Dolby Vision now possible through MP4 Mux.

[AndreasT]

But you didn't convert the FEL to MEL as asked right? The pics on the right is from a Dual Track Dual Layer file with FEL?

In addition to the original question comparing UHD playback with a FEL to MEL conversion, it would be interesting to compare a FEL to MEL conversion to when only the BL is played without HDR at all.

I mean, if only the BL is played, with no HDR at all, is the picture really as dark as when playing a DV dual track dual layer with FEL?

both pics are from the original Dual Track, Dual Layer with FEL !
left side on the Bluray Player, right side from the CX interal Player.

I don´t know what you mean with "BL is played without HDR" - sorry.

If you play BL HDR10 the picture is correct.

If you play Dolby Vision Single Layer (only RPU) the picture is as the right side, both on the Bluray player and on the TV.

You can´t convert FEL to MEL.

"Convert" is maybe the wrong word. I just used it since its used to describe what yusesope's tool (https://www.makemkv.com/forum/viewtopic ... 970#p96282) is used for.

So what does that tool really do then?

When I use it the resulting mp4 plays on my LG CX what appears to be fine, e.g. as your left picture, with DV and what seems to be ok colors. I tried both starting with a UHD backup and use this tool to "mux and convert to MEL" creating a "converted" single track that i then put into a mp4 file. I also tried to use a mkv from makemkv as the source, and use that tool to "demux and convert to MEL", and then mux the two resulting files as separate video tracks in an mp4 file (using mp4muxer v1.0.0). In both cases the files plays with DV and what appears ok colors.

[Wanderlust3K]

If you play BL HDR10 the picture is correct.

If you play Dolby Vision Single Layer (only RPU) the picture is as the right side, both on the Bluray player and on the TV.

You can´t convert FEL to MEL.

I tested the files on my CX.

HDR10 looks fine.

Both DL & SL look WRONG, supper dark --> EL is not decoded on the DL, not present on the SL.

[Wanderlust3K]

So what does that tool really do then?

Keep the RPU data = Dynamic HDR ??

EL is lost, it doesnt matter on MEL tittles since theres only RPU there but MATTERS on FEL tittles, keeping RPU alone is not enough for FEL tittles.

[lexyz]

EL is lost, it doesnt matter on MEL tittles since theres only RPU there but MATTERS on FEL tittles, keeping RPU alone is not enough for FEL tittles.
...
Now, whats the point of MEL Dolby Vision stuff if the same quality can be achieved with HDR10+ or even with plain HDR10 with Dynamic tonemmaping ON?

Try UHD to p8 conversion.

FEL is mostly used for 12bit color restoration. Thats all
Image transformations are based on RPU data.

Yes, some scenes can noticably lost in picture quality if EL dropped. This is a cause for concern about StudioCanal disks

[RESET_9999]

Here's a way of finding out if your playback device is processing the FEL or not.

mp4 FEL DT-DL sample: https://drive.google.com/file/d/1PszHwO ... sp=sharing
TS FEL ST-DL sample: https://drive.google.com/file/d/1caOej3 ... sp=sharing
mkv FEL ST-DL sample: https://drive.google.com/file/d/1KV7lqA ... sp=sharing
mp4 FEL ST-DL sample: https://drive.google.com/file/d/1AYrRZo ... sp=sharing
TS P8 SL RPU sample: https://drive.google.com/file/d/1fNW6gE ... sp=sharing



These files are a mix of a BL and a random FEL track. This makes the FEL data visible on top of the BL when played in DV so it easily tells us if the player just ignores the EL or if it actually uses it. The P8 SL sample also has the same random RPU metadata.

Results:

x700 FEL playback = visible FEL
C8 FEL playback = visible FEL
Shield FEL playback = No FEL data visible
p8 SL file = of course, no FEL data visible at all on all my devices

So this confirms that the Shield is not decoding the EL and is just using the dynamic metadata.
Also, the new update does not fix the red push issue

look for the FEL noise and compare it with the p8 sample which will be clean of noise :




C8-fel / C8-p8-rpu / shield-fel / shield-p8-rpu / x700-FEL / x700-p8-rpu


** please do not compare the colors of these pictures. this was just to show the FEL . I did not take time to get the same frame, lock the exposure etc...

[shawnc22]

These files are a mix of a BL and a random FEL track. This make the FEL data visible on top of the BL when played in DV so it easily tells us if the player just ignores the EL or if it actually use it. The P8 SL sample also has the same random RPU metadata.

Results:

x700 FEL playback = visible FEL
C8 FEL playback = visible FEL
Shield FEL playback = No FEL data visible at all
p8 sl file = of course no FEL data visible at all on all my devices

So this confirm that the Shield is not decoding the EL and is just using the dynamic metadata.
Also, the new update does not fix the red push issue

Kudos on the ingenious testing method! Unfortunately, the Shield ignoring EL was confirmed to me by an Nvidia staff as well. Not a shocker, but was still hoping for a surprise support nonetheless. Regarding the red push, where are you still seeing it on? I know it's still there for p7 DV rips, but I was under the impression that it was fixed for streaming content when they removed the BT2020 tag from the RGB signal. I haven't looked too closely or really cared to honestly, but curious to what you're still seeing.

[agneva]

OLED CX9LA: no FEL visible, test ST DL FEL.ts can´t be played, test DT DL FEL.mp4 to dark.

