Plezy's device profile declares every subtitle format with
`Method: External`, so Jellyfin answers PlaybackInfo with
`DeliveryMethod: External` and a `DeliveryUrl` even for streams embedded
in a direct-played container. Direct play never fetches those URLs, but
the rows kept the delivery URL as `MediaSubtitleTrack.key`, and keyed
rows only match a native track loaded from the same URL. No embedded
track could satisfy that, so `selectSubtitleTrack` reported "still
pending" forever: playback started with subtitles off and logged the
five- and thirty-second waits, and the server's default subtitle had to
be picked by hand on every item.
Restrict sidecar identity to the rows an open actually fetched as
sidecars. A row that stays in the container loses `key` and
`usesExternalDelivery` and matches on metadata again; genuine
`IsExternal` files keep theirs, and remuxed or transcoded renditions
still resolve their sidecars by URL.
Also declare every subtitle format Embed-first so a direct-played
container reports embedded delivery in the first place, and make the
pending contract match its purpose on every backend. The
complete-catalog escape is no longer Plex-only, so a Jellyfin row the
native player has not produced keeps the pass pending instead of
committing an unrelated default and retiring the listener that was
waiting for the real track. A source id absent from the catalog no
longer defers a decision that can never change, and the thirty-second
deadline resolves from what has arrived instead of re-deriving the same
deferral and applying nothing.
close#1696
edde746
126f5e3aa6