#!/bin/bash
function codec {
    ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $1
}
for i in *.mp4
do j="$(codec $i)"
   if [ $j == h264 ]
   then
     ffmpeg -hwaccel qsv -c:v h264_qsv -i $i -c:v h264_qsv -global_quality 20 -preset slow done/$i
     mv $i $i.done
   elif [ $j == hevc ]
   then
     ffmpeg -hwaccel qsv -c:v hevc_qsv -i $i -c:v hevc_qsv -global_quality 20 -preset slow done/$i
     mv $i $i.done
   fi
done