It was reachable only when the SOURCE was smaller than 720, which is backwards: the rung a phone wants
is the one a 720p master never produces. The hero here is 1280x720 and the only file that existed for
it was 7.8 MB of 720p, served to every device.
`b:a` overrides the preset's 96k with 64k. The audio on a hero loop is ambience, and 64k AAC carries
it — the same argument as the preset's crf 26 for the picture. The rung exists for a phone on a mobile
connection and every kilobit is one it is paying for.
The override goes through av-club's documented contract: a preset supplies the options and anything
passed explicitly wins.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
A photograph here is 189 KB of tufted yarn — high-frequency detail in every pixel, which is the worst
case for any lossy codec and not something a quality setting can fix. Re-encoding the same original
with ImageMagick at the same quality 82 gives 199 KB, so av-club is already slightly ahead of a
reference encoder. The 858 KB Lighthouse wants back is not available without softening the texture
the site exists to sell.
What was available was the wait. Each ladder now carries the picture at 16 pixels wide as a `data:`
URI inside its manifest — 300 to 500 bytes — and the site paints it as the image's own background. It
costs no request, which is the point: a placeholder you have to fetch is a smaller version of the
problem. When the real photograph arrives it paints over its own background and the placeholder is
gone, with no load handler, no class to remove and nothing to clean up if the script never ran. The
blur is the browser stretching 16 pixels across the box.
Videos take theirs from the poster still, before it is deleted — the same frame, so the two agree, and
sharp can read a JPEG where it cannot read an MP4.
── Existing directories are topped up, not rebuilt ──
The obvious move is to make `upToDate` insist on a placeholder, which turns all 62 ladders stale and
re-derives the library: minutes of CPU and 67 MB rewritten to add 400 bytes to each. Every rung in
them is already correct.
So `topUp` makes only the missing piece, and reads `320.webp` rather than the original — already
small, already browser-readable, already rotated. Going back to a 4000×6000 HEIC to produce a
16-pixel picture is the expensive half of a rebuild and precisely what this avoids. A directory with
no small rung is skipped rather than forced.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
`readdir` returns entries in the filesystem's own order — inode order on ext4 —
which is arbitrary and stable only until somebody moves a file.
Harmless for the sync, which does the same work whatever the order. Not harmless
for "Create Gallery": that list becomes the gallery's initial order, and nine
photographs arriving as 05, 08, 01, 07 reads as a bug even though nothing is
wrong.
`numeric` collation, so galeria2 sorts before galeria10 — which is what anybody
naming files that way means.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Moving a file into a folder made the sync look at a new path, find nothing, and
convert it again — minutes of work to produce bytes that already existed a
directory away — while the old folder stayed behind forever, because nothing ever
deleted one.
A move preserves size and mtime, and both are already in the manifest and in the
stat. So the sync indexes what is already derived on that pair, and a file that
has moved has its ladder RENAMED across.
An ambiguous match is refused rather than guessed. Two originals can share a size
and an mtime — a camera dump can write a whole card in one second — and
rebuilding is merely slow where attaching the wrong photographs to a name is
wrong.
Orphans are removed afterwards, and only on a WHOLE-TREE sync. A scoped run knows
about one folder, so everything outside it looks abandoned; deleting on that
basis would take out the library the first time somebody re-synced a subfolder.
Safe otherwise because derived/ is reproducible by definition, which is what its
name has meant since these two folders stopped being called `user` and `treated`.
Both are counted, recorded in the ledger and shown only when they happened, so an
ordinary run stays one short line.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Two things the panel could not answer. A run's state lives in a Map, so a
restart erased it — and with it any record that a file FAILED. That is the gap
the manifests structurally cannot cover: a derived folder records the size,
mtime and variants it was built from, so provenance is already precise, but a
file that did not build has no folder and leaves no trace. Once the watcher is
running, a failure at three in the morning would never be discovered.
So one JSON line per run, appended to media/.sync-log.jsonl. A file rather than
a table because db/schema.ts is emphatic that the connection is the only thing
this plugin stores, and a ledger is losable — re-run and it rebuilds. Beside
derived/ rather than inside it, so wiping derived does not erase the history of
what happened before, which is the comparison it exists for. Written in a
finally, so a run that died still records that it did.
