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Re: Dolby Vision now possible through MP4 Mux.
Posted: Sun Jul 26, 2020 4:53 pm
by RESET_9999
SamuriHL wrote: Sat Jul 25, 2020 11:41 pm
Most people will likely understand this inherently but it should be noted for those that may wonder why the picture "looks dark" with this fix, if you're on an LG display while this fix is enabled, you will want to change the Black setting to HIGH in the picture mode. Because black is getting expanded to full (obviously, I know). I'm using this fix right now with Top Gun. Man, this is bliss.
I didn't change any of my LG C8 Dolby vision settings and there was no brightness or black level difference at all. But I only tested with true profile 5 DV which is encoded in color range ''FULL'".
I have to try with a uhd-bd remux which is encoded in a "limited" color range but my x700 also send those uhd-bd DV in RGB FULL, so I don't expect any difference(at least not with MEL movies).
Disney+ file I tested:
Code: Select all
Video
ID : 4117 (0x1015)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5@High
HDR format : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU
Codec ID : 36
Duration : 2 h 4 min
Bit rate : 20.9 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.105
Stream size : 18.2 GiB (85%)
Color range : Full
Re: Dolby Vision now possible through MP4 Mux.
Posted: Sun Jul 26, 2020 4:56 pm
by RESET_9999
FusionNeo wrote: Sun Jul 26, 2020 4:22 pm
Apparently they're testing it internally and said removing the BT.2020 flag did not make a difference on their end.
that's surprising. The vertex definitely fixes the DV red push on netflix, disney+, movies anywhere... So I guess the vertex is doing more than just removing the bt2020 flag..
Re: Dolby Vision now possible through MP4 Mux.
Posted: Sun Jul 26, 2020 4:58 pm
by SamuriHL
RESET_9999 wrote: Sun Jul 26, 2020 4:53 pm
SamuriHL wrote: Sat Jul 25, 2020 11:41 pm
Most people will likely understand this inherently but it should be noted for those that may wonder why the picture "looks dark" with this fix, if you're on an LG display while this fix is enabled, you will want to change the Black setting to HIGH in the picture mode. Because black is getting expanded to full (obviously, I know). I'm using this fix right now with Top Gun. Man, this is bliss.
I didn't change any of my LG C8 Dolby vision settings and there was no brightness or black level difference at all. But I only tested with true profile 5 DV which is encoded in colorspace ''FULL'".
I have to try with a uhd-bd remux which are encoded in a limited colorspace but my x700 also send those uhd-bd DV in RGB FULL, so I don't expect any difference(at least not with MEL movies).
Disney+ I tested:
Code: Select all
Video
ID : 4117 (0x1015)
Menu ID : 1 (0x1)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5@High
HDR format : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU
Codec ID : 36
Duration : 2 h 4 min
Bit rate : 20.9 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.105
Stream size : 18.2 GiB (85%)
Color range : Full
I realized later that the black level when the TV is in Dolby Vision mode is greyed out and locked. So it would appear that it doesn't matter.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Sun Jul 26, 2020 5:06 pm
by FusionNeo
RESET_9999 wrote: Sun Jul 26, 2020 4:56 pm
FusionNeo wrote: Sun Jul 26, 2020 4:22 pm
Apparently they're testing it internally and said removing the BT.2020 flag did not make a difference on their end.
that's surprising. The vertex definitely fixes the DV red push on netflix, disney+, movies anywhere... So I guess the vertex is doing more than just removing the bt2020 flag..
That's what I'm thinking as well. It does make a noticeable difference in the screenshots you posted, particularly in the metal on C-3PO so the Vertex definitely fixes it. Either way, looks like NVIDIA is purchasing a Vertex so they can test on their end and see what the Vertex is doing exactly that resolves the issue. Thanks for sharing your findings, I think it's pushing them in the right direction and sooner or later they'll get the colorspace right without the need for additional hardware.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Sun Jul 26, 2020 5:53 pm
by SamuriHL
That means, however, that we should be able to play around with the HD Fury settings to see if we can narrow down exactly what the Fury is doing to fix the issue. If it's not that it's stripping out bt.2020, perhaps it's a colorspace change.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 7:26 am
by lexyz
shawnc22 wrote: Sat Jul 18, 2020 11:31 pm
fingers crossed for incidental FEL support on the Shield
As far as I know there is no test pattern to tell if FEL active or not.
