Use ffmpeg to create a supercut from a directory of videos

supercut.sh

#!/bin/bash

set -euo pipefail

mkdir -p ./cuts
if [[ $(ls -A ./cuts) ]]
then
  rm ./cuts/*
fi
if [[ -f ./cuts.txt ]]
then
  rm ./cuts.txt
fi
if [[ -f ./supercut.mp4 ]]
then
  rm ./supercut.mp4
fi

files="$(ls -1 | egrep '\.mp4$')"
num_files="$(ls -1 | egrep '\.mp4$' | wc -l)"

video_index=0
video_start=0
seconds_per_video=1
total_seconds_per_video=10
frames_per_second=24

for file in ${files}
do
  # TODO handle when video_start + seconds_per_video > total_seconds_per_video

  echo "video index" $video_index
  echo "video_start" $video_start

  ffmpeg -hide_banner -loglevel error -ss "${video_start}" -i "${file}" -t "${seconds_per_video}" -c copy "./cuts/${video_index}.mp4"
  echo "file cuts/${video_index}.mp4" >> "./cuts.txt"


  video_index=$((${video_index} + 1))
  video_start=$(((${video_start} + ${seconds_per_video}) % ${total_seconds_per_video}))
done

ffmpeg -hide_banner -loglevel error -f concat -i ./cuts.txt -c copy ./supercut.mp4