[Request] Allow for running split with a jobs like flag

[kanjieater]

I'm running split and noticed it doesn't seem to allow for a --jobs flag. Is there someway to make it run faster and make full use of a users cores? I was thinking after chapters have been identified for splitting, that part could be parallelized.

Here's the command I'm running now for reference. docker run -it --rm -u $(id -u):$(id -g) -v "$FOLDER":/mnt sandreas/m4b-tool:latest split "./$INPUT"

[sandreas]

I planned that, but did never implement it. So this is indeed a feature request.