How To Use the Raspberry Pi Cameras with Bullseye – Guide
The new Raspberry Pi OS is based on Debian 11 (Bullseye), and the traditional raspistill and raspicam camera the commands have been replaced by a new set of open source tools designed to get the most out of all official Raspberry Pi cameras. Libcamera is a Linux, Android, and ChromeOS support library that was first provided to the Raspberry Pi through an earlier Raspberry Pi OS, but gained popularity as a result of the enhancements made to Bullseye. The program provides a set of easy-to-use tools to adjust a variety of camera settings (aperture, color balance, and exposure) via a sequence of switches that are activated when the command is delivered. We use a Raspberry Pi 4 4GB running Bullseye to guide you through some of the most frequent commands, switches and a unique way to stream live video over a network using your Raspberry Pi.
Connecting and configuring the Camera
we cover how to connect and configure the camera in that tutorial. follow the tutorial of the configuration up a Raspberry Pi Camera section up a, and including step 6.
Taking pictures
The first step in any coding project is “Hello World”, and libcamera comes with its own in the form of libcamera-hello. We will use this command to ensure that our camera it’s working.
- Open a terminal and enter the command to start the camera. A preview window will appear for five seconds before closing. libcamera-hello
- Run the command again, but this time we will use an option (argument) to force the viewport to remain open. To close the window, click the X or press CTRL + C. Using the preview window in this way provides Raspberry Pi HQ camera users have plenty of time to adjust the aperture and focus of the lens before taking any pictures. libcamera-hello -t 0 O camera works, but how do we capture an image? To quickly capture an image, we can use libcamera-jpeg. This tool is a simple “point and shoot” camera.
- Open a terminal and enter the command to start the camera, take a photo and save it as test.jpg. libcamera-jpeg -o test.jpg
- Use the following options to take a photo, called test1080.jpg with a five-second preview delay and an image size of 1920 x 1080. Note that the -t time is specified in milliseconds. libcamera-jpeg -o test1080.jpg -t 5000 –width 1920 –height 1
advanced options
The most advanced way to capture images is via libcamera-still. This command shares a similarity to raspistill, in that many of the same arguments work throughout the pair.
- Open a terminal and enter the command to start the camera, take a photo and save it as still-test.jpg. libcamera-still -o still-test.jpg
- To capture a png image, use the -e option to specify the encoding and ensure the filename ends in .png. We can change the encoding to png, bmp, rgb and yuv420. libcamera-still -e png -o still-test.png
- Use the –datetime switch to capture an image. This will save the image as a JPG using the MMDDhhmmss date format as the filename. libcamera-still –datetime
Capturing Video
Using libcamera-vid, we can capture high definition video in h264, mjpeg and yuv420 formats.
- Open a terminal and enter the command to start the camera, record a ten-second video and save it as test.h264. You will notice that the options, -t and -o work the same as with libcamera-still. We can use the –codec option to use mjpeg or yuv420 output formats. libcamera-vid -t 10000 -o test.h264
- Browse to the folder containing the file (/home/pi) and right click on test.h264 and select VLC Media Player to play the file. The Raspberry Pi camera it has no microphone, so there will be no sound.
video streaming
Using libcamera-vid we can stream video over a network, for example a pet camera or bell
- Open a terminal and configure libcamera-vid to show a preview screen and then listen for any IP address to connect to port 8888 libcamera-vid -t 0 –inline –listen -o tcp: //0.0.0.0: 8888
- On another computer, open VLC and go to Media » Open Network Stream
- Enter the following URL and click Run. There will be a few seconds of delay between which camera see and transmit it to VLC. tcp / h264: // raspberrypi.local: 8888
Final note
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