USB Camera Preview

1. Viewing Video Devices

ls /dev/video*

The image shows the result when two USB cameras are connected: one USB camera displays two video devices. The USB camera selects the newly added device with the smaller number, either /dev/video0 or /dev/video2.

2. GUVCView

GUVCView is an open-source software for Linux systems used to capture and record video and images, primarily for webcams.

2.1 GUVCView Installation

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sudo apt update
sudo apt install guvcview -y

2.2 GUVCView Usage

Go to the application menu bar and click the guvcview icon, or enter the launch command in the terminal: select USB camera.

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guvcview

3. VLC

VLC media player is a free and open-source multimedia player that supports various audio and video formats, as well as DVD, audio CD, VCD, and various streaming media protocols.

3.1 VLC Installation

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sudo apt update
sudo apt install vlc -y

3.2 VLC Usage

Go to the application menu and click the VLC media player icon, or enter the launch command in the terminal: select USB camera.

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vlc

Select the device number corresponding to the USB camera: