webcam

How to access webcam with Javascript [duplicate]

妖精的绣舞 提交于 2019-12-04 04:29:02
This question already has an answer here : Closed 6 years ago . Access webcam without Flash (1 answer) I google'd quite a while about this topic, without any satisfying result. Actually my basic question is: Is there any possible way to access a webcam with Javascript ? Maybe with HTML5 ? <video> element ? What are options as developer to access the computers webcam anyway? Mikko Ohtamaa Please see this answer: Access webcam without Flash It is possible with beta browsers but if you want to developer something for IE users you need to stick with Flash. 来源: https://stackoverflow.com/questions

libv4l2: error turning on stream: No space left on device

左心房为你撑大大i 提交于 2019-12-04 03:23:37
I try to get stereo pair for opencv. I connect Logitech B910 and Logitech C910 webcams to usb. But have this error. I played with quirks parametrs and set outfmt=mjpeg in mplayer, but have this error again. Where can I find bug in uvcvideo or usb drivers? What monitoring or debuging tools I should use? This is a badly worded error message ; the cause is not having enough USB bandwidth on the controller. As you have guessed, if you could just get your cameras to use MJEPG your problem will be resolved. OpenCV might be using FFMPEG to do the acquire, ( the linux build generally has FFMPEG

OpenCV capture from USB not iSight (OSX)

南楼画角 提交于 2019-12-04 02:40:52
问题 I am having trouble accessing the external USB camera instead of the built-in iSight when using OpenCV with a MacBook Pro under Mac OSX. When passing an argument to the cvCaptureFromCAM(index) function other than 0 or -1 I will always get a Warning: Max Camera Num is 0; Using camera 0 The camera is a Sony PS3 EYE working perfectly with the macam driver and quicktime component. Yet I am unable to access it using OpenCV which will always default to the built-in iSight (even when trying to

Regarding the scope of Sample Grabber in DirectShow

夙愿已清 提交于 2019-12-04 02:30:08
问题 I have 2 related questions for my web cam live capture application. The webcams capture data in varying formats such as YUY2, RGB24, I420, MJPG etc. I need to convert the captured data to I420 irrespective of the input format. Hence I need to know the current scope/capability of the Direct Show inbuilt Transform filter such as Sample Grabber. Will the Sample Grabber support at least these many transformations? Or will I have to write my own custom filters? Many of the webcams seem to have

webcam does not work in pip version of opencv-python and opencv-contrib-python

不问归期 提交于 2019-12-04 02:15:28
问题 I've been facing a problem with the webcam in opencv in python using anaconda. The problem is the following: I cannot open the webcam if opencv is installed via any of the two: pip install opencv-python (available 3.1,3.2,3.3), or pip install opencv-contrib-python (available 3.2,3.3) However it will work if and only if I install it from conda install opencv (available opencv 3.1) However, some functionality of opencv is only given in newer versions or in the contrib version currently not

How do I record video from a webcam in MATLAB?

倖福魔咒の 提交于 2019-12-03 18:01:58
问题 I would like to know how I can record a video in MATLAB with my webcam. 回答1: NOTE: This is now updated for use with newer versions of MATLAB, since some of the older functionality has been superseded and removed. If you already know how to capture a single image from a webcam, then it should just be a matter of stitching the images together into a movie. You can use a VideoWriter object to open a movie file and then add sequential images using the writeVideo method. For example: aviObject =

Opencv cannot access my webcam

自闭症网瘾萝莉.ら 提交于 2019-12-03 18:00:18
I have trouble with accessing webcam using opencv 2.4.3. My System: Hp Probook 4530s - HP Fixed HD Webcam Ubuntu 12.10 OpenCV 2.4.3 İf I want to capture my built-in camera i get ERROR: capture is NULL I'm using http://opencv.willowgarage.com/wiki/CameraCapture sample code. Sample code is: #include "cv.h" #include "highgui.h" #include <stdio.h> // A Simple Camera Capture Framework int main() { CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY ); if ( !capture ) { fprintf( stderr, "ERROR: capture is NULL \n" ); getchar(); return -1; } // Create a window in which the captured images will be

opencv/python: Draw image over a webcam stream [duplicate]

狂风中的少年 提交于 2019-12-03 17:06:50
This question already has answers here : Closed 2 years ago . overlay a smaller image on a larger image python OpenCv (6 answers) Hey everyone I'm trying to make a game using my webcam where I need some objects to fall down the screen while Im streaming video with my webcam (that stream being my background). The question is: how do I draw the image over this background? I know how to capture each frame and that I have to draw the image over the frames, but using what? For this I am using python and opencv and the cv2 module . Ive already searched and I discovered that you can use regions of

allow deny remember flash security panel

老子叫甜甜 提交于 2019-12-03 16:52:14
Why is it that some flash sites have the option to 'allow' 'deny' and 'remember' under the privacy options for camera/mic and some flash sites have only 'allow' and 'deny' It may be buggy :) but these are two separate dialog boxes. The first image is the "privacy" panel, it has the option to remember the setting. It is specifically invoked (as shown in the link in @lazfish's comment) by calling Security.showSettings(SecurityPanel.PRIVACY); . The second dialog is a default dialog shown by Flash player when an app tries to use the camera/microphone. Edit: just to be clear... "default" is not

Record video from webcam with jquery/flash directly in browser?

三世轮回 提交于 2019-12-03 15:53:57
I want to let users record video via webcam and then upload the recorded video to the site all through the browser. Here is an example that works exactly how I want my site to work except it does not seem to capture video, just images. http://www.xarg.org/project/jquery-webcam-plugin/ Please let me know if there is a way I can customize this or if there is something else out there that I can use. I want something standalone and don't want to rely on another service to accomplish this. Thanks! edgesrazor We've been looking for the same thing, but from my research, it appears there's no way to