[FFmpeg-user] ffserver with libvpx-vp9 problem

Moritz Barsnick barsnick at gmx.net
Thu Mar 31 21:20:44 CEST 2016


On Thu, Mar 31, 2016 at 19:48:29 +0200, Cley Faye wrote:
> About that, I can enlighten you: "-b:v 0" ‚Äčis used for Constant Quality
> encoding for vp9; it works with -crf to determine the "visual quality" of
> the video. Setting both -b:v and -crf result in constrained quality (like
> constant quality with a maximum bitrate value).

Very interesting, thanks for clarifying. I was wondering whether this
should be in the (texi) docs, but encoding with libvpx is already
complicated enough. ;-) The wiki

> A good read on this: https://trac.ffmpeg.org/wiki/Encode/VP9

is probably fine.

Moritz


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