Edward Hervey authored Feb 20, 2024 and GStreamer Marge Bot committed Feb 22, 2024

Some subtitle "decoders" had a wrong category of "Parser", which `parsebin`
relies on to identify elements which do not *decode* streams but *parse* them.

This would cause such subtitle decoders to be plugged in within parsebin,
preventing the original stream to be properly used by (more efficient)
downstream decoders or subtitle renderers.

Fixes #1757

Part-of: <!6153>