vmaf
ssimulacra2
vmaf | ssimulacra2 | |
---|---|---|
41 | 5 | |
4,214 | 136 | |
1.1% | 3.7% | |
8.8 | 3.1 | |
6 days ago | about 1 month ago | |
Python | C++ | |
GNU General Public License v3.0 or later | BSD 3-clause "New" or "Revised" License |
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vmaf
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Extreme Video Compression
Netflix did VMAF for this: https://github.com/Netflix/vmaf
It checks a reference video against an encoded video and returns a score representing how close the encoded video appears to the original from a human perspective.
- Netflix/VMAF – Release v3.0.0
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Linux GUI/Frontend for VMAF
Not sure this is the right sub but I'm going to encode my entire BluRay collection in AV1 / NVEC. I'd like to optimize settings with VMAF but would like an ubuntu/debian based GUI to work with.
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Does anybody run libvmaf on your output as a validation check?
VMAF for anybody that doesn't know quantifies the quality difference between a source and modified video.
- How do you guys visually compare clips?
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reduce video filesize
Netflix even has a method to measure perceivable quality difference. A little while ago I used this tool to calculate this.
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How did my silly little After Effects filter reduce the file to 10% its size? The footage wasn't raw or 10-bit or anything, and I rendered it out at basically the same resolution (cropping aside). How did I do this????
Well you can use something like https://mediaarea.net/en/MediaInfo to look at the files and https://github.com/Netflix/vmaf to see if there is no loss.
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[HUB] Reddit Users Expose Steve: DLSS vs. FSR Performance, GeForce RTX 4070 Ti vs. Radeon RX 7900 XT
Vmaf exists
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4:2:0 10-bit HEVC vs 4:2:2 10-bit AVC codecs higher quality? (S5II, GH6)
You can try some tests https://github.com/Netflix/vmaf
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Unusually good compression ratio - Sanity Check
You can try VMAF as well (which ffmpeg supports). It's normally recommended to make a lossless copy first as a baseline too
ssimulacra2
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Extreme Video Compression
https://github.com/cloudinary/ssimulacra2?tab=readme-ov-file... shows a higher correlation with human responses across 4 different datasets and correlation metrics for 1
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H265 vs AV1 - Experiments in Python
Very well written. As others have suggested, you should do a followup using modern perceptual quality metrics like VMAF and ssimulacra2.
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A better compact image placeholder hash
I was thinking about that too. Can't answer the question, but I did come across this just the other day: https://github.com/cloudinary/ssimulacra2 Supposedly good for comparing image similarity. Might depend on your use-case, I think it's geared towards image quality moreso than similar photos.
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Unusually good compression ratio - Sanity Check
That's the kind of feedback I was looking for, thanks. I usually go by eye, but at 14:1, I was expecting a blurry artefact-ridden mess, and it just didn't look all that bad at first blush.... I'll definitely check out ssimulacra2, thanks for the suggestion. I also need to sit down and do some proper pixel-peeping on a better screen... I think my monitor falls into the 'HD-aren't' class of HDR displays, so I'm likely missing detail somewhere. My purpose is archival, I want to preserve quality but not needlessly waste drive space on less efficient codecs. I'm not concerned by the resultant bit rate, so long as it has improved compression efficiency over the original.
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examples of hardware vs software AV1 encodes?
The fork to build - rust-av/ssimulacra2_bin | original release (works on images only) with a lot of info about the metric - cloudinary/ssimulacra2
What are some alternatives?
Av1an - Cross-platform command-line AV1 / VP9 / HEVC / H264 encoding framework with per scene quality encoding
video-compare - Split screen video comparison tool using FFmpeg and SDL2
staxrip - 🎞 Video encoding GUI for Windows.
ssimulacra2_bin - Binary interface for the ssimulacra2 Rust port
FFmpeg-Builds
Primitive Pictures - Reproducing images with geometric primitives.
FFmpeg-Builds - FFmpeg Builds for yt-dlp
unpic-placeholder - Pure-CSS image placeholders
ffmpeg-debug-qp - FFmpeg Debug Script for QP Values
lqip-modern - Modern approach to Low Quality Image Placeholders (LQIP) using webp and sharp.
Pulsar-VMAF - Hardware-based VMAF
UTEX.js - A fast tiny tool for working with compressed textures