[HELP] is there anyway to encode mp4 with another audio track by Hybrid?

[ssdde]

the original file is MP4, but with no subtitle, i want to encode a new MP4 file with subtitle in picture.

but the volume of the original file is a little low, so i need to using Adobe Audition to increase the sound, to get the new audio track.


the problem is how to encode new MP4 file with the new audio track by Hybrid?

of course using mkvtoolnix is a way, but the file will be mkv. what if i insist on the MP4 format, is there anyway?