instaarchive-viewer/docs/gallery-dl.md

gallery-dl — a CLI replacement for JDownloader2

Status: design + verified config. scripts/gdl-sync.py is a skeleton; no profile has been migrated yet.

Everything below was measured against the live site and the real archive on 2026-08-16, not inferred from documentation.

Why gallery-dl and not a hand-rolled script

The hard parts of fetching Instagram are pagination, cookie handling, CDN URL expiry and resumption. gallery-dl already has all of them, plus extractors that map 1:1 onto our sidecar directory layout (posts, reels, stories, highlights). Rolling our own would mean reimplementing the ban-sensitive part by hand.

The account was suspended on 2026-08-17 — read this first

The account used for all of the below was suspended the same day this tooling was built, for "activity that doesn't follow our Community Standards on spam". The fetching was not the expensive part. Verification was.

What was actually spent against instagram.com in a few hours, from one session and one IP:

activity	rough requests	downloaded
enumerating a profile grid by scrolling it in an automated browser	~18 pages	nothing
the same profile again, after a bug in the scraping selector	~18 pages	nothing
a Reels tab enumerated the same way	~9 pages	nothing
full -j metadata dumps of one profile, twice	~16 pages	nothing
--simulate runs over the same profile, three times	~24 pages	nothing
single-post /p/<code>/ fetches while testing filename formats	~8	a handful
an aborted sync that re-ran every listing pass before dying	~40 pages	~270 MB
the real sync, 24 sources across 6 profiles	~150 pages	2.2 GB

The two rows that actually mattered to the archive are the last one and part of the second-to-last. Everything above them produced no files at all, and together they were a comparable number of requests.

The warnings arrived in this order and were each rationalised:

1. 429 Too Many Requests from scontent-*.cdninstagram.com, losing two videos. Treated as a pacing problem — pacing was lowered and the run continued.
2. 400 Bad Request from /api/v1/highlights/<id>/highlights_tray/, on an endpoint that had worked hours earlier. Correctly read as a possible block; requests stopped.
3. Suspension.

Treat the first CDN 429 as a stop signal for the session, not a tuning parameter. It is the tolerant surface complaining; if that surface is complaining, the rate-limited one has been unhappy for a while.

Rules that follow from this

• Count verification requests against the same budget as fetching. A --simulate, a -j dump and a browser scroll all hit instagram.com and download nothing. Being read-only does not make them free; it makes them invisible, which is worse.
• Never enumerate the live site with an automated browser. Scrolling a 214-post grid is ~18 paginated GraphQL loads at machine speed with no dwell time between them. It is the most obviously non-human thing in this whole document, and it was done here twice on one profile.
• Verify against the archive, not against Instagram. Every naming, dating and classification question answered in this file could have been answered from files already on disk plus a single listing pass.
• probe_live is not cached, so every restart re-enumerates everything. The aborted run cost a full duplicate set of listing passes for five profiles. Cache probe output to disk before running anything twice.
• Budget per session, not per command. Nothing in the tooling knows what the last command spent.

For a replacement account

• Let it exist and be used normally for a while before pointing any tool at it.
• Keep the cookie on one machine and one public IP, as before.
• Start with a single small profile and stop for the day afterwards.
• Prefer Instagram's own "Download a copy" export where possible: it is first-party, costs no scraping requests, and carries the metadata this whole document works around not having.

The safety model — read this before changing any option

The ban vector is requests to instagram.com, not bandwidth. See docs/jdownloader.md for the history; Instaloader got this account banned by asking instagram.com a question per post.

gallery-dl has two API backends and the difference is exactly that vector:

if self.config("api") == "graphql":
    self.api = InstagramGraphqlAPI(self)   # per-post api.media() for every
else:                                      # video and every carousel
    self.api = InstagramRestAPI(self)      # <- default, listing-only

The REST backend paginates at count: 30 (feed) / page_size: 50 (clips), and those responses already carry carousel_media, image_versions2, video_versions and product_type. No per-post request. A 300-post profile costs roughly 10 requests to instagram.com.

Rules, in order of importance:

1. "api": "rest" always. Never graphql. This is the whole ballgame.
2. Never enable metadata-style options that trigger extra calls. If a field is not already in the listing response, it is not worth a request.
3. Pace it. "sleep-request": [4.0, 7.0] — a randomised gap, not a fixed one. Also "sleep": [1.0, 3.0] between downloads.
4. Cap the download rate (downloader.http.rate) so the CDN side looks like a person, not a mirror.
5. Run from the same public IP as the browser the cookie came from. At time of writing that is mattellite (66.23.52.196); the dev workstation is a different public IP and using the cookie from there is precisely what session-hijack detection looks for.
6. No programmatic login, ever. gallery-dl's username/password path is disabled upstream anyway; use --cookies-from-browser.

