Netflix/vmaf

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Perceptual video quality assessment based on multi-method fusion.

Stars: 5.5k
Forks: 833
Open beginner issues: 0
Indexed issues: 72
Avg merge: 13h 8m
Merged PRs (30d): 2

Dominant language: C
License: No license data
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

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72 open issues indexed

MSVC Support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Netflix/vmaf#1597 · 2 comments · Opened Sep 17, 2026
mirror()-style boundary reflection reads out-of-bounds for width/height < 3 (motion feature, all backends) Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

Netflix/vmaf#1580 · Opened Aug 13, 2026
Consider adding a minimal CUDA compile check to CI Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Netflix/vmaf#1576 · 1 comment · Opened Aug 11, 2026
Windows: FFmpeg `libvmaf` filter creates a mojibake filename for non-ASCII `log_path` Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

Netflix/vmaf#1568 · Opened Jul 20, 2026
Feature request: CUDA feature extractor for CAMBI Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

Netflix/vmaf#1567 · 1 reaction · Opened Jul 18, 2026
CUDA 16bpc motion kernel applies byte stride as uint16_t element stride — motion2 ~-58%, VMAF ~1.5 points low for all >8-bit input Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

Netflix/vmaf#1566 · Opened Jul 13, 2026
integer ADM: CUDA cm diverges from CPU (border mirror + rounding order) and x86 SIMD dwt corrupts the mirrored last output column — fixes attached Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Netflix/vmaf#1564 · Opened Jul 10, 2026
cuda: motion score diverges from CPU — edge mirror off-by-one in calculate_motion_score_kernel_{8,16}bpc Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Netflix/vmaf#1562 · Opened Jul 10, 2026
Which (V1) Model ? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1561 · Opened Jul 10, 2026
how to use phone model in windows by ffmpeg？ Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Netflix/vmaf#1473 · Opened Mar 19, 2026
Explicitly state stream order in FFmpeg's guide Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

Netflix/vmaf#1469 · 1 comment · Opened Mar 6, 2026
[question] any ways to use this for audio? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

Netflix/vmaf#1457 · Opened Dec 11, 2025
VMAF 训练模型中的vmaf_nr_v0.6.1.pkl 能否用其他版本来替换？ Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

Netflix/vmaf#1454 · 1 comment · Opened Dec 5, 2025
ci: build ffmpeg with cuda vmaf Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

Netflix/vmaf#1448 · 1 comment · Opened Nov 13, 2025
I use vivictpp to compare videos same source and I did compare it with vmaf values Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

Netflix/vmaf#1444 · Opened Oct 30, 2025
First frame always has lower score than expected Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Netflix/vmaf#1431 · Opened Jul 21, 2025
FPS Calculation During VMAF Analysis Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Netflix/vmaf#1426 · Opened May 30, 2025
Issue calculating VMAF using libvmaf_cuda Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Netflix/vmaf#1423 · 1 reaction · Opened Apr 8, 2025
Crash when 2 files are analyzed simultaneously .../src/cuda/common.c:166: vmaf_cuda_buffer_alloc: Assertion `0' failed. Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Netflix/vmaf#1420 · Opened Mar 24, 2025
VMAF score of 100 coming for dolby vision 4K encoded content Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

Netflix/vmaf#1416 · 2 comments · Opened Mar 7, 2025
Fails to build when CUDA is enabled Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Netflix/vmaf#1415 · 1 comment · Opened Mar 3, 2025
float_ms_ssim broken for videos < 176x176 (eg QCIF) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1414 · 1 comment · Opened Mar 2, 2025
Libvmaf: meson setup build error --> Run-time dependency CUDA (modules: cudart_static) found: NO (tried system) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Netflix/vmaf#1401 · 4 comments · Opened Jan 25, 2025
ffmpeg vmaf skipping some frames towards the end randomly Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1400 · 3 comments · Opened Jan 23, 2025
How does VMAF decides how many threads to use Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

