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Questions tagged [v4l2]

v4L2 is the second version of Video4Linux, a collection of device drivers and an API for supporting realtime video capture.

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4 votes
1 answer

Error loading bc2835-v4l2 driver, Raspberry Pi and OpenCV

disclaimer: I am new to OpenCV and Raspberry Pi, although I have a fair amount of experience with linux systems in general Here is what I am attempting to accomplish: I am trying to use a Raspberry ...
nuskita97's user avatar
1 vote
0 answers

Multiple webcams - cannot open in openCV & corrupted image

I've connected four USB webcams via well powered USB hub to RasPi2. I want to use them in openCV. So I setup a simple program, where I opened the cameras using cvCaptureFromCAM, captured a cv::Mat and ...
yaqwsx's user avatar
  • 111
1 vote
1 answer

Tiny picture using opencv2 and v4l2 driver

I'm using opencv2 and V4L2 driver on my pi and have managed to get a tiny picture out of the Raspberry Pi Camera Module with the following script: #!/usr/bin/env python import cv2 camera_port = 0 #...
reggie's user avatar
  • 1,121
1 vote
0 answers

avconv version 9.14 streaming video (using UV4L driver RaspiCam) and video (using ALSA) to ustream, no audio

I'm using avconv to read from /dev/video0 (which is attached to my RPi camera via UV4L) and also reading audio from my microphone using ALSA and stream it live on It works just fine to ...
Linus's user avatar
  • 529
3 votes
2 answers

Setting camera module to /dev/video0 to scan QR Codes using zbar

I'm trying to use the library zbar to scan qr codes using Raspberry pi's camera module. I've connected and tested the camera, but I don't know how to access that from the library because it isn't on /...
rvcam's user avatar
  • 31
38 votes
8 answers

RasPi Camera Board and Motion

I just got my Camera Board and a Model A Raspberry Pi to use as a security camera for my house. I had been using Motion with a Logitech C170 USB camera on my Model B board and it worked great except ...
11chubby11's user avatar
  • 4,812