ffmpeg - Permission denied when running binary, even as root
Looking at your file permissions, it looks like a simple permissions problem. The file does not have execution permissions for any users.

You can use many different options to set permissions:


chmod should work on most cases.
You can also use many file managers to set file permissions individually. The option you wound up using, ES File Explorer, is an excellent example of such.


You should also read up on Unix Permissions if you're not already familiar with the subject. It'll be a great help in the future.