[FFmpeg-devel] [PATCH] Change libvpx-vpx default to crf=32.

[Elliott Karpilovsky]

On Wed, Aug 28, 2019 at 3:11 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>
> Am Mi., 28. Aug. 2019 um 23:26 Uhr schrieb Elliott Karpilovsky
> <elliottk-at-google.com at ffmpeg.org>:
> >
> > Current default is 200kbps, which produces inconsistent
> > results (too high for low-res, too low for hi-res). Use
> > CRF instead, which will adapt. Affects vp8/vp9. Also
> > have VP8 use a default bitrate of 256kbps.
>
> Would it simplify the patch if -crf 0 would indicate lossless encoding?
>
> Carl Eugen


I do not believe so. I believe that there would be more code changes
to switch the checks from ctx->lossless to ctx->crf, and the code
might need to be changed to no longer accept -lossless as a flag
(unless ffmpeg is okay with there being two ways to trigger it).