User reported visible artifacts/blockiness during calls. Root cause:
without an explicit simulcast_layers config, the fork defaulted to
only [180p, 360p] fallback layers below the 1440p top layer - any
minor network hiccup caused a hard cliff straight to blocky 360p
instead of a graceful step-down. Added a 720p middle rung.
VP9 retry deferred: LiveKit uses SVC for vp9/av1 instead of classic
simulcast, and the fork's buildPublishOptions() always builds
simulcast-shaped layers regardless of codec - likely the real reason
forcing vp9 broke calls entirely. Needs a code fix before retrying.
Thore Cimbal
25d1742d61