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ludocus

Webcam Udf

28 posts in this topic

#1 ·  Posted (edited)

Made a udf to rysiora's webcam example,

Webcam.au3 (the udf)

#include <WindowsConstants.au3>
#include-once
$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
#include <GUIConstants.au3>
$avi = DllOpen("avicap32.dll")
$user = DllOpen("user32.dll")

;===============================================================================
;
; Description:      Open's a webcam preview screen in your gui
; Syntax:           _WebcamOpen($sHwnd, $sLeft, $sTop, $sWidth, $sHeight, $sPort=0)
; Parameter(s):     $sHwnd     - The handle of the gui
;                   $sLeft     - Left coord. of the preview screen
;                   $sTop      - Top coord. of the preview screen
;                   $sWidth    - Width of the preview screen
;                   $sHeight   - Height of the preview screen
;                   $sPort     - Specify wich webcam port you want to use (for multiple webcams)
; Requirement(s):   A webcam
; Return Value(s):  On Success - Returns id needed for other controls
;                   On Failure - Returns -1
; Author(s):        Ludocus
; Note(s):          If a black/blank screen shows up, try using different $sPort's (0 to 3)
;
;===============================================================================
Func _WebcamOpen($sHwnd, $sLeft, $sTop, $sWidth, $sHeight, $sPort=0)
    $cap = DllCall($avi, "int", "capCreateCaptureWindow", "str", "cap", "int", BitOR($WS_CHILD,$WS_VISIBLE), "int", $sLeft, "int", $sTop, "int", $sWidth, "int", $sHeight, "hwnd", $sHwnd, "int", 1)
    DllCall($user, "int", "SendMessage", "hWnd", $cap[0], "int", $WM_CAP_DRIVER_CONNECT, "int", $sPort, "int", 0)
    DllCall($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)
    if @error then return -1
    return $cap[0]
EndFunc

;===============================================================================
;
; Description:      Creates a Snapshot from a webcam
; Syntax:           _WebcamSnap($sId, $sFile)
; Parameter(s):     $sId       - Id (returned from _WebcamOpen)
;                   $sFile     - File to save the snapshot to (*.bmp)
; Requirement(s):   A webcam
; Return Value(s):  On Success - Returns 1
;                   On Failure - Returns 0
; Author(s):        Ludocus
; Note(s):          None
;
;===============================================================================
Func _WebcamSnap($sId, $sFile)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_SET_CALLBACK_FRAME, "int", 0, "int", 0)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_GRAB_FRAME_NOSTOP, "int", 0, "int", 0)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_FILE_SAVEDIBA, "int", 0, "str", $sFile)
    if @error Then
        return 0
    Else
        return 1
    EndIf
EndFunc

;===============================================================================
;
; Description:      Closes the preview screen created with _WebcamOpen
; Syntax:           _WebcamClose($sId)
; Parameter(s):     $sId       - Id (returned from _WebcamOpen)
; Requirement(s):   A webcam
; Return Value(s):  On Success - Returns 1
;                   On Failure - Returns 0
; Author(s):        Ludocus
; Note(s):          None
;
;===============================================================================
Func _WebcamClose($sId)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_END, "int", 0, "int", 0)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_DRIVER_DISCONNECT, "int", 0, "int", 0)
    DllClose($user)
    if @error Then
        return 0
    Else
        return 1
    EndIf
EndFunc

;===============================================================================
;
; Description:      Starts recording the webcam to a file
; Syntax:           _WebcamRecordStart($sFile, $sId)
; Parameter(s):     $sId       - Id (returned from _WebcamOpen)
;                   $sFile     - File to save the movie to (*.avi)
; Requirement(s):   A webcam
; Return Value(s):  On Success - Returns 1
;                   On Failure - Returns 0
; Author(s):        Ludocus
; Note(s):          Stop recording by: _WebcamRecordStop($Id)
;
;===============================================================================
Func _WebcamRecordStart($sFile, $sId)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_FILE_SET_CAPTURE_FILEA, "int", 0, "str", $sFile)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_SEQUENCE, "int", 0, "int", 0)
    if @error Then
        return 0
    Else
        return 1
    EndIf
EndFunc

;===============================================================================
;
; Description:      Stops recording.
; Syntax:           _WebcamRecordStop($sId)
; Parameter(s):     $sId       - Id (returned from _WebcamOpen)
; Requirement(s):   A webcam
; Return Value(s):  On Success - Returns 1
;                   On Failure - Returns 0
; Author(s):        Ludocus
; Note(s):          None
;
;===============================================================================
Func _WebcamRecordStop($sId)
    DllCall($user, "int", "SendMessage", "hWnd", $sId, "int", $WM_CAP_STOP, "int", 0, "int", 0)
    if @error Then
        return 0
    Else
        return 1
    EndIf
EndFunc

thnx to rysiora with his great example!

Edited by ludocus
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Please Comment :)

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#4 ·  Posted (edited)

why do you say: 'and better'?

Mine has a better discription + _WebcamRecordStart + _WebcamRecordStop + His udf has an error, Mine works with an Id Returned, His doesn't wich explains the error

?? I don't get the clue, what is worse about mine?

Edited by ludocus

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#6 ·  Posted (edited)

could you be a little more clear?

If there are some things wrong, then I would like to try to make them better. :) thnx

Edited by ludocus
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Looks good, I may actually use it to make a log of everyone that uses my computer :).

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Look in the original topic of how to use the webcam, and check for my post. It shows how to call the webcam, only without using the GUI that comes with it.

Also, try to thank the original author inside the code as well. Someone may find your code in a location other then this, and he would think you made it completely, because that is what you state.

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Nice job man thanks!

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Hi.

I've a compil error on $WS_CHILD.

I need to add : '#include <WindowsConstants.au3>' to fix it.

Now, it run perfectly. muttley

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#11 ·  Posted (edited)

Any idea why I get unpredictable recording lengths. What's the best practice to record for a speficied length of time?

Edited by spudw2k

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Hi,

It didn't work with my webcam. I don't know what brand is it. The screen does not show up. Compilation was OK.

Could you please provide a program example?

Regards

Jose

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#13 ·  Posted (edited)

Example:

#include <GUIConstants.au3>

#include <Webcam.au3>

$gui = GUICreate("Test",322,242)

$camera = _WebcamOpen($gui,1,1,320,240)

GUISetState(@SW_SHOW)

While 1

$msg = GUIGetMsg()

If $msg = $GUI_EVENT_CLOSE Then

_WebcamClose($camera)

Exit

EndIf

Sleep(100)

WEnd

ludocus, you can refine the UDF, to be able to specify what parameters to run the camera? (I like the program, which goes along with the driver is given resolution, and frame rate.) And in the UDF is run with default settings?

Edited by ynbIpb

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May I know is it possible to adjust the quality settings of webcam (eg. brightness, contrast, gamma, etc) and is there any way of reading back the different settings from the current webcam before I set it?

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#15 ·  Posted (edited)

thank you it's a verygood UDF .

but when i have 3 webcam how can i change between them?

Edited by elawady

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up

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I'm sorry for not replying.

I haven't been online on these forums for about a year.

But, no.. I'm wondering how to do that myself.

I've got no clue on how to choose between more than 1 webcam.

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can you please tell me how to choose 1 (out of 1) camera because to me it's showing only black?

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This UDF doesn't work on any OS above XP (meaning Vista/7/and probably 8).


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
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I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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This UDF doesn't work on any OS above XP (meaning Vista/7/and probably 8).

This is true, but if you use the dll avicap32.dll from XP, as I use, works normally!

Shows us that the dll of Windows 7 has some problem.

JS


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