Do not add proxy rotation, fingerprint spoofing or account rotation. Throttling and request-avoidance are welcome; evasion is not.

Cookies

The logged-in Chrome on mattellite runs with a non-default profile:

--user-data-dir=/home/matt/.config/google-chrome-devtools

so the cookie flag is:

--cookies-from-browser "chrome:/home/matt/.config/google-chrome-devtools"

Plain --cookies-from-browser chrome fails with "Unable to find chrome cookies database" because it looks in ~/.config/google-chrome/.

Anonymous access is not a viable fallback: it serves lower-resolution media, caps profile pagination at 12 posts, and returns AuthRequired for stories and highlights.

Output format

The viewer's parser is the contract, not JD2's exact bytes. EXPORT_RE in src/lib/archive-patterns.ts accepts all of these, and normalises the index with parseInt, so JD2 and gallery-dl naming interoperate:

"… - CrORBIcJJbM.mp4"      -> postId=CrORBIcJJbM  index=1
"… - CrORBIcJJbM - 1.mp4"  -> postId=CrORBIcJJbM  index=1
"… - C53YPQzp7Wj - 09.jpg" -> postId=C53YPQzp7Wj  index=9

That means zero-padding and the presence/absence of - N on single-media posts are cosmetic. Don't spend effort forcing them.

Directory layout

kind	directory	note
posts	<user>
reels	<user> - reels
stories	story - <user>
highlights	story highlights - <user> - <title>

Force the directory with -D; never use {username} for it. A profile's reels tab returns collab reels owned by other accounts — /0ct0ber19/reels/ served 6 reels owned by official_artms and 1 by chuuo3o. With {username} those would scatter into official_artms - reels/. JD2 got this right and the archive proves it: chuuo3o and official_artms filenames sit inside 0ct0ber19 - reels/.

So: owner in the filename, crawl scope in the directory.

Filenames

"filename": {
  "sidecar_shortcode and count >= 10":
      "{date:Olocal/%Y-%m-%d}_{username} - {post_shortcode} - {num:02}.{extension}",
  "sidecar_shortcode":
      "{date:Olocal/%Y-%m-%d}_{username} - {post_shortcode} - {num}.{extension}",
  "":
      "{date:Olocal/%Y-%m-%d}_{username} - {post_shortcode}.{extension}"
}

sidecar_shortcode is set only when the post is a carousel, so it is the carousel discriminator. Conditions are evaluated in order, first match wins (path.py:265).

Stories and highlights use the per-item {shortcode}, not {post_shortcode} (which is the reel's id, shared by every item in it):

"{date:Olocal/%Y-%m-%d}_{username} - {shortcode}.{extension}"

{date} on a story/highlight file is the per-item taken_at (instagram.py:337 prefers item["taken_at"]), verified on a 154-item highlight whose items carried distinct times while post_date stayed pinned to the reel. Highlights therefore gain real dates — today they fall back to directory mtime.

The timezone is not UTC

JD2 stamped filenames in desktop local time (US Eastern). Measured across 212 comparable posts:

model	mismatches
UTC	19
UTC−5 (EST)	10
UTC−4 (EDT)	0
America/New_York (DST-aware)	0

{date:Olocal/%Y-%m-%d} uses the machine's local zone with per-timestamp DST awareness, which reproduces it — mattellite is America/Toronto, the same offsets. Note the trailing / must be omitted: Olocal/%Y-%m-%d/ puts the separator into the strftime format and it sanitises to an underscore, giving 2026-08-15__0ct0ber19.

If the sync ever moves to a host in another timezone, set an explicit {date:O-4/…} or the dates will silently shift for ~9% of posts.

Caption sidecars

JD2 writes one .txt per post, named without the index, containing the caption with no trailing newline, and writes nothing when the caption is empty (measured: 197 of 217 posts, 86 of 86 reels, 0 of 10 stories, 0 of 16 highlights). gallery-dl reproduces this exactly with the default "empty": false:

{ "name": "metadata", "event": "post", "mode": "custom",
  "content-format": "{description}", "extension": "txt",
  "filename": "{date:Olocal/%Y-%m-%d}_{username} - {post_shortcode}.txt" }

"event": "post" is what makes it one file per post rather than per media file.

Metadata sidecar (new — JD2 had no equivalent)

{ "name": "metadata", "event": "post", "mode": "json",
  "filename": "{date:Olocal/%Y-%m-%d}_{username} - {post_shortcode}.json",
  "include": ["post_shortcode","post_id","type","date","post_date","username",
              "fullname","owner_id","description","count","likes","post_url",
              "sidecar_shortcode"] }

Use include, not fields — fields is for mode: custom and silently does nothing here, leaving audio_user blobs (including another user's profile picture URL) in the output.

