[FFmpeg-devel] [PATCH] avfilter: add zoneplate video source filter

[Paul B Mahol]

On Wed, May 10, 2023 at 2:50 PM Michael Koch <astroelectronic at t-online.de>
wrote:

> Well, I can't see how it looks now, but the sequence white - gray -
> white (which is impossible in a sine wave) should no longer be there,
> because cos(x) = cos(-x).
>

This is not caused by sin() but because video is full range yuv but
interpreted as limited.