And the line above the button now says what is TRUE rather than what a run once
did: reconcile() walks originals, reads each manifest, and reports current,
missing and changed. It uses upToDate — the same predicate the sync uses to skip
a file — because two definitions of "current" is how a panel comes to say
everything is in step while the next run rebuilds half of it. Missing and
changed are separated because only the second means somebody edited something.
The ledger is not polled. It reads the whole tree, so it loads on arrival and
again when a run stops — the only two moments its answer can change.
Sync also takes an optional folder now, so a subtree can be re-synced on its own
rather than the whole library. The scope is recorded on each run, because "3
built" means different things for one folder and for everything.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
`web-1080` was asked for whenever the source was at least 720 tall, so a 720p
video was upscaled to 1080p — the exact thing the image ladder is careful never
to do. The output was a 14.6 MB file that looks worse than the 7.8 MB one beside
it, and it cost 84 seconds of a single core on an idle box. Under a running sync
that overran av-club's 255 s idle timeout and homepage_video.mp4 failed
outright, which is the only reason the waste was noticed.
A rung is now made only when the source is at least that tall. `web-480` becomes
a floor rather than a rung, so a source smaller than 720 still gets something
instead of nothing or an enlargement. An unreadable height makes everything: a
probe that told us nothing is not evidence the video is small.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A HEIC was being decoded once per rung. av-club is stateless per request, so
seven rungs asked for from the original are seven ImageMagick conversions of it
— measured on fofos at 8.5 s each, against 1.1 s for the resize and encode that
follow. Six of the seven produced a pixel-identical intermediate and threw it
away: about 67 seconds per photograph where 16 would do, paid again on every
future upload.
So when av-club says a format needs converting, convert it ONCE into the staging
directory and cut every rung from that. `needsConversion` is asked rather than
guessed, because which formats are expensive is av-club's fact and a list of
them kept here would go on paying after its build stopped needing it. JPEG and
PNG are untouched — writing a full-resolution intermediate to save six cheap
reads would cost more than it saved.
Concurrency drops to one. Two was chosen to match av-club and is the right
number on a machine with room; fofos has 1.87 GiB of RAM, and two concurrent
12-megapixel decodes left 520 MiB free with 648 MB already paged out. The work
is CPU-bound on a box already at 99%, so the second worker was not buying
throughput — it was buying a second resident bitmap.
And the sharp calls now name their output format properly. `output` takes
`{ format, options }`; passing `{ webp: { … } }` was silently ignored, so
everything built before this encoded at sharp's default quality rather than the
82 asked for.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The mapping: derived/ mirrors originals/ directory for directory, and where
originals holds a FILE, derived holds a DIRECTORY of the same name — extension
included — with the renditions inside it. Keeping the extension is what makes it
total: a.jpg and a.png are different originals and must not share a folder. The
inverse is pure string work, so the filesystem is the record and there is no
second copy of the truth.
Images get a WebP ladder at 320/640/960/1280/1920/2560 plus full.webp, and
nothing is ever upscaled — a rung wider than the original would be a soft file
that srcset then confidently prefers over the sharp one. full.webp always
exists because for a HEIC it is the only browser-readable copy of the picture
there is.
Video gets av-club's web-1080 and web-720 presets by name, plus a poster. Images
are named by width because srcset descriptors are widths; video by height
because that is av-club's vocabulary and nobody misreads 1080.mp4.
The ladder is fixed here and the SITE chooses from it. This never reads
website/src/media/slots.ts — a plugin that knows a website's layout is a plugin
for one website, and that boundary is the difference between a template and
something fofos-shaped.
Each derived folder carries a manifest naming the size and mtime it was built
from, so the sync is idempotent and resumable: a run that died halfway is
finished by running it again. That is what makes an in-memory job acceptable
rather than merely convenient. It builds into <name>.partial and renames, so an
interruption can never leave a folder that looks finished.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
pastilhasandClaude Opus 5