Dolby Vision now possible through MP4 Mux.

[dkangel]

Thanks for explaining. How to interpret those? Is the madvr plot the best, because it has the most dynamics?
If I do the madvr measuremnt, I adjust cmv4.0 when I generate from madvr file with dovi_tool ,e.g.

No, madvr generated metadata (3-2) is the worst and not really suited for DV playback. Also, Madvr scene cut detection is not very good. It's quite sensitive to flashes/explosions/fast movement and can sometimes miss obvious scene cuts. The best dv metadata generation is one of the analysis tunings using Davinci Resolve. I prefer the ''balanced tuning'' which is the dovi_scripts default in workflow 3-1


Hello
in your video you said that we should choose most highlights details in resolve but now i see that you prefer balanced. So what is the best ?

[RESET_9999]

Yeah, when I did the video, I was using tuning 1.
After more tests/comparisons, I now prefer tuning 3 because it's a bit brighter without clipping. Both tunings are good though and tuning 3(balanced) is Resolve default.

[dkangel]

ok thank you

[powdeau]

Does Chroma Weight makes a big difference if it is used only in 100 nits trim?

[RESET_9999]

Does Chroma Weight makes a big difference if it is used only in 100 nits trim?

yes and it doesn't matter if it's only a 100nits trim because whatever they did in the SDR trim gets extrapolated to any brightness.
thankfully CW is not used very often.

[darrrkmanxxx]

Does Chroma Weight makes a big difference if it is used only in 100 nits trim?

yes and it doesn't matter if it's only a 100nits trim because whatever they did in the SDR trim gets extrapolated to any brightness.
thankfully CW is not used very often.

so if there are no CW trims (flat line) at 1000nits and my device has 1000nits peak brightness, will it still be tone mapped because of the 100nit trim?

[RESET_9999]

so if there are no CW trims (flat line) at 1000nits and my device has 1000nits peak brightness, will it still be tone mapped because of the 100nit trim?

If there's a blank 1000nits trim, the 100nits trim gets ignored if your target brightness is 1000+
If there's a blank 600nits trim, the 100nits trim gets ignored if your target brightness is 600+

if there's just a 100-nits trim, yes the metadata gets extrapolated to any brightness but the higher your TV target is the less effect the trims have.
if you're using LLDV, and if you use an edid of 1000+ then the trims are 100% ignored if the RPU MDL is 1000nits (tested on shield, ATV, ugoos, x800m2 x700).

@powdeau confirmed to me that the trims are not ignored in TV-LED on the LG G4 with 1000nits RPU, so the behavior is different than LLDV because that TV must have a target higher than 1000nits.
I see the same behavior with my 2000nits Hisense TV, the trims always work regardless of the RPU MDL. So the trims not working in LLDV with 1000nits edid might be another DV bug.

He also confirmed that Chroma Weight doesn't work in cmv2.9 on the G4, same as my C2 and hisense TV. So dolby cmv4.0 fixed the Chroma Weight bug in LLDV and broke it in TV-LED for cmv2.9... typical Dolby...