A share link is opened on whatever the friend holds. Measured on an iPhone and an iPad: AV1,
Matroska, HEVC tagged hev1 and MP3 inside an .mp4 fail there; Chrome and Firefox add HEVC and
10-bit / 4:4:4 H.264. The old check judged the codec NAME only and ran on downloads only, so a
10-bit H.264 passed, an upload went out exactly as it came (an iPhone's HEVC .mov, a webm, an mkv)
and a fast trim kept its source's codecs.
One rule now, `downloads/playable.py`: video is H.264 8-bit 4:2:0 + AAC in .mp4, audio-only is
.mp3 or AAC .m4a; `plan` says what must change, `build_cmd` re-encodes only the failing stream (or
remuxes). The worker applies it to a download, an editor clip and — new — an upload: media that
fails the rule is queued (asset pending, job queued) and the worker converts it, keeping only the
converted file (owner's choice). Until then the original sits at rel_path, so Retry starts from it
and a delete removes it; an upload that lost its last holder mid-conversion is reaped by the GC.
Every libx264 run (edit, concat, conversion) now pins `-pix_fmt yuv420p` — without it a 10-bit
source came out High 10. The download cache signature moves to v5 so a cached 10-bit asset
re-derives. The upload toast says when the file is still converting (HU/EN).
Tests: the plan for every measured class; real ffmpeg turning a 10-bit Matroska + Opus and an
mp3-in-mp4 into files the rule accepts (red without the pixel-format pin); the queued upload's
delete, cancel-then-GC, failed conversion and real worker conversion (the cleanup tests red
without their rules); the toast (red without the branch). Live on localdev: 9 fixture uploads
converted, every served file probed H.264 High yuv420p + AAC, or mp3 / m4a.
The code cited its plan instead of saying why: `E28 review J4`, `(R6 S3b)`, `S1 justified…`,
`deep-review round 5`. That plan lives in the private ops repo, so for every reader of this one the
citation was noise, and a sentence whose subject was the plan step ("round 2 showed…") hid its
lesson behind an id. Each one is gone and the "why" kept: a bare citation is deleted, a sentence
carrying a lesson is reworded around it ("a later attempt showed…").
Measured (`scripts/audit_metrics.py`, product code): 652 lines in 270 files carried an epic code by
the definition the next commit holds (507 / 241 by the old, two-digit-only one) -> 0. Across all
code, tests, scripts and configs: ~1100 epic-code lines plus ~320 sprint/round ids.
Behaviour unchanged, checked mechanically: every changed .py file has the same AST once docstrings
are blanked; css/sh/toml/yml/json files are identical once comments are stripped; the only
non-comment changes in TS/JS are test titles, one description string in a contract table, and five
ESLint messages, whose text is all the gates snapshot diff holds. Not touched: Markdown (docs and
the changelog keep their history), Alembic migrations, TV episode notation (`S2 · E5`), DESIGN.md
ids (`C1`, `B4`, `S3h`), tracker ids (`SEC-16`, `DX-17`).
One stale claim fixed on the way: test_hls_reaper's docstring said the player checkpoints "every
10 s whether or not it is playing", which plex/stream.py calls wrong; it now says what the code does.
- The download and edit failure lines go back after their DB write: a job the
write could not fail is not a failed job, and the worker's child_exit line
already says it failed.
- The download child's runner is the last stop before Python's hook: an
escaping exception is one download.child.failed line with its chain scrubbed,
then exit 1, instead of a raw stderr traceback carrying the URL.
- A crash the database will not record carries its stack once, and the
fail-write line has an event code.
- The job's own generic-extractor name is taken out as a literal (formats.hiding),
so brackets and colons in a direct link's file name no longer leak; the
pattern stays as the fallback. `Downloading just the video <id>` is covered.
- Tests: scrubbed_stack's cause, suppress, unprintable and text-format paths,
the image steps' failure kinds, the watchdog error through the real
_fail_running, exact poster/storyboard messages, ffmpeg skip marker.
- A failure keeps its traceback unless it is yt-dlp's or our own StatedFailure (a
message that is the whole story). A plain RuntimeError, RecursionError or OSError
is also what a bug of ours raises, and its stack is the only lead.
