[FFmpeg-user] crf mode in libvpx

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Feb 8 15:44:33 CET 2012

Boštjan Strojan <bostjan.strojan <at> gmail.com> writes:

> On Wed, Feb 8, 2012 at 9:42 AM, Carl Eugen Hoyos wrote:
> > I don't think it makes sense to combine "2-pass" with constant quality.
> I'am just a user, but i did a substantial googlet on this specific
> feature (and reading everything that was found about libvpx), one of
> the explanations that pop-up:

Yes, it indeed seems that VP8 does everything differently;-)

To answer your original question:
If you want to set the video output quality to x, use
-qmin x -qmax x

(-crf x -pass n should allow you to reach the same result 
as in your example, I did not test though.)

Carl Eugen


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