[FFmpeg-user] feature request: warn when video bitrate ignored

[Roger Pack]

Hello.
Some people get confused when the following occurs--they enter a video
bitrate, but it is seemingly ignored:

ffmpeg -i input  -b:v 200k output

I suppose they're just missing a "bufsize" option, for 1 pass encoding.
Would it be possible to fail it if it ignores parameters like this? Or
warn? or fail with a warning (better yet)?
Just wondering.
Thank you.
-roger-