ffmpeg image folder to movie

foundfolders=0
for folders in "$@" ;do
            if [ -d "$folders" ]; then
              echo "$folders"
              foundfolders=1
            fi
done
if  [ $foundfolders = 0 ]; then
echo "You need to drop some folders"
exit
fi


echo #

for folders in "$@" ;do




    echo encoding $folders
    if [ -d "$folders" ]; then
    echo "$folders"
    cd "$folders"
    # check if there are any jpg, png or tga files in folder
                jpgfound=0
                pngfound=0
                tgafound=0

                shopt -s nullglob
                for files in *.jpg ;do

                jpgfound=1
                done

                shopt -s nullglob
                for files in *.png ;do

                pngfound=1
                done

                shopt -s nullglob
                for files in *.tga ;do

                tgafound=1
                done


                if  [ $jpgfound = 1 ]; then
                echo "some jpgs there"
                ext="jpg"
                fi
                if  [ $tgafound = 1 ]; then
                ext="tga"
                echo "some tgas there"
                fi
                if  [ $pngfound = 1 ]; then
                ext="png"
                echo "some pngs there"
                fi
                echo extension used will be $ext


                #set -o verbose #echo on
                #making temporary simbolic links to make ffmpeg happy with filenaming
                if [ -d "$folders" ]; then

                echo "$folders"

                x=1;
                for i in "$folders"/*"$ext"; do
                counter=$(printf %05d $x); ln -s "$i" /tmp/img"$counter"."$ext"; x=$(($x+1));
                done

                #encoding

                filename=$(basename "$folders")
                echo "$filename"



                    # ffmpeg command:
                    optionsCRF="-vcodec libx264 -preset medium -tune film -crf 21 -threads 0"
                    set -x
                    $ffmpeg -f image2 -i /tmp/img%05d."$ext" $optionsCRF "$folders"/"$filename".mp4
                    set +x



                #removing temporary simbolic links
                x=1;
                for i in "$folders"/*"$ext"; do
                counter=$(printf %05d $x); rm /tmp/img"$counter"."$ext"; x=$(($x+1));
                done

                fi

    fi


done