The payoff is type, which is Instagram's own classification:

{ "post_shortcode": "DbdG9L9jU4m", "type": "post",  "count": 2 }   // feed video
{ "post_shortcode": "Db-lNCoib9m", "type": "reel",  "count": 1 }   // real reel

This is the product_type: "clips" signal, delivered free in the listing response. It is the authoritative answer to "is this a reel", and would let the viewer retire the lone-video heuristic in src/lib/post-tabs.ts — see "Scanner work" below.

type is only populated by listing extractors. Extracting a single /p/<shortcode>/ URL leaves it null. Sync always uses listing URLs, so this only matters when testing by hand.

Cadence, and the budget that enforces it

Monthly for everything, daily for stories only. Stories expire in 24h and cannot be backfilled, so they are the one surface where missing a day means losing the content permanently. Everything else can wait — the skip-archive means an infrequent full sync costs barely more than a frequent one, because it only fetches what is new.

# monthly, everything
gdl-sync.py --index <viewer-url> --staging ~/gdl/staging \
    --publish <user>@<nas>:<archives> --archive-db ~/gdl/artms.db \
    --urls-file artms_account_links.txt --execute

# daily, stories only -- one request per profile
gdl-sync.py ... --only stories --execute

A stories-only run is one source per profile and never seeds, because a story cannot be in the archive before it is fetched; probing would double the cost of the cheapest surface for no benefit. Six profiles is a handful of requests.

When scheduling it, randomise the minute and avoid the hour boundary. A job that fires at exactly 09:00 every day is a machine; one that fires somewhere in a window looks like someone opening the app.

The tool now refuses to repeat itself:

flag	default	what it prevents
--min-interval	20h	re-fetching a source touched recently — the aborted-restart case that re-enumerated five profiles
--probe-ttl	24h	paying for a listing pass twice within a run cycle
--max-sources	off	a runaway list touching more than intended
--force	off	(escape hatch: ignores both guards)

State lives beside the archive DB as <db>.state.json, recording per source when it was seeded and last fetched. Seeding is a one-time bootstrap: after the first successful sync the archive DB records everything gallery-dl has seen, so the source is never probed again. That is the single biggest saving here — a second full sync costs roughly half what the first did.

Incremental sync — why the fetch host needs no copy of the archive

gallery-dl can skip already-held media two ways, and the difference decides whether the fetcher needs the archive mounted:

• By file existence (default). Needs the destination to already contain the files, so it only works if the archive is mounted where gallery-dl writes.
• By skip-archive (--download-archive). A sqlite DB of ids. Needs nothing on disk.

We use the second, so the fetch host can write to local disk and rsync afterwards. That avoids writing tens of thousands of small files over CIFS, and keeps a mid-sync failure from leaving partial files on the live Resilio share.

The key is archive_prefix + archive_fmt, which for this extractor is the literal instagram plus the per-media numeric pk (instagram.py:25, job.py:713-719). Verified: a 3-image carousel produced

instagram3079387627521318672
instagram3079387627521429433
instagram3079387627529716672

and a second run skipped every media file, rewriting only the idempotent .txt/.json sidecars.

Seeding. media_id is not in our filenames, so the DB cannot be built from names alone — but one listing pass (the pass we make anyway) maps every live item to its media_id, and the archive's file listing says which we already hold. No extra Instagram requests, and no archive content — a listing is enough, which GET /api/archives/:name/files already serves.

Measured on 0ct0ber19: 2275 live media items, 2248 seeded from the existing listing, 27 left to download — precisely the media of the two posts added since the last crawl.

The one trap, which silently seeds almost nothing if you get it backwards:

surface	filed under	why
posts, reels	post_shortcode	carousel children each have their own shortcode, which never appears in a filename
stories, highlights	shortcode (per item)	post_shortcode is the containing reel's id, shared by every item

live_key() encodes this. Matching on the wrong field seeded 5 of 2275.

Publishing

The fetch host stages to local disk and rsyncs afterwards. rsync --ignore-existing is not an optimisation but the safety property: the archive deliberately outlives Instagram, so publishing must only ever add. No --delete, and nothing already present is overwritten — including sidecars, which are rewritten every run and would otherwise churn the synced share.

Publishing happens once at the end of a run, so a profile that fails midway never reaches the archive half-written.

Status

In use. withaseul has been fetched and published to the live archive — 322 files added (74 media, 241 .json, 7 .txt), nothing overwritten or deleted. Of the 74 new media files, zero duplicated media already held under a different name, which is the check that says JD2 and gallery-dl naming really do converge.

