uotw

#!/usr/bin/env bash
finalwidth=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of csv=p=0 $1)
finalheight=$(ffprobe -v error -select_streams v:0 -show_entries stream=height -of csv=p=0 $1)
halfwidth=$(echo "$finalwidth/2" | bc)
halfheight=$(echo "$finalheight/2" | bc)
x="x"
ffmpeg -i $1 -i $2 -i $3 -i $4 -filter_complex "nullsrc=size=$finalwidth$x$finalheight [base]; [0:v] setpts=PTS-STARTPTS, scale=$halfwidth$x$halfheight [upperleft]; [1:v] setpts=PTS-STARTPTS, scale=$halfwidth$x$halfheight [upperright]; [2:v] setpts=PTS-STARTPTS, scale=$halfwidth$x$halfheight [lowerleft]; [3:v] setpts=PTS-STARTPTS, scale=$halfwidth$x$halfheight [lowerright]; [base][upperleft] overlay=shortest=1 [tmp1]; [tmp1][upperright] overlay=shortest=1:x=$halfwidth [tmp2]; [tmp2][lowerleft] overlay=shortest=1:y=$halfheight [tmp3]; [tmp3][lowerright] overlay=shortest=1:x=$halfwidth:y=$halfheight" -c:v libx264 quad_vid.mp4

uotw

//this snippet of code is from inav-2.4.0-RC1/src/main/io/osd_dji_hd.c
case DJI_MSP_NAME:
            {
                        
                /* DIRECTION TO HOME, DIST TO HOME, SPEED, ALT */
                int speed = (int)(gpsSol.groundSpeed * 0.0223694);  // centimeters per second to MPH
                int altitude = (int)lrintf(getEstimatedActualPosition(Z) * 0.0328084);  // centimeters to feet
                static char dirAndDist[16];
                static char arrow[7];