Exporting edited audio back into MP4 video / replacing the original video file's audio with the edited version

[Captain_Choppy]

So, i have installed the FFmpeg so i can open audio from MP4 video files… i can open the audio, get rid of the hiss etc, but can i save it back into the original video file so the new edited audio replaces the old hissy audio on the video file?? I can’t see any way to do this…

[Trebor]

@Captain_Choppy

can i save it back into the original video file so the new edited audio replaces the old hissy audio on the video file

Not in Audacity. You need a video editor to combine the video with the new audio … List of video editing software - Wikipedia

IIRC “VLC media player” can add new audio to video …

VLC media player

https://www.youtube.com/results?search_query=VLC+add+new+audio+to+video