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Selur's Little Message Board › Hybrid - Support › Probleme und Fragen v
[BUG] NVEnc h.265 - adaptive quantization scheint nicht zu funktionieren

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[BUG] NVEnc h.265 - adaptive quantization scheint nicht zu funktionieren
mogobime Offline
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Posts: 89
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Joined: May 2022
#15
10.06.2026, 21:57
Leider spinnt mein web.de account immer noch, mit dem ich bei github angemeldet bin und ich kann deswegen gerade kein issue eröffnen.
Mir ist mit --loglevel debug nichts ungewöhnliches aufgefallen.
Im Gegenteil, sowohl die lookahead optionen, wie auch die aq optionen werden nochmal brav tabellarisch aufgelistet, ohne das irgendwas bemängelt wird.
Kann natürlich nicht garantieren, dass bei der Menge, die da ausgegeben wird mir nicht irgendwas entgangen ist.
--loglevel error und warning geben bei mir gar nichts aus...

Wenn du willst, kannst du ja ein issue eröffnen, hier ein auf die schnelle entworfener Text, eventuell kann man ja noch die 2 7z files mit den report files anhängen:

I noticed while using --lookahead >0 that changes to the adaptive quantization parameters do not result in any changes to the output file. The generated files always have the same bitrate, regardless of whether, for example, --aq-strength 0, 1, 3, or 13 is specified. Setting --aq-temporal also does not change the bitrate. Is this intended behavior or a bug? I haven't noticed any error messages regarding the set adaptive quantization parameters when using --lookahead >0 with --loglevel debug. Here are some examples from test runs: [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 2][tf-level 4][lookahead 32] -> 6991.40 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 2][tf-level 4][lookahead 32] -> 6991.40 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 2][tf-level 4][lookahead 32] -> 6991.40 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 2][tf-level 4][lookahead 32] -> 6991.40 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 2][tf-level 0][lookahead 32] -> 7746.09 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 2][tf-level 0][lookahead 32] -> 7746.09 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 2][tf-level 0][lookahead 32] -> 7746.09 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 2][tf-level 0][lookahead 32] -> 7746.09 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 1][tf-level 4][lookahead 32] -> 6984.23 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 1][tf-level 4][lookahead 32] -> 6984.23 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 1][tf-level 4][lookahead 32] -> 6984.23 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 1][tf-level 4][lookahead 32] -> 6984.23 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 1][tf-level 0][lookahead 32] -> 8004.16 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 1][tf-level 0][lookahead 32] -> 8004.16 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 1][tf-level 0][lookahead 32] -> 8004.16 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 1][tf-level 0][lookahead 32] -> 8004.16 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 0][tf-level 4][lookahead 32] -> 11830.25 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 0][tf-level 4][lookahead 32] -> 7046.49 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 0][tf-level 4][lookahead 32] -> 5926.45 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 0][tf-level 4][lookahead 32] -> 9508.85 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 13][aq-temporal][lookahead-level 0][tf-level 0][lookahead 32] -> 15583.77 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 03][aq-temporal][lookahead-level 0][tf-level 0][lookahead 32] -> 10368.66 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 00][aq-temporal][lookahead-level 0][tf-level 0][lookahead 32] -> 13042.10 kbps [VBR27.5][preset quality][REF5_5_2][BF4][aq-strength 01][aq-temporal][lookahead-level 0][tf-level 0][lookahead 32] -> 9287.33 kbps [VBR27.5][preset quality][REF5_5_2][BF4][lookahead-level 1][tf-level 0][lookahead 32]                              -> 8004.16 kbps [VBR27.5][preset quality][REF5_5_2][BF4][lookahead-level 2][tf-level 0][lookahead 32]                              -> 7746.09 kbps ----------------------------------------------------------------------------------------------------------------------------------- I use the lastets german NVIDIA RTX Driver Release 595 (R595 U5 (596.59) 2026 Mai 27) Here is the --check-features output of my test system: NVEncC --check-features NVEncC (x64) 9.10 (r3505) by rigaya, Jan 15 2026 11:50:03 (VC 1944/Win)   [NVENC API v13.0, CUDA 11.8] reader: raw, y4m, avi, avs, vpy, avsw, avhw [H.264/AVC, H.265/HEVC, MPEG2, VP8, VP9, VC-1, MPEG1, MPEG4, AV1] others   nvml      : yes   nvrtc      : yes   nvvfx      : yes   ngx        : yes   nvof fruc  : yes   libass    : yes   libdovi    : yes   d3d11      : yes   libplacebo : yes   vmaf      : yes Environment Info OS : Windows 10 x64 (19043) [UTF-8] CPU: AMD FX(tm)-8350 Eight-Core Processor [4.53GHz] (4C/8T) RAM: Used 8590 MB, Total 32660 MB #0: NVIDIA RTX A2000 (3328 cores, 1200 MHz)[PCIe2x16][596.59] NVEnc features Codec: H.264/AVC Encoder Engines          1 Max Bframes              4 B Ref Mode                3 (each + only middle) RC Modes                  3 (CQP, CBR, VBR) Field Encoding            0 (no) MonoChrome                no Alpha Channel            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 4:2:2                    no 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 Temporal Filter          yes Lookahead Level          no Undirectional B          no Temporal SVC              yes MV-HEVC                  no 10bit depth              no Codec: H.265/HEVC Encoder Engines          1 Max Bframes              5 B Ref Mode                3 (each + only middle) RC Modes                  3 (CQP, CBR, VBR) Field Encoding            0 (no) MonoChrome                no Alpha Channel            yes Quater-Pel MV            yes B Direct Mode            no Max Temporal Layers      4 Hierarchial P Frames      no Hierarchial B Frames      no Max Level                186 (6.2) Min Level                30 (1) 4:4:4                    yes 4:2:2                    no 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 Temporal Filter          yes Lookahead Level          yes Undirectional B          yes Temporal SVC              yes MV-HEVC                  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   AV1:        nv12, yv12, yv12(10bit)
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RE: NVEnc h.265 - adaptive quantization scheint nicht zu funktionieren - by mogobime - 10.06.2026, 21:57

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