Script to compress all mp4 files in a folder

convert_all.sh

#!/bin/bash

if [ $# -ne 2 ]; then
	echo "Usage: $0 <input_type> <output_type>"
	exit 1
fi

tinput=$1
toutput=$2

# create a new directory for the output if it doesn't exist
if [ ! -d "output" ]; then
    mkdir output
fi

# create a new directory for processed file, if it doesn't exist
if [ ! -d "processed" ]; then
    mkdir processed
fi

# for each mp4 file in the current directory
for file in *.${tinput}
do
    # get the file name without the extension
    filename=$(basename "$file" .$tinput)
    
    # apply conversion
    echo "Working on $file .."

    ffmpeg -i $file -movflags use_metadata_tags -vcodec libx265 -crf 30 ${filename}_compressed.$toutput
    retVal=$?
    if [ $retVal -ne 0 ]; then
        echo "Error"
        exit $retVal
    fi

    # cp $file ${filename}_compressed.mp4
    mod_base=$(stat $file | head -n6 | tail -1)
    date=$(echo $mod_base | cut -d ' ' -f2 | sed 's/-//g')
    time_mod=$(echo $mod_base | cut -d ' ' -f3 | cut -d '.' -f1 | sed 's/://g')
    time=$(echo ${time_mod:0:4})

    touch -t $date$time golden.dat
    exiftool -addTagsFromFile $file -All:All ${filename}_compressed.$toutput
    touch -r golden.dat ${filename}_compressed.$toutput
    rm golden.dat

    # move the file to the processed directory
    mv ${file} processed/

    # move the file to the output directory
	mv ${filename}_compressed.$toutput output/

    # remove original file (exiftool's collateral output)
    rm ${filename}_compressed.${toutput}_original

    # break
done