Compress all *.mp4 files in the folder. Using FFmpeg.

compress.bash

#!/usr/bin/env bash                                                                                                     
                                                                                                                         
set +x                                                                                                                  
                                                                                                                        
for file in *.mp4; do                                                                                                   
    if [[ $file == *'_new'* ]]; then                                                                                    
        echo "----Pass file: ${file}----"                                                                               
        continue                                                                                                        
    fi                                                                                                                  
    filename="${file%.*}"                                                                                               
    ffmpeg -n -i "${file}" -vcodec h264 -crf 19 -filter:v fps=fps=15 -acodec aac \                                      
            "${filename}_new.mp4"                                                                                       
    if [ $? == 0 ]; then                                                                                                
        mv "${file}" ~/.local/share/Trash/files/                                                                                                       
    fi                                                                                                                                                 
done