FFMPEG - Merge Video-A with audio of of Video-B in a single command?

Question

I would like to use the video of video A, and put the audio of video B on top. How would I do this with ffmpeg in the command line? I have found tutorials to do this with extracting the audio first to a wav file, but I was wondering whether it's possible to do this in a single command? and without transcoding everything again?

edit: both files are .mp4 files and both contain video & audio. both files are of equal length.

I'm sorry I should've been more clear! A does have audio and I want to get rid of it, only keeping the video. B does have video and I want to get rid of it, only keeping the audio. — R. Kohlisch, Apr 16 '19 at 15:08
thats not a worry, in my case they will always be of equal length. — R. Kohlisch, Apr 16 '19 at 15:17

score 3 · Answer 1 · answered Apr 16 '19 at 15:31

3

Basic command form is

ffmpeg -i videoA -i videoB -map 0:v -map 1:a -c copy videoAaudioB.mp4

Basic requirement is that A's video and B's audio should be compatible with file format of the output.

answered Apr 16 '19 at 15:31

Gyan

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FFMPEG - Merge Video-A with audio of of Video-B in a single command?

1 Answers1