SmallHD 501 color shift when using "Crop & Scale" tool

[Jannik Tesch]

Hi community,

I got a problem with my SmallHD 501 (Rec.709 Gamma 2.4, no LUT, no change in RGB values, PageOS 4.8.6).

When I use the "Crop & Scale" tool, the colors shift at the moment I activate the tool. When I deactivate the tool, the colors shift back. It is a rather small shift, but still clearly noticeable to the eye. Example video: https://vimeo.com/janniktesch/501

I testet it with with different video inputs and the bug is reproducible on each of them. The official support tried for weeks to help, but have no solution. So maybe one of you has had this problem and has solved it?

Thanks in advance.

Jannik

[Gabriel Devereux]

There is a quote (I believe from Toby Tomkins).

We live in a world where a computers scaling algorithm impacts colour more than a colourist nuance...

Is the colour shift constant throughout scaling from 99% to 1%? If its constant its a software bug - if it shifts sporadically (IE not a constant) then its potentially a signal path / hardware issue that requires software compensation.

G

 

[Jannik Tesch]

Hi Gabriel,

somehow I was not notified about your reply, sorry, I am just reading it right now.

The shift was constant. I say "was" because with the latest firmware update (PageOS 5.1.1) the bug is now gone! ?