generateVideoPlaceholder() unconditionally called getThumbnailSettings(),
which queries the database directly (not through any active transaction).
videoProcessor.js's new placeholder fallback can run from inside
processUploadedPhotos' open per-file SQLite transaction (chunked video
upload) -- knex's default SQLite pool has exactly one connection, so
that second, un-transacted query deadlocks against the transaction
holding it, timing out after acquireConnectionTimeout (60s). Reproduced
directly against an isolated SQLite db.
generateVideoPlaceholder now skips the settings lookup entirely when
the caller supplies explicit width/height, and the video fallback
passes the same DEFAULT_THUMBNAIL_WIDTH/HEIGHT the settings lookup
would have fallen back to anyway (now exported for reuse).
Found by codex review.
Paul Nothaft
f6da5ad25e