Camera

After connecting a camera, you can use the following command to view the device numbers of the available cameras:

ls /dev/video*
# /dev/video0  /dev/video1

1. CSI Camera

Avoid hot-plugging whenever possible. When connecting a CSI camera, make sure the metal contacts of the FPC cable face down.

1.1 Opening the Camera with gst-launch

After confirming the CSI camera is connected correctly, run the following commands in two separate terminal windows to open the cameras:

# Camera 0
gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080,format=(string)NV12, framerate=(fraction)30/1" ! nvvidconv ! xvimagesink sync=false

# Camera 1 (run in another terminal window)
gst-launch-1.0 nvarguscamerasrc sensor-id=1 ! "video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080,format=(string)NV12, framerate=(fraction)30/1" ! nvvidconv ! xvimagesink sync=false

Parameter description:

Parameter	Description
sensor-id	Specifies the camera's physical interface ID; use 0 and 1 for dual cameras
memory:NVMM	Uses NVIDIA GPU memory to reduce latency
width, height	Resolution, must be supported by the hardware (e.g. 1080p)
format:NV12	Pixel format, natively supported by NVIDIA encoders
framerate	Frame rate, e.g. 30/1 (30 FPS)
sync=false	Disables audio/video synchronization to reduce latency

2. USB Camera

Using Cheese

Cheese is a simple and easy-to-use camera application that supports taking photos, recording videos, and burst shooting:

sudo apt install cheese

Connect the USB camera to a USB port on the board, then open the Cheese application to use it.

Using Guvcview

Guvcview is an open-source camera tool with a graphical interface:

sudo apt install guvcview

Using nvgstcapture

You can also use nvgstcapture to open a USB camera:

# V4L2 USB camera(replace <N> with the /dev/videoN node)
sudo nvgstcapture --cap-dev-node 2   # 0,1 default to CSI cameras

For more detailed documentation, see NVIDIA Developer