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148 points ibobev | 1 comments | 06 Sep 25 20:37 UTC | HN request time: 0.206s | source

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smallstepforman ◴[07 Sep 25 06:24 UTC] No.45155865[source]▶

I’ve been using bc7 since 2012, and even have a video codec using bc7 keyframes (we needed alpha videos, even have a patent for it). Our emphasis is not file size, but playback speed. Bc7 renders 20-40% faster than raw rgba32, and we overlay 5-7 videos on screen simultanously, so every boost helps.

We also have custom encoders for the custom video format.

replies(3): >>45156041 #>>45156200 #>>45159790 #

_def ◴[07 Sep 25 07:06 UTC] No.45156041[source]▶

>>45155865 #

Is there some open equivalent of alpha in videos?

replies(1): >>45157047 #

1. the8472 ◴[07 Sep 25 10:45 UTC] No.45157047[source]▶

>>45156041 #

vp9 and avif have alpha, whether it's patented I don't know.

https://pomf2.lain.la/f/kg9r139e.webm needs non-black background, change the <html> element's background-color in developer tools if necessary

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Shipping textures as PNGs is suboptimal