- The stack is scrubbed link by link (logs.scrubbed_stack): a chained DownloadError
under a DB error no longer prints yt-dlp's text unscrubbed.
- Engine hide_parameters: a DB error's message no longer carries the title or path
it was writing.
- The download and edit failure lines go out even when their DB write fails.
- The worker's child_exit/crash/supervisor lines say download.job.failed only when
the job failed there; a crash the DB will not record no longer ends the thread.
Stopping a paused child is download.child.stopped, not a second abort.
- log_safe also covers generic ids with spaces, playlist titles and bare ids.
- The ffmpeg image steps log the failure kind, not the argv with its path.
- The consent contract accepts only the body of a plain consented_trace() check,
and any level that may be TRACE.
- Tests for each; every one mutation-checked.
- yt-dlp's text is scrubbed wherever it is logged, not only in the adapter:
`formats.log_safe` takes out the URL, the `[extractor] <id>:` prefix and
file paths, and the job-failed, refused, edit-failed and backfill lines use
it. Done lines log the asset id, not the title-built path. The PII contract
now bans `rel`/`rel_path`/`title`.
- A traceback goes with a download/edit failure only when it is our own code
failing; for yt-dlp's DownloadError, our RuntimeErrors and OSErrors its foot
is the unscrubbed message.
- yt-dlp's `error` maps to WARNING: it fires on attempts the fallback client
set recovers from; the job's verdict is `download.job.failed`.
- The sink groups a bare `%s` pass-through by its text (numbers folded), and
a process's last batch closes the repeat window, so a short-lived download
child still reports what it dropped.
- Worker-side failures (stall, wall-clock, no asset, cached asset error) log
`download.job.failed` with a cause; they left no line at all before. The
crash, supervisor-error and non-zero-exit lines carry the code too.
- An edit failure is one coded line in `_fail_edit`, for every path.
- `logs.get_logger("__main__")` resolves to the `-m` module, so the worker
and the download child keep their names.
- TRACE lines carrying user content are gated on `logs.consented_trace()`,
not on the process level; a contract test pins it.
- The OAuth token refresh goes through `_upstream_failure`; transport errors
carry reason `transport`. Subscribe recognises a duplicate by reason code
only (the prose fallback was dead).
- Once-only guards for a stale sysconfig override and a refusing HLS session
directory; item_detail splits Plex failures from our own parse bugs.
- The playlist breaker line names the playlist and the action; comments that
were false (runner noqa, `_merge_vtt`, sink grouping) are corrected.
The gap this sprint was scoped against turned out to be smaller than the survey
said, and in a way worth writing down: `log_requests` already records every HTTP
call with its route template, status, duration, request id and user id, and the
audit log already records every admin act on someone else's account. Putting a
line in each of routes/downloads.py's twenty mutating endpoints would have added
a second copy of the first and nothing else. So this instruments what neither of
them can see.
yt-dlp now explains itself to our log. `quiet: True` was doing more than quieting:
with no `logger` its whole account of a download went to the child's stdout, so
"Requested format is not available", a signature-extraction failure or a POT
refusal reached us only as whatever text ended up in the raised exception — the
real reason a download failed was routinely one line the app never kept. Measured
against the pinned yt-dlp 2026.07.04 before wiring it: with `logger` set it calls
`debug` for extraction and progress lines and `warning`/`error` for the rest, and
neither `quiet` nor `no_warnings` gates those calls. `debug` lands at TRACE, being
several lines a second, so the noisy half is the half the user's own consent
gates. The full source URL is trimmed to its host on the way in — it is a row of
someone's download history, and `logs.set_job` already puts the job id on every
one of these lines. The option is set AFTER the adapter merge, like `cookiefile`
and the size cap: a source adapter must not be able to take away the one account
of what went wrong that a failed job leaves behind.
An HLS session now says which pipeline it got (transcode/remux, hw, tonemap,
variants, offset) — everything downstream is about that choice, and it was only
inferable from an ffmpeg command line nobody keeps. A session culled by the
concurrent-transcode cap says so: somebody's playback stops there, the route turns
it into a retryable 404, and "my film keeps rebuffering" had no other explanation
anywhere. The HW→SW fallback keeps its line and gains an event code.
A live search refused by a quota cap says WHICH cap: the 429 is in the request
line either way, but the per-user daily cap is answered by tomorrow and the shared
budget by the admin.
