Of course. But visually lossless quality transcoding is possible. If it's advantageous to visually losslessly convert Blu-ray remuxes to IPTPQc2, why wouldn't you?
IPTPQc2 is better when it's encoded straight from the 12bit master. The colorspace is more efficient and retains more color information which in the end is the equivalent of 11.5bits YCbCr(exceeding our tv capabilities btw).
There's no point/benefit in going from 10bit YUV to IPTPQc2.
Do you/we have any idea why they're doing this?
Is it better to just watch in HDR instead of DV for movies with FEL expansion if a FEL compatible player isn't an option?
Would it be possible to re-write the L1/L2 metadata so it's corrected/"unexpanded"?
4 options:
1- just watch in HDR10
2- bake the EL into the BL
3- generate a proper RPU in resolve for the BL actual brightness.
4- get a proper player
Expanding the brightness makes sense actually. It futureproofs the grade for when the TV will be brighter and it makes the content accurate on more type(brightness, HDR format) of display.
Because this way, people with brighter DV TV(G3) can enjoy brighter HDR and people with low nits DV TV can also get an accurate picture thanks to the trim pass and L1.
Then, people with HDR10-only TVs (low nits) can also get an accurate image with the 1000nits BL. If the BL was as bright as the EL, then those low-nits HDR10 TVs would look bad/clipped.
On top of that, we also have titles where the Base Layer was poorly authored resulting in a lot of compression artifacts and other issues that are only fixed with the FEL layer. Typical examples are Total Recall, Halloween 2 and a few others.
Aside from the time/effort involved. Is there a downside to doing this and/or anything you miss out on or that could be improved upon further from your tutorial?
Also, what would it take to analyze for multiple trims or does it already do this? Have you ever attempted this?
Also, I followed the guide and generated this for The Super Mario Bros (2023):
Aside from the time/effort involved. Is there a downside to doing this and/or anything you miss out on or that could be improved upon further from your tutorial?
The only thing I don't do in the video is the project image scaling. I found out that if you set your project to 1080p with cubic algo, it produces much better metadata that are almost identical to the original. https://ibb.co/r2tMX6n
Also, what would it take to analyze for multiple trims or does it already do this? Have you ever attempted this?
Your project set to CMV4.0 will produce L2 trims. My script by default, will remove them as explained recently in this thread.
