Programming Forums > Application Development > Other Programming Languages

davil · Dec 5th, 2007, 5:29 AM

Anyone know of any useful apps to capture screen to compressed JPG (compression can be set)

I have tried this code in Autoit:

 autoit Syntax (Toggle Plain Text) 
; Capture full screen
; Fist parameter - filename, last - jpeg quality. 
DllCall("captdll.dll", "int", "CaptureScreen", "str", "dump_full.jpg", "int", 85)
; Capture given region
; Fist parameter - filename, next four: left, top, width, height. Last one - jpeg quality.
; Set quality to any negative number to capture into BMP
DllCall("captdll.dll", "int", "CaptureRegion", "str", "dump_partial.bmp", "int", 100, "int", 100, "int", 300, "int", 200, "int", -1)
; Capture full screen
; Fist parameter - filename, last - jpeg quality. 
DllCall("captdll.dll", "int", "CaptureScreen", "str", "dump_full.jpg", "int", 85)
; Capture given region
; Fist parameter - filename, next four: left, top, width, height. Last one - jpeg quality.
; Set quality to any negative number to capture into BMP
DllCall("captdll.dll", "int", "CaptureRegion", "str", "dump_partial.bmp", "int", 100, "int", 100, "int", 300, "int", 200, "int", -1)

and it does save the JPG but gives up an error like this:
AutoIT has detected the stack has become corrupt.
Obviously some sort of problem with the DLL

but if there's code for this in C or C++ or BASIC or anything that anyone has, I'll take it.... This application would be extremely useful for our I.T. Department.

Any help is much appreciated. Thanks for reading

Salem · Dec 6th, 2007, 10:02 AM

Stack corruption can be caused by getting the calling convention wrong.
http://www.hiddensoft.com/autoit3/do...ns/DllCall.htm

Perhaps
DllCall("captdll.dll", "int:cdecl", "CaptureScreen" ....

davil · Dec 6th, 2007, 10:04 AM

Thanks. that works perfectly now.

Dec 5th, 2007, 5:29 AM	#1
davil Newbie Join Date: Nov 2007 Posts: 27 Rep Power: 0	Command line screen capture Anyone know of any useful apps to capture screen to compressed JPG (compression can be set) I have tried this code in Autoit: autoit Syntax (Toggle Plain Text) ; Capture full screen ; Fist parameter - filename, last - jpeg quality. DllCall("captdll.dll", "int", "CaptureScreen", "str", "dump_full.jpg", "int", 85) ; Capture given region ; Fist parameter - filename, next four: left, top, width, height. Last one - jpeg quality. ; Set quality to any negative number to capture into BMP DllCall("captdll.dll", "int", "CaptureRegion", "str", "dump_partial.bmp", "int", 100, "int", 100, "int", 300, "int", 200, "int", -1) ; Capture full screen ; Fist parameter - filename, last - jpeg quality. DllCall("captdll.dll", "int", "CaptureScreen", "str", "dump_full.jpg", "int", 85) ; Capture given region ; Fist parameter - filename, next four: left, top, width, height. Last one - jpeg quality. ; Set quality to any negative number to capture into BMP DllCall("captdll.dll", "int", "CaptureRegion", "str", "dump_partial.bmp", "int", 100, "int", 100, "int", 300, "int", 200, "int", -1) and it does save the JPG but gives up an error like this: AutoIT has detected the stack has become corrupt. Obviously some sort of problem with the DLL but if there's code for this in C or C++ or BASIC or anything that anyone has, I'll take it.... This application would be extremely useful for our I.T. Department. Any help is much appreciated. Thanks for reading

Dec 6th, 2007, 10:02 AM	#2
Salem Programmer Join Date: Nov 2007 Posts: 33 Rep Power: 0	Re: Command line screen capture Stack corruption can be caused by getting the calling convention wrong. http://www.hiddensoft.com/autoit3/do...ns/DllCall.htm Perhaps `DllCall("captdll.dll", "int:cdecl", "CaptureScreen" ....` __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

Dec 6th, 2007, 10:04 AM	#3
davil Newbie Join Date: Nov 2007 Posts: 27 Rep Power: 0	Re: Command line screen capture Thanks. that works perfectly now.

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Programming Forums > Application Development > Other Programming Languages

Command line screen capture