2
votes
0answers
242 views

No permission to access webcam on linux

I am using a raspberry pi with raspbian to capture webcam shots and upload them to a web server. However, when I rebooted just now I no longer have access to the webcam. I have no idea why this ...
2
votes
1answer
123 views

V4L2 and ALSA: Kernel SPI or User API?

I'm trying to understand what Video for linux and ALSA are (exactly), and I can't discern whether they're APIs for Linux application to use (the userspace) or if they are backend services that are ...
0
votes
1answer
403 views

Devices renamed with udev not working, original device node still there

I'm trying to rename certain video devices using udev. Here's a rule (broken down for readability): ACTION=="add", SUBSYSTEM=="usb", ATTR{busnum}=="1", ATTR{devpath}=="2", ATTR{idVendor}=="05e1", ...
0
votes
2answers
63 views

Camera's in Linux switch filename on boot

I've got a few camera's for use in Zoneminder. But they tend to switch places upon boot. One tiem camera a will get /dev/video0, the other time it will be /dev/video1. Is there a way to set these ...
2
votes
1answer
590 views

Linux (v4l) webcam - make settings “stick”

My Logitech camera (C300) is properly detected and present at /dev/video0. However, by default the image has contrast and saturation set to maximum, which significantly degrades the image quality. I ...
1
vote
1answer
515 views

Why can’t two programs access my webcam simultaneously?

I first launch cheese and my webcam turns on. I then run vlc to grab the output of /dev/video0 but it fails with: [0x7f3ea40012e8] v4l2 demux error: cannot set input 0: Device or resource busy ...
0
votes
1answer
378 views

v4l - capture and watch at the same time

Capturing v4l and line-in audio using mencoder works very well, but I would like to record real-time game play video from consoles plugged into the video card. I've used xawtv for this (Works quite ...
3
votes
0answers
876 views

Webcam resolution, vlc and Linux

I'm trying to do some some streaming with a webcam, but so far the results are not good: everything I stream in 320x240 looks good, but as soon as I choose a higher resolution, the image quality gets ...
0
votes
0answers
289 views

A way to stream from a v4l2 device?

I have a Arch Linux server and I'm currently using the mjpeg format to stream a security camera. The problem is that mjpeg is a bad format in terms of compression. It compress frames individually so ...
0
votes
1answer
155 views

VideoLAN device addressing in VLC

How do I get the VideoLAN device information that corresponds with /dev/video, and /dev/video1 for vlc targetting? This command kind of does what I want: vlc v4l2:// -vvv input_stream ...