adding repeated background audio with ffmpeg [closed]

Answer 1

I ran into the same problem and managed to do it by using ffmpeg and concat[enate] filter. Here is an example of how to loop it three times:

ffmpeg -i audio.wav -filter_complex "[0:a]afifo[a0];[0:a]afifo[a1];[0:a]afifo[a2];[a0][a1][a2]concat=n=3:v=0:a=1[a]" -map "[a]" out.wav

Answer 2

ffmpeg has the promising -loop_input flag, but it doesn't support audio inputs yet.

I'd recommend sox and the -shortest option for ffmpeg as a solution.

sox short_audio.mp3 looped_audio.mp3 repeat 1000 # adjust count as necessary
ffmpeg -i input_video.mp4 -i looped_audio.mp3 -shortest output_video.mp4

The sox command will loop the input, and the ffmpeg command will use it for the audio, but stop when it runs out of video to process.