ffmpeg: How do I loop audio when encoding video? [closed]

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I'm trying to encode a video with an mp3 and have that audio stream loop while the video stream is still running. The video steam is priority.

I haven't seen commands in ffmpeg that allow this specifically. Does anyone have an idea?

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I don't think ffmpeg supports this functionality. As far as I know, you will have to generate your audio loop in a new mp3 file outside of ffmpeg prior to overlaying the audio on your video.