FFmpeg: passing an argument for a codec

Question

I'm using FFmpeg to convert to the iLBC format:

ffmpeg -i dream.wav -ar 8000 -b:a 15200 -acodec ilbc dream.lbc -y

The iLBC codec supports an enhance option:

enhance

Enable the enhancement of the decoded audio when set to 1. The default value is 0 (disabled).

How am I supposed to pass that option?

I can't seem to get it right, e.g.:

ffmpeg -i dream.wav -ar 8000 -b:a 15200 -acodec ilbc -enhance 1 dream.lbc -y 

No matter where I place it in the command I end up with:

Unrecognized option 'enhance'.
Error splitting the argument list: Option not found

Is there a special syntax for arguments meant for the codec?

Answer 1

That's an option for the ilbc decoder, not the encoder. For encoder specific options see ffmpeg -h encoder=ilbc.