Dolby Vision now possible through MP4 Mux.

[staknhalo]

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

thank you

Don't use mp4muxer to change dvhe->dvh1 for iOS device.
Currently some files changed this way will lead to black screen on iOS device.(On mac will be fine)
I'm guessing it's because mp4muxer only change codec ID in hex instead of repackaging it.
Same as https://github.com/rixtox/mp4dovi/issues/9
Use mp4box instead
https://www.avsforum.com/threads/apple- ... t-61936696

The correct codec ID (for profile 8.1) should be "hvc1" in place of "hev1". But be careful, these boxes are not random: they indicate to the decoder how the information for the initialization of the latter is stored within the file. Changing the header with a hex editor isn't always enough!

As I said, very often it is not enough to change the header of a box for the file to be played. QuickTime is perhaps smarter and can retrieve the information needed to initialize the decoder. The iPad player may not be capable of it!

thank you

[sw5163]

TL;DR: I want to inject an Dolby Vision P8. 1 RPU into an 1080p film, how?

I don't think x264 supports HDR, so I'm assuming the 1080p track is a SDR one.
If that's the case, you can try muxing it into Profile 8.2 or Profile 9.

However, the result will very likely to be wrong, since it will need "reshaping data" in RPU for SDR->HDR10 colour and PQ change.
For example, from my understanding, P5 RPU has "reshaping data" for ICtCp->YCbCr.
P8.1 RPU doesn't need "reshaping data" for HDR10->HDR10.
P8.4 RPU has "reshaping data" for HLG->PQ.
P7 RPU has "reshaping data" for 4:2:2 12bit to normally play. (I'm not sure what it's really for)

And I think we can only remove "reshaping data" for now rather than adding it.
Therefore, unless you have proper P8.2 RPU or P9 RPU with required "reshaping data" in it, I don't think it's currently possible.

[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

Now, another problem/curiosity I never mentioned way back but just remembered - so if anyone here smarter than me on this wants to take a look

I have never seen this before or after when making a P5+HDR10 > Custom P8 - only ever on this one file/episode - and I've done many

WandaVision Ep2 - towards the start, (the entire scene IIRC) where her and Vision are scared of the noise in bed - only when made into a custom P8 there's incorrect strobing/flashing (not from RPU being misaligned, it's different) - I think it has to do with the base being black & white and something with the color shaping properties in a P5 RPU even though that's stripped or something? Or because of the ICtCp having to mimic just black & white but when put onto an actual black & white base layer? Like I said I don't really know, I just know it's something. You can see it on the walls when Vision is talking in bed really IIRC again.

If anyone is interested and can reproduce, I'm curious as to what you find. Might have even been a bug in Dovi_Tool back then, that's since been squashed for all I know or something?

I just ended keeping P5+HDR10 each for this ep myself.

Edit: And this didn't happen with Ep1 that was also black and white - but Ep1 and Ep2 are different styles of black and white - and I understand there's color info in there even though it looks black and white - it was more like specific objects/areas in the scene where strobing/flashing vs the entire screen - like I said, different from RPU misalignment, why I think it had something to do with 'color'

[jayper]

For Mode I, Workflow 1 can you use an MP4 to extract the base layer? The command line states (MKV/TS/M2TS) so I wasn't sure.

[RESET_9999]

For Mode I, Workflow 1 can you use an MP4 to extract the base layer? The command line states (MKV/TS/M2TS) so I wasn't sure.

yes

[jayper]

Much appreciated!

[redoine322]

Hi Guys i want to ask what is the best way to convert movies to watch it on an internal LG C1 Player DV or HDR and how i can Convert Using your NEW script @RESET_9999 cause things got changed a bit, a big thanks for you amazing work Man

[RESET_9999]

Hi Guys i want to ask what is the best way to convert movies to watch it on an internal LG C1 Player DV or HDR and how i can Convert Using your NEW script @RESET_9999 cause things got changed a bit, a big thanks for you amazing work Man

DV BDMV input: 4-1-1
DV P7 MKV input: 4-2-3

[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?