Dolby Vision now possible through MP4 Mux.

[ragico]

I did a few DV mp4 single layer using Dvd Fab with ac3 soundtrack.
I played them using the amazon firestick 4k and emby app for this device. Emby server running on my nas.
Some of these mp4 play normally, others (like spiderman homecoming, The Secret Life of Pets 2 , Game of Thrones seasons 1 and 8 etc) play only audio and black screen. Tv used Panasonic gx serie.
Then I tested the firestick 4k on Lg C8 and had same results.
Therefore I think that the firestick 4K for some unknown (to me) reason do not reproduce video from all the DV mp4 single layer, but just some of them.
Same results using plex (latest beta).
Anyone knows why?

[Angryunibrow]

Anybody here could explain the differences in the output produced by Dual Layer (profile 7) and Single Layer (profile 5) Dolby Vision?

I've tried to find technical details about it and couldn't find.

The thing is:

If I take a disc and remux it in Dual layer & single layer, would they look exactly the same? Or does the Dual Layer have better quality?

I've noticed that single layer .mp4s result in smaller size than dual layer ones, so I wonder where those extra GB are going.

I asked this question on there forum, and was told its the difference between 12bit (dual layer) and 10bit (single layer).
This is the file size difference.

DVDFab makes the single layer files 10Bit which is all you can watch anyways - I do not think there are any 12bit TVs on the market.

[DaMacFunkin]

I don’t think it does make the file 10 bit, if you set the shield to 10 bit it won’t trigger DV, all DV capable TVs will accept a 12 bit signal and dither to the native display, the difference in file size is that both streams are interleaved rather than parallel I would say.

[hydrad]

I don’t think it does make the file 10 bit, if you set the shield to 10 bit it won’t trigger DV, all DV capable TVs will accept a 12 bit signal and dither to the native display, the difference in file size is that bothered streams are interleaved rather than parallel I would say.

IMO, what you say doesn't explain if the otuput quality is inferior to the dual layer technique. Some information that the original source has is lost when creating the single layer .mp4.

[DaMacFunkin]

Who says it does? My LG oled will play either dual layer or single layer from the inbuilt Plex app, I’ve done dual layer and single layer rips of Fate of the Furious, Jurassic world fallen kingdom and Casino Royale and I really cant see any difference, and I really do have a critical eye, I’m quite prepared to get my meter out and do some measurements in cromapure if you don’t believe me.
FYI DVDfab doesn’t even seem to support dual layer ripping in the latest release.

[baker99]

Strange. My files are all in sync. Perhaps both the Shield and the AVR introduce a hardware delay.
I inserted in the code the possibility to increase ("plus" button) or reduce ("minus" button) the delay of the video towards the audio. You can view the delay value in the DEBUG window. Each time you click on the two buttons you increase/decrease the video delay by 50ms.

The time delay is really handy, there's one minor issue, it doesn't show when watching anything with black borders but in full screen there is a band along the top of the screen, it's semi-transparent like the debug info background. I'ts not there in other video players.

crop20191130_125643.jpg (216.3 KiB) Viewed 21844 times

[jesper1994]

edit

[jesper1994]

I did a few DV mp4 single layer using Dvd Fab with ac3 soundtrack.
I played them using the amazon firestick 4k and emby app for this device. Emby server running on my nas.
Some of these mp4 play normally, others (like spiderman homecoming, The Secret Life of Pets 2 , Game of Thrones seasons 1 and 8 etc) play only audio and black screen. Tv used Panasonic gx serie.
Then I tested the firestick 4k on Lg C8 and had same results.
Therefore I think that the firestick 4K for some unknown (to me) reason do not reproduce video from all the DV mp4 single layer, but just some of them.
Same results using plex (latest beta).
Anyone knows why?

Same problem for me. I have sound, dolby vision is triggered however black screen on firestick 4K LG C7. Which mp4 did play normal, so i can check if i am making a mistake?

[agentreza]

it's the new Plex player. Once i switched back to the classic player, video issues went away with single layer samples.

[ragico]

I did a few DV mp4 single layer using Dvd Fab with ac3 soundtrack.
I played them using the amazon firestick 4k and emby app for this device. Emby server running on my nas.
Some of these mp4 play normally, others (like spiderman homecoming, The Secret Life of Pets 2 , Game of Thrones seasons 1 and 8 etc) play only audio and black screen. Tv used Panasonic gx serie.
Then I tested the firestick 4k on Lg C8 and had same results.
Therefore I think that the firestick 4K for some unknown (to me) reason do not reproduce video from all the DV mp4 single layer, but just some of them.
Same results using plex (latest beta).
Anyone knows why?

Same problem for me. I have sound, dolby vision is triggered however black screen on firestick 4K LG C7. Which mp4 did play normal, so i can check if i am making a mistake?

