Modify/Fix PHP script: MP3 to PNG waveform batch maker (need fix size limit/quantity) -- 3

Modify/Fix PHP script: MP3 to PNG waveform batch maker (need fix size limit/quantity) What wavemaker does: it converts mp3 file to [login to view URL] (waveform) in batch by drag drop mp3 folder into script window. This is the wavemaker script itself: [login to view URL] (you can test it on localhost) What i need: 1. Script is limited by 30-50mb per song - Need make 500MB per file (Idea for you: you can modify script to split song in parts etc), try convert big file 150-200mb (as i know chrome limits upload size in browser or smth) need to have solution for that. 2. Script is limited 50-60 songs per upload total, need unlimited or at least 2000-3000. 3. Script gives wrong filenames on output if song name is on japanesse, cyrillic or special symbols.- need fix that. 1-2 days for 50$ max Happy Bidding.