Dolby Vision now possible through MP4 Mux.

[sw5163]

Hey guys just wanted to say, even though not a HDR capable device - my iPhone 8 Plus displays RPU effects when doing (both native/hybrid) P5 DVH1 - thanks again

DV is supposed to deliver director's intention even on SDR/100nit device and trim the content as closed as possible to what filmmakers want us to see.
While keeping the maximum potential dynamic range at the same time.

That's why even some 500nit laptops can get DV certification.
It's very useful when adjusting screen brightness too, if 1000nit is just too bright to watch.

[staknhalo]

Hey guys just wanted to say, even though not a HDR capable device - my iPhone 8 Plus displays RPU effects when doing (both native/hybrid) P5 DVH1 - thanks again

DV is supposed to deliver director's intention even on SDR/100nit device and trim the content as closed as possible to what filmmakers want us to see.
While keeping the maximum potential dynamic range at the same time.

That's why even some 500nit laptops can get DV certification.
It's very useful when adjusting screen brightness too, if 1000nit is just too bright to watch.

Yeah I had heard when these devices first came out in a review and were said to have Dolby Vision support even though not HDR they contacted Apple and they replied - "they have brightness/contrast enhancements when viewing Dolby Vision content" - I figured that meant RPU effects - I just never got it to work because I was missing the DVH1 flag

Now I have an issue with Ep 4, 6 and 8 of Mandalorian S1 DV Profile 5 - mp4box is telling me:

[H263Dmx] garbage before first frame!

Internet searches yield no results

This bad data(?) is in the (only) source so it wasn't a demux issue (used tsmuxer and ffmpeg) - mp4box was only spitting out blank screen incorrect length mp4 files with that error on Windows and iOS (but mp4muxer was making perfectly fine dvhe files with same inputs on Windows and Android but not iOS - iOS audio but no video)

I tried to use

mp4muxer --dv-profile 5 --input-file BL.hevc --input-file audio.ec3 --dvh1flag 0 --output-file output.mp4

And just FYI to others, that flag is only in the latest mp4muxer (Feb 2022) - took me a few to figure that out (tried the older one you had, then the slightly newer one I had, but didn't know it was updated since)

And same as old mp4muxer results as above - dvh1 flag now, but blank screen on iOS still but Windows and Android still fine

I guess just erroneous capture in the source ? :/

[sw5163]

Now I have an issue with Ep 4, 6 and 8 of Mandalorian S1 DV Profile 5 - mp4box is telling me:

I had The.Mandalorian.S01.2160p.DSNP.WEB-DL.DDP5.1.Atmos.DV.MP4.x265-MZABI[rartv] converted when it came out.
Didn't remember there was an issue.

If you are certain the error is specific to those files, please try mp4mux - Bento4.

Command line is probably something like this:
mp4mux(bento4) --track dv.hevc#dv_profile=5,frame_rate=23.976 --track atmos.ec3 bento4sample.mp4

bento4 and mp4box are the only two tools I know on Windows that can get iOS compatible P5 DVH1 mp4.
(mp4muxer sometimes results in black screen)

bento4 is the tool I used before mp4muxer and mp4box, and is actually recommended by ShaoWeiguo, the author of mp4muxer, when I asked him about iOS black screen a long time ago.
But be careful bento4 has frame_rate mismatch issue so you have to specify frame_rate as above.

[staknhalo]

Now I have an issue with Ep 4, 6 and 8 of Mandalorian S1 DV Profile 5 - mp4box is telling me:

I had The.Mandalorian.S01.2160p.DSNP.WEB-DL.DDP5.1.Atmos.DV.MP4.x265-MZABI[rartv] converted when it came out.
Didn't remember there was an issue.

If you are certain the error is specific to those files, please try mp4mux - Bento4.

Command line is probably something like this:
mp4mux(bento4) --track dv.hevc#dv_profile=5,frame_rate=23.976 --track atmos.ec3 bento4sample.mp4

bento4 and mp4box are the only two tools I know on Windows that can get iOS compatible P5 DVH1 mp4.
(mp4muxer sometimes results in black screen)

bento4 is the tool I used before mp4muxer and mp4box, and is actually recommended by ShaoWeiguo, the author of mp4muxer, when I asked him about iOS black screen a long time ago.
But be careful bento4 has frame_rate mismatch issue so you have to specify frame_rate as above.

