Implement single pass RPU injection

[quietvoid]

Currently, the injection process requires multiple steps:

• Analyzing the input frames to determine where to insert RPU NALUs.
• Injecting the RPU NALUs after the last slice of every frame.

Ideally, it would do it all on the fly. Implementing this would also make a BL+EL muxer implementation a lot simpler.

[manuelrn]

Implementing this would also make a BL+EL muxer implementation a lot simpler.

Do you mean to inject a HEVC file (instead of just an RPU)? I mean combining the 2 HEVC files that a UHD Blu-ray contains to generate a HEVC with DV (BL+EL+RPU), like MakeMKV does.

That would be interesting, some time ago I thought about opening an Issue to ask if this feature could be implemented.

Thanks a lot!

[AVX22]

I mean combining the 2 HEVC files that a UHD Blu-ray contains to generate a HEVC with DV (BL+EL+RPU), like MakeMKV does.

I do not know if what @manuelrn l suggested is the same idea as yours @quietvoid but i think is a great idea. Having the ability to parse the RPU as an individual HEVC, will make the files fully compatible with Tsmuxer and will open the posibility to playback UHD Blu-ray in profile 8 DV, with all the menus and extras.

[quietvoid]

Yes that is what I meant, merging both HDR10 base layer HEVC and the enhancement layer HEVC.

[manuelrn]

Yes that is what I meant, merging both HDR10 base layer HEVC and the enhancement layer HEVC.

One thing to keep in mind: Would it be possible to do it exactly like yusesope's tool does?

I mention it because on several occasions I have seen reports from some users indicating that they have problems with the video generated by MakeMKV but with the video generated by yusesope's tool they have no problems.

Apparently MakeMKV doesn't add Access Unit Delimiters and yusesope's tool does it. And maybe there are other differences too...

[AVX22]

@manuelrn do you mean that when making a backup of a profile 7 disc with makemkv some times it gives an error? Yes, that is correct. Some times the second layer is removed or ignored when it detects a delay or a problem.

[Nico83500]

I hope it will be implemented too ! Thanks quietvoid !

[Nico83500]

I think he talks about the issue with LG WebOS (and perhaps other device). Trigger to DoVi doesn't work with MakeMKV output but it works with yusesope's tool.

[Nico83500]

@quietvoid If you are working on it and want someone to test it, I can do that ;)

[AVX22]

Me too. I can test on multiple devices such as Oppo, Shield, Zidoo, Dune etc

[quietvoid]

I have not had the time to work on it.

[Nico83500]

No problem, I use yusesope's tool but it would be easier to get one tool for all :)

[AVX22]

I have not had the time to work on it.

Its ok! There is no rush ;)

[quietvoid]

I'm not going to implement this feature, because it's not feasible to be accurate for all files. The order of the frames is not always available at the moment the frame is parsed.

So injection will stay as a 2 pass process.

[Nico83500]

Thanks for the info. So you will not implement BL + EL streams merging too ? Thanks !

[quietvoid]

That's not what I said.

[Nico83500]

OK great, thanks, because it was one of the points in this issue too ;)