The download and edit job lifecycle lines gain event codes, which is what E22.6's
console filters on — the job id was already a structured field.
tests/test_ytdlp_logging.py; three of its four cases mutation-checked. A fourth
(a `%` in a progress line) survived its mutation — stdlib only applies `%`
formatting to a record that has args — so it is gone rather than kept as a case
nothing can break; the reasoning moved into the comment on `_emit`.
114 exception handlers neither logged nor re-raised. The defect was never that
they are silent — plenty of them should be — it is that their silence said
nothing, so nobody could tell a decision from an oversight. Each one has now been
read. 44 got a line; the other 70 carry `# silent-ok: <why>`.
What the silent ones had been hiding, in the cases that got a line:
- A failed ffprobe sent every HDR file down the 8-bit pipeline, so playback
degraded to a software transcode with nothing saying why; a failed audio probe
collapsed a multi-audio file to one track and the player showed no language
picker; a failed first-PTS probe left subtitles seconds out of sync.
- A subtitle sidecar that existed but would not parse made a PARTIAL track read as
complete, permanently — the viewer loses every cue past the cached window.
- An unreadable crop/trim/cut-list in an edit spec was dropped, so the clip came
out uncropped, untrimmed, or shorter than the one the user built.
- A dropped `max_height` downloaded at best quality against an explicit cap.
- A failed videos.list enrich made every candidate undroppable-from-judgement and
therefore dropped: a working search rendered as "no results".
- An unusable password hash answered as "wrong password", locking the owner out
and telling them they mistyped; a rotated TOKEN_ENCRYPTION_KEY turned every
stored token into "not connected".
- A stored admin setting that would not coerce fell back to the env default while
the settings page went on showing the saved value.
- A one-off InnerTube config failure pinned the whole process to the hard-coded
fallback key, and searches return nothing when that goes stale.
- The HLS sweep reported 0 swept — like a clean run — when it could not list its
own root, leaving every crashed session's segments on disk forever.
Four of them are counted rather than logged per item (dropped cues, dropped cut
list segments, unreclaimed GC files) and reported once per call, because the
alternative is one line per cue over a whole subtitle track.
ruff gains S110 and BLE001. Every blind `except Exception` that remains carries
`# noqa: BLE001 — <why>`, which is the point: catching everything is sometimes
right, and always worth a sentence. plex/sync.py's three best-effort backfill
catches now keep the traceback — a blind catch over a batch that fetches AND
writes could be Plex, the database or our own bug, and `%s` of the exception told
them apart badly. main.py's boot-time log-level read likewise.
logs.event's `code` is positional-only now: `event("x", code=...)` was a TypeError,
and `code` is exactly the word a caller reaches for when the thing that failed has
one of its own.
tests/test_swallowed_exceptions.py is the wider rule ruff cannot see: a handler
that neither logs nor re-raises must say why. Both cases mutation-checked — a
marker removed and a log line removed each fail it, naming the handler.
Deep-review round 2 over main..improvement/watch-background-audio.
Account resolution (server)
- A request naming an account that is no longer signed in to this browser
(X-Siftlode-Account or ?account=) now acts as nobody instead of the
session's default account. A tab still pinned to an account signed out in
another tab went on acting as the default: its player checkpoints and
preference saves landed in that account, the messages socket and Plex
playback ran as it, and its Sign out signed THAT account out. A hidden tab
never polls /api/me, so a tab playing in the background kept doing it.
The /api/me bootstrap probe alone keeps the fallback, which is how such a
tab learns who it now is: the app's 401 handler reloads, and BootGate
re-pins the tab.
BootGate
- On an identity change the tab reloads without moving its pin first. The
tree being torn down still runs its unmount saves before the page goes,
and with the pin already moved they wrote into the new account's local
keys (a player volume still pending). The reloaded page corrects the pin.
Share page (/watch)
- Only a 404 says the link is gone. A 5xx, a dropped connection, and the
unlock's own rate limit all rendered "no longer available ... expired or
revoked" to a viewer with a valid link, with no way to try again. A load
failure now offers Retry; too many password tries says so and keeps the
form; an unlock that gets no answer says so instead of doing nothing.
Strings in en/hu/de.