Yeah, the mzabi release, even reacquired the 4-6-8 eps to confirm the missing/bad/garbage data was in source

using

Code: Select all

mp4mux --track Video.hevc#dv_profile=5,frame_rate=23.976 --track audio.aac FileName.mp4

mp4mux made a file without error - with dvh1 - but plays on Windows, but doesn't play on iOS or Android (iOS just spins never plays Android throws an error no playback)

mp4muxer dvhe/dvh1 are the only 'passable' outputs, though still not 100% accurate because doesn't work on iOS but does work on Windows/Android - it's gotta be the source, oh well

Edit: and I tried demuxing the video stream out of the mp4mux output file and using that in mp4box - still same 'garbage' error - out of 34 P5 files I have it was just those 3 - meh can't win them all

[sw5163]

Yeah, the mzabi release, even reacquired the 4-6-8 eps to confirm the missing/bad/garbage data was in source

I reacquired one of the eps you mentioned. Can confirm there is something wrong with the mp4 package.
It seems mp4box recognize it as h.263, no idea what that is.
However, you can split it:

Code: Select all

ffmpeg -i broken.mp4 -c copy -t 1:00 first.hevc
ffmpeg -i broken.mp4 -c copy -ss 1:00 second.hevc

And then concat them together (lossless)

Code: Select all

mp4box -cat first.hevc -cat second.hevc -new fix.dvh1.mp4

It will work on iOS devices.
No idea what's going on with that file.

Also why using aac instead of EAC3/atmos inside the file?

[xxyz1]

Hi guys!

I've this file:
Dolby Vision, Version 1.0, dvhe.08.06, BL+RPU, HDR10 compatible / SMPTE ST 2086, HDR10 compatible

Trying this:

mp4mux --track track_1_und.hevc#dv_profile=8,frame_rate=23.976 --track track_2_deu.ec3 bento4sample.mp4

But it says
integer number for Dolby vision BL signal cross-compatibility ID

What I have to do?
Thanks so much

[sw5163]

But it says
integer number for Dolby vision BL signal cross-compatibility ID

For P8.1 you have to specify dolby vision base layer signal compatibility id to 1.(to 4 if DV hlg P8.4)

Code: Select all

mp4mux(bento4) --track dv.hevc#dv_profile=8,dv_bc=1,frame_rate=23.976 --track atmos.ec3 p81.hvc1.mp4

But, please don't use mp4mux(bento4) other than making iOS compatible mp4.
In fact, I have never been using it since mp4box v2.0 came out.
Use mp4muxer or mp4box or @RESET_9999 's script under his signature instead.

I see the file you have is already P8.1 dvhe, may I ask why would you like to convert it again?

[xxyz1]

I see the file you have is already P8.1 dvhe, may I ask why would you like to convert it again?

Because my OLED LG 55B6D can't play thie Dolbyvision.

Use mp4muxer or mp4box or @RESET_9999 's script under his signature instead.

Tried mp4muxer but can't open a mkv file. Is there a Howto?
The other I will try out.

[staknhalo]

Yeah, the mzabi release, even reacquired the 4-6-8 eps to confirm the missing/bad/garbage data was in source

I reacquired one of the eps you mentioned. Can confirm there is something wrong with the mp4 package.
It seems mp4box recognize it as h.263, no idea what that is.
However, you can split it:

Code: Select all

ffmpeg -i broken.mp4 -c copy -t 1:00 first.hevc
ffmpeg -i broken.mp4 -c copy -ss 1:00 second.hevc

And then concat them together (lossless)

Code: Select all

mp4box -cat first.hevc -cat second.hevc -new fix.dvh1.mp4

It will work on iOS devices.
No idea what's going on with that file.

Also why using aac instead of EAC3/atmos inside the file?

This worked for Ep4, thanks

But Ep6 and Ep8 get audio sync issues even with this (not Ep4 strangely) - using either my aac encoded audio or original sources' eac3 audio (I only do soundbars and space adds up over files/time - why I encode to aac stereo - with Dolby upmix though so it's something better than nothing if ever played on surround)

And even going from source ffmpeg throws this on 6 & 8

Code: Select all

Error applying bitstream filters to an output packet for stream #0: Invalid data found when processing input
av_interleaved_write_frame(): Invalid data found when processing input
Error muxing a packet for output file #0

Also, I notice DVHE profile 8 stutters on iOS/iPhone 8 Plus - only way to get it not to is to process with mp4box, but then in mediainfo it's labeled fake p5 - which I don't want for p8 files

I understand p8 alone and especially p8 with DVHE won't do DV on iOS, that's fine playback in HDR10 is what I'm fine with - but is the stutter always going to be there unless I make it a fake p5? Or is just because the iPhone 8 Plus is older, and on newer devices it will play smoother?

It's like even though DVHE it sees it's Dolby Vision and is just stuttering on the metadata on playback even if not displaying the RPU

[sw5163]

But Ep6 and Ep8 get audio sync issues even with this (not Ep4 strangely) - using either my aac encoded audio or original sources' ec3 audio (I only do soundbars and space adds up over files/time - why I encode to aac with Dolby upmix though)

This release is just broken, I will give EP6 and 8 some tests.

I understand p8 alone and especially p8 with DVHE won't do DV on iOS, that's fine playback in HDR10 is what I'm fine with - but is the stutter always going to be there unless I make it a fake p5? Or is just because the iPhone 8 Plus is older, and on newer devices it will play smoother?

