video-capture

I am on mac and used brew to install opencv3. I was having opencv3/3.0.0 . Today, I updated it and got version 3.1.0_1. However, this update is breaking everything and when I try to use VideoCapture to read frames and use waitKey function it breaks by causing following: 2016-02-26 23:25:16.846 tracking[99869:1026824] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CaptureDelegate doFireTimer:]: unrecognized selector sent to instance 0x7fab5a601240' So, now I am trying to switch back to the following version, but I am not sure how. I used following: brew

We need to capture live video and display easily on Linux. We need a cheap card or USB device with a simple API. Anyone want to share some experience? Use the video4linux library. I've used it with a c++ program and was able to capture webcam frames within about an hour. (Very easy to use and setup) If you need to program, you're best off using GStreamer , a multimedia framework under Linux. Cheese, mentioned by jackbravo, is based on GStreamer, as is Flumotion , a streaming server I work on. Shannon Nelson As mentioned, Use dvgrab to capture from a Firewire interface from the camera, then use

I tried playing a video from a file, as given in the tutorials. My program was as follows: import numpy as np import cv2 cap = cv2.VideoCapture('output.avi') while(cap.isOpened()): ret, frame = cap.read() frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) cv2.imshow('outVideo',frame) if cv2.waitKey(1) & 0xFF == ord('q'): break cap.release() cv2.destroyAllWindows() But I got the following error: Traceback (most recent call last): File "playVideo.py", line 8, in <module> frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) cv2.error: /home/hp/opencv/modules/imgproc/src/color.cpp:7456: error: (-215) scn

I'm a .Net C# Developer. I want to develop the media programming about video/audio codec, capture media from source, etc. I'm going to use the DirectShow Lib, but I read it on MSDN, and I'm very confused, because I'm a beginner. Do you have the best tutorials or some article that can make beginner understand to program in the DirectShow architecture? If so, please share them. You will find these useful: http://www.codeproject.com/KB/directx/PrgmngDirectShowappsCS.aspx http://www.codeproject.com/KB/directx/directshowmediaplayer.aspx http://www.codeproject.com/KB/directx/directshownet.aspx http:

I have a requirement of recording video via web cam, on my webpage. What are the available plugins for the same. My website is developed using Ruby on Rails framework Regards, Pankaj If an HTML5 solution could be suitable for you, you can take a look to WebRTC (currently supported in Chrome, Firefox and Opera). You can find a good tutorial here: http://www.html5rocks.com/en/tutorials/getusermedia/intro/ The first hit on searching "webcam plugin": http://www.xarg.org/project/jquery-webcam-plugin/ As it is using JavaScript it is easy to include in Rails. Many others appear in the results ...

I have code for capturing a video clip on Android: Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); intent.putExtra("android.intent.extra.durationLimit", 30000); intent.putExtra("EXTRA_VIDEO_QUALITY", 0); startActivityForResult(intent, ActivityRequests.REQUEST_TAKE_VIDEO); This code works well on API 2.2, but the duration limit does not work on API 2.1 (Galaxy S). Is there some constant or parameter for setting this time, or is there a better approach than the one I am taking? I ask because I found another application that works on the Galaxy S (called Vibrant ) which can record

I need to take video from my application using only front camera. I am using intent to perform this action. Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT, videoUri); intent.putExtra("android.intent.extra.durationLimit", 30); intent.putExtra("android.intent.extras.CAMERA_FACING", 1); //to open front facing camera startActivityForResult(intent, VIDEO_CAPTURE); When I run the application, I am able to take video using front camera. But suppose when I click my record video button and the camera view is opened. In that user go and change the