Saturation with luminance in waveform window

[Rafael Amador]

Hi Stephen,
Sorry I haven’t post you.
Can you send me an e-mail to nagavision at nagavideo dot com?
Rafael

http://www.nagavideo.com

[Rafael Amador]

[Stephen de Vere] “By playing around I’ve narrowed the problem down within the Broadcast Safe filter to the ‘Saturation Limiting’ control.
‘Luminance Limiting’ seems to not have the effect. “
The Luma and saturation slides only works in Custom mode.
If you go to 8b instead of 10 you will notice that in the Waveform and in The Histogram.
But you are not using the CC (No 3-W)?
I’ve never used that filter but I think is 8b RGB. That should clip any Luma Higher than 100% and any illegal RGB value.
Rafael

http://www.nagavideo.com

[Stephen De vere]

I see now that filters is the only way to hope to achieve Broadcast Safe master, and that all the scopes windows are just rough guide.

I plan now to put Broadcast Safe filter and a Levels filter to remove sub-blacks, hoping the apparent truncating of bits is not for real on final output.

[Stephen De vere]

Rafael,

I first graded the film with 3-way CC (and some others of course). It took me weeks to complete. Then to my absolute horror I noticed the bit-truncation apparent in the histogram, a tool I only opened by chance (I only ever histogram in stills cameras because there is nothing else). I then started to do the whole job over again using the 1-way CC to replace the 3-way corrections. Now it seems the 3-way CC in fact is fine

I hope you are not suggesting that the one-way CC filter is 8b RGB only and it should not be used in my 10-bit timeline ?