Published files land owned by the SSH user rather than rslsync. The viewer reads them fine (world-readable), but Resilio does not own what it syncs; worth a chown if that ever matters.

The profiles to fetch live in artms_account_links.txt at the archive root, passed with --urls-file.

Verified run

withaseul, all four surfaces, staged locally and published to a scratch directory before the live publish above:

==> withaseul / posts      seeded 915 of 984 live items
==> withaseul / reels      seeded  28 of  34 live items
==> withaseul / stories    no results   (none active)
==> withaseul / highlights no results

Output landed correctly, including the collab-reel case — withaseul - reels contains 53 files owned by withaseul, 10 by cher_ryppo, 3 by 0ct0ber19 and 2 by official_artms, all with the owner in the filename and the crawl scope as the directory.

The CDN rate-limits, and the first run tripped it

At rate: 3M with sleep: [1.0, 3.0], scontent-*.cdninstagram.com returned 429 Too Many Requests and two videos were lost (gallery-dl retried, then gave up with exit 4). This is the tolerant surface complaining, which is a clear signal the pacing was too aggressive.

Defaults are now:

option	value
--rate	1M
--sleep-request	6–10 s
--sleep	3–6 s
sleep-429	120 s
retries (extractor and downloader)	8

Re-running with those recovered both videos and produced 0 failures and 0 429s. Do not raise them for speed; an archive sync has no deadline.

yt-dlp is worth installing

Without it, gallery-dl logs Cannot import yt-dlp or youtube-dl and falls back to a progressive URL for DASH videos. The fallback mostly works but is what the 429s hit hardest. pipx install yt-dlp on the fetch host.

Known quirks

• count is not the emitted file count. For 135 of 214 posts it was exactly one higher than the number of files written. This makes the count >= 10 padding condition mis-pad a handful of 9-item posts (10 of 214 measured). Since the parser normalises the index, this is cosmetic — but it means a re-fetch over an existing JD2 tree writes - 01.jpg beside an existing - 1.jpg.
• Carousels get edited. Two posts had a different media count live than on disk. Padding width follows the count at download time, so a grown carousel produces mixed widths — the archive already contains one such post from JD2.
• Highlights already have two naming styles on disk, and every undated file has a dated twin. The scanner dedupes by index so they render once; it is wasted disk, not a display bug.

Scanner work (not done yet)

useArchiveScanner currently treats any .json in the tree as a possible manifest. Adding gallery-dl sidecars needs it to distinguish three things:

1. Instagram export manifests (posts_1.json) — existing path.
2. Instaloader .json.xz — existing path, GraphQL node shape.
3. gallery-dl .json — new, flat shape, identified by having post_shortcode + type at the top level.

Once (3) is read, source/isStory and the reel flag should come from type rather than from the directory and the lone-video heuristic.

Test cases

Real subjects, all present in the archive today. See scripts/gdl-sync.py --selftest for the harness.

#	case	shortcode	expected
1	single image	CwcXnQhOqFG	one .jpg, no index
2	single feed video	DbdG9L9jU4m	one .mp4, type: post
3	carousel, images only	Cq8LrxSJAJE	- 1 … - 3
4	carousel, image + video	CtohvHxLnWO	- 1.jpg … - 4.mp4, no .txt
5	carousel of exactly 9	Cv2Hb_brx_N	1-digit index
6	carousel of 10+	CzM8Uf6B6H_	2-digit index - 01 … - 10
7	reel shown on the posts grid	C8FHM6EJl15	in <user>, type: reel
8	reel on the reels tab	Db-lNCoib9m	in <user> - reels, type: reel
9	collab reel (other owner)	DYcZOb0h6Sv	dir 0ct0ber19 - reels, filename chuuo3o
10	story	live only	story - <user>, per-item shortcode + date
11	story highlight	C-IImhvpFuk	story highlights - <user> - <title>
12	highlight, unicode title	Drawheeing⠀	trailing U+2800 preserved in dirname
13	empty caption	CrdsY5CrSsO	media written, .txt absent
14	deleted post	C0TgI7sphfZ	on disk, absent live — must not be removed
15	edited carousel	C7zG7-jJMlq	18 on disk, 8 live — must not be removed
16	pinned posts	0ct0ber19	3 pinned, returned out of date order
17	profile avatar	0ct0ber19.jpg	base dir, undated

Cases 14–16 are reconciliation, not naming: a sync must never delete, since the archive deliberately outlives Instagram.

Not covered, decide before relying on them: the /reposts/ tab (0ct0ber19 has one) and /tagged/. Neither is fetched today.