Beta: OpenCapture

conceptgame · April 16, 2013 at 10:01 PM

Hi All,

This extension deals with capture devices (typically camera). It can display camera stream, track up to 2 colors on camera image and save frame or video stream to a file.
It is using the Opencv library that is the reason why it is a big extension but it does not need any extra Dlls.

I tested it on some hardware but I am waiting for your feeback to see if it is working properly on a larger range of devices.

The beta version (v0.5) is here: Please login to see this attachment.

Enjoy!

madmac · April 16, 2013 at 11:06 PM

This sounds like a great extension - thanks!

I've copied both files to the correct place but I still get the "Failed to load" extension error message when I run the example file??!
I am running an old build version of MMF 2 Developer on this machine. Will that make a difference?

happygreenfrog · April 16, 2013 at 11:23 PM

It could make a difference. As a matter-of-fact, I'm guessing that the object requires the latest version of MMF2. Always make sure to stay up-to-date with MMF2.

LB · April 17, 2013 at 12:01 AM

Working well here, no crashes or errors very nice work!

madmac · April 17, 2013 at 8:20 AM

Works great with latest version of MMF. Thanks again, brilliant extension

Looki · April 17, 2013 at 8:23 AM

Works fine with the Playstation Eye. Nice work! EDIT: I'm not sure if the color tracker is working properly though. When I click somewhere the + appears somewhere else, far away from where I clicked.

conceptgame · April 17, 2013 at 10:26 AM

Thank you all.

Looki: I realized yesterday that I did not fixed a bug with "Flip image (horizontal)". If it works without the flipping, it is exactly this one. You can also see if the color is correctly recognized by activating "Show Color Tracking" in the edit properties. It is an easy bug that I will correct in a version 0.6.

EDIT: I tested also without any webcam on the system and it crashed. I will investigate and correct this one also by version 0.6.

Danny · April 17, 2013 at 10:29 AM

Just out of curiosity, will this support direct screen capture if there is no device available?

I have no cam or anything here, so I selected -1 with start preview and it just bombs out MMF2 when I hit F8.

conceptgame · April 17, 2013 at 10:34 AM

It does not support direct screen capture but the crash is due to the bug I mentioned above.

Danny · April 17, 2013 at 10:37 AM

ah, no problem. Is there any chance you could implement this or would it be too much hassle?

conceptgame · April 17, 2013 at 10:56 AM

It would be a completely different extension. Why do you need this feature? In order to make demo videos as Fraps does?

XStar · April 17, 2013 at 11:19 AM

Perhaps, if you wanted to send a streaming file to multiple people at once over Lacewing, that feature could be useful. The current screen capture is a bit slow...

This could be used for screen sharing along with video chat... The only issue I've had is audio so far... XD

Danny · April 17, 2013 at 11:26 AM

Quote from conceptgame

It would be a completely different extension. Why do you need this feature? In order to make demo videos as Fraps does?

Yes, ideally. I mean, it's not an urgent extension I just think it would be rather handy, I saw an extension lately that did just that but it was aimed at WebCams, when no webcam was available it defaulted to the actual screen so you could preview and record, however it was never formally released and I'm stumped as to who actually created it.

conceptgame · April 17, 2013 at 1:28 PM

Ok I see. I am surprised that someone mixed up those two different things in one extension. If the idea is to record only the screen of a MMF2 application, it is something that I can do in a further extension. But if it should intercept the presenting events of other Direct3D applications like games (Direct3D hooking), it is out of my capabilites atm.

LB · April 17, 2013 at 2:21 PM

I agree, screen capture should not be in a camera extension like this - it should be a separate extension.

ProdigyX · April 17, 2013 at 7:36 PM

I must say, phenomenal work concept game, phenomenal work indeed!

Looki · April 17, 2013 at 11:13 PM

Please login to see this picture.

I'm afraid flipping doesn't fix the issue. I'm trying to track my lamp but the crosses appear somewhere at the egde of the screen.

conceptgame · April 18, 2013 at 6:34 AM

Where did you click on the screen? The two counters in the upper right corner should get the color from where you click. It seems to be completely black. The mfa example that I provided is also not an universal color tracker. You need to calibrate a little bit more depending on the object and the background. I also set the value range of the color from 30 to 230 in the example. The lamp on your image can be over 230 for the value of the HSV color.
I did not implement background suppression at the moment, for performance reason and I wanted also to see if the extension is stable enough without complex algorithm.

Looki · April 18, 2013 at 10:25 AM

Hm, okay. I did click in the middle though, with the left and the right mouse button.

cel · April 18, 2013 at 1:08 PM

if you're using opencv, any change of implementing some of the traking algorithms, like face, feature, object detection? and since i'm being ambitious how about some marker tracking??

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