https://github.com/mpromonet/v4l2tools

V4L2 tools using V4L2 C++ wrapper
https://github.com/mpromonet/v4l2tools

c-plus-plus v4l2 v4l2-device

Last synced: 2 months ago
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V4L2 tools using V4L2 C++ wrapper

• Host: GitHub
• URL: https://github.com/mpromonet/v4l2tools
• Owner: mpromonet
• License: unlicense
• Created: 2015-01-24T14:45:01.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2024-02-04T20:38:33.000Z (over 1 year ago)
• Last Synced: 2025-05-07T04:09:10.724Z (2 months ago)
• Topics: c-plus-plus, v4l2, v4l2-device
• Language: C
• Homepage:
• Size: 354 KB
• Stars: 123
• Watchers: 10
• Forks: 52
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • Contributing: .github/CONTRIBUTING.md
  • License: LICENSE
  • Code of conduct: .github/CODE_OF_CONDUCT.md

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v4l2tools

====================

This is simple V4L2 tools based on libv4l2cpp

Dependencies

------------

 - liblog4cpp5-dev (optional)

 - libvpx-dev      (for v4l2compress)

 - libx264-dev     (for v4l2compress)

 - libx265-dev     (for v4l2compress)

 - libjpeg-dev     (for v4l2compress)

 

Tools

-------

 - v4l2copy          : 

>	read from a V4L2 capture device and write to a V4L2 output device

 - v4l2compress  : 

>	read YUV from a V4L2 capture device, compress in VP8/VP9/H264/HEVC/JPEG format and write to a V4L2 output device    

>	read JPEG format from a V4L2 capture device, uncompress in JPEG format and write to a V4L2 output device    

 - v4l2dump          : 

>	read from a V4L2 capture device and print to output frame information (work with H264 & HEVC)

 - v4l2source_yuv :

 

>	generate YUYV frames and write to a V4L2 output device

Tools for Raspberry

-------------------

 - v4l2grab_h264     : 

>	grab raspberry pi screen, compress in H264 format using OMX and write to a V4L2 output device

 - v4l2display_h264     : 

>	read H264 from V4L2 capture device, uncompress and display using OMX

 - v4l2compress_omx : 

>	read YUV from a V4L2 capture device, compress in H264 format using OMX and write to a V4L2 output device

>   make sure the v4l2 source supports the correct pixel format. This can be configured for device 0 using `v4l2-ctl -d 0 -v width=640,height=480,pixelformat=YUYV -V`. Then check it was applied correctly using `v4l2-ctl --all`

Build

-----

     make

Install

-------

     make install

Using Docker image

===============

You can expose V4L2 devices from your host using :

        docker run --device=/dev/video0 --device=/dev/video1 -it mpromonet/v4l2tools

The container entry point is the v4l2tools application, then you can :

* get the help using :

        docker run -it mpromonet/v4l2tools -h

* run the container specifying some paramaters :

        docker run --device=/dev/video0 --device=/dev/video1 -it mpromonet/v4l2tools -fH264