sh ./scenesplit.sh inputfile.mp4

scenesplit.sh

#/bin/bash

start=0; 
count=0; 
in="$1"
#bn="$(basename "$in")"
bn="out"
echo "=============================================================================="
echo "FILE START: $bn"
mkdir "./$bn"

echo "Finding Scene... this might take a while..."
ffmpeg -nostdin -ss 300 -i "$in" -filter:v "select='gt(scene,0.8)',showinfo" -f null - 2>"./$bn/ffout.tmp.txt"

echo "Filtering timestamp... this might take a while..."
grep showinfo "./$bn/ffout.tmp.txt" | grep pts_time:[0-9.]* -o | grep '[0-9]*\.[0-9]*' -o > "./$bn/timestamps.tmp.txt"

scenes=$(wc -l < "./$bn/timestamps.tmp.txt")
echo "Found $scenes scenes"
sleep 10

while IFS= read -r line; do
    echo "---------------------------------------------------------------------------"
    echo "SCENE START: $count/$scenes ($start,$line)"
    ffmpeg -i "$in" -ss "$start" -to "$line" -nostdin -y -vcodec libx264 -acodec aac -g 120 -s 720x480  "./$bn/$bn.($count of $scenes).mp4"
    echo "SCENE DONE:$count/$scenes ($start,$line)"
    echo "---------------------------------------------------------------------------"
    start=$line
    count=$(($count+1))
    sleep 1

done <"./$bn/timestamps.tmp.txt"
echo "---------------------------------------------------------------------------"
echo "LAST SCENE START:$count/$scenes ($start,end)"
ffmpeg -i "$in" -ss "$start" -nostdin -y -vcodec libx264 -acodec aac -g 120 -s 1280x720 -r 30 "./$bn/$bn.($count of $scenes).mp4"
echo "LAST SCENE DONE:$count/$scenes ($start,end)"
echo "---------------------------------------------------------------------------"

echo "FILE DONE: $bn"
echo "=============================================================================="