LisPi on Nostr: wizard npub12w8zx…qce3p It seems to get referred to as a feature of VP8a & VP9a, ...

wizard (npub1psu…8yry) npub12w8zxt6wp44wjdk7p2scj6l49fra65hk24vt48vcputdaslywmdqkqce3p (npub12w8…ce3p) It seems to get referred to as a feature of VP8a & VP9a, which don't seem to /officially/ be a thing but rather an informal designation for those codecs using a pixel encoding (namely YUV420p) that features an alpha channel.

That sure could be documented more clearly and easily, I've found no authoritative reference mentioning it directly. One just needs to /know/ what the color space encodings supported support, apparently.