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I have been having problems with Hybrid for quite some time, at some point it stopped allowing me to select Multilevel L0/L1 References when using NVEnc. I have used this in the past, I cannot remember where it worked unfortunately. That was many many nVidia driver updates back.
The Multilevel L0/L1 tick box cannot be ticked or slider cannot be adjusted on either H264 or H265 encoding.
Has support for the Multilevel L0/L1 references been removed by nVidia?
Hybrid 2023.03.17.1 on Windows 10 x64
nVidia driver currently 537.13
GTX 1660 Turin Core supporting H.264/H.265 encoding
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04.10.2023, 04:59
(This post was last modified: 04.10.2023, 05:04 by Selur.)
iirc. it was possible to enable it in some versions, even when it did not work, that said.
Check the output of
<Path the Hybrid\64bit\NVEncC.exe> --check-features
and share the output (can be copy&pasted; no screenshot please).
It might also be that NVEnCC changed the way it reports the features, which confused Hybrid.
-> I'll look into it if you share the output of '--check-features' on your system.
Here's how the output looks on my system:
NVEncC (x64) 7.31 (r2580) by rigaya, Aug 28 2023 13:07:12 (VC 1929/Win)
[NVENC API v12.1, CUDA 10.1]
reader: raw, y4m, avi, avs, vpy, avsw, avhw [H.264/AVC, H.265/HEVC, MPEG2, VP8, VP9, VC-1, MPEG1, MPEG4, AV1]
Environment Info
OS : Windows 11 x64 (22621) [UTF-8]
CPU: AMD Ryzen 9 7950X 16-Core Processor [5.50GHz] (16C/32T)
RAM: Used 7648 MB, Total 64632 MB
#0: NVIDIA GeForce RTX 4080 (9728 cores, 2505 MHz)[PCIe4x16][537.42]
NVEnc features
Codec: H.264/AVC
Encoder Engines 2
Max Bframes 4
B Ref Mode 3 (each + only middle)
RC Modes 63 (CQP, CBR, CBRHQ, VBR, VBRHQ)
Field Encoding 0 (no)
MonoChrome no
FMO no
Quater-Pel MV yes
B Direct Mode yes
CABAC yes
Adaptive Transform yes
Max Temporal Layers 4
Hierarchial P Frames yes
Hierarchial B Frames yes
Max Level 62 (6.2)
Min Level 10 (1)
4:4:4 yes
Min Width 145
Max Width 4096
Min Height 49
Max Height 4096
Multiple Refs yes
Max LTR Frames 8
Dynamic Resolution Change yes
Dynamic Bitrate Change yes
Forced constant QP yes
Dynamic RC Mode Change no
Subframe Readback yes
Constrained Encoding yes
Intra Refresh yes
Custom VBV Bufsize yes
Dynamic Slice Mode yes
Ref Pic Invalidiation yes
PreProcess no
Async Encoding yes
Max MBs 65536
Lossless yes
SAO no
Me Only Mode 1 (I,P frames)
Lookahead yes
AQ (temporal) yes
Weighted Prediction yes
10bit depth no
Codec: H.265/HEVC
Encoder Engines 2
Max Bframes 5
B Ref Mode 3 (each + only middle)
RC Modes 63 (CQP, CBR, CBRHQ, VBR, VBRHQ)
Field Encoding 0 (no)
MonoChrome no
Quater-Pel MV yes
B Direct Mode no
Max Temporal Layers 0
Hierarchial P Frames no
Hierarchial B Frames no
Max Level 186 (6.2)
Min Level 30 (1)
4:4:4 yes
Min Width 129
Max Width 8192
Min Height 33
Max Height 8192
Multiple Refs yes
Max LTR Frames 7
Dynamic Resolution Change yes
Dynamic Bitrate Change yes
Forced constant QP yes
Dynamic RC Mode Change no
Subframe Readback yes
Constrained Encoding yes
Intra Refresh yes
Custom VBV Bufsize yes
Dynamic Slice Mode yes
Ref Pic Invalidiation yes
PreProcess no
Async Encoding yes
Max MBs 262144
Lossless yes
SAO yes
Me Only Mode 1 (I,P frames)
Lookahead yes
AQ (temporal) yes
Weighted Prediction yes
10bit depth yes
Codec: AV1
Encoder Engines 2
Max Bframes 7
B Ref Mode 3 (each + only middle)
RC Modes 3 (CQP, CBR, VBR)
Field Encoding 0 (no)
MonoChrome no
Quater-Pel MV yes
B Direct Mode no
Max Temporal Layers 0
Hierarchial P Frames no
Hierarchial B Frames no
Max Level 23 (7.3)
Min Level 0 (2)
4:4:4 no
Min Width 192
Max Width 8192
Min Height 128
Max Height 8192
