Steve Posted September 1, 2014 Share Posted September 1, 2014 With AVI files, I use Nandub. It allows you to open a file then browse for an alternate audio file for the video, then you can save it without re-encoding - it just replaces the audio with the file you selected, so there's no quality loss on the video. Does anyone know of a way to do this with MP4 files? Quote Link to comment Share on other sites More sharing options...
Steve Posted September 1, 2014 Author Share Posted September 1, 2014 Turns out I already had a program that can do it: - http://www.bigasoft.com/articles/replace-audio-in-video.html Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted September 1, 2014 Share Posted September 1, 2014 virtualdub with the FFMPEG input driver can do it, if you select "direct stream copy" in the video menu. Although you have to save it as an avi file it doesn't do any recompressing. Quote Link to comment Share on other sites More sharing options...
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