# /etc/apt/sources.list默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-security main restricted universe multiverse

树莓派qtcreator安装

sudo apt-get install build-essential libssl-dev nmap g++ cmake automake
sudo apt-get install qt5-default qtcreator qtmultimedia5-dev libqt5serialport5-dev qtdeclarative5-dev qt5* qml-module-* pyqt5* python-nose python-empy

sudo apt-get install build-essential libssl-dev nmap g++ cmake automake qt5-default qtcreator qtmultimedia5-dev libqt5serialport5-dev qtdeclarative5-dev qt5* qml-module-* pyqt5* python-nose python-empy

QML全屏显示
ApplicationWindow {
width: Screen.desktopAvailableWidth
height: Screen.desktopAvailableHeight
flags:Qt.FramelessWindowHint 去除标题栏
visibility:Window.FullScreen

树莓派视频推流

raspivid -fl -t 0 -w 960 -h 720 -b 1200000 -fps 15 -pf high -o - |ffmpeg -f h264 -i - -c copy -an -f flv -y rtmp://localhost/live/t1

ffmpeg 拉rtsp 推rtp

ffmpeg -re -i  "rtsp://admin:shhk@123@192.168.8.100:554"   -fflags nobuffer  -vcodec copy -f rtp_mpegts rtp://127.0.0.1:1234 

阿里云管道端口转发:
rm -rf /tmp/fifo; mkfifo /tmp/fifo;nc -ll -p 9900 < /tmp/fifo | nc -ll -p 9901 > /tmp/fifo
raspivid -fl -t 0 -w 960 -h 720 -b 1200000 -fps 15 -pf high -o - |nc s2.icode.ml 9900
mplayer -fps 200 -demuxer h264es ffmpeg://tcp://s2.icode.ml:9901

wpa_supplicant.conf 配置文件连接 WiFi 设备。

ctrl_interface=DIR=/var/run/wpa_supplicant
GROUP=netdev
update_config=1
network=
{
ssid=“WiFi的SSID”
psk=“WiFi密码”
}

ros树莓派安装
/etc/hosts
151.101.84.133 raw.githubusercontent.com
apt install pyqt5* python-nose python-empy

http://wiki.ros.org/ROSberryPi
https://blog.csdn.net/hua_lun_tong_xue/article/details/106930273
https://www.ncnynl.com/archives/201608/499.html