v4l2-ctl

v4l2-ctl is a command-line tool used for controlling Video for Linux 2 (V4L2) devices. It allows users to interact with their video capture devices through the command-line interface.

With v4l2-ctl, users can set various parameters such as brightness, contrast, saturation, and sharpness for their cameras. They can also adjust settings like white balance, exposure, and focus. This tool provides a way to change these settings and experiment with different configurations to achieve the desired video quality.

v4l2-ctl allows users to query and display information about their video devices, such as the supported formats, supported controls, and current settings. This helps users understand the capabilities of their camera and make informed decisions about configuring it.

Additionally, v4l2-ctl can be used to capture frames or stream video from the device directly to a file or other applications. It provides options to specify the output format, resolution, and frame rate during video capture.

This tool is commonly used by developers, system administrators, and hobbyists who work with V4L2 devices. It offers a versatile and efficient way to control, configure, and capture video from supported devices via the command-line interface.

v4l2-ctl is a powerful utility that adds flexibility to working with V4L2 devices, making it easier to fine-tune video settings, gather information, and capture video streams.