How to run this ffmpeg command lines in hybrid？

[i990049]

filename="*.mp4"
for i in $filename; do
    echo $i
    if [[ ! -d ./out_mp4 ]];then
        mkdir ./out_mp4
    fi
    pwd
    echo 
    ffmpeg.exe -i "$i" -map 0:v -c:v copy -bsf:v h264_mp4toannexb raw.h264 -y
    ffmpeg.exe -fflags +genpts -r 24 -i raw.h264 -i "$i" -map 0:v -c:v copy -map 1:a -af atempo=0.8 -movflags faststart ./out_mp4/"$i"  -y
    rm raw.h264
done