https://github.com/greatcattw/ubuntu_22_usb_camera_qt5_gstreamer

Display USB camera on ubuntu22 with Qt
https://github.com/greatcattw/ubuntu_22_usb_camera_qt5_gstreamer

gstreamer ubuntu22 usbcamera videooverlay videowidget

Last synced: about 2 months ago
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Display USB camera on ubuntu22 with Qt

• Host: GitHub
• URL: https://github.com/greatcattw/ubuntu_22_usb_camera_qt5_gstreamer
• Owner: greatcattw
• Created: 2024-11-11T09:11:40.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-12-18T09:34:33.000Z (5 months ago)
• Last Synced: 2025-02-02T22:35:19.540Z (3 months ago)
• Topics: gstreamer, ubuntu22, usbcamera, videooverlay, videowidget
• Language: C++
• Homepage:
• Size: 1.39 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ubuntu_22_usb_camera_qt5_gstreamer

Display USB camera on ubuntu22 with Qt 


OS: Ubuntu 22.04.3 


Qt Creator 4.11.1, Qt 5.14.1, GCC 5.3.1 





There are 2 way to use: 


(1) overlay 


(2) QVideoWidget 
 

From QT5.12.2, there is a quick call. 


QMediaplayer->setMedia(QUrl("gst-pipeline: videotestsrc !  videoconvert ! xvimagesink name=\\\"qtvideosink\\\"")); 





Overlay and USB camera 


![pic](pic/1.png)





QVideoWidget and videotestsrc 


![pic](pic/2.png)





QVideoWidget and USB camera 


![pic](pic/3.png)





# Just run executable file

sudo apt-get update 


sudo apt-get install libqt5widgets5 


sudo apt-get install libqt5multimedia5 libqt5multimediawidgets5 


sudo apt-get install libqt5multimedia5-plugins 


# Compile the source code

sudo apt-get update 





sudo apt-get install build-essential 


sudo apt-get install libfontconfig1 


sudo apt-get install mesa-common-dev 


sudo apt-get install libglu1-mesa-dev 


sudo apt-get install libx11-dev libxext-dev libxtst-dev 





download and install qt-opensource-linux-x64-5.14.2.run 





sudo apt-get install libqt5widgets5 


sudo apt-get install libqt5multimedia5 libqt5multimediawidgets5 


sudo apt-get install libqt5multimedia5-plugins 





sudo apt-get install libqt5gstreamer-dev 





# Note 1 : Install driver

ASUS S501MER  RTX5060 NVIDIA 


OS: Ubuntu 22.04.3 


sudo apt-get update 


sudo apt-get install libc-dev -y 


sudo apt-get install linux-headers-$(uname -r) -y 


sudo apt-get install ubuntu-drivers-common -y 


sudo apt-get install nvidia-driver-550 -y 


# Note 2 : Install full gstreamer 

sudo apt-get -y install \ 


libgstreamer1.0-dev \ 


libgstreamer-plugins-base1.0-dev \ 


libgstreamer-plugins-bad1.0-dev \ 


gstreamer1.0-plugins-base \ 


gstreamer1.0-plugins-good \ 


gstreamer1.0-plugins-bad \ 


gstreamer1.0-plugins-ugly \ 


gstreamer1.0-libav \ 


gstreamer1.0-tools \ 


gstreamer1.0-x \ 


gstreamer1.0-alsa \ 


gstreamer1.0-gl \ 


gstreamer1.0-gtk3 \ 


gstreamer1.0-qt5 \ 


gstreamer1.0-pulseaudio  


# Note 3: Autorun 

在Ubuntu, 要讓程式開機自動啟動, 方法之一是用systemd服務. 


在/lib/systemd/system加個文字檔. 


若是程式是有視窗與聲音的, 還要加環境參數 


User=gcat 


Group=gcat 


Environment=DISPLAY=:0 


Environment=XAUTHORITY=/home/gcat/.Xauthority 


Environment=XDG_RUNTIME_DIR=/run/user/1000 


Environment=QT_QPA_PLATFORM=xcb 


## 例子  

[Unit] 


Description=autorun test09 


After=multi-user.target 


Wants=multi-user.target 


#After=graphical.target 


 


[Service] 


#ExecStartPre=/bin/sleep 5 


ExecStart=/usr/bin/test09 


Restart=no 


User=gcat 


Group=gcat 


Environment=DISPLAY=:0 


Environment=XAUTHORITY=/home/gcat/.Xauthority 


Environment=XDG_RUNTIME_DIR=/run/user/1000 


Environment=QT_QPA_PLATFORM=xcb 


 


[Install] 


WantedBy=multi-user.target