Bad Frame when converting to HDR in UniFab 3.0.1.9

dan2194919

I tried to convert to HDR a video with constant frame rate of 23.976 and in output I got I video with the following rate:

ID                          : 1
Format                      : HEVC
Format/Info                 : High Efficiency Video Coding
Format profile              : Main 10@L5.1@High
HDR format                  : SMPTE ST 2086, HDR10 compatible
Codec ID                    : hev1
Codec ID/Info               : High Efficiency Video Coding
Duration                    : 10 min 0 s
Bit rate mode               : Variable
Bit rate                    : 4 266 kb/s
Width                       : 1 920 pixels
Height                      : 800 pixels
Display aspect ratio        : 2.40:1
Frame rate mode             : Variable
Frame rate                  : 5.997 FPS
Minimum frame rate          : 3.996 FPS
Maximum frame rate          : 23.976 FPS
Original frame rate         : 23.976 (24000/1001) FPS

which is almost unwatchable.

Using the Dolby Video conversion, the situation is better and I got

ID                          : 1
Format                      : HEVC
Format/Info                 : High Efficiency Video Coding
Format profile              : Main 10@L5.1@High
HDR format                  : Dolby Vision, Version 1.0, Profile 5.0, dvhe.05.03, BL+RPU, no metadata compression / SMPTE ST 2086, Version HDR10, HDR10 compatible
Codec ID                    : hev1
Codec ID/Info               : High Efficiency Video Coding
Duration                    : 9 min 59 s
Bit rate                    : 5 919 kb/s
Width                       : 1 920 pixels
Height                      : 800 pixels
Display aspect ratio        : 2.40:1
Frame rate mode             : Variable
Frame rate                  : 23.976 (23976/1000) FPS
Minimum frame rate          : 23.976 FPS
Maximum frame rate          : 24.000 FPS
Original frame rate         : 23.976 (24000/1001) FPS

Please change your encoding so that the conversion will use the constant frame rate encoding. If you want to keep the Variable rate encoding (something that was used in last century) add at least an option to select constant frame encoding and set this a default for the High Video Quality Output.

Thanks

Alex_Videoman

Please be aware that Dolby Vision will not play on any mmajor player such as plex, emby, vlc, etc. as the output file is not compliant with any dolby vision profile.
The bug here is that unifab profile 5 has decided to insert a HDR10 fallback which is not compliant at all with the standard so no player will play it as it is not a recognized profile.
They know about the bug, but are not willing to fix it so far.

dan2194919

No, in this case the BIG problem is that a movie encoded with 23.976 fps constant mode, was encode after HDR conversion to:

Frame rate mode             : Variable
Frame rate                  : 5.997 FPS
Minimum frame rate          : 3.996 FPS
Maximum frame rate          : 23.976 FPS

the movie play in slow motion with an average fps of only 5.997. This is the BIG problem!

Alex_Videoman

dan2194919 did you use autopilot or the dedicated HDR app?

Alex_Videoman

Yep, was just pointing out that this is not the only bug there when it comes to HDR and DoVI

Alex_Videoman

I can check my HDR files if you want, which program or commands do you use to read the metadata?

Alex_Videoman

OK I had one with the same issue as you had, the other ones are good.

General
Complete name : \Server10\Multimedia\iTunes Media\Movies\2 Guns\2 Guns (2013).mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/dby1/iso2/mp41)
File size : 13.7 GiB
Duration : 1 h 49 min
Overall bit rate : 18.0 Mb/s
Frame rate : 23.976 FPS
Movie name : 2 Guns_hdr
Genre : Action
Description : 2 Guns, 1 Bank.
Recorded date : 2025
Writing application : Lavf60.3.100
Comment : Information courtesy of TMDb (www.themoviedb.org). Used with permission.
LongDescription : A DEA agent and an undercover Naval Intelligence officer who have been tasked with investigating one another find they have been set up by the mob – the very organization the two men believe they have been stealing money from.

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
HDR format : SMPTE ST 2086, HDR10 compatible
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 1 h 49 min
Source duration : 1 h 49 min
Bit rate : 16.6 Mb/s
Maximum bit rate : 17.3 Mb/s
Width : 3 840 pixels
Height : 1 600 pixels
Display aspect ratio : 2.40:1
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
Bits/(Pixel*Frame) : 0.113
Stream size : 12.7 GiB (92%)
Source stream size : 13.2 GiB (96%)
Writing library : HEVC Coding
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : BT.2020
Mastering display luminance : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level : 1234 cd/m2
Maximum Frame-Average Light Level : 567 cd/m2
mdhd_Duration : 6555258
Codec configuration box : hvcC

Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : ec-3
Duration : 1 h 49 min
Source duration : 1 h 49 min
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 500 MiB (4%)
Source stream size : 500 MiB (4%)
Title : Surround Audio
Language : English
Service kind : Complete Main
Default : Yes
Alternate group : 1
Dialog Normalization : -31 dB
dialnorm_Average : -31 dB
dialnorm_Minimum : -31 dB
dialnorm_Maximum : -31 dB

Alex_Videoman

Now the issue with DoVI is the HDR10 fallback and frame rate as well…..

