ffmpeg-debug-qp
vmaf
| ffmpeg-debug-qp | vmaf | |
|---|---|---|
| 1 | 41 | |
| 70 | 4,214 | |
| - | 1.1% | |
| 2.3 | 8.8 | |
| about 1 year ago | 8 days ago | |
| C | Python | |
| GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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ffmpeg-debug-qp
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Is there a way to tell which file is higher quality without a 'source' file?
Another approach - extracting, computing, and then comparing quantizer parameter values amongst input files. This is a proxy for "how much high-frequency information was encoded" by a given macroblock. This is a handy tool for doing that: https://github.com/slhck/ffmpeg-debug-qp
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
What are some alternatives?
scrcpy - Display and control your Android device
Av1an - Cross-platform command-line AV1 / VP9 / HEVC / H264 encoding framework with per scene quality encoding
FFmpeg - Mirror of https://git.ffmpeg.org/ffmpeg.git
staxrip - 🎞 Video encoding GUI for Windows.
mpv - 🎥 Command line video player
FFmpeg-Builds
obs-studio - OBS Studio - Free and open source software for live streaming and screen recording
FFmpeg-Builds - FFmpeg Builds for yt-dlp
ffmpeg-libav-tutorial - FFmpeg libav tutorial - learn how media works from basic to transmuxing, transcoding and more. Translations: 🇺🇸 🇨🇳 🇰🇷 🇪🇸 🇻🇳 🇧🇷
ssimulacra2 - SSIMULACRA 2. Perceptual metric.
Pulsar-VMAF - Hardware-based VMAF
ffmpeg-quality-metrics - Calculate quality metrics with FFmpeg (SSIM, PSNR, VMAF, VIF)