Cut commercials from the video file and join files

cutads.sh

#!/usr/bin/env bash

NAZWA="$(basename "$1" | sed 's/\(.*\)\..*/\1/')"

echo "Generating split command\n"
KOMENDA="tr -d '\n' < \"$NAZWA.ffsplit\""
STRING=`eval $KOMENDA`
echo $STRING
#echo "ffmpeg -i \"$1\""
eval "ffmpeg -i \"$1\" $STRING"
echo "Done split"
echo "Generate merge command"

#First counting line in ffsplit file
ILE="wc -l < \"$NAZWA.ffsplit\""
ILEWYNIK=`eval $ILE`


if [ -n "$2" ]; then 
    CODEC=$2
else
    CODEC="libx264"
fi



if [ $ILEWYNIK -lt 10 ]; then

STRING="ffmpeg -i \"concat:"

for (( i=0;i<$ILEWYNIK-1;i++ )) ; 
do
    STRING=$STRING"segment00$i.ts|"    

done

else
    STRING="ffmpeg -i \"concat:"

    for (( i=0;i<9;i++ )) ; 
    do
        STRING=$STRING"segment00$i.ts|"    

    done
    for (( i=10;i<=$ILEWYNIK-1;i++ )) ; 
    do
        STRING=$STRING"segment0$i.ts|"    

    done


fi


KOMENDA=$STRING"\" -c:v $CODEC -c:a ac3 -f mpegts output.mpg"
echo $KOMENDA 
echo "Starting merge segments"
eval "$KOMENDA"
echo "Done.Removing segments"
rm segment*.ts
mv output.mpg "_$1"