Downloads
- A cookie-authed asset is recognised under the current signature version
and the one before it, so a job queued before a deploy that bumps the
version still downloads with its cookie instead of failing on the login
wall with an error that says no cookie was used.
The app chunk is preloaded through lazyWithPreload, so a failed fetch no
longer leaves an unhandled rejection beside the ErrorBoundary. The panel
layout seed is one helper (seedLayout).
Tests: the stale-tab refusal, its harmless Sign out and the probe fallback;
the pre-bump authed asset; BootGate keeping the pin on reload and staying
mounted through a same-account change; the reveal clock's later-commit
hand-off; the prefs, panel layout and demo-scope seeds from the me cache;
the share page's failure states. Each mutation-checked RED for its own
reason.
Since a Facebook cookie was added on prod, every reel came down titled
"Video": measured on dev, a signed-in read gives yt-dlp the placeholder
"Video" (an 18+ reel read as Chrome gives "Facebook") while the post's text
is still in the description. A new SourceAdapter.title hook takes the whole
first line of the description in that case, and both title writes (the early
fill and the finished download) go through it, so the row, the file name and
the share preview carry the post's text again. The line is not cut with an
ellipsis: normalize_title's NFKC turns "…" into "..." and collapses it to
".", which read as a finished sentence (seen in dev UAT).
The "Audio (MP3)" profile's extracted .mp3 was remuxed into an .mp4 by the
browser-safe step (the audio spec is clamped to container mp4 too) and served
as video/mp4, which iPad's WebKit will not play (prod job 268). Audio mode now
skips that step, so an .mp3 is served as audio/mpeg and an .m4a as audio/mp4.
Audio downloads version their cache identity on their own (v5), so a cached
remuxed audio re-derives without re-downloading every cached video.
Round five. 47 -> 34 -> 15 -> 7 -> 6 raw findings, and this round's sharpest was the
loop's own blind spot: **the branch did not pass the gate.** `prettier --check` is one of
its eight lanes and I had been running the other seven, so an unformatted `onError` from
round one sat on the branch for four rounds — `siftlode publish` would have refused it,
with no --skip flag to get past.
**The restart hint could still strand the restored data.** Round four said the scripts no
longer print a command they cannot resolve; they did. The COMPOSE_FILE fallback only fires
when `docker-compose.yml` is ABSENT, so in a source checkout it never fires and the hint
expanded to a bare, pasteable `docker compose up -d` — which reads the other file, whose
volumes are `pgdata`/`downloads` rather than `siftlode_pgdata`/`siftlode_downloads`, and
recreates the database on an empty one. When the file is unresolved the scripts now print
`-f <the compose file you started with>`: not runnable, which is the point.
**A comment naming the wrong owner.** `formats.py` still said a zero budget is "a refusal
for enqueue to make" — the premise round one disproved, three files away from the two
docstrings that now say the opposite. Anyone acting on it would delete the worker's refusal
and re-open the original inversion, so it now says where the refusal actually lives.
Also: the reset-flag rule was rewritten in three consecutive rounds and pinned by nothing —
two tests now cover a fragment losing its token, both by a pasted verify link and by
navigating away entirely; `backup.ps1` deletes a partially-copied dump before throwing, the
guard round four gave the docs but not the script it mirrors; and one comment that read as
if the asset were untouched by a line four below it.
Gate green, all eight lanes: ruff, ruff format, 3x tsc, eslint, prettier, knip,
vitest 687, pytest 950.
SEC-12: the download box accepts an arbitrary http(s) URL and yt-dlp fetches
it from the WORKER, so any approved user could aim the server at the compose
network, the LAN or a cloud metadata endpoint — and read the result off
job.error, where "connection refused" vs "HTTP Error 401" vs "timed out" is a
port scanner. downloads/urlguard.py refuses a URL whose host resolves to a
loopback/private/link-local/reserved address, at enqueue AND again in the
worker (DNS can move in between, and the worker is where the socket opens).
A network-class failure on a `url` job now reports one fixed sentence instead
of the raw transport text; the error CODE is still classified from the
original, so the localized explanation is unchanged. DNS rebinding is
explicitly NOT closed — that needs the connection gated inside yt-dlp — and
the module says so rather than implying more than it does.
