Convert Audio m4a Into Video mp4

Install

Install FFmpeg, a very powerful and versatile multimedia processing tool, with brew on macOS.

brew update
brew upgrade
brew install ffmpeg

Wait for the installation to finish (could take a long time) and verify the installation by launching FFmpeg

ffmpeg

From m4a to mp3

ffmpeg -i file_name.m4a file_name.mp3

From mp3 to mp4

ffmpeg -f lavfi -i color=c=black:s=1280x720 -i input.mp3 -shortest -fflags +shortest output.mp4

From m4a to mp4 directly

ffmpeg -f lavfi -i color=c=black:s=1280x720 -i input.m4a -shortest -fflags +shortest output.mp4

Reference

• how to convert output.mp3 to mp4 with ffmpeg?

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