concat-daily-movies

#!/bin/bash
#
# compacts all daily movies to one monthly film

if (( $(find -iname '*.webm'|wc -l) > 0 ))
then
	EXT='.webm'
  MONTH=$(stat -c%n *.webm|cut -b 1-7|head -1)
elif (( $(find -iname '*.mp4'|wc -l) > 0 ))
then
	EXT='.mp4'
  MONTH=$(stat -c%n *.mp4|cut -b 1-7|head -1)
else
	echo "no mp4 nor webm files found in $(pwd)"
	exit
fi

if [ -f $MONTH-sound$EXT ]
then
  echo $MONTH-sound$EXT already exist.
  rm -i $MONTH-sound$EXT
  exit
fi

if [ -f $MONTH-month$EXT ]
then
  echo $MONTH-month$EXT already exist.
  rm -i $MONTH-month$EXT
  exit
fi

echo "#file list for concatenation" > mylist.txt
\ls -1 *$EXT | while read line
do echo file \'$line\' >> mylist.txt
done
ffmpeg -f concat -safe 0 -i mylist.txt -c copy $MONTH-month$EXT
if [ "$EXT" == ".webm" ]
then
  ffmpeg -i $MONTH-month$EXT -i ~timelapse/archive/movies/sound/alles.webm -c copy -shortest $MONTH-sound$EXT
else
  # assuming mp4
  ffmpeg -i $MONTH-month$EXT -i ~timelapse/archive/movies/sound/alles.mp3 -c copy -shortest $MONTH-sound$EXT
fi
echo monthly movie in $MONTH-month$EXT
rm mylist.txt