Synch a new audio on a video

[JS18]

I want to know what program...that I should use to Synch a English language audio track on a video that has german audio(replace the german audio by the english one)

[housepig]

on a video file or on a dvd?

for a video file, you can use Virtualdub (for avi) or Virtualdubmod (for mpg) and select "Audio from file" under Audio. Then save as a new file.

for a dvd, use demuxed files and mate the original video file with any replacement audio file of your choice.