[Libav-user] Filesize difference between using ffmpeg command line and C API

Alexandre Bizeau abizeau at 36pix.com
Thu Apr 1 18:10:39 EEST 2021

Still investigating the problem, by constraining my application with
-qmin=10 -qmax=10, and doing the same using ffmpeg command line I have the
exact same bitrate and file size.

But if I just use preset=medium and crf=23 (which are normally the
default), Im don't have the exact same results between the two.

Does anyone know something that ffmpeg.c could do in extra compared to the
default parameters from libav?
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