Convert Audio to Video.md

Convert audio file to video file for uploading to MS Stream, YouTube, etc.

Source:

• https://www.reddit.com/r/ffmpeg/comments/gzkrgt/convert_m4a_to_mp4_or_any_video_format_to_upload/

Install ffmpeg (on a Mac):

brew install ffmpeg --with-libvorbis --with-sdl2 --with-theora

Use ffmpeg for the conversion:

ffmpeg -i audio_input_file.m4a -c:a copy video_output_file.mp4

This works very quickly because it just wraps the audio file in a video container. Would like to eventually include a relatively simple image on every frame of the video.

Later, I had a need to do the reverse process for some files.

Use ffmpeg -i input_file.mp4 to get information on the embedded audio format.

In this case it was AAC. So, then I used: ffmpeg -i video_input_file.mp4 -vn -acodec copy copy audio_output_file.m4a
to demux it (source).