I am using the videoscope on the timeline and the improvements are most welcome, especially the vectorscope which is now much more easily readable. However the colours have rotated about 45 degrees anticlockwise, putting, for example, green where cyan is expected and magenta where red normally is. Perfectly useable, just a bit odd, a bit like the old Cin-CV vectorscope.
The Vectorwheel has allowed me to identify a problem with my colour correction, which turns out to be a glitch in the Histograms.
Using either Histogram to set black and white points prior to setting saturation, I find excess blue showing on the scope and the red/yellow shows decreased levels i. e. the colour balance is skewed towards blue. Resetting Histogram centres it again. My attempts to rebalance it have failed. It is not a scope fault as if I use Colour3Way it does not happen.
I can go back as far as 20190531 to see if it is there if you like, I can also attach screenshots. Again, if you like.
First GG will look at it tomorrow and will let you know if more information is needed.
Please, could you take a screenshot? I don't have "blue shift" in my test, but I don't think I understand the problem. Have you tried Histogram or Histogram Bezier?
Tried both histograms, same with each. Histogram reset first, then I am simply setting black and white points and correcting exposure in Value after applying the BT709 LUT but before saturation etc.
We are totally stuck and do not like to leave possible bugs out there. Some effort has been made to understand the problem by a couple of people to include gg. To determine if there is a fixable problem, more detailed information is probably needed but if you are not concerned about a fix and do not have time for this, that is OK too.
Some additional helpful information may be:
- add HistogramRGB and WaveformRGB in Videoscope tool which have more info
- a video screencast creating the issue shown
Igor Beg had the following to say: "Color3Way and Histogram (and Histogram Bezier) are different tools. I think, you can not compare the two tools. Histogram changes more parameters with an only touch: Contrast, Saturation, and Luminance. Sometimes it is better to change the values of the three channels (Red, Green, Blue) separately than change only the Value channel.The Value parameter in Histogram do not change only the luminance."
Is is possible that there is some confusion about it changing more than the luminance?
Well, I guess we are done here -- at least for now. It is still somewhat of a mystery and I suspect there is still some kind of color problem somewhere and it will be back later.
Please continue to report an anomalies so we at least are aware of potential problems.