Add an audio file to and mkv video
Solution 1
kdenlive and add a second audio track, then remux
Solution 2
You can install mkvtoolnix;
sudo apt-get install mkvtoolnix
Then use mkvmerge from the installation to mux audio and video into the mkv container from the command line.
There is also a Gui tool, mkvtoolnix-gui that is a front end to mkvtoolnix.
sudo apt-get install mkvtoolnix-gui
Example to mux video file called, input-video.mkv with a sound file called soundfile.mp3, creating a new muxed mkv file called output-with-sound.mkv, do the following in the directory where you have the video without audio and the audio file:
mkvmerge -o output-with-sound.mkv -A input-video.mkv soundfile.mp3
More examples including synchronization here: http://www.bunkus.org/videotools/mkvtoolnix/doc/mkvmerge.html
Solution 3
I'm not sure why mencoder didn't work for you, but you can also do the same thing with ffmpeg. You just need to use two inputs to ffmpeg.
ffmpeg -i track.mp3 -i out.mkv -vcodec copy -acodec libfaac -ab 192k final.mkv
I didn't try it, but I don't think you can do -acodec copy, especially since you're using two different codecs. Just pick whatever you want in the output and add that in, its really fast compared to the video.
Javier López
Updated on September 17, 2022Comments
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Javier López almost 2 years
I'm quite new to multimedia things, I'm trying to find a way to make nice screencasts, I've already been able to capture my desktop with ffmpeg:
$ ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y out.mkv
It works pretty nice, but I'd like to add music in the background, if I add it with mencoder:
mencoder -ovc copy -oac mix -audiofile track.mp3 out.mkv -o out.mp4
It delete the video sound, I don't want to replace it, I want to add music to my explanation, any ideas?
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Javier López over 13 yearsOMG!, I dint' know kdenlive, I'll definitely check it out!, thx, if anyone else knows how to do it in the console please let me know.
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RobotHumans over 13 yearssox merge described here: sox.sourceforge.net/sox.html#lbAJ I would split the audio out of the video the sox merge them, then mux it back together with the video
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Javier López over 13 yearsthx a lot aking that's just what I'll do
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Javier López over 13 yearsthx a lot sabacon!, I didn't know about mkvmerge, I'll use it to mux back the mixed audio
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augusto over 8 yearscorrect install command is
sudo apt-get install mkvtoolnix-gui
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Sabacon over 8 years@augusto Thanks a lot, I did not notice the extra hyphen, and to know this thing was there for so long.
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user2513149 over 5 yearsVLC cannot open the
mkv
file after adding or removing an audio track using this command. -
Tiwenty over 3 yearsYes, mkv muxing in ffmpeg is busted. See this issue trac.ffmpeg.org/ticket/6037, they don't even seem to care. Ffmpeg is notorious for being slow, but this is even closing the eyes on the issue.