work around for PhantomJS Uint8Array-to-String problem
work around for PhantomJS Uint8Array-to-String problem

hanzeil/mp4box.js,hanzeil/mp4box.js,b123400/mp4box.js,sjames1958gm/mp4box.js,sjames1958gm/mp4box.js,gpac/mp4box.js,gpac/mp4box.js,b123400/mp4box.js