[Help] Extract Audio from one file and merge it to another file

[vampelle]

I hope this is the right place to ask.

I have two files of same movie, one have 5.1 audio but not great quality of video while the other have stereo audio and excellent video quality.

now, the thing is i need to extract 5.1 audio and add it to other file while also not keeping its audio.

how can i do this.

[Baldrick]

Use video multiplexers. https://www.videohelp.com/tools/sections/video-de-multiplexers

If you want more details you must give us more details. What is the container(avi, wmv, mkv, mp4, dvd vobs, etc)?

[vampelle]

Almost forgot the 5.1 audio is mp4 file and better video quality one is mkv file, same timing and all