How to convert .raw audio input to .m4a with ffmpeg?

Question

I have this ffmpeg command:

ffmpeg -i testing.m4a -acodec pcm_s16le -f rawvideo tentative.raw

I'd like to know the command to convert tentative.raw back to testing.m4a.

Answer 1

I just found a way of doing it.

ffmpeg -f s16le -sample_rate 16000 -channels 2 -i tentative.raw -c:a aac testing.m4a

If your ffmpeg is outdated you may need to add -strict experimental to encode with the native FFmpeg AAC encoder (-c:a aac).