Build a Website for videos -- 2

Hello, I have existing websites but its not live yet I will provide you php files. It has feature to add images and display slide show but does not have feature to add music, subtitles, video effects in video so I need to implement that feature too. Also want to add play, pause, stop etc to slideshow although slideshow is working but need to upgrade it. At last have some small changes to design. Please write ffmpeg at start to consider your bid. I have only 7-8 days for this work and it is very strict so only bid if you can do it in this deadline. 100% milestone I will create at time of award but release it when 100% work has been done. If you agreed to time and payment terms you are welcome to bid.