Dolby Vision

Post by **davilla** » 07 Jul 2019, 16:04

I gather everything is fine with Dolby Vision ?

Morten1969 · Post by **Morten1969** » 07 Jul 2019, 17:25

After i put my movies on nas everything is working perfect. Subtitles works and picture is perfect.

I have watch 2 complete movies

Grencola · Post by **Grencola** » 07 Jul 2019, 20:36

so I've tried basically every program I could find to demux these mp4's (and LG DV .ts demos also), but nothing keeps dolby vision attached to the video track, it just becomes hdr10. it's as if, during muxing, dvhe writes the Metadata directly to the specified container (.ts or .mp4) only, so there's no way pull out a video track with any dv. seems the best chance of getting dv with hd-audio in MrMC is to either get DVDFab to make a ts.dolbyvision profile instead of MP4, where we can then just swap out the audio track, or wait for the Matroska team to push an mkv update with dvhe support.

Post by **davilla** » 08 Jul 2019, 13:18

Grencola wrote: 07 Jul 2019, 20:36 so I've tried basically every program I could find to demux these mp4's (and LG DV .ts demos also), but nothing keeps dolby vision attached to the video track, it just becomes hdr10. it's as if, during muxing, dvhe writes the Metadata directly to the specified container (.ts or .mp4) only, so there's no way pull out a video track with any dv. seems the best chance of getting dv with hd-audio in MrMC is to either get DVDFab to make a ts.dolbyvision profile instead of MP4, where we can then just swap out the audio track, or wait for the Matroska team to push an mkv update with dvhe support.

One possible issue I noticed is video stream is a byte stream instead of a bit stream. MP4's are always bit stream formatted. Could be that this is confusing demuxers that expect mp4's to contain bit stream format.

Grencola · Post by **Grencola** » 08 Jul 2019, 13:39

davilla wrote: 08 Jul 2019, 13:18 One possible issue I noticed is video stream is a byte stream instead of a bit stream. MP4's are always bit stream formatted. Could be that this is confusing demuxers that expect mp4's to contain bit stream format.

Interesting, so the .ts and .mp4 samples here: https://drive.google.com/folderview?id= ... acOoHuHS9v must be bytestream as well then? They do the exact same thing when demuxed. The only retainable DV Metadata is the second layer 1080p dv track from uhd discs. But there are no public tools to convert it to a binary encoded RPU file to hardcode it directly onto the elementary track using x265's new --dolby-vision-rpu option.

Post by **davilla** » 08 Jul 2019, 15:29

ts for h264/h265 is byte stream. The difference is how sps/pps/vps are handled. That is for byte, they are embedded in stream. For bit, they are in 'extradata'.

Grencola · Post by **Grencola** » 08 Jul 2019, 19:13

davilla wrote: 08 Jul 2019, 15:29 ts for h264/h265 is byte stream. The difference is how sps/pps/vps are handled. That is for byte, they are embedded in stream. For bit, they are in 'extradata'.

Ah k that makes sense. I wish there was better software available to handle this stuff

wesk05 · Post by **wesk05** » 13 Jul 2019, 17:02

From the horse's mouth:
https://forum.dvdfab.cn/forum/uhd-copy- ... post370046

Grencola · Post by **Grencola** » 13 Jul 2019, 21:59

wesk05 wrote: 13 Jul 2019, 17:02 From the horse's mouth:
https://forum.dvdfab.cn/forum/uhd-copy- ... post370046

Below is from Dev Guy,
Single stream is BL+RPU,
Two Stream is Main Stream HDR10 video, Second Stream EL+RPU
And Dolby Vision is in RPU, Both will have Dolby Vision.

Single Stream not have EL for now. It is not Dolby Vision, it some info for HDR10 to 12bit .
Mp4 container not have such mode as in Dolby Demo files for now.

his English isn't the best, but I take it the single layer mp4 dvdfab makes is NOT dolby vision? it just contains some rpu info to flag the logo lol? or did I read this wrong?

mulucy_ma · Post by **mulucy_ma** » 14 Jul 2019, 02:52

Grencola wrote: 13 Jul 2019, 21:59
wesk05 wrote: 13 Jul 2019, 17:02 From the horse's mouth:
https://forum.dvdfab.cn/forum/uhd-copy- ... post370046

Below is from Dev Guy,
Single stream is BL+RPU,
Two Stream is Main Stream HDR10 video, Second Stream EL+RPU
And Dolby Vision is in RPU, Both will have Dolby Vision.

Single Stream not have EL for now. It is not Dolby Vision, it some info for HDR10 to 12bit .
Mp4 container not have such mode as in Dolby Demo files for now.
his English isn't the best, but I take it the single layer mp4 dvdfab makes is NOT dolby vision? it just contains some rpu info to flag the logo lol? or did I read this wrong?

I think you misunderstood ( I misread it too, his English is not that bad

). RPU contains Dolby Vision information to adjust the brightness and darkness scene-by-scene or frame-by-frame. The EL itself is not Dolby Vision ( sort of it is ), the primary purpose of it is to make 10-bit HDR10 12-bit, but no modern TV supports 12-bit lol, but it looks better since TVs downscale* it ( I hope it's a correct term ), like 4K downscaled to 1080p vs. 1080p source analogy, the former should look better at least in theory.
BTW, it would be great to get a testflight for the beta version if it's possible.

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