dv4l software package provides Redirect V4L API to access a camcorder from a V4L program, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dv4l
dv4l is installed in your system.
Make ensure the dv4l package were installed using the commands given below,
$ sudo dpkg-query -l | grep dv4l *
You will get with dv4l package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Graphics |
| Package | dv4l |
| Version | 1.0-5+b1 [armhf], 1.0-5 [amd64 |
| Description | Redirect V4L API to access a camcorder from a V4L program |
| Sub Section | Graphics |
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