SEC-13: `noplaylist` only demotes a video-inside-a-playlist URL to that video,
so a URL that is purely a playlist or channel still expanded into every
entry — one enqueue, unbounded downloads. `playlist_items` pins it to one.
Size was unbounded too: `check_enqueue` compares the CURRENT footprint against
the cap, and a download's size is unknown until it lands, so one job could
overshoot by any amount; the owner's remaining budget is now handed to yt-dlp
as `max_filesize`, applied AFTER the adapter merge so no source adapter can
raise a limit the quota layer set. A join's cut-list is capped at 100: an
accurate join emits two filters per segment into one ffmpeg filter_complex.
SEC-14: the YouTube budget is instance-wide, so one user holding down a
manual sync spent the day for everyone. Per-user (not per-IP — the cost
belongs to the account) 3-per-10-minutes limiters on the two bulk pulls,
subscriptions and playlists, with separate budgets so one does not close the
other. The review also listed /rss, /backfill and /enrich; E3 deleted them,
and search stays unlimited on purpose — it is interactive, not a bulk pull.
Gate: pytest 896 -> 924 (none skipped), vitest 671.
The Download module's purpose is download -> share -> play in-browser, so the
output must play in EVERY browser (iOS/Safari/WebKit included). The only
universally-safe combo is mp4 + H.264 + AAC/MP3.
- formats.normalize() now CLAMPS every spec to that profile (container->mp4,
vcodec->None, audio_format opus->m4a) at the single point all paths flow
through (picker, stored profile, raw API) — not just by hiding UI options. A
source exposing no H.264 is still caught by the worker's browser-safe
re-encode, so playability is guaranteed end-to-end.
- build_ydl_opts drops the now-unreachable non-compat branches (+ _VCODEC_SORT).
- _SIG_VERSION 3->4 so assets cached under an old non-compat spec — or a stale
non-H.264 mp4 that slipped the v3 net (the HEVC Facebook dls) — re-derive.
- ProfileEditor drops the container/codec pickers and Opus; audio is M4A/MP3.
- i18n: remove the now-unused container/vcodec/any keys (HU+EN parity).
Each user stores their own login cookies (Netscape cookies.txt) for an
auth-walled download host (Facebook, Instagram, X, TikTok, Reddit) in
Settings; a download of an auth-walled link on that host is retried with
the acting user's cookie.
Two load-bearing security controls, both in downloads.credentials as the
single source of truth so enqueue and the worker can't drift:
- cache privacy: a cookie-authed download salts its MediaAsset format_sig
with the user id, so the authed asset is private and never cache-served
to another user. The worker attaches a cookie ONLY when the asset it is
downloading into IS that private, salted identity.
- host scope (SEC-12): a cookie is resolved only for a URL whose netloc
the credential owns (netloc-scoped _host_is); a look-alike/unrelated
host gets none.
cookies_enc is Fernet-encrypted at rest, only decrypted in-worker into a
0600 file under staging/.auth/ (survives the retry wipe + _produced_file
scan) and unlinked in finally. The blob is never returned by a route,
logged, audited, or written to a job's error/snapshot. cookiefile is set
after the adapter's extra merge so an adapter can't clobber it. Settings
UI is write-only (host + set/updated only, never echoed). New
download_credentials table + migration 0074; per-user routes; HU+EN i18n.
Tests: host-scope, cache-privacy (no cross-user serve), encrypt-at-rest,
write-only API, worker attach-gate; FE dom test for the write-only field.
Consolidates source-specific policy (youtube / facebook / reddit / generic) that was scattered
across worker.py, backfill.py, service.py, formats.py and storage.py with no shared source
identity. app/downloads/adapters.py holds the base (= generic yt-dlp behaviour) + per-source
overrides; resolve_adapter(source_kind, source_ref, info) picks one by source_kind, the yt-dlp
extractor_key, or the URL host, falling back to generic. yt-dlp stays the engine — the adapter is
policy only.
Moved into adapters (behaviour-equivalent):
- uploader_url derivation (YouTube channel_url / Facebook uploader_id / reddit None) — removes the
worker/backfill duplication (build_uploader_url + _should_refetch gone).
- the player-client fallback sets + retriable markers + YouTube extractor_args/POT (build_ydl_opts
now takes source-agnostic opts plus an `extra` dict from the adapter).
- source_url reconstruction (service.source_url delegates to the adapter).
