[FFmpeg-user] Why isn't "-q:v <value>" mapped to "-x264opts crf=<value>"?

Nicolas George nicolas.george at normalesup.org
Sat Mar 16 11:09:42 CET 2013

Le sextidi 26 ventôse, an CCXXI, Teemu Likonen a écrit :
> It seems that with most codecs we can use "-q <value>" option to define
> constant quality encoding.

That is a common misconception. -q means constant quantizer, not constant
quality; most codec do not have a constant quality encoding, constant
quantizer is one of the best approximation but not the same.


  Nicolas George
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