Using ffmpeg to reduce background noise

Scenario:

I have a file I recorded. It has background noise I want to remove (fans, clicking, etc.) Works good for fans but a little less well for clicking.

1. Extract the audio file from the video

ffmpeg -i <path> -vn -acodec copy output-audio.aac

2. Pipe it through a rnn model.

ffmpeg -i <audiopath> -af arnndn=<path to model>

For path to model I just downloaded the std model from https://github.com/GregorR/rnnoise-models

3. Recombine the new audio with the video

ffmpeg -i v.mp4 -i a.wav -c:v copy -map 0:v:0 -map 1:a:0 new.mp4