bash script for transcoding multiple video files in batch using ffmpeg, specifically for Animations/anime

batch_encode_ffmpeg.sh

#!/bin/bash
# Settings in this script is suitable for animes
####
#  To use simply put this script inside the folder where your source files are, edit dest variable to change destination folder
# TODO: add arguments for source and dest
####
# Where to store encoded files

TAG="[Hulk] " #put your own if you like or remove the text
dest=/var/www/ripperR/ripper/files/clannad
bframes=6
psy_rd=0.65
aq_mode=3
aq_strength=0.7
pix_fmt=yuv420p10le #10bit
preset=slow
crf=25

#audio, keep source configuration
acodec=libfdk_aac

#No subtitle settings, always copy subtitles to prevent breaking

for file in *.mkv
  do
          if [ -f "$dest/$TAG$file" ]; then
                  echo "ERROR: $dest/$TAG$file exists."
          else
                  echo "Starting to encode file: $file"
                  ffmpeg -i "$file" -map 0 -c:v libx265 -x265-params bframes=$bframes:psy-rd=$psy_rd:aq-mode=$aq_mode:aq-strength=$aq_strength -pix_fmt $pix_fmt -preset $preset -crf $crf -c:a libfdk_aac -vbr 4 -c:s copy "$dest/$TAG$file"
          fi
  done

acodec is defined but not used