Webcam & createfile
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From: john.puzzled on 14 Aug 2005 15:17 Hi, I would like to access my webcam directly using CreateFile(). I have a Intel Webcam connected directly to one of my USB 1.1 ports on my computer. I have tried to enumerate all the USB devices on my computer using the SetupDiXXX functions but it has not worked very well for me. I also used QueryDosDevice() to find the USB camera. I found the camera and tried to open it using CreateFile() but it always failed (not found). Is this possible to do in an application with a web cam that has drivers installed? Does anyone have a fully working example (V)C++ function that 1. Finds a web cam connected to the USB 2. Opens a file handle to the web cam found Thanks!
From: The March Hare [MVP] on 14 Aug 2005 17:53 On 14 Aug 2005 12:17:09 -0700, john.puzzled(a)gmail.com wrote: > Does anyone have a fully working example (V)C++ function that > > 1. Finds a web cam connected to the USB > 2. Opens a file handle to the web cam found I'm not aware of how to do this the way you have suggested. However, I can recommend the use of DirectShow. Search for DirectShow on MSDN (now part of the Platform SDK). The AMCap sample that is included in the SDK shows how to capture from supported cameras including web cams. You can also check out my site for links to useful dshow sites.
From: The March Hare [MVP] on 14 Aug 2005 21:20 On Sun, 14 Aug 2005 15:53:46 -0600, The March Hare [MVP] wrote: > You can also > check out my site for links to useful dshow sites. Forgot that this ng doesn't have my dshow sig. The site is: http://tmhare.mvps.org
From: john.puzzled on 14 Aug 2005 23:44 Hi, I was hoping to access the USB webcam directly without having to go through DirectX....
From: The March Hare [MVP] on 15 Aug 2005 00:03
On 14 Aug 2005 20:44:54 -0700, john.puzzled(a)gmail.com wrote: > I was hoping to access the USB webcam directly without having to go > through DirectX.... I suppose it may be possible to get the raw data but there is a lot of functionality built into dshow that you would be missing. |