Netflix/vmaf#1394 · 4 comments · Opened Oct 23, 2024
libvmaf=model_path=model/vmaf_v0.6.1.json could not open file: (null) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Netflix/vmaf#1388 · 3 comments · Opened Sep 20, 2024
VMAF CUDA `vmaf_cuda_picture_free()` Assertion `0` failed Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1381 · Opened Jul 15, 2024
VMAF CUDA build fails in Ubuntu 22.04LTS Docker image Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Netflix/vmaf#1379 · Opened Jul 11, 2024
Models are the same as those 4 years ago? Open

Netflix/vmaf#1356 · 5 comments · 1 reaction · 1 assignee · Opened Mar 26, 2024
Feature request: Allow the VMAF CUDA back-end to be built via clang and LLVM as an alternative to the full CUDA SDK. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Netflix/vmaf#1329 · 3 comments · Opened Feb 6, 2024
It appears that there may be a bug in the libvmaf CUDA implementation. Open

cuda

Difficulty 4/5 3-5 days Newbie friendliness 30/100

Netflix/vmaf#1305 · 4 comments · Opened Jan 12, 2024
libvmaf with CUDA -- how to build for Windows Open

cuda

Difficulty 5/5 Over a week Newbie friendliness 25/100

Netflix/vmaf#1301 · 8 comments · Opened Jan 8, 2024
CUDA-VMAF Memory Leak（preallocation method） in libvmaf Open

cuda

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Netflix/vmaf#1300 · 3 comments · Opened Jan 4, 2024
CI fails on every release Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Netflix/vmaf#1278 · 2 comments · Opened Dec 8, 2023
Confusion on usage of vmaf_model_colllection_load Open

Difficulty 3/5 1-2 days Newbie friendliness 32/100

Netflix/vmaf#1276 · 1 comment · Opened Dec 5, 2023
Dictionary ownership model seems error prone Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Netflix/vmaf#1242 · 3 comments · Opened Oct 30, 2023
libvmaf with CUDA -- how to build and use Open

cuda

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Netflix/vmaf#1227 · 9 comments · 4 reactions · Opened Aug 18, 2023
Request: Vulkan feature extraction Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Netflix/vmaf#1223 · 2 comments · 3 reactions · Opened Aug 12, 2023
Request: Support for build cuda support for libvmaf using ffnvcodec Open

cuda

Difficulty 4/5 3-5 days Newbie friendliness 30/100

Netflix/vmaf#1220 · 2 comments · 1 reaction · Opened Aug 8, 2023
Strange issue observed calculating VMAF metric values using libvmaf in CUDA mode Open

cuda

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1180 · 4 comments · Opened Apr 18, 2023
VMAF score of 100 for pictures with artefacts Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1165 · 6 comments · Opened Feb 3, 2023
Request: CUDA feature extraction for Windows Open

cuda

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Netflix/vmaf#1154 · 14 comments · Opened Jan 12, 2023
Request for web assembly optimized implementation of vmaf's compute intensive functions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Netflix/vmaf#1144 · 1 comment · Opened Dec 21, 2022
Libvmaf Feature request: List of built in models Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Netflix/vmaf#1128 · 7 comments · Opened Nov 30, 2022
Wrong PSNR and VMAF values in FFmpeg 5.1.1 Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Netflix/vmaf#1109 · 6 comments · Opened Oct 31, 2022
How to build libvmaf.lib for use with Visual Studio Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Netflix/vmaf#1097 · 2 comments · Opened Sep 26, 2022
Build libvmaf fail Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Netflix/vmaf#1066 · 1 comment · Opened Jul 18, 2022
Don't throw exception in svm.cpp Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

Netflix/vmaf#1051 · 4 comments · 1 reaction · Opened Jul 1, 2022
PSNR-HVS generates nan value on 16 bitdepth Open

Netflix/vmaf#1032 · 1 assignee · Opened May 28, 2022
Concerns over AOM CTC CIEDE2000 hue scale factor Open

Netflix/vmaf#1028 · 4 comments · 1 assignee · Opened May 19, 2022

Netflix/vmaf

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