Dolby Vision now possible through MP4 Mux.

[sw5163]

hdr=none prevents HDR10 from being displayed twice in the mediainfo

i've seen this, is that the only thing it effects (mediainfo redaout)? is playback effected at all on anything?

I can't tell the difference between quality from my eyes. So I just don't bother to change it.

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mp4box.exe -add "%BL%:hdr=none:dv-profile=8.1:xps_inband" -add "audio" -add "subtitle" -brand mp42isom -ab dby1 -no-iod -enable 1 "output.mp4"

Hi, I'm curious about what does `-ab dby1 -no-iod -enable 1` mean?
Will they affect final quality of the image?
Could you please explain a little bit more of this, thanks!

Understood! Thanks for the clarification, I'm giving it a test now. I also own an Apple TV and can test if the fake P5 works. Is there a specific player that its been said to work on like Infuse?

Apple's native player or any player that "passthrough" that file to Apple's player core. Avoid using INFUSE.
I play them in "FILE" App directly SMB from my PC.

Also do you guys know if there is an option in mp4box to convert dvhe->dvh1 when importing mp4?

Currently I'm using:
ffmpeg -i dvhe.mp4 -c copy dv.hevc
mp4box -add dv.hevc -new dvh1.mp4
But it would be nice if I could just skip the ffmpeg step.
Thanks.

The command is: https://github.com/gpac/gpac/issues/199 ... 1262491409

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MP4Box -add source_dvhe.mp4:dopt:xps_inband=no -new source_dvh1.mp4

Also if anyone is interested, the latest mp4box auto detects DV Profile now, instead of tag everything as P5 dvh1.
https://github.com/gpac/gpac/issues/199 ... 1263426298

[johnjon94]

Understood! Thanks for the clarification, I'm giving it a test now. I also own an Apple TV and can test if the fake P5 works. Is there a specific player that its been said to work on like Infuse?

you have to use PLEX IIRC. infuse removed support for fake p5 i think.

I'm noticing that the 7.1 EC3 audio is stuttering. EC3 Atmos and ffmpeg EC3 5.1 are fine.
TS and mkv have no issue with 7.1 EC3 tracks

The fake P5 doesn't seem to be working properly. It set a very odd FPS resulting in this crazy length

[RESET_9999]

A few things I noticed

I know, and all of this is in the script.
when apple is used, it's not used...

The only thing i didnt add is " -brand mp42isom -ab dby1 -no-iod -enable 1 " because i didnt want to mess up apple since i did all the test with @ragico with it.
I always been using it on the old mp4muxer workflows though

[johnjon94]

Code: Select all

mp4box.exe -add "%BL%:hdr=none:dv-profile=8.1:xps_inband" -add "audio" -add "subtitle" -brand mp42isom -ab dby1 -no-iod -enable 1 "output.mp4"

Hi, I'm curious about what does `-ab dby1 -no-iod -enable 1` mean?
Will they affect final quality of the image?
Could you please explain a little bit more of this, thanks!

These are the general Dolby Vision parameters that are required when authoring a DV-compliant MP4 file. If you look at that link you posted to github, you'll see the comment under the person is using those same settings. I don't believe it has any effect on the quality but rather ensuring its a proper DV MP4 file.

[RESET_9999]

The fake P5 doesn't seem to be working properly. It set a very odd FPS resulting in this crazy length

maybe an appleTV web-dl ? i know the old mp4muxer also had issue muxing those file because they dont have FPS bistream information.
with the sample files i used, there is no problem:

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Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5.1@High
HDR format                               : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU, HDR10 compatible / SMPTE ST 2086, HDR10 compatible / SMPTE ST 2086
Codec ID                                 : dvh1
Duration                                 : 2 min 1 s
Bit rate                                 : 12.1 Mb/s
Maximum bit rate                         : 30.8 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.061
Stream size                              : 176 MiB (85%)
Title                                    : hevc@GPAC2.1-DEV-rev321-gc68d8a53-master
Encoded date                             : UTC 2022-10-05 01:59:51
Tagged date                              : UTC 2022-10-05 01:59:52
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0001 cd/m2, max: 1000 cd/m2
mdhd_Duration                            : 121830
Codec configuration box                  : hvcC+dvcC

[johnjon94]

The fake P5 doesn't seem to be working properly. It set a very odd FPS resulting in this crazy length

maybe an appleTV web-dl ? i know the old mp4muxer also had issue muxing those file because they dont have FPS bistream information.
with the sample files i used, there is no problem:

Code: Select all

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5.1@High
HDR format                               : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU, HDR10 compatible / SMPTE ST 2086, HDR10 compatible / SMPTE ST 2086
Codec ID                                 : dvh1
Duration                                 : 2 min 1 s
Bit rate                                 : 12.1 Mb/s
Maximum bit rate                         : 30.8 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.061
Stream size                              : 176 MiB (85%)
Title                                    : hevc@GPAC2.1-DEV-rev321-gc68d8a53-master
Encoded date                             : UTC 2022-10-05 01:59:51
Tagged date                              : UTC 2022-10-05 01:59:52
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0001 cd/m2, max: 1000 cd/m2
mdhd_Duration                            : 121830
Codec configuration box                  : hvcC+dvcC