Two intentional (approved) behaviour changes:
- the player-client fallback is now YouTube-only; non-YouTube sources make a single extraction
attempt instead of a pointless double attempt with youtube-only client args.
- the .nfo <uniqueid type=...> follows the source (adapter.nfo_uniqueid_type) instead of the
hardcoded "youtube" that mislabelled every url-source download.
Deliberately left generic (documented non-moves): title cleaning (normalize_title is harmless
across sources), the classify marker table, thumbnail_to_jpg, the format selectors, and og.py's
YouTube-hqdefault og:image preference (a self-contained thumbnail heuristic on the share path).
Verified end-to-end on localdev across all four adapters: downloads succeed and uploader_url + the
.nfo uniqueid type are correct per source.
- edit.py: extract _run_ffmpeg_best_effort (one run+timeout+swallow policy shared by
thumbnail_to_jpg / ensure_poster / ensure_storyboard) + a build_thumbnail_jpg_cmd
builder, matching the module's other ffmpeg commands.
- thumbnail_to_jpg: copy an already-JPEG thumbnail (Facebook, and Reddit's jpeg-under-
a-.png-name) instead of re-encoding it; only webp/png-proper are decoded via ffmpeg.
- errors.py: drop the redundant "account authentication" classify marker
("authentication is required" already covers the known Reddit message).
- formats.py: document that the opt-in EmbedThumbnail is unaffected by dropping the
convertor (it converts unsupported thumbs to PNG, not the crashing mjpeg2jpeg path).
- test_titles.py: guard the ReDoS regression with a thread + timeout (deterministic
"must not hang") instead of a wall-clock assertion.
Three prod-observed download bugs, root-caused from a frozen prod queue with the
worker pinned at 100% CPU:
- ReDoS in normalize_title: _TRAILING_HASHTAGS had two overlapping unbounded
quantifiers around the required letter, so a Facebook title with a long hashtag
cluster that is NOT at the end ("... #a #b #c | Page") backtracked catastrophically.
It runs inside the yt-dlp progress hook holding the GIL, so one such download froze
the whole worker (and could stall feed enrichment too - sync/videos.py calls it).
Rewrite with a zero-width "has a letter" lookahead + a possessive tag body: one
unambiguous split, nothing to backtrack. 40-tag stress case: ~0.1ms.
- Reddit download killed by a cosmetic thumbnail convert: yt-dlp's
FFmpegThumbnailsConvertor runs "-bsf:v mjpeg2jpeg" on a JPEG-served-under-a-.png-name
(Reddit) and fails; being a postprocessor, it failed the WHOLE download even though
the media was fine. Drop it and produce the <base>.jpg poster/og:image ourselves via
editmod.thumbnail_to_jpg (plain ffmpeg decode->mjpeg, best-effort -> ensure_poster
cuts a frame on failure). The FB Messenger / MS Teams share preview keeps working
(posters verified as real JPEGs).
- classify: map "authentication is required" (Reddit's auth wall) to login_required
instead of unknown, so the UI explains it rather than offering a pointless retry.
Tests: ReDoS-timing + numeric-marker regression, the Reddit classify case, and
thumbnail_to_jpg (real JPEG out / None on bad input, never raises).
- redownload now ALWAYS rebuilds into a fresh private asset instead of ever reusing a shared
cached file: the cache sig is salted with job_id + current asset_id, so the fork is distinct
from both the dedup pool and the job's own current asset. This resolves the co-held silent
no-op (finding #1) — a shared asset is left intact for its other holders while THIS job
re-fetches its own copy. Resolving the fork BEFORE releasing the old hold (and the unique
salted key) also removes the IntegrityError-rollback-after-file-delete window (finding #2).
- format_sig gains an optional `salt` for that fork identity.
- titles: don't consume the space after `|`, so a "stats | #hashtags" remainder keeps the
leading whitespace _TRAILING_HASHTAGS needs — and fall back to the prefix+hashtag-stripped
text, so neither the stats nor the SEO hashtags are resurrected when a title empties (#3).
- worker: early-fill asset.title falls back to the video id so a title that cleaned to empty
doesn't show a blank card while downloading (#5).
- Tests for the salt fork and the hashtag-remainder case.
