Unusually good compression ratio - Sanity Check

• ssimulacra2

  5 134 3.1 C++

  SSIMULACRA 2. Perceptual metric.

  

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.

• video-compare

  10 810 9.2 C++

  Split screen video comparison tool using FFmpeg and SDL2

  

If you need to compare images easily, consider slow.pics. Or ICAT, or Video Comparison Tool. And actually, even x264 and x265 don't have perfect CRF scales as well, they are offset by a constant iirc.

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• vmaf

  41 4,189 8.9 Python

  Perceptual video quality assessment based on multi-method fusion.

  

You can try VMAF as well (which ffmpeg supports). It's normally recommended to make a lossless copy first as a baseline too

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