How to view video file with external ac3 audio track?

And here's how to do this with VLC via the command line:

vlc videofile --input-slave audiofile

, then select the audio channel.

NB. Though not strictly related, --sub-file <subfile> will also load subtitles.

First install smplayer:

sudo apt-get install smplayer

Then open the video file and select audio > load external audio file

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If you want to do this with mplayer from the command line, use the -audiofile flag. Example:

mplayer video.mp4 -audiofile sound.mp3

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