![](https://lemmy.ml/pictrs/image/UPsHLKaDBP.jpg)
![](https://lemmy.ml/pictrs/image/q98XK4sKtw.png)
Actually they both use Discrete Cosign Transform!
PNGs use DEFLATE which is a generic compression standard that exhaustively searches for smaller ways to compact the data.
I would recommend comparing the quality of images of different formats against eachother to see if there is noticeable lossyness.
If the PNGs are indeed better, try to set the initial compression of the PNGs to “zero” and come back later to “crush” them smaller.
Yeah, that makes sense. There might be some useful interface in VAAPI?