PB_Window_ScreenCentered)
OpenWindowedScreen(WindowID(0),10,10,600,450,0,0,0)

v_bild=CreateImage(#PB_Any,600,450)

OpenLibrary(0, "avicap32.dll")
*capAddress = GetFunction(0, "capCreateCaptureWindowA")
hWndC = CallFunctionFast(*capAddress, 0, #WS_CHILD | #WS_VISIBLE, 450, 10, 1,1, WindowID(0),1)
SendMessage_(hWndC, #WM_CAP_DRIVER_CONNECT, 0, 0)
SendMessage_(hWndC, #WM_CAP_SET_PREVIEW, #True, 0)
SendMessage_(hWndC, #WM_CAP_SET_PREVIEWRATE, 16, 0)

Repeat
  Event.l = WaitWindowEvent(0)
  
  SendMessage_(hWnDC, #WM_CAP_EDIT_COPY, 0 , 0)
  GetClipboardImage(v_bild)

  StartDrawing(ScreenOutput())
    DrawImage(ImageID(v_bild), 0, 0,600,450)
  StopDrawing()

  FlipBuffers()
Until Event = #PB_Event_CloseWindow

SendMessage_(hWndC, #WM_CAP_STOP, 0, 0)
SendMessage_(hWndC, #WM_CAP_DRIVER_DISCONNECT, 0, 0)
DestroyWindow_(hWndC)
CloseLibrary(0)

GRuss

PureBoard

USB Webcam liefert schwarzes Bild

USB Webcam liefert schwarzes Bild

Re: USB Webcam liefert schwarzes Bild