gstreamer样例

#!/bin/bash

xrandr -s 0 --output DSI-1 
xrandr -s 0 --output HDMI-1 
xrandr --fb 1024x600 --output DSI-1  --mode 1024x600  --panning 0x0* 
xrandr  --output HDMI-1 --primary --mode 1920x1080   --output DSI-1 --off

xrandr --output HDMI-1 --primary --mode 1920x1080 --pos  0x0  --output DSI-1 --mode 1024x600 --pos  1920x0

gst-launch-1.0 v4l2src device=/dev/video11  ! videoconvert ! video/x-raw,format=NV12,width=1920,height=1080 ! xvimagesink

自身和外接显示器同屏

#!/bin/bash
# 

xrandr -s 0 --output DSI-1  # 设置默认分辨率，一般默认为最高分辨率
xrandr -s 0 --output HDMI-1  # 设置默认分辨率，一般默认为最高分辨率
xrandr --fb 1024x600 --output DSI-1  --mode 1024x600  --panning 0x0* 

# 复制屏幕操作，两块屏幕显示一致：
#xrandr --fb 1280x800 --output DSI-1 --primary --mode 1024x600  --panning 1280x800* --output HDMI-1 --mode 1280x800 --same-as DSI-1   
xrandr --fb 1024x600  --output DSI-1 --primary --mode 1024x600  --panning 1024x600* --output HDMI-1 --mode 1920x1080 --same-as DSI-1   

双屏同显

#!/bin/bash
echo 111 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio111/direction
echo 0 > /sys/class/gpio/gpio111/value
echo 112 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio112/direction


xrandr -s 0 --output DSI-1 

xrandr --fb 1024x600 --output DSI-1   --mode 1024x600  --panning 0x0* --output HDMI-1 --off


value=`cat /sys/class/gpio/gpio112/value`

cam=0
pos=0


function startcam {
     gst-launch-1.0 v4l2src device=/dev/video11  ! video/x-raw,width=1920,height=1080  ! videoscale ! 'video/x-raw,width=1024,height=600' ! videoconvert ! video/x-raw,format=NV12,width=1024,height=600 ! xvimagesink &
    cam=$!
    echo 1 > /sys/class/gpio/gpio111/value
    
}


echo "$value"

while [ true ]
do
  value=`cat /sys/class/gpio/gpio112/value`
   if [ "$pos" = "0" ]
   then
	  if [ "$value" = "0" ] 
	  then
	      echo "key pressed"
	      pos=1
	      if [ "$cam" = "0" ]
	      then
		 echo "start cam"
		 startcam
	      else
		 echo "kill cam = kill $cam"
		 /bin/bash -c "kill $cam"
		 cam=0
		 echo 0 > /sys/class/gpio/gpio111/value
		 
	      fi
	  else
	      echo "key not pressed"
	     
	  fi
  else
	 if [ "$value" = "0" ] 
	then
		      echo "key keep pressed"
		    
		  
		  else
		      echo "key not pressed"
		      pos=0
	 fi
  fi

  sleep 0.1
done