Dolby Vision now possible through MP4 Mux.

[LV8HD]

@RESET_9999 in the most recent update you introduced the possibility to measure brightness of an HDR10 video on a frame-by-frame basis, which, to me, seems the most correct approach. Does this mean the MadVR method is less accurate even with excluded letterboxes? does it work on a scene-by-scene basis?

good catch haha. I didn't mention it in the release note because it's soooooo slow that it's unusable. I practically wasted my time on this code but it is indeed a frame by frame analysis / plotting. It uses the same script that generates the maxcll/fall stats in (7-2) (7-1).

Madvr analysis is also frame by frame but because I use Dovi_tool to plot the data, the graph is shot by shot. It's still 100% accurate but the values are rounded shot by shot. MadVR overall should be more accurate too since it measure pixels perceptually while the other script just measures the pixels as they are without any restriction.

I see. Correct me if I'm wrong. MadVR measures pixels using perceptual quantization while the other script the raw data?

[RESET_9999]

right

[LV8HD]

@RESET_9999 pushed by curiosity I decided to check what the fastest method of measuring HDR with excluded letterboxes was on my PC (MKV measurement vs. Cropped ProRes measurement). The winner ended up being MKV although I have a good CPU (AMD Ryzen 7 7700x), but that's not the point.

As soon as both measurements were done (same movie) I took a look at them expecting to see the same results, however, they differed of a couple of nits. Why is that?

MKV measurement


ProRes measurement

[RESET_9999]

prores encode probably change the grain structure a little bit so small variation like that is normal

The winner ended up being MKV although I have a good CPU (AMD Ryzen 7 7700x), but that's not the point.

Thats surprising. On my i9 13900ks it's almost two times faster with prores.

[daffie]

reset_9999, how did you find the PQ of the tenant with cm4.0?

Hi, how do you watch ''with cm4.0'' ?
By using the CPM build with the AM6B+ ?

[TheEqualizer]

maybe, I dont know. You can also demux with tsmuxer

I've done all sorts of tests with this German edition of the movie "Late Night with the Devil". I used mkvtoolnix, dovi_script, DGDemux, MakeMKV, the first three have a similar output, the last one does not output correctly, but if you compare the scene-cuts of all the options, but they do not match the scene-cuts of the EL layer extracted using tsMuxeR, does this mean that technically remux mkv 7Profile is not allowed?

EL_scene-cuts

MKVToolNix_DoVi-Script_DGDemux_scene-cuts

https://i.ibb.co/KrX9cbG/EL-PLOT.png
https://i.ibb.co/VBs1t5h/ST-DL-PLOT.png

[RESET_9999]

I dont know. I watched this one in Profile 8 without EL and everything was fine.

[TheEqualizer]

I dont know. I watched this one in Profile 8 without EL and everything was fine.

I'll tell you more, those who have already watched the remux in mkv 7p also did not see anything suspicious, so in the question I pointed out that technically it is still not correct and it is not allowed to make such remuxs. Perhaps if a British UHD appears, things will be better on it.

[RESET_9999]

i dont know but my p8 remux is perfectly in sync with the BL scene cuts

[RESET_9999]

so in the question I pointed out that technically it is still not correct and it is not allowed to make such remuxs. Perhaps

I had another look at this movie and indeed a P7 mux with dovi_tool or mkvtoolnix is still wrong.
The RPU extracted from tsmuxer demuxed hevc is fine though so a P8 rip works.

[valington]

so in the question I pointed out that technically it is still not correct and it is not allowed to make such remuxs. Perhaps

I had another look at this movie and indeed a P7 mux with dovi_tool or mkvtoolnix is still wrong.
The RPU extracted from tsmuxer demuxed hevc is fine though so a P8 rip works.

maybe try to do this film in TS container and it will be proper in ts muxer

[RESET_9999]

maybe try to do this film in TS container and it will be proper in ts muxer

tsmuxer doesn't support ST-DL authoring.
anyway the problem is the EL and german discs

[daffie]

so in the question I pointed out that technically it is still not correct and it is not allowed to make such remuxs. Perhaps

I had another look at this movie and indeed a P7 mux with dovi_tool or mkvtoolnix is still wrong.
The RPU extracted from tsmuxer demuxed hevc is fine though so a P8 rip works.

I have a profile 7 mkv of this movie - is there a way to make a P8 rip from it while keep all the EL data ?
Not with this German disc I guess?

[RESET_9999]

I have a profile 7 mkv of this movie - is there a way to make a P8 rip from it while keep all the EL data ?
Not with this German disc I guess?

Remove the EL and inject this RPU:
https://drive.google.com/file/d/1urqjRi ... drive_link

[daffie]

I have a profile 7 mkv of this movie - is there a way to make a P8 rip from it while keep all the EL data ?
Not with this German disc I guess?

Remove the EL and inject this RPU:
https://drive.google.com/file/d/1urqjRi ... drive_link

Thanks for your help!
Do I need to use workflow 4-1 for this?