audio bitrate variable

[Alexx23]

Is your feature request related to a problem? Please describe

It would be helpful to have a variable that allows you to define the audio quality (bitrate).
I've seen the code and the current bitrate is 128kbps, this should be able to change to the programmer's taste, because with that bitrate, the audio can weigh too much.

Describe the solution you'd like

The solution I had thought of is to add the variable 'bitrate-audio' inside .

[antoine92190]

Feel free to send a PR if you are in a rush.
I would rather name the prop audio-bitrate as a number.

[Alexx23]

Many thanks.
Yes, I think it's fine to be a number.

[antoine92190]

audio-bit-rate and audio-sample-rate props added in 6d8a013