I'm trying to stream a video generated with OpenCV (using the webcam and doing some image processing). To enhance the challenge, we've decided to use OpenWebRTC. The OpenWebRTC examples are amazing, but they all use the webcam (I know, this is how webrtc is intended, to use the webcam), but we want to send Mat objects inside a while loop (very OpenCV style).
By chance, has anyone accomplished this or has any idea?
Thanks in advance,
—N
Related
So I was using OpenCV to capture from my webcam, although I have hit a problem. Seems OpenCV has no way of detecting if the camera has been disconnected. So I was wondering if anyone knows any other webcam APIs for c++ that could be used as an alternative, or if anyone knows how to detect disconnected/reconnected webcams using OpenCV I could even continue using that.
I am looking for a stabilization technique/algorithm that works with a set of sequential images, but not a video (each image arrives every 1.2s aprox). OpenCV seems to have this stabilization but over video (stabilizer), are there any other classes that I can use to stabilize this set of images? Or, is there a way to make it work with this class?
Cheers and thanks!
I would like to know how OpenCV does to find devices that it can read from?
Can OpenCV only read from usb devices?
I have a video acquisition card (BlackMagic Intensity) and I until now used the blackMagic's SDK to retrieve the stream coming from the input port on the card, and converted it to a cv::Mat that I then use in my code.
But can't I not develop some kind of C++ plugin for OpenCV so that I can use VideoCapture to access my blackMagic stream? wouldn't it be a cleaner way of doing this?
Hope you can help
I am using OpenCV 2.4 with C++ for image processing and video streaming . I would like to know how we can use fire-wire camera like pixilink to capture frames? I tried the VideoCapture class but it seems to work with only usb cameras unlike firewire one. If some one has done same thing with firewire camera then kindly give some guidance how to do that?
You can capture images using firewire SDK or you can also libdc1394 API. I found libdc1394 to more reliable and easy to use and there are couple of examples available to get start.
I need you to recommend me a library for c++ to use with visual c++ 2008 to perform an edition ef the frames from a video source before been rendered on the screen. I dont want to perform effects like blur or things like that, I want to change the size en some cases and other stuff.
I have tried with phonon (where I cant access the frames) and opencv (where I can get the frames but I cant display the audio because the library is for other purpose), I have been reading about directshow on windows but I still dont know if I can recover the frame.
Regards, Marco.
Try ffmpeg. It's what OpenCV uses to read frames.
FFMPEG includes a simple player -- ffplay. Have a look at its source for an idea of how to use the library.
As misha said FFMPEG is THE library for videoacquisition. As you use C++, you can try the simpler to use FOBS, which is a C++ encapsulation of FFMPEG. You can look at the sources if you want to do your own C++ wrap around FFMPEG.
my2c