S&M UHD Benchmark disk has DV demo clip both FEL and MEL versions. It should be good source to spot any difference.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 3:24 pm
by shawnc22
lexyz wrote: Mon Jul 27, 2020 7:26 am
shawnc22 wrote: Sat Jul 18, 2020 11:31 pm
fingers crossed for incidental FEL support on the Shield
As far as I know there is no test pattern to tell if FEL active or not.
S&M UHD Benchmark disk has DV demo clip both FEL and MEL versions. It should be good source to spot any difference.
I’m sure @RESET9999 has just been combing through his collection looking for good scenes to compare. Is the benchmark disc widely available?
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 3:35 pm
by RESET_9999
shawnc22 wrote: Mon Jul 27, 2020 3:24 pm
I’m sure @RESET9999 has just been combing through his collection looking for good scenes to compare. Is the benchmark disc widely available?
Indeed. I planned on comparing Alita UHD-BD on x700
VS Shield BL+EL+RPU
VS Shield BL+RPU
VS real profile 5 BL+RPU Movies Anywhere.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 3:41 pm
by SamuriHL
The Spears and Munsil UHD benchmark disc is a must have IMO. I use it for testing madvr's tone mapping but it's useful for calibration as well as other things. It's not available for download, no, but, you can purchase it easily enough.
EDIT:
Hmmm, that's a good idea actually. Rip both the FEL and MEL tracks to MKV and run them through the SHIELD using Kodi+ExoPlayer and see if there's a notieable difference.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 4:12 pm
by lexyz
shawnc22 wrote: Mon Jul 27, 2020 3:24 pm
Is the benchmark disc widely available?
Yep. On Amazon and in the wild.
Full name is "Spears & Munsil UHD HDR Benchmark"
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 4:21 pm
by shawnc22
Ah I see, although there is a chance that the MEL and FEL tracks were mastered differently so you might see differences that're not attributed to the Shield's playback abilities. You might have to check with BDInfo to see if the BL from both tracks are the same size/bitrate, but even then the RPUs might also be different between the MEL/FEL tracks.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 5:58 pm
by SamuriHL
Maybe but I've looked at them both on the UB820 and didn't notice any discernible difference. And this is a disc I've looked at a lot. Far more than I care to think about. LOL
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 6:20 pm
by shawnc22
gotcha. maybe while we wait for @RESET9999's work, a shield vs ub820 for the demo FEL track comparison is in order if you have the time
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 6:43 pm
by lexyz
Actually, after I found Stacey Spears comment redarding FEL and MEL I doubt it could be uses for comparison.
Each version was intentionally made with maximum possible quality. So... MEL and FEL BL are not equal - MEL has higher bitrate.
To catch a difference you need to pixel-peeping for compression artifacts.
Peacock feather scene around 3:00 should be suitable for such endeavor.
Re: Dolby Vision now possible through MP4 Mux.
Posted: Mon Jul 27, 2020 6:50 pm
by shawnc22
lexyz wrote: Mon Jul 27, 2020 6:43 pm
Actually, after I found Stacey Spears comment redarding FEL and MEL I doubt it could be uses for comparison.
Each version was intentionally made with maximum possible quality. So... MEL and FEL BL are not equal - MEL has higher bitrate.
To catch a difference you need to pixel-peeping for compression artifacts.
Peacock feather scene around 3:00 should be suitable for such endeavor.
Yeah that's what I figured, but a comparison of just the FEL tracks on the Shield vs a bluray player should still be valid for our purpose. Actually a comparison of just the MEL and FEL tracks on the Shield should also be of some good use. If they have similar picture like they are supposed to, then it's a good sign for the Shield's FEL capabilities. But if the FEL track looks vastly different, then the EL is probably not being properly applied.