[FEATURE] use opusenc when converting convert to opus

[jaum20]

Is the feature request related to a problem. Please describe it.

I am downloading flacs from Qobuz

my cofig:

[conversion]
enabled = true
codec = "OPUS"
sampling_rate = 48000
bit_depth = 24
lossy_bitrate = 190

but all resulting files have a bitrate bellow 192.

Describe the solution you would like.

When I use opusenc --bitrate 192 file.flac the resulting bitrate is always slighlyy above 192. I would like to get opus ~192kbps using streamrip

Describe alternatives you've considered.

none