I need to combine a movie without sounds and a MP3 file. How can I do it in OS X? I have Adobe After Effects but it is not at all intuitive to use -- or better I need to find some button to render the sounds with the movie but now no time -- is there some easy fast-to-use software for OS X to combine sounds and videos?

3 Answers 3


iMovie is the obvious choice. It's very easy to use and fairly reasonable in price. You might have it already if you have a newish mac or else it's $15 I think.


  • Awesome! Thank you so Apple way, clever -- worked like a charm without After Effect's slow rendering. Not professional thing but works :)
    – hhh
    Commented May 15, 2013 at 23:02

ffmpeg supports combining video and audio without re-encoding:

ffmpeg -i input.mov -i input.mp3 -c copy -map 0:0 -map 1:0 -shortest output.mov

-map 0:0 means input file 0, stream 0. -c copy copies video and audio codecs. -shortest makes the combined file as long as the shorter file.

  • The best and fastest choice to combine or merge audio and video files without re-encoding. Really useful. Thanks a lot!
    – GiovaLomba
    Commented Nov 28, 2015 at 9:53
  • Indeed, the quickest way without extra software. I have DaVinciResolve16 for editing, Handbrake, even VLC can maybe do it, but this was a simple quest, thank you a lot for this simple, effective and absolutely fast solution (avoiding also recompression). PD: this is 2020, 4 years later :) OS 10.14
    – leon
    Commented Apr 7, 2020 at 21:14
  • Thanks for the excellent answer, worked in seconds for me with 30 min mp3 and mov files. Commented Jan 22, 2023 at 0:07

Adobe After Effects

I remembered now how to do it in After Effects: Composition > Add to Render Queue and then click lossless and put the cross to the audio thing. Now specify the target and then hit Render.

A good video here how to do it.

  • Yet this solution is taking pretty long time do, hopefully someone able to provide a more casual way.
    – hhh
    Commented May 15, 2013 at 22:50

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