Feature request: new flag bitare as input file

Hi i have simply request - i think - to add flags:
 -sbai soft bitare as input
and
-bai bitare as input

Ffmpeg2theora will simply read avarge biatare from source file and put in conversion.
Something like this
file_input.mkv has 800 Kb/ps for video and 160 Kb/ps for audio so reencoder read this variables and put:
ffmpeg2theora -V --soft-target 800 -A 160 file_input.mkv
or
ffmpeg2theora -V 800 -A 160 file_input.mkv

And second request when input file have only one subtitles stream i wish this tool mark this as default (so i don't need select whenever I playing file).

thanks for your hard work.