Comments on: ImageSnap: Capturing a Video Image with QTKit on Snow Leopard http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/ Think Harder, not smarter Thu, 02 Feb 2012 03:09:47 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Robert Harder http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-26215 Robert Harder Fri, 29 Apr 2011 14:31:29 +0000 http://blog.iharder.net/?p=230#comment-26215 @James I should be able to add a warmup delay. Will see what I can do... @James I should be able to add a warmup delay. Will see what I can do…

]]> By: James Seigel http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-25981 James Seigel Thu, 28 Apr 2011 03:09:23 +0000 http://blog.iharder.net/?p=230#comment-25981 Thanks for keeping up your responses to this lovely piece of code. I had a question about where I should/could put a delay in to give my camera more of a chance to auto adjust for brightness. On my old machine it seemed to take great pictures, now when it is too bright out it it just a white canvas. The laptop it is on now is significantly faster. g4 -> 2.3 intel dual core The camera is a usb Microsoft Lifecam HD-6000 Any help would be awesome! Cheers James. Thanks for keeping up your responses to this lovely piece of code. I had a question about where I should/could put a delay in to give my camera more of a chance to auto adjust for brightness. On my old machine it seemed to take great pictures, now when it is too bright out it it just a white canvas. The laptop it is on now is significantly faster.

g4 -> 2.3 intel dual core

The camera is a usb Microsoft Lifecam HD-6000

Any help would be awesome!

Cheers
James.

]]> By: Robert Harder http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-17509 Robert Harder Tue, 15 Mar 2011 06:36:35 +0000 http://blog.iharder.net/?p=230#comment-17509 @James That's pretty weird. I can't duplicate it. The window server error reminds me of errors I used to get trying to run X11 apps on a headless Solaris box -- their was a mismatch between the windowing environment that was present (or not present) and what the app expected. I'm just not sure. @James That’s pretty weird. I can’t duplicate it. The window server error reminds me of errors I used to get trying to run X11 apps on a headless Solaris box — their was a mismatch between the windowing environment that was present (or not present) and what the app expected. I’m just not sure.

]]> By: James http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-17475 James Tue, 15 Mar 2011 02:50:31 +0000 http://blog.iharder.net/?p=230#comment-17475 I too am seeing the green snapshot on some machines - although most iMacs work. I have not found a pattern to it except every machine showing the error below. (Snow Leopard 10.6.6) svr:~ root# ssh admin@192.168.2.139 imagesnap /tmp/snap.jpg Tue Mar 15 13:32:14 iMac.local imagesnap[721] : kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged. _RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL. Capturing image from device "Built-in iSight".../tmp/snap.jpg svr:~ root# I too am seeing the green snapshot on some machines – although most iMacs work. I have not found a pattern to it except every machine showing the error below. (Snow Leopard 10.6.6)

svr:~ root# ssh admin@192.168.2.139 imagesnap /tmp/snap.jpg
Tue Mar 15 13:32:14 iMac.local imagesnap[721] : kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
_RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL.
Capturing image from device “Built-in iSight”…/tmp/snap.jpg
svr:~ root#

]]> By: Robert Harder http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-5260 Robert Harder Wed, 30 Jun 2010 18:51:05 +0000 http://blog.iharder.net/?p=230#comment-5260 @Syl That does seem strange. Nothing comes to mind that mind account for it. -Rob @Syl That does seem strange. Nothing comes to mind that mind account for it. -Rob

]]> By: Syl http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-5245 Syl Mon, 28 Jun 2010 02:05:02 +0000 http://blog.iharder.net/?p=230#comment-5245 I'm having a strange issue with ImageSnap. When executing it over ssh, it will work the first one or two times, but thereafter the saved image consists solely of uniform green pixels. The light on the iSight does blink, so it does seem to be accessing the camera. I’m having a strange issue with ImageSnap. When executing it over ssh, it will work the first one or two times, but thereafter the saved image consists solely of uniform green pixels. The light on the iSight does blink, so it does seem to be accessing the camera.

]]> By: Robert Harder http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-3983 Robert Harder Thu, 04 Mar 2010 17:04:27 +0000 http://blog.iharder.net/?p=230#comment-3983 OK, the ImageSnap home page now links to v0.2.4 (no longer beta). Hope it works for everyone! -Rob http://iharder.sourceforge.net/current/macosx/imagesnap/ OK, the ImageSnap home page now links to v0.2.4 (no longer beta). Hope it works for everyone! -Rob

http://iharder.sourceforge.net/current/macosx/imagesnap/

]]> By: JBL http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-3965 JBL Wed, 03 Mar 2010 21:53:54 +0000 http://blog.iharder.net/?p=230#comment-3965 Just letting you know that the Beta 0.2.4 did work on 10.5.8. Just letting you know that the Beta 0.2.4 did work on 10.5.8.

]]> By: Robert Harder http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-3889 Robert Harder Mon, 01 Mar 2010 17:33:10 +0000 http://blog.iharder.net/?p=230#comment-3889 Need some beta testers to try out the version with NSApplicationLoad(). It doesn't crash 10.6 (as the sharedApplication call did), but I don't have 10.5 to test on, so I need some help. Thanks. http://dl.dropbox.com/u/4303707/ImageSnap-v0.2.4beta.tgz -Rob Need some beta testers to try out the version with NSApplicationLoad(). It doesn’t crash 10.6 (as the sharedApplication call did), but I don’t have 10.5 to test on, so I need some help. Thanks.

http://dl.dropbox.com/u/4303707/ImageSnap-v0.2.4beta.tgz

-Rob

]]> By: KD http://blog.iharder.net/2009/09/14/imagesnap-capturing-a-video-image-with-qtkit-on-snow-leopard/#comment-3886 KD Mon, 01 Mar 2010 01:36:33 +0000 http://blog.iharder.net/?p=230#comment-3886 In order to prevent this "CGSWindow" thing, you need to call NSApplicationLoad() in main(). In order to prevent this “CGSWindow” thing, you need to call NSApplicationLoad() in main().

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