(Finding #4 — quota on re-download — intentionally not changed: a re-download reuses the
existing job and re-fetches ~the same bytes, so calling check_enqueue would wrongly reject on
the job-count cap while footprint is unchanged.)
- redownload: never clobber a co-held (deduped) asset. Drop the force-reset-to-pending;
_release_asset already deletes+recreates a solo asset (genuine re-fetch), while a shared
ready asset is left intact and the re-queued job re-points to it via _finish_from_cache —
so one user's re-download can't delete another's file mid-serve (finding #1).
- redownload: reset queue_pos to the tail so a re-download doesn't front-run newer queued
jobs on the worker's `ORDER BY queue_pos` claim (finding #3). Made service.next_queue_pos public.
- formats: video-only mp4 selector prefers every video-only option before any progressive
`best`, so a "Video only" download stays audio-free whenever a video-only stream exists (#2).
- titles: a title that is only the engagement prefix no longer resurrects the stripped stats
(return the stripped text / empty, not the raw) (#4).
- worker: probe the file's duration when yt-dlp gave none, so a long re-encode shows real
progress instead of a frozen 0% (#5); tighten the ensure_browser_playable docstring to its
actual mp4-profile scope (#6).
Shared /watch links showed a "broken play button" on iPad (any iOS
browser — all forced onto WebKit) while playing fine on desktop Chrome.
Root cause: the stored mp4's video codec was AV1 (confirmed via ffprobe),
which WebKit can't decode. The existing H.264 guard was only a
format_sort *preference*, so a non-YouTube source (Facebook) that ships
AV1 as its best video-only stream slipped through.
- B1: for the mp4 compat profile, prefer H.264 at the SELECTION level
with a progressive fallback (bestvideo[vcodec^=avc1]+bestaudio /
best[vcodec^=avc1] / anything) so an avc1 progressive is chosen over
an AV1-only video-only stream.
- B2: re-encode the rare AV1/VP9-only result to H.264+AAC (+faststart)
in the worker before storing, gated on the compat profile; corrects
the asset codec metadata to match.
- Bump _SIG_VERSION 2->3 so cached AV1 assets re-derive.
- Default download preset is now 720p (migration 0058 re-seeds builtins
720p-first; ProfileEditor BLANK 1080->720).
- Tests for the selector, compat opt-outs, and the transcode predicate.
- B1 (sticky errored asset): get_or_create_asset now resets a reused status=='error'
asset back to 'pending' (+clears the error), so a fresh enqueue/edit of a once-failed
(source,format) pair actually re-downloads instead of the worker short-circuiting the
new job with the stale error. Errored assets carry no expires_at, so without this the
pair was permanently poisoned for all users until someone hit resume.
- B2 (ref_count leak): _release_asset counts 'error' as a holding state, so deleting an
errored job decrements the ref_count that enqueue always incremented (the worker never
decrements on failure). Errored rows are deliberately NOT deleted here — a concurrent
B1 reuse could otherwise be lost-updated + FK-nulled; the row is fileless and harmless.
- B3: admin storage dashboard reads sysconfig.get_int(db,'download_total_max_bytes')
(the admin-editable DB value GC enforces) instead of the raw env default.
- B4: the single-trim branch of normalize_edit_spec guards its float() coercion like the
crop/segments branches — a malformed trim now yields a 400, not an unhandled 500.
- B5: formats.normalize guards int(max_height) → falls back to "best" instead of 500.
Reviewed (race in an earlier B2 draft caught + fixed); localdev boots, B4/B5 unit-verified.
- C1: remove downloads/formats.py target_ext() — defined but never called (the
worker derives the real extension from the produced file's suffix).
- C2: the download-root containment+existence guard was copy-pasted 6× across the
file-serving endpoints (routes/downloads.py ×3, routes/public.py ×3). Extract
storage.safe_abs_path(root, rel) -> Path|None so this security-sensitive check
lives in one place; behavior identical (same containment test + messages). The
extraction also made `pathlib.Path` unused in both route modules (removed).
mp4 downloads used yt-dlp's default best video+audio, which on YouTube is
VP9+Opus at 1080p. Chromium plays that, but iOS/Safari WebKit (which every
iOS browser is forced to use) decodes only H.264/H.265+AAC inside mp4 — so a
shared /watch link showed a broken player on iPhone/iPad while the download
still worked. Rank vcodec:h264 + acodec:aac above resolution for mp4 output
(unless a custom profile pins a vcodec), keeping VP9/AV1 as a graceful
fallback. Bump the format signature (v2) so an identical spec gets a fresh
cache identity instead of hitting a stale VP9 asset.
