Raspberry Pi 4B (aarch64, arm64) bullseye installs Qt5, GStreamer

Introduction

This article describes the first compilation and installation task after the Raspberry Pi 4B Raspberry Pi OS (64-bit) is started: Qt5 + GStreamer, which is also the preparation work before OpenCV compilation and installation, so: Start -> Qt5 + GStreamer -> The order of OpenCV cannot be wrong.

• Install Qt5

  sudo apt-get update
  sudo apt-get upgrade
  sudo apt-get install clang qtbase5-dev qtchooser
  sudo apt-get install qt5-qmake qtbase5-dev-tools
  sudo apt-get install qtcreator
  sudo apt-get install qtdeclarative5-dev
  

  If all goes well, you should see the following welcome screen when starting Qt Creator.
  
  

• Install GStreamer

• install dependencies

  sudo apt-get install libx264-dev libjpeg-dev
  

• Install remaining plugins

  sudo apt-get install libgstreamer1.0-dev \
   libgstreamer-plugins-base1.0-dev \
   libgstreamer-plugins-bad1.0-dev \
   gstreamer1.0-plugins-ugly \
   gstreamer1.0-tools \
   gstreamer1.0-gl \
   gstreamer1.0-gtk3
  # 如果安装了Qt5的话，安装接下来这个
  sudo apt-get install gstreamer1.0-qt5
  # 如果您想要使用音频，请安装
  sudo apt-get install gstreamer1.0-pulseaudio
  

• Connect the camera to test it

  gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink
  

  

  gst-launch-1.0 libcamerasrc ! video/x-raw, width=640, height=480, framerate=30/1 ! videoconvert ! videoscale ! clockoverlay time-format="%D %H:%M:%S" ! autovideosink
  

  

• If the tests are successful, you can proceed to the next step: compile and install OpenCV