Thats interesting, it is an Apple TV file, but the fps was corrected at the bitstream level so it shouldn't be pulling an incorrect fps. I'll try with a different file

[RESET_9999]

hdr=none
we tested on appletv and LPCM audio didn't work when using it IIRC so that's why you see HDR10 two times when choosing fake p5

[johnjon94]

The fake P5 doesn't seem to be working properly. It set a very odd FPS resulting in this crazy length

maybe an appleTV web-dl ? i know the old mp4muxer also had issue muxing those file because they dont have FPS bistream information.
with the sample files i used, there is no problem:

Code: Select all

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5.1@High
HDR format                               : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU, HDR10 compatible / SMPTE ST 2086, HDR10 compatible / SMPTE ST 2086
Codec ID                                 : dvh1
Duration                                 : 2 min 1 s
Bit rate                                 : 12.1 Mb/s
Maximum bit rate                         : 30.8 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.061
Stream size                              : 176 MiB (85%)
Title                                    : hevc@GPAC2.1-DEV-rev321-gc68d8a53-master
Encoded date                             : UTC 2022-10-05 01:59:51
Tagged date                              : UTC 2022-10-05 01:59:52
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0001 cd/m2, max: 1000 cd/m2
mdhd_Duration                            : 121830
Codec configuration box                  : hvcC+dvcC

Can you point me to the place in the code where the final mp4box settings are for the Apple TV mux with AC3? It will work if I manually set the fps with mp4box, I can't seem to figure out why its pulling the incorrect fps from the stream.

[RESET_9999]

Can you point me to the place in the code where the final mp4box settings are for the Apple TV mux with AC3? It will work if I manually set the fps with mp4box, I can't seem to figure out why its pulling the incorrect fps from the stream.

tell me how to set the fps with mp4box and I'll make the process automatic.

line 19287 if input is 1 video 1 lossy audio and 1 srt

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"%mp4box2_path%" -add %BL%%mbox% -add %audio% -add %subtitles_path% -tmp %TEMP% "%output_path%%filename%_DoVi.sub.DD.mp4"

[sw5163]

hdr=none
we tested on appletv and LPCM audio didn't work when using it

lol, apple is hilarious

[johnjon94]

Can you point me to the place in the code where the final mp4box settings are for the Apple TV mux with AC3? It will work if I manually set the fps with mp4box, I can't seem to figure out why its pulling the incorrect fps from the stream.

tell me how to set the fps with mp4box and I'll make the process automatic.

line 19287 if input is 1 video 1 lossy audio and 1 srt

Code: Select all

"%mp4box2_path%" -add %BL%%mbox% -add %audio% -add %subtitles_path% -tmp %TEMP% "%output_path%%filename%_DoVi.sub.DD.mp4"

It goes directly after the hevc input file like this

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mp4box -add "input.hevc:fps=24000/1001"

[RESET_9999]

It goes directly after the hevc input file like this

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mp4box -add "input.hevc:fps=24000/1001"

thanks. next version will set a fps all the time regardless of if the input is appleTV web-dl or not

[RESET_9999]

try this: https://drive.google.com/file/d/1rhF3Od ... sp=sharing

only support 23.976/24/25 fps for now.. will add more in the official 1.6.1

[johnjon94]

try this: https://drive.google.com/file/d/1rhF3Od ... sp=sharing

only support 23.976/24/25 fps for now.. will add more in the official 1.6.1

This version seems to work great at detecting the correct FPS. I can see right now that its displaying the correct 24000/1001 when importing the HEVC file. However for the subtitles it isn't setting any language for them, and the first subtitle which is forced isn't displaying the Forced tag.

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Text #1
ID                                       : 3
Format                                   : Timed Text
Codec ID                                 : tx3g
Duration                                 : 1 h 28 min
Bit rate mode                            : Variable
Bit rate                                 : 0 b/s
Frame rate                               : 0.004 FPS
Stream size                              : 269 Bytes (0%)
Forced                                   : No

Text #2
ID                                       : 4
Format                                   : Timed Text
Codec ID                                 : tx3g
Duration                                 : 1 h 51 min
Bit rate mode                            : Variable
Bit rate                                 : 117 b/s
Frame rate                               : 0.812 FPS
Stream size                              : 95.7 KiB (0%)
Forced                                   : No

One thing I'd recommend adding in the official version is to include chapter files if they exist in the MKV file. Just as easy as adding any other track with

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-add chapters.txt

[RESET_9999]

yes I know. it is on my todo list since @sw5163 told me about it..
I just dont care much about the mp4 workflows because i dont use them. TS container is much better than mp4.