Multiple Refs yes
Max LTR Frames 4
Dynamic Resolution Change yes
Dynamic Bitrate Change yes
Forced constant QP yes
Dynamic RC Mode Change no
Subframe Readback yes
Constrained Encoding no
Intra Refresh yes
Custom VBV Bufsize yes
Dynamic Slice Mode no
Ref Pic Invalidiation yes
PreProcess no
Async Encoding yes
Max MBs 262144
Lossless no
SAO no
Me Only Mode 0 (no)
Lookahead yes
AQ (temporal) yes
Weighted Prediction no
10bit depth yes
NVDec features
H.264/AVC: nv12, yv12
H.265/HEVC: nv12, yv12, yv12(10bit), yv12(12bit), yuv444, yuv444(10bit), yuv444(12bit)
MPEG1: nv12, yv12
MPEG2: nv12, yv12
MPEG4: nv12, yv12
VP8: nv12, yv12
VP9: nv12, yv12, yv12(10bit), yv12(12bit)
VC-1: nv12, yv12
AV1: nv12, yv12, yv12(10bit)
Cu Selur
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Joined: Dec 2021
Thanks, my features look the same as your RTX 4080 except for mine not supporting AV1 at all. Everything else looks identical.
When I used Hybrid some before my current install the Multilevel Refs could be selected one minute and then just after they could not be used. I tried uninstalling, reinstalling and replacing the settings files which did restore the Multilevel Refs for one encode and after that they became unavailable again until I closed Hybrid and replaced the settings files. Very annoying doing one encode and having to repeat the process. Now I have been unable to use the Multilevel Refs at all on this current Windows install.
I can see that my NVEncC is an older version than the one that you are using, 7.21 compared with 7.31. If you need any further diagnostic info then you only need to ask.
$ NVEncC.exe --check-features
NVEncC (x64) 7.21 (r2490) by rigaya, Mar 13 2023 14:18:26 (VC 1929/Win)
[NVENC API v12.0, CUDA 10.1]
reader: raw, y4m, avi, avs, vpy, avsw, avhw [H.264/AVC, H.265/HEVC, MPEG2, VP8, VP9, VC-1, MPEG1, MPEG4, AV1]
Environment Info
OS : Windows 10 x64 (19044) [UTF-8]
CPU: Intel Core i7-3770K @ 3.50GHz (4C/8T)
RAM: Used 15973 MB, Total 32641 MB
#0: NVIDIA GeForce GTX 1660 (1408 cores, 1845 MHz)[PCIe3x16][537.13]
NVEnc features
Codec: H.264/AVC
Encoder Engines 1
Max Bframes 4
B Ref Mode 3 (each + only middle)
RC Modes 63 (CQP, CBR, CBRHQ, VBR, VBRHQ)
Field Encoding 0 (no)
MonoChrome no
FMO no
Quater-Pel MV yes
B Direct Mode yes
CABAC yes
Adaptive Transform yes
Max Temporal Layers 4
Hierarchial P Frames yes
Hierarchial B Frames yes
Max Level 62 (6.2)
Min Level 10 (1)
4:4:4 yes
Min Width 145
Max Width 4096
Min Height 49
Max Height 4096
Multiple Refs yes
Max LTR Frames 8
Dynamic Resolution Change yes
Dynamic Bitrate Change yes
Forced constant QP yes
Dynamic RC Mode Change no
Subframe Readback yes
Constrained Encoding yes
Intra Refresh yes
Custom VBV Bufsize yes
Dynamic Slice Mode yes
Ref Pic Invalidiation yes
PreProcess no
Async Encoding yes
Max MBs 65536
Lossless yes
SAO no
Me Only Mode 1 (I,P frames)
Lookahead yes
AQ (temporal) yes
Weighted Prediction yes
10bit depth no
Codec: H.265/HEVC
Encoder Engines 1
Max Bframes 5
B Ref Mode 3 (each + only middle)
RC Modes 63 (CQP, CBR, CBRHQ, VBR, VBRHQ)
Field Encoding 0 (no)
MonoChrome no
Quater-Pel MV yes
B Direct Mode no
Max Temporal Layers 0
Hierarchial P Frames no
Hierarchial B Frames no
Max Level 186 (6.2)
Min Level 30 (1)
4:4:4 yes
Min Width 129
Max Width 8192
Min Height 33
Max Height 8192
Multiple Refs yes
Max LTR Frames 7
Dynamic Resolution Change yes
Dynamic Bitrate Change yes
Forced constant QP yes
Dynamic RC Mode Change no
Subframe Readback yes
Constrained Encoding yes
Intra Refresh yes
Custom VBV Bufsize yes
Dynamic Slice Mode yes
Ref Pic Invalidiation yes
PreProcess no
Async Encoding yes
Max MBs 262144
Lossless yes
SAO yes
Me Only Mode 1 (I,P frames)
Lookahead yes
