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WM_CAP_DRIVER_CONNECT Return value


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Hi everybody, I have some code for acquiring webcam image using [WM_CAP_DRIVER_CONNECT], Unfortunately [WM_CAP_DRIVER_CONNECT] return nothing.

I have been reading about [WM_CAP_DRIVER_CONNECT] on MSDN LINK, they said

Returns TRUE if successful or FALSE if the specified capture driver cannot be connected to the capture window.

So my question is, How can I get returned value from [WM_CAP_DRIVER_CONNECT].?

Any help would be greatly appreciated.

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    • By kovlad
      My solution is to write nested arrays without copying.
      The problem was described hier.
       
      Function:
      #include <Array.au3> ; #FUNCTION# ==================================================================================================================== ; Name ..........: _ArrayNestedSet ; Description ...: Assigns a value to an element of a nested 1D array. ; Syntax ........: _ArrayNestedSet(ByRef $aArray, $vIndex, $vValue) ; Parameters ....: $aArray - an array of arrays. ; $vIndex - an index or 1d-array of indexes; ; a size if $vValue not defined (zero to delete). ; $vValue - a value (create, resize or delete if not defined). ; ; Return values .: on success - 1 ; @extended - nesting level of operation ; on failure - 0 ; @extended - nesting level of error ; @error = 1 - invalid array ; @error = 2 - invalid index ; Author ........: ; Modified ......: kovlad ; Remarks .......: ; Related .......: ; Link ..........: https://www.autoitscript.com/forum/topic/185638-assign-a-value-to-an-array-in-array-element/ ; https://www.autoitscript.com/trac/autoit/ticket/3515?replyto=description ; Example .......: Yes ; =============================================================================================================================== Func _ArrayNestedSet(ByRef $aArray, $vIndex, $vValue = Default) Local $extended = @extended + 1 If IsArray($vIndex) Then If UBound($vIndex, 0) <> 1 Then _ Return SetError(2, $extended) If UBound($vIndex) > 1 Then If UBound($aArray, 0) <> 1 Then _ Return SetError(1, $extended) ; keep index for this array Local $i = $vIndex[0] If $i < 0 Or UBound($aArray) <= $i Then _ Return SetError(2, $extended) ; delete index of this array _ArrayDelete($vIndex, 0) ; recursive function call Local $return = _ArrayNestedSet($aArray[$i], $vIndex, $vValue) If @error Then Return SetError(@error, @extended + 1, 0) Else Return SetExtended(@extended + 1, 1) EndIf Else $vIndex = $vIndex[0] EndIf EndIf If $vValue = Default Then If $vIndex < 0 Then _ Return SetError(2, $extended) If $vIndex = 0 Then ; delete array and free memory $aArray = 0 Return SetExtended($extended, 1) EndIf If UBound($aArray, 0) = 1 Then ; resize array keeping data ReDim $aArray[$vIndex] Return SetExtended($extended, 1) Else ; create new nested array Local $aTmp[$vIndex] $aArray = $aTmp Return SetExtended($extended, 1) EndIf Else If UBound($aArray) <= $vIndex Then _ Return SetError(2, $extended + 1) ; set value of array entry $aArray[$vIndex] = $vValue Return SetExtended($extended, 1) EndIf EndFunc  
      Examples:
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      age=12,name=bob,hobbies="games,reading",phrase="I\'m cool!" age = 12 name = bob hobbies = games,reading  
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    • By Simpel
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    • By Stacker
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    • By astrionn
      Hi Guys,
       
      I`m trying to record with my webcam in 5s intervalls and do some stuff between starting to record and stoping.
      I took code from here: https://www.autoitscript.com/forum/topic/27925-webcam-example/
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       Is called WMS.au3 and contains all the constants for the dll calls is called rec.au3 and does all necessary dll calls to start a webcam recording to a file Is called stopcam.exe and does the dll calls to stop recording into a file WMS.au3  :
      $WM_CAP_START = 0x400 $WM_CAP_UNICODE_START = $WM_CAP_START +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 rec.au3  :
       
      #include <WMS.au3> #include <GUIConstants.au3> if not FileExists(@ScriptDir&"\vid\"&string(@MON)&"\"&string(@mday)) Then DirCreate(@ScriptDir&"\vid\"&"\"&string(@MON)&"\"&string(@mday)) EndIf $moviefile = @ScriptDir&"\vid"&"\"&string(@MON)&"\"&string(@mday)&"\test.avi" $avi = DllOpen("avicap32.dll") $user = DllOpen("user32.dll") FileWrite(@scriptdir&"\clop.clop",$user) $Main = GUICreate("Camera",350,270) $moviefile=@ScriptDir&"\test.avi" $cap = DllCall($avi, "int", "capCreateCaptureWindow", "str", "cap", "int", BitOR($WS_CHILD,$WS_VISIBLE), "int", 15, "int", 15, "int", 320, "int", 240, "hwnd", $Main, "int", 1) FileWrite(@scriptdir&"\clip.clip",$cap[0]) run(@scriptdir&"\stopcam.exe") DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_DRIVER_CONNECT, "int", 0, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_SET_SCALE, "int", 1, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_SET_OVERLAY, "int", 1, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_SET_PREVIEW, "int", 1, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_SET_PREVIEWRATE, "int", 1, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_FILE_SET_CAPTURE_FILEA, "int", 0, "str", $moviefile) DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_SEQUENCE, "int", 0, "int", 0) Stopcam.exe is the compiled version of this:
      #include "WMS.au3" #include <GUIConstants.au3> $cap = Int(FileRead(@scriptdir&"\clip.clip")) $user = int(fileread(@scriptdir&"\clop.clop")) Sleep(10000) DllCall($user, "int", "SendMessage", "hWnd", $cap, "int", $WM_CAP_STOP, "int", 0, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap, "int", $WM_CAP_END, "int", 0, "int", 0) DllCall($user, "int", "SendMessage", "hWnd", $cap, "int", $WM_CAP_DRIVER_DISCONNECT, "int", 0, "int", 0) DllClose($user) FileDelete(@scriptdir&"\clip.clip") FileDelete(@scriptdir&"\clop.clop")  
      Unfortunately this is not working as I thought it would be working.
      Does someone see what I´m doing wrong?
      It should record the webcam for about 10 seconds ( a little less) and save that to an .avi file.
      It does not stop the recording , I have to stop the process manually...
      Secondly, which confuses me more is that it creates the test.avi not in the location is specified in the script... its stored in the ScriptDir for whatever reason haha
      I hope you can help me
       
      ~HappyCoding
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