v4l ("Video For Linux") is a video capture infrastructure provided by the linux kernel. the historic "v4l" has been obsoleted by the "v4l2" ("Video for Linux 2") infastructure and has been removed from the linux-kernel starting with 2.6.38.
Questions tagged [v4l]
52 questions
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where can I find video4linux2 device /dev/video in ubuntu 9.04
where can I find video4linux2 device /dev/video in ubuntu 9.04.
ADDED.
I want to work with Hardware Overlays. I want to make a video player which play video on one overlay and draw controls on other overlay. For that I want to use video4linux.
SunnyShah
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GStreamer, streaming and taking a shot at the same time
Does GStreamer (Linux) support streaming and taking a shot in a different resolution at the same time?
I need to stream a V4L device at 720p using h264. Everything is workings so far. Now I want to take a single shot (jpeg/png) from time to time at…
Friedrich
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how to write v4L capturing program for usb web cam (640x480)
i installed the usb webcam driver in linux 2.6 version
then i want to capture using V4L please any one reply me how can i write the program to capture using webcam
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javac compiler issue with external jar using v4l4j
I am attempting to compile a program in java on my Raspberry Pi, but I cannot seam to get the javac (or java) program to link an external library specifically the v4l4j library. I can compile and execute a simple java program, no problem, but now I…
Matthew
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v4lvj drawing lines on top of webcam image
I am following a tutorial on the v4lvj library that allows access to webcams on a linux. link to source I wrote the example program that basically displays the video feed of your webcamera. Everything works just as the program described. The problem…
Matthew
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ioport.h errors when compiling v4l2 program
I wanted to follow this article about v4l2's driver writing.
But my first basic try failed when I include media/v4l2-dev.h (because I want to access some macro like VFL_TYPE_GRABBER).
media/v4l2-dev.h includes linux/device.h which includes…
roro
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OpenCV issue camera when writing video
I'm trying to write a video with my laptop camera using OpenCV but I get the following error:
VIDEOIO ERROR: V4L/V4L2: VIDIOC_S_CROP
VIDEOIO ERROR: V4L2: getting property #5 is not supported
OpenCV Error: Unsupported format or combination of formats…
tul1
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