UBK90: FEL visible at test DT DL FEL.mp4, p8 of course not, test ST DL FEL.ts can´t be played

as I wrote before

[lexyz]

I would like to add some info reagarding LLDV mode. Turns out there is a bug in Dolby SDK for all UHD Blu-ray players (and oppoclones as well)
This bug leads to noticable picture quality loss in LLDV mode like muted colors, limited brightness and various artefacts.
Probably you already familiar with this video by HDTVtest: https://www.youtube.com/watch?v=e_a77zJTrO4
Sadly Vincent Theo is wrong in conlusion. Difference caused not by additional data from TV but by a bug in Dolby SDK

Shield TV and FireStick and probably any other DV capable device (exept UHD Blu-ray player) are free from this bug

So yeah... fellow Bravia owners there is not so many options for us to enjoy DV besides streaming

X700/Oppo/Panny - FEL is used, dimness, bugged picture
Shield TV - FEL is ignored, red push
Fire TV Stick - FEL is unplayable, low specs for UHD backups

Is Zidoo the only viable option for now?

[shawnc22]

I would like to add some info reagarding LLDV mode. Turns out there is a bug in Dolby SDK for all UHD Blu-ray players (and oppoclones as well)
This bug leads to noticable picture quality loss in LLDV mode like muted colors, limited brightness and various artefacts.
Probably you already familiar with this video by HDTVtest: https://www.youtube.com/watch?v=e_a77zJTrO4
Sadly Vincent Theo is wrong in conlusion. Difference caused not by additional data from TV but by a bug in Dolby SDK

Shield TV and FireStick and probably any other DV capable device (exept UHD Blu-ray player) are free from this bug

So yeah... fellow Bravia owners there is not so many options for us to enjoy DV besides streaming

X700/Oppo/Panny - FEL is used, dimness, bugged picture
Shield TV - FEL is ignored, red push
Fire TV Stick - FEL is unplayable, low specs for UHD backups

Is Zidoo the only viable option for now?

The Zidoo doesn’t support FEL either as far as I know

[RESET_9999]

Regarding the red push, where are you still seeing it on? I know it's still there for p7 DV rips, but I was under the impression that it was fixed for streaming content when they removed the BT2020 tag from the RGB signal. I haven't looked too closely or really cared to honestly, but curious to what you're still seeing.

yes, I was talking about the DV rip from uhd-bd, I checked the Dr. Sleep sample quickly after the update.
In fact, any DV file that is not genuine profile 5 from the streaming services has the red push issue. (p7 p8 p4)
P5 playback on the Shield is not as color accurate as my x700 / C8 but the difference is negligible: I don't think I would notice a difference without the picture comparisons.
I almost never use my Shield though, I prefer my x700 for Netflix and Amazon because of the frame rate match. I know there's a couple of people on the Nvidia forum that says they're seeing issues with p5 as well. I know there are no red artifacts on Dr. Sleep Movies Anywhere / shield.

[daicon]

I would like to add some info reagarding LLDV mode. Turns out there is a bug in Dolby SDK for all UHD Blu-ray players (and oppoclones as well)
This bug leads to noticable picture quality loss in LLDV mode like muted colors, limited brightness and various artefacts.
Probably you already familiar with this video by HDTVtest: https://www.youtube.com/watch?v=e_a77zJTrO4
Sadly Vincent Theo is wrong in conlusion. Difference caused not by additional data from TV but by a bug in Dolby SDK

Shield TV and FireStick and probably any other DV capable device (exept UHD Blu-ray player) are free from this bug

So yeah... fellow Bravia owners there is not so many options for us to enjoy DV besides streaming

X700/Oppo/Panny - FEL is used, dimness, bugged picture
Shield TV - FEL is ignored, red push
Fire TV Stick - FEL is unplayable, low specs for UHD backups

Is Zidoo the only viable option for now?

Where does the information in the SDK come from?

If it is finally so, I understand that the SDK, Oppo and similar players will get an update to fix it, won't they?
Can you put test images?

thanks

[glc650]

Here's a way of finding out if your playback device is processing the FEL or not.

FEL DT-DL sample: https://drive.google.com/file/d/1PszHwO ... sp=sharing
FEL ST-DL sample: https://drive.google.com/file/d/1caOej3 ... sp=sharing
P8 SL RPU sample: https://drive.google.com/file/d/1fNW6gE ... sp=sharing

Which movie is this from?

[RESET_9999]

Which movie is this from?

BL is Olympus has fallen and EL is Leon the professional

[RESET_9999]

So yeah... fellow Bravia owners there is not so many options for us to enjoy DV besides streaming

yep, just sell that TV and get an LG lol.
Even Dolby recommends to the colorist the LG C7 or newer for previewing.

https://dolby.my.salesforce.com/sfc/p/# ... 1D2vuoxiW4

[agneva]

yes, when switching from HDR10 to DV, my LG gets from YCbCr 12bit to RGB 8bit (LG UBK90 <-> LG OLED CX9LA), first time I´ve seen this I wondered.

the method Dolby Vision (DV) uses to transport the signal over HDMI is referred to as “RGB Tunneling”. The 12-bit ICtCp DV signal + Metadata is encapsulated inside the regular RGB 8-bit video signal. The DV “tunneling” carries 12-bit YCbCr 4:2:2 data in an RGB 4:4:4 8-bit transport. This is possible because both signal formats have the same 8.9 Gbps data rate requirements.