code.delx.au - monosys/blob - split-mvimg

   1 #!/bin/bash
   2
   3 if [ -z "$1" ]; then
   4     echo "Usage: $0 MVIMG_xxx.jpg"
   5     exit 1
   6 fi
   7
   8 set -eu
   9
  10 infile="$1"
  11 outvid="${infile%.*}.mp4"
  12 outpic="${infile#MV}"
  13
  14 if ! [ -f "$infile" ]; then
  15     echo "Missing input file: $infile"
  16     exit 1
  17 fi
  18
  19 if [ -f "$outvid" ] || [ -f "$outpic" ]; then
  20     echo "Output files already exist! $outvid || $outpic"
  21     exit 1
  22 fi
  23
  24 size="$(stat -c '%s' "$infile")"
  25 revoffset="$(exiftool -m -p "\$MicroVideoOffset" "$infile")"
  26 if [ -z "$revoffset" ] || [ "$revoffset" -le 0 ]; then
  27     echo "Invalid video offset: $revoffset"
  28     exit 1
  29 fi
  30 offset=$((size - revoffset))
  31
  32 dd if="$infile" of="$outvid" bs="$offset" skip=1
  33 dd if="$infile" of="$outpic" bs="$offset" count=1
  34 exiftool -overwrite_original -xmp:all= "$outpic"