[FFmpeg-user] request for review: feature request of "disallow unallowed bitrates"

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Jul 27 20:10:16 CEST 2012

Roger Pack <rogerdpack2 <at> gmail.com> writes:

> $ ffmpeg -i in.mp3 -b:a 40000k out.mp3
> (it ends up writing it as a 320 Kb/s audio bitrate--not the specified
> "impossible" number).
> Similarly.
> $ ffmpeg -i in.mp3 -b:a 310k out.mp3
> seemingly "magically" produces a file with 320 Kb/s bitrate--not 310)
> So I was thinking of filing a trac with a request to at least "warn"
> when it ends up picking some bitrate other than that specified.
> Any feedback before I do so?

How should FFmpeg know that (the installed version of) lame 
will not encode the requested bit-rate?

Carl Eugen

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