Script to compress mp4 files using ffmpeg

conv.sh

#! /bin/bash

# The Purpose of this Script is to batch convert and compress any video file to mp4 format
#
# WARNING: LOSSY COMPRESSION !!!

# Variable used:
# sourcedir is the directory where to be converted videos are. Converted video will be saved in the same folder

# usage:
#########################
# conv.sh *folder*
#########################

# Source dir
sourcedir="$1"
if [[ $sourcedir ]]; then 
     echo -e "Using \033[1;34m$sourcedir\033[0m as Input Folder"
	else
	 echo -e "\033[1;31mError: Check if you have set an input folder\033[0m"
	 exit
fi

# Suffix

suffix="_x264"

################################################################
cd "$sourcedir"

for filelist in `ls`
do
	if ffmpeg -i $filelist 2>&1 | grep 'Invalid data found'		#check if it's video file
	   then
	   echo "ERROR File $filelist is NOT A VIDEO FILE can be converted!"
    continue	   
	
fi
    echo "Converting "$filelist""
# real compressing
	echo -e "ffmpeg -i "$filelist" -y -f mp4 -c:a libfdk_aac -b:a 192k -c:v libx264 -crf 23 -preset slow -map_metadata 0 "$sourcedir/${filelist%.*}$suffix.mp4" < /dev/null"
	ffmpeg -i "$filelist" -y -f mp4 -c:a libfdk_aac -b:a 192k -c:v libx264 -crf 23 -preset slow -map_metadata 0 "$sourcedir/${filelist%.*}$suffix.mp4" < /dev/null
	
#done
echo -e "\033[1;32mDONE, your video files have be processed\033[0m"
exit

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unexpected end of file

You have to uncomment line 44 and install ffmpeg codec