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18th December 2018, 13:33 | #1 | Link |
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HDR10+ General Discussion
As some of you may already know, the first UHD disc's encoded with HDR10+ have been released.
Currently only the newest Panasonic and Samsung devices support this version of 'dynamic' HDR, with the OPPO UDP-20x range of players and its clones to follow. However, a guy over on the AVS forum has managed to back-up two of the new HDR10+ disc releases but has encountered an interesting issue that requires more analysis, help and feed-back from others. Long story short, when the (HEVC/HDR10+).m2ts file is accessed/played outside its original UHD disc folder-set, not only is the HDR10+ meta-data/flag lost, the basic HDR10 information is lost too. Meaning no HDR at all. And, re-muxing the HEVC/HDR10+ elementary video stream into the MKV container does not work either Can anybody here offer any help?
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18th December 2018, 14:59 | #2 | Link |
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Which titles use HDR10+? AVSforum didnt seem to say.
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18th December 2018, 15:22 | #3 | Link |
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Not many...
Here's a link to the current/proposed movies: List of UHDs that contain HDR10+ Cheers and thanks for your interest...
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18th December 2018, 15:30 | #4 | Link |
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Since HDR10+ wasn't in the original spec, how do they achieve backwards-compability? Or do all UltraHD Blu-Ray players receive firmware updates for it (not that many players exist)? Maybe the movie is stored twice, e.g. one SDR and one HDR10+ version and the remuxing software accesses the SDR one?
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18th December 2018, 15:50 | #5 | Link |
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Specs evolve over time. They may just have two discs in the package, like some 3D movies. The 3D disc never played on non-3D players, they just had to use the other one.
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19th December 2018, 10:09 | #6 | Link | |
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19th December 2018, 19:51 | #7 | Link | |
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21st December 2018, 10:21 | #8 | Link |
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I see. I wasn't sure what OP meant by "Meaning no HDR at all". Guess he meant the metadata was lost but the encoding is HDR (i.e. you see the washed out colors).
But if all the metadata is simply in SEI messages it would be unusual for muxers to drop them. |
21st December 2018, 13:21 | #9 | Link |
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I got my hands on one of those discs, and just playing the straight up m2ts file produces proper HDR10 playback. So if ripping to MKV screws that up, then the ripping tool removed something it was not meant to.
I'll peek at the HDR10+ metadata later. The only odd thing is that the disc claims to be 60GB in size, but the main m2ts is just 22GB, I wonder if something is wrong with the decryption or reading of the disc. But the movie seems to be all there regardless. Its only 46 minutes (A Beautiful Planet documentary), so maybe the 60GB is just a fluke in being the max size it could be.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 21st December 2018 at 13:25. |
21st December 2018, 13:57 | #10 | Link | ||
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Quote:
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Perhaps, Mosu's Matroska muxer is able to do a better job. I have found this to be the case with regular Blu-ray and UHD disc back-ups!
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21st December 2018, 17:01 | #11 | Link |
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A MakeMKV MKV file of that disc also preserves the HDR10 charecteristics.
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21st December 2018, 17:14 | #12 | Link |
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Really... Does it trigger the HDR10 flag in your hardware player and/or supporting TV?
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21st December 2018, 17:16 | #13 | Link |
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I don't have such a thing. But my software PC player still reports full HDR just like normal. Hardware playback failure can have a million reasons.
But clearly enough data is preserved to indicate its at least HDR10.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 21st December 2018 at 17:20. |
21st December 2018, 17:23 | #14 | Link | |
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Which HDR10+ disc did you end up purchasing Nev, so I can buy the same one? In the meantime... Are you able to post a short MKV and/or M2TS sample?
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7th January 2019, 18:11 | #15 | Link |
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I finally got around to looking at the metadata (well a couple days ago actually), and the .mkv rip from MakeMKV does also contain the HDR10+ SEI metadata. So its all there. If some player cannot play that in HDR10 or HDR10+, then its entirely up to the player.
PS: I got the A Beautiful Planet documentary, as mentioned above already.
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7th January 2019, 22:16 | #16 | Link | |
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I recently purchased 'A Beautiful Planet' too (via Amazon UK). It's currently on its way from the US of A
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7th January 2019, 22:22 | #17 | Link | |
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8th January 2019, 16:12 | #18 | Link |
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I wonder if MKV muxer that MakeMKV GUI uses is doing something weird?!
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8th January 2019, 17:01 | #19 | Link | |
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Looks like we're getting a bit closer...
A new AVS forum member, going by the name avsforum2 has just posted the following: - Quote:
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