Darknet: capture doenst work on windows 10

[rezkimm]

why i cannot capture with my web cam, im using opencv 3.2,3.3.0,3.3.1,3.4.0 but it also doesnt work.

[Aki1987]

Me too. It can work well with video file, images. Only camera is interupt and not working.
I dont know why?

[AlexeyAB]

@rezkimm @Aki1987

• Do you use this repository?

• Do you use this command?
  darknet.exe detector demo data/coco.data cfg/yolov3.cfg yolov3.weights -c 0

• Can your web-cam work with any other your OpenCV application?

• I just tried to use SJCAM 4000 in Web-Cam-mode with OpenCV 3.4.0, and I can successfully use it using this command: darknet.exe detector demo data/coco.data cfg/yolov3.cfg yolov3.weights -c 0

[rezkimm]

yup i use that command, but the camera is not responding, but im using opencv videocapture is work, its only doesnt work using cvcapture command

[AlexeyAB]

@rezkimm Probably you use you original repo.

yup i use that command, but the camera is not responding, but im using opencv videocapture is work, its only doesnt work using cvcapture command

This repo uses cv::VideoCapture instead of cvcapture, so it should work: https://github.com/AlexeyAB/darknet/blob/726cebd3fb67d65ec6d2d49fa6bfba4c053085df/src/http_stream.cpp#L199-L228

[rezkimm]

im using your repo
but the camera is stop working

[Aki1987]

@rezkimm Same with me. When I debug, It has a mistake in reading function cap.opened(). That means openCV has problem here. But it already solved when I add opencv 2.4.13. I think we have some problem in installing opencv. I am trying to install opencv with CMake.

[mhgwilliams]

@Aki1987
I'm experiencing this exact same issue. No problems with other uses of opencv 3.4.0.12.
Did you find a solution or did you stick with opencv 2.4.13?

Edit: Working with opencv 2.4.13 also solved my instance of this issue.

[Aki1987]

@mhgwilliams I have done my best but it still is not solved. However I check IP Cam, unbelievably it works well. I just think our fault because of camera?

[AlexeyAB]

@Aki1987 @mhgwilliams @rezkimm
Try to update your code from github.
I fixed issue with Web-cam in some last commits.

[Aki1987]

Thank you your great work @AlexeyAB . This problem has already solved.

[AweSwan]

Still broken (web cam causes crash)
I downloaded latest version, recompiled.

It does work every 1 in 15 times I try to run it, so I think it might be a rare memory leak ?
I am using a HD camera 1920x1080, so might be using more memory. Is there anyway to launch the camera at lower res, say 480p ?

My camera works fine when I run it through the windows camera app.

Using darknet on a video file seems to work well.

[AweSwan]

Hi,
Installed the latest nvidia drivers and it's working every time now. Could be that the memory has just moved around, but I am hoping the crash was due to drivers. Also would love to be able to set the cam at lower res.
Cheers

[AlexeyAB]

@AweSwan Hi,

Un-comment these 2 lines and set required resolution: https://github.com/AlexeyAB/darknet/blob/c2c8595b083ec3586a99bb913b8a986e81e3a42a/src/http_stream.cpp#L203-L204

But OpenCV has a bug, so probably it can set lower resolution than you set.