First, mp4 with dvhe flag is not even playable by Apple's native player, you can only play that with third-party APP like Infuse/plex.
Second, fake p5 is fine, Apple use it in their own ATV screensavers. The dolby windows app can play it, LG TV can play it.
https://sylvan.apple.com/Aerials/2x/entries.json

If you really don't want that, you can either: remove DV header (which won't do DV on anything)

Code: Select all

ffmpeg -i p8.dvhe.mp4 -c copy -vtag hvc1 hvc1.mp4

or convert to p8.1 hvc1 with DV(which won't do DV on Apple)

Code: Select all

mp4box -add dv.hevc:dv-profile=8.1 -new p81.hvc1.mp4

It's like even though DVHE it sees it's Dolby Vision and is just stuttering on the metadata on playback even if not displaying the RPU

It's very likely that whatever the player you are using to decode DVHE is processing the video on its own, instead of hand them properly to Apple's player core. That's why I never use third part player on iOS.

[staknhalo]

or convert to p8.1 hvc1 with DV(which won't do DV on Apple)

Code: Select all

mp4box -add dv.hevc:dv-profile=8.1 -new p81.hvc1.mp4

That's what I'm after for p8 - so like DVHE/DVH1, it's a HEV1/HVC1 issue - but only with Dolby Vision files - but yet HEV1 files not Dolby Vision play fine - only HEV1 with Dolby Vision - any clue as to why besides just the way it is (according to Apple)? Edit: No, HEV1 even without Dolby Vision stutters. I have a lot of work to do

Edit: Found this :

'hvc1' stores all parameter sets inside the MP4 container below the sample description boxes. 'hev1' stores all parameter sets in band (inside the HEVC stream).

The parameter sets are essentially mandatory metadata necessary to decode the streams.

So you have two slightly different ways of muxing HEVC into MP4.

I'd choose based on the play out and transport scenario.

Your player or your transport specification may require one or the other.

It's very likely that whatever the player you are using to decode DVHE is processing the video on its own, instead of hand them properly to Apple's player core. That's why I never use third part player on iOS.

Plex for Android/iOS - Windows is just native Windows Store apps with Dolby Vision plugin simply to verify RPU alignment/sound and audio in sync/etc

[sw5163]

Edit: Found this :

Yes, that's the reason mp4muxer/mp4dovi from github resulting in black screen.
Change fourcc codec in hex is not enough.

That's what I'm after for p8 - so like DVHE/DVH1, it's a HEV1/HVC1 issue - but only with Dolby Vision files - but yet HEV1 files not Dolby Vision play fine - only HEV1 with Dolby Vision - any clue as to why besides just the way it is (according to Apple)? Edit: No, HEV1 even without Dolby Vision stutters. I have a lot of work to do

You can regard players that play hev1/dvhe are first doing "software decoding", then pass them to Apple's player core.
While hvc1/dvh1 pass directly to Apple's player core and do "hardware decoding".

Or is just because the iPhone 8 Plus is older, and on newer devices it will play smoother

No, iPhone 8 Plus use A11 bionic and my iPad Pro 2017 use A10x fusion, they are way sufficient enough to play DV.
In fact, I think if Dolby allow Apple to play FEL, they can play even 4K 60 fps FEL and 4K 120fps MEL. (8K should have a problem though)

[staknhalo]

Code: Select all

mp4box -add dv.hevc:dv-profile=8.1 -new p81.hvc1.mp4

Off the top of your head, do you know what the command would be for profile 7 single layer FEL, if supported? Just:

Code: Select all

mp4box -add dv.hevc:dv-profile=7 -new p7.hvc1.mp4

Edit: Yes that was it

Double edit: No, spits out an p7 mp4, but still hev1

Triple edit: No, I'm a dummy, demux first, don't just go mp4>mp4, it spits out HVC1 though - could I now just hex edit that to DVH1? Let's see.........

[sw5163]

Off the top of your head

No idea what that means.

do you know what the command would be for profile 7 single layer FEL, if supported? Just:

Apple doesn't support FEL, only MEL.
I have done all the possible conversions I could think of.

[staknhalo]

Code: Select all

mp4box -add dv.hevc:dv-profile=8.1 -new p81.hvc1.mp4

Off the top of your head, do you know what the command would be for profile 7 single layer FEL, if supported? Just:

Code: Select all

mp4box -add dv.hevc:dv-profile=7 -new p7.hvc1.mp4

Edit: Yes that was it

Double edit: No, spits out an p7 mp4, but still hev1

Triple edit: No, I'm a dummy, demux first, don't just go mp4>mp4, it spits out HVC1 though - could I now just hex edit that to DVH1? Let's see.........

This is working with single layer FEL p7

Playback is smooth on iOS/iPhone 8 Plus as just HDR10, triggers Dolby Vision on Android TV - both RPU on just SHIELD (doesn't support FEL) - and FEL and RPU on Tivo Stream 4k

Used Game of Thrones UHD FEL and Reset's Clockwork Orange FEL test file to confirm

Just hex edit fist HVC1 to DVH1 in hex editor after p7.mp4 output from mp4box (probably not needed, as I believe Android just reads from the HEV stream - but this way will show 'dvh1' codec ID in mediainfo)



https://mega.nz/file/kGJwiBaL#XUH0tvI1J ... 9gHNfYZHKo