YouTube increasingly demands a Proof-of-Origin token (or shows 'confirm you're not a bot').
Instead of manual cookies, run the bgutil POT provider as a sidecar that mints tokens on demand:
- compose: bgutil-pot service (brainicism/bgutil-ytdlp-pot-provider:1.3.1, port 4416, init)
- requirements: bgutil-ytdlp-pot-provider==1.3.1 plugin (version pinned to the image)
- config: DOWNLOAD_POT_BASE_URL (http://bgutil-pot:4416) + DOWNLOAD_PLAYER_CLIENTS
(web_safari,web,tv — POT-capable; the default android_vr client never requests a token)
- formats.build_ydl_opts wires extractor_args youtube:player_client + youtubepot-bgutilhttp:base_url
Verified: the sidecar mints a valid PO token (BotGuard challenge solved) and yt-dlp fetches it
from the provider. NOTE: end-to-end download couldn't be confirmed here because the test IP got
hard-flagged by YouTube from heavy testing (~16 GB + dozens of extractions) — a hard abuse block
needs cooldown/cookies, which POT doesn't lift; POT bypasses the normal soft bot-check.
Embedding (thumbnail/chapters) rewrote the whole file — a 10 GB video spent minutes making a
10 GB temp copy — while the Plex .nfo + poster sidecars already carry that metadata. So:
- builtin presets no longer embed (migration 0040 re-seeds them; formats._DEFAULTS embed off);
only the tiny FFmpegThumbnailsConvertor (for poster.jpg) remains, so downloads go
video -> audio -> merge -> done with no full-file rewrite
- default preset is now 1080p (Best stays available, second in the list) so a long video
doesn't silently pull ~10 GB and blow the quota
Users who want self-contained files can enable embedding in a custom profile.
Root cause of the failing downloads: containers usually have no working IPv6 route, but
googlevideo CDN hosts advertise AAAA records, so the downloader tried IPv6 and failed with
'[Errno -5] No address associated with hostname'. Small clips happened to use IPv4; long videos
(more CDN requests / the ffmpeg path) hit IPv6 and died.
- yt-dlp source_address=0.0.0.0 forces IPv4 for every connection (== --force-ipv4). Verified: the
full video+audio download completes cleanly.
- Also: retry (resume) now resets the shared asset from 'error' to 'pending', so it actually
re-downloads — previously the requeued job instantly re-inherited the asset's stale error
because the worker short-circuits a job whose asset already errored.
- Dropped the localdev DNS override (wrong hypothesis; the issue was IPv6, not the resolver).
- Kept yt-dlp retries/fragment_retries/socket_timeout for transient blips.
Verified end-to-end in the worker: two previously-failing long videos now download to done.
The progress bar looked broken (95% -> 5% -> recount) because yt-dlp downloads the video and
audio streams separately (each 0->100%) then merges — with no indication of which step is
running. Now:
- worker labels the phase from the stream codecs (video / audio) and via a postprocessor hook
(merging / processing), so the user sees what's happening
- DownloadCenter shows the phase as the status and renders an indeterminate pulse (no bogus %)
during merge/processing; phase i18n en/hu/de
- yt-dlp retries (3) + fragment_retries (5) so transient network blips self-heal instead of
failing the job (seen once as a DNS 'No address associated with hostname' error)
Verified: phase transitions queued -> video -> processing -> done.
The .gitignore 'downloads/' pattern for the DOWNLOAD_ROOT bind mount also matched the
backend/app/downloads source package, so formats.py/storage.py/service.py never got
committed with M2. Anchor the ignore to '/downloads/' (repo root only) and add the package.
storage.sanitize() now handles arbitrarily messy titles (emoji, ZWJ, fullwidth, clickbait
punctuation): NFKC-normalize, drop emoji/symbol/control unicode categories, collapse
repeated punctuation, underscore-join words -> space-free paths. Accents (HU/DE) preserved,
no ASCII folding. Plex layout uses _-_ separators + Season_{year}.
peter