AQ (temporal) yes
Weighted Prediction yes
10bit depth yes
NVDec features
H.264/AVC: nv12, yv12
H.265/HEVC: nv12, yv12, yv12(10bit), yv12(12bit), yuv444, yuv444(10bit), yuv444(12bit)
MPEG1: nv12, yv12
MPEG2: nv12, yv12
MPEG4: nv12, yv12
VP8: nv12, yv12
VP9: nv12, yv12, yv12(10bit), yv12(12bit)
VC-1: nv12, yv12
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Try resetting the tool cache.
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I did try that before when it was working for one encode and not for others and it didn't fix anything. I have tried it again, it reset everything including all my settings and it has not altered anything. I have also tried it just for the NVEnc model but again without any alteration.
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I'll look at it tomorrow, probably some typo somewhere. 
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Joined: Dec 2021
Thank you for your help.
Would it help if I tried older versions to see which worked without problems? I was not having these problems many releases back but I don't know which one it was that work 100%. If I knew which ones will work with my current system, Windows 10 and drivers then it would make it a little easier rather than uninstalling and reinstalling repeatedly.
I have the following builds and I know that at least one or more have worked in the past with earlier nVidia drivers. I did use one on Windows 7.
Hybrid_2020.12.13.1_SETUP_Win7
Hybrid_2021.01.31.1_SETUP
Hybrid_2021.04.12.1_SETUP
Hybrid_2021.07.18.1_SETUP
Hybrid_2021.12.05.1_SETUP
Hybrid_2022.03.20.1_SETUP
Hybrid_2023.03.17.1_SETUP
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05.10.2023, 05:04
(This post was last modified: 05.10.2023, 05:42 by Selur.)
No, need, it's probably easy to trace and find, will look at it after work.
(had a quick look, I know where the issue is - detected settings are not properly saved - but I need to check where exactly it breaks)
Cu Selur
Posts: 10.981
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Joined: May 2017
Think I fixed it. (was a mixup due to some typo which caused Hybrid to not properly read the toolcache infos.)
Send you a link for testing via pm.
Cu Selur
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Joined: Dec 2021
It definitely works correctly in Hybrid 2021.01.31.1 but that version is missing many features than newer builds including the cut support to make testing quicker.
That version also doesn't seem to get near to the specified bitrate when using NVEnc and it also doesn't seem to follow the 2 pass full option when specified. It only seems to do 1 pass encoding. I specified 1500 kbps Constant bitrate 2 pass encoding and it totally ignores it and does 1 pass. I have tried both encoding to a file size and to a target bitrate. Only the variable and constant bitrate allow selecting 2 pass encoding whereas the Variable HQ or Constant HQ do not allow 2 pass to be selected. It's the same with H.264 & H.265, none do 2 pass. Is this a known issue?
(05.10.2023, 15:31)Selur Wrote: Think I fixed it. (was a mixup due to some typo which caused Hybrid to not properly read the toolcache infos.)
Send you a link for testing via pm.
Cu Selur Thanks, that seems to of fixed it, it has completed several small encodes successfully.
There still is the problem with 2 pass not working though but I can post that to a new thread and ask whether it is supposed to do what I believe it should do.
It does also seem to of fixed the default container where it would always start with mp4 even though the standard output container was set to mkv in the options.
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