Depends on if you use Apple or Windows?
I download mp4 video files in stereo and wanted to synch the multi channel version of the audio which is downloaded seperatly. I have YAMB and HANDBRAKE downloaded but both seem really confusing to a newbi like myself. Any suggestions on software that will take the video from one source, strip that audio and allow me to add a new audio track and create a new mp4 file? Thanks.