Quote:
Originally Posted by cyberbeing
VSFilter 2.39.5.x repository is on guliverkli2, and is the version bundled and recommended by Aegisub. Guliverkli2 is no longer developed. This is considered the stable version of VSFilter. Pre-buffering in 2.39.5.x doesn't support animation.
xy-VSFilter is a 2.39.5.x fork for performance. Pre-buffering was removed, but caching and other enhancements were added in its place.
VSFilter 2.40.x repository is on MPC-HC but isn't actually stock VSFilter but rather VSFilter Mod + slight changes and bug fixes. Even though the MPC-HC project is active, VSFilter has no devs working on it (except for the occasional minor bug-fix). Pre-buffering in 2.40.x supports animation, but it sometimes causes flickering. Use of VSFilter Mod features in Aegisub should be avoided whenever possible for legacy compatibility when softsubbing. As of 2010, CCCP started bundling this version.
threaded-VSFilter is a 2.40.x fork for performance focused on multi-threading and pre-buffering. Only supports Vista and newer.
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If VSFilter is a dead path and has a shrinking list of advantages over libass, why hasn't there been a migration?
From a multiplatform perspective it makes sense and would unify sub rendering behaviors. Heck, a new ASS spec and tags not exclusive to hardsubbing may come out of it.
It'd be less of a gamble than transitioning to 10-bit during the rise of DXVA/VDPAU with no roadmap for GPU decoding.