Change encode quality settings

I was wondering if there is anyway to increase the encode quality of the flv files, in both video and audio. I would really like to be able to encode at 400kps and audio at 32000hz.

I tried modifying the command line for ffmpeg: -i @input -f flv -acodec mp3 -ar 22050 -ab 64k -ac 1 @output

to: -i @input -f flv -acodec mp3 -ar 32000 -ab 400k -ac 1 @output

but nothing transcoded after I made those settings....