Periodically, I download a file to see if this is so so far, no AV1 encodes. Why was I trolling Vimeo? Because they promised a few months ago, with great fanfare, that they were encoding their staff picks using the AV1 codec. This morning, however, I downloaded a video from Vimeo and noticed they were encoding with capped CRF with a CRF value of 20, which you can see in MediaInfo below. I hadn’t written this article yet because I figured it was too obscure for most readers. Most of the analysis shown below was for this client (who approved my discussion in an article). Late last year, I consulted with a large OTT shop that used capped CRF encoding with a CRF value of 19 for the top files in the encoding ladder.

If you are using capped CRF encoding (for constant rate factor), however, you almost certainly will find it interesting and perhaps even illuminating.Ī quick background note. If you’re not using capped CRF encoding, or considering the same, it’s almost certainly not of interest. In a blog full of wonky compression articles, this could be the wonkiest article of all.

Ffmpeg scale crf