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ffmpegHow to use map to select streams

If you want to select specific input streams (e.g. first video channel from first file and third audio channel from second file) and use them for your output, you use map:

ffmpeg -i in.mp4 -i in.mp3 -map 0:v:0 -map 1:a:2 out.mp4ctrl + c
-i in.mp4

first input (video file)

-i in.mp3

second input (audio file)


maps selected input streams to output


map first video stream of first input


maps third audio stream of second input


resulting video file