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

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Mar 16 16:00:38 CET 2013

Nicolas George <nicolas.george <at> normalesup.org> writes:

> 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.

I don't think this makes the request to map q to crf invalid though.

Or do you disagree?

Carl Eugen

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