For instance,spiderman far from home, casino royale, spectre play normally, while spiderman homecoming, shining, rocketman and others only play audio with black screen both in emby and plex apps for firestick 4k. I have no other device to test eg the ATV 4K.
My believe , supported by what I see in my Lg C8 is that the "true" Dolby Vision is the single layer version. Imho the double version adopted in bluray discs is due to compatibility necessity. In other words if you play a DV disc on a non DV system, you get the hdr version. If you play a single layer DV on an incompatible system you only get audio and a nice steady pic on the display.
I am aware that my opinion is not a technical one, but is perfectly logic.
I posted the "black screen" problem arising from some single layer DV in other forums (amazon and emby) and got no reply from nobody.
I dont think I am the only person experiencing this problem but also here nobody replies.

[DaMacFunkin]

Can you double check these files? Is it possible you have done dual layer rips by accident?
All the single layer rips I have done with ac3 audio or DTS-HD play fine via shield pro 2019 and Plex or Plex directly on to LG C7 / C9.
The only file I have had a problem with is Gladiator, for some reason there are errors at the beginning of the mux, I have ripped it many times and still the same, if I can get past the studio logo it plays fine.

[ragico]

Can you double check these files? Is it possible you have done dual layer rips by accident?
All the single layer rips I have done with ac3 audio or DTS-HD play fine via shield pro 2019 and Plex or Plex directly on to LG C7 / C9.
The only file I have had a problem with is Gladiator, for some reason there are errors at the beginning of the mux, I have ripped it many times and still the same, if I can get past the studio logo it plays fine.

I have double check my files more than one time and am sure they are correctly ripped in single layer dv.
I think the problem arises from amazon firestick 4k.
I do not have the shield pro 2019.
I also compared mediainfo informations from the files that play correctly and the files that do not.
They look the same every where apart of course the bitrate and other pertinent informations.
In this forum there are very competent people and may be someone can explain this "strange" problem.

[daddy]

Dolby Vision profiles : https://www.dolby.com/us/en/technologie ... levels.pdf
There is no "true" or "false" Dolby vision. There is differents Dolby Vision, with differents profiles, for differents device.
For Ultra HD Blu-ray the profile to use is 7.
https://www.dolby.com/us/en/technologie ... rkflow.pdf

[ragico]

Dolby Vision profiles : https://www.dolby.com/us/en/technologie ... levels.pdf
There is no "true" or "false" Dolby vision. There is differents Dolby Vision, with differents profiles, for differents device.
For Ultra HD Blu-ray the profile to use is 7.
https://www.dolby.com/us/en/technologie ... rkflow.pdf

Of course there is no "true" or "false" Dolby Vision.
I only underlined that the dual layer profile is only used for UHD discs for compatibility reason.
My preference for quality goes to the single layer profile after watching many movies.
But, unfortunately for me, using the amazon firestick 4K only some of my single layer movies play correctly, others only play audio on a black screen, altough the Dolby Vision logo pos out on the display upper right corner.
This happens on Panasonic Gx TV and on Lg C8.

[jesper1994]

I did a few DV mp4 single layer using Dvd Fab with ac3 soundtrack.
I played them using the amazon firestick 4k and emby app for this device. Emby server running on my nas.
Some of these mp4 play normally, others (like spiderman homecoming, The Secret Life of Pets 2 , Game of Thrones seasons 1 and 8 etc) play only audio and black screen. Tv used Panasonic gx serie.
Then I tested the firestick 4k on Lg C8 and had same results.
Therefore I think that the firestick 4K for some unknown (to me) reason do not reproduce video from all the DV mp4 single layer, but just some of them.
Same results using plex (latest beta).
Anyone knows why?

Same problem for me. I have sound, dolby vision is triggered however black screen on firestick 4K LG C7. Which mp4 did play normal, so i can check if i am making a mistake?

For instance,spiderman far from home, casino royale, spectre play normally, while spiderman homecoming, shining, rocketman and others only play audio with black screen both in emby and plex apps for firestick 4k. I have no other device to test eg the ATV 4K.
My believe , supported by what I see in my Lg C8 is that the "true" Dolby Vision is the single layer version. Imho the double version adopted in bluray discs is due to compatibility necessity. In other words if you play a DV disc on a non DV system, you get the hdr version. If you play a single layer DV on an incompatible system you only get audio and a nice steady pic on the display.
I am aware that my opinion is not a technical one, but is perfectly logic.
I posted the "black screen" problem arising from some single layer DV in other forums (amazon and emby) and got no reply from nobody.
I dont think I am the only person experiencing this problem but also here nobody replies.

All those rips work for me playing through a harddrive, however I want to use the new technique that is described earlier to decrease remuxing times. I want to use the adapted player and server., however with that techqnique I get a black screen.