Andrew, Pierre: After some testing, I checked into GIT Andrew's waveform mod to add the additional IRE 92.2% + 6.3% lines for the waveform. Interesting discussion - past and present.
> I had forgotten all this complexity and the multiple distinctions > > between the IRE values that only concern analog video and the Waveform > > monitor (VideoScope) of Cinelerra-GG which only calculates % of the > > digital 0-255 scale. > > > > It's not easy to understand that a YCbCr source image (16-235) > > corresponds to 6.3-92% on the Waveform grid, especially since there are > > no visual cues on the grid to indicate this and to show the video level > > overruns that could cause problems depending on the destination of the > > editing ... > > I added (by trial and error!) those two lines ... they assume > WAVEFORM_DIVISIONS 12 > > but I guess they only valid for some types of footage and some setting of > mpeg/jpeg toggle .... > >
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