General
Complete name : \Server10\Multimedia\iTunes Media\Test2\C;est pas Sourcier_ 6 juin 1944 Le debarquement_hdr.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/dby1/iso2/mp41)
File size : 4.95 GiB
Duration : 26 min 2 s
Overall bit rate : 27.2 Mb/s
Frame rate : 30.000 FPS
Collection : EaseUS
Album : EaseUS, Season 0
Album/Performer : EaseUS
Track name : C;est pas Sourcier_ 6 juin 1944 Le debarquement_hdr
Performer : EaseUS
Genre : Movie
ContentType : Short Film
Recorded date : 2025
Writing application : Lavf60.3.100
Part_ID : S00E00

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, Profile 5.0, dvhe.05.06, BL+RPU, no metadata compression / SMPTE ST 2086, Version HDR10, HDR10 compatible
Codec ID : hev1
Codec ID/Info : High Efficiency Video Coding
Duration : 26 min 2 s
Bit rate : 26.6 Mb/s
Width : 2 880 pixels
Height : 2 160 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.142
Stream size : 4.83 GiB (98%)
Writing library : DOVI Coding
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: 0.0010 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 1402 cd/m2
Maximum Frame-Average Light Level : 315 cd/m2
Codec configuration box : hvcC+dvcC

Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : ec-3
Duration : 26 min 2 s
Source duration : 26 min 2 s
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 119 MiB (2%)
Source stream size : 119 MiB (2%)
Language : French
Service kind : Complete Main
Default : Yes
Alternate group : 1
Dialog Normalization : -31 dB
dialnorm_Average : -31 dB
dialnorm_Minimum : -31 dB
dialnorm_Maximum : -31 dB

vivi

Regarding the issue of reduced frame rates after HDR conversion, we have reported it to the relevant department and will investigate it as soon as possible.
Concerning the incompatibility of Profile 5 with certain devices, the underlying response is that there are plans to make adjustments for Profile 8 in the future.

Alex_Videoman

vivi why don’t you fix it, this is easy here, just remove the HDR10 fallback from the metadata and then it should be compliant…. I really do not understand why you just do it at this point.

dan2194919

I have the same problem, I don’t understand why Unifab has not already fixed this simple problem.

vivi

For this hdr producing bad frame problem, please try 3020 on your end.

dan2194919

With version 3.0.2.0 the problem seems to be solved.

Thanks

vivi

dan2194919 Good to know it works on your end again. Any problem please feel free to contact us.

Alex_Videoman

vivi btw here is the right way to do DoVi profile 5
General
Unique ID : 319968729421011528478950372412174206747 (0xF0B7BC58891E48C493D69769D9B1871B)
Complete name : C:\Users\admin\Documents\DVDFab\StreamFab\Output\Max\The Gilded Age\S03\The Gilded Age_S03E04_Marriage Is a Gamble.mkv
Format : Matroska
Format version : Version 4
File size : 3.99 GiB
Duration : 59 min 36 s
Overall bit rate : 9 584 kb/s
Frame rate : 23.976 FPS
Movie name : Marriage Is a Gamble
Description : Bertha deals with unwanted rumors in the press… and the surprise arrival of her sister Monica.
Encoded date : 2025-07-14 01:52:04 UTC
Writing application : mkvmerge v92.0 (‘Everglow’) 64-bit
Writing library : libebml v1.4.5 + libmatroska v1.7.1
Cover : Yes
Attachments : cover.png

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4.1@Main
HDR format : Dolby Vision, Version 1.0, Profile 5, dvhe.05.03, BL+RPU, no metadata compression
Codec ID : V_MPEGH/ISO/HEVC
Duration : 59 min 35 s
Bit rate : 9 315 kb/s
Width : 1 920 pixels
Height : 1 080 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
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.187
Stream size : 3.88 GiB (97%)
Writing library : x265 3.5+1-f0c1022b6:[Linux][GCC 10.2.1][64 bit] 10bit
Encoding settings : cpuid=1111039 / frame-threads=4 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=1 / input-res=1920×1080 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=0 / uhd-bd=0 / ref=3 / no-allow-non-conformance / repeat-headers / annexb / aud / no-eob / no-eos / hrd / info / hash=0 / no-temporal-layers / no-open-gop / min-keyint=96 / keyint=96 / gop-lookahead=0 / bframes=4 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=96 / lookahead-slices=6 / scenecut=40 / no-hist-scenecut / radl=0 / no-splice / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=3 / limit-refs=1 / no-limit-modes / me=1 / subme=2 / merange=57 / temporal-mvp / no-frame-dup / no-hme / weightp / weightb / no-analyze-src-pics / deblock=0:0 / no-sao / no-sao-non-deblock / rd=3 / selective-sao=0 / early-skip / rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=crf / crf=19.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / vbv-maxrate=9750 / vbv-bufsize=20000 / vbv-init=0.9 / min-vbv-fullness=50.0 / max-vbv-fullness=80.0 / crf-max=0.0 / crf-min=0.0 / ipratio=1.40 / pbratio=1.30 / aq-mode=2 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=1 / colorprim=2 / transfer=2 / colormatrix=2 / chromaloc=0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / hist-threshold=0.03 / no-opt-cu-delta-qp / no-aq-motion / no-hdr10 / no-hdr10-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=0 / analysis-save-reuse-level=0 / analysis-load-reuse-level=0 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00 / scenecut-aware-qp=0conformance-window-offsets / right=0 / bottom=0 / decoder-max-rate=0 / no-vbv-live-multi-pass
Default : Yes
Forced : No
Color range : Full

Using SteamFab go ahead and download the episode from HBO Max or I can upload it to your ftp and check it out….

And when it is compliant like here, then it plays without any issues at all with all the usual players, even Plex….

So when are you going to fix it?

Alex_Videoman

Using SteamFab go ahead and download the episode from HBO Max or I can upload it to your ftp and check it out….

And when it is compliant like here, then it plays without any issues at all with all the usual players, even Plex….

So when are you going to fix it?

Alex_Videoman

BTW Disney + is now also using profile 5 with compliant metadata….
I can also send you a small video to help you fix the bug you have