Is it possible to normalise the audio also with this?

[simcc]

Or would I need to do that first with loudnorm or https://github.com/slhck/ffmpeg-normalize etc.

[bennetimo]

Hi, I'm not familiar with that project but it looks it works by building up a filter command using the ffmpeg loudnorm filter.

shrinkwrap does support passing any arbitrary options to ffmpeg using the --fmpeg-opts k1=v1,k2=v2 syntax. So if you could achieve what you wanted using those additional options and constructing the relevant loudnorm command manually it might work, but the syntax might get a little clunky; the original intention was for a few simpler KV options/flags. So YMMV :)

Perhaps if it's possible you could get the ffmpeg-normalize to output/log the raw ffmpeg command it's using and go from there.