Standalone bash script for batch iPhone video conversion

BatchHQ.sh

#!/bin/bash

# Q: upper bitrate limit: 1/Q
Q=2
for file in `find ./input/ -iname "*.mov"`; 
do 
    echo $file
    bitrate=`./ffprobe -v error -select_streams v:0 -show_entries stream=bit_rate -of csv=p=0 $file`
    bitrate=`awk -v var="$bitrate" -v Q="$Q" 'BEGIN {OFMT="%d";print var/Q}'`
    echo $bitrate
    # ffmpeg for crf
    ./ffmpeg -y -i $file -vcodec libx265 -pix_fmt yuv420p10le -crf 21 -x265-params "asm=avx512" -preset slow -tag:v hvc1 -profile:v main10 -acodec copy output2.mov
    tgt_bitrate=`./ffprobe -v error -select_streams v:0 -show_entries stream=bit_rate -of csv=p=0 output2.mov`

    if [ $tgt_bitrate -lt $bitrate ] 
    then
        mv ./output2.mov ./output/`basename $file`
    else
        # The crf file is larger than the expectation.
        # we need a better rate control. Invoke the 2pass.
        ./ffmpeg -y -i $file -vcodec libx265 -pix_fmt yuv420p10le -b:v $bitrate -x265-params "pass=1:asm=avx512" -preset slow -tag:v hvc1 -profile:v main10 -acodec copy -f mov tmp
        ./ffmpeg -y -i $file -vcodec libx265 -pix_fmt yuv420p10le -b:v $bitrate -x265-params "pass=2:asm=avx512" -preset slow -tag:v hvc1 -profile:v main10 -acodec copy output.mov
        mv ./output.mov ./output/`basename $file`
    fi
    ./exiftool -tagsFromFile $file -ExtractEmbedded -all:all -overwrite_original ./output/`basename $file`
done