i recently downloaded a anime series and it was a mkv container i converted the files to mp4 and i forgot to set everything to english so i was wondering if there is a program that will allow me to get into the mp4 files and extract the jap audio and subtitles so i will just have english. i just downloaded the mkvmerge gu 2.1.0 so i have that for the next time just need one for mp4 someone please help
