serverAppConfigs/serverAppConfigs-docs/Dankserver/Media Relayout.md

---
type: reference
title: Media Relayout
description: "Census, plan and apply the movie library into Jellyfin format: the gates to read, and the rollback."
tags: [dankserver, media-server, jellyfin, plex, procedure]
timestamp: 2026-10-30T00:00:00Z
---

# Media Relayout

The movie library on [[Entropy Volume]] arrived as release folders —
`Some.Movie.2019.1080p.WiKiTaLx.x265-FOO/` with the video inside named after
the release. [[Jellyfin]] matches a movie by folder and file name, so the
release noise cost posters, extras and versions. These scripts turn that
library into Jellyfin's own shape — and move TV back out of it — and nothing
else in the repo touches a media file.

| Script | Touches media? | Output |
|---|---|---|
| `scripts/media-census.py` | reads headers only | `enum`, `probed`, `plex` TSVs |
| `scripts/media-plan.py` | no — TSVs in, TSVs out | the plan + the exception report |
| `scripts/media-apply.py` | **renames, never copies**; sweeps only what a run emptied | the moves, plus a journal |
| `scripts/media-tv.py` | no — TSV out | a plan that moves TV into the TV library |

The seam is `tests/media_relayout.bats`; the target contract is quoted from
[jellyfin.org/docs/general/server/media/movies](https://jellyfin.org/docs/general/server/media/movies)
in `media-plan.py`'s docstring.

## Procedure

Run the census on the machine that mounts the library. `probe` is the slow step
(a header read per container) and is `nice`d — it is safe beside a live service
because it never competes for the GPU and never writes inside the library.

```bash
C=scripts/media-census.py
$C enumerate --root /mnt/entropy/Movies --out /tmp/media-enum.tsv
$C probe     --enum /tmp/media-enum.tsv --out /tmp/media-probed.tsv --jobs 6
$C plex      --root /mnt/entropy/Movies --out /tmp/plex-movies.tsv
```

`plex` reads the Plex metadata cache (`--db` defaults to the path the
[[Plex]] container bind-mounts at `/var/lib/plexmediaserver`) with
`mode=ro&immutable=1`: a live server is never locked or written.

Then plan — this reads only the three TSVs, so it costs seconds and can run
anywhere, including a laptop:

```bash
scripts/media-plan.py --root /mnt/entropy/Movies \
    --enum /tmp/media-enum.tsv --probed /tmp/media-probed.tsv \
    --plex /tmp/plex-movies.tsv --out /tmp/jf-plan.tsv --exceptions /tmp/jf-exceptions.txt
```

**Read `/tmp/jf-exceptions.txt` before applying.** It is not a log: every line
is a file the plan could not name a film for, a pile that needs a README, or a
collision it refused. The printed gate lines are the go/no-go:
`problems`, `bad-names`, `occupied`, `double-claim`, `left-unmoved` must all be
0 and `unplanned=0` must appear in the report. Any non-zero number means a file
that would be filed wrong, and the plan is not run until it is understood.

```bash
scripts/media-apply.py apply    --plan /tmp/jf-plan.tsv --root /mnt/entropy/Movies   # dry, writes nothing
scripts/media-apply.py apply    --plan /tmp/jf-plan.tsv --root /mnt/entropy/Movies --apply
scripts/media-apply.py verify   --plan /tmp/jf-plan.tsv --journal /mnt/entropy/media-relayout.jsonl
scripts/media-apply.py sweep    --journal /mnt/entropy/media-relayout.jsonl --root /mnt/entropy/Movies   # dry
scripts/media-apply.py sweep    --journal /mnt/entropy/media-relayout.jsonl --root /mnt/entropy/Movies --apply
scripts/media-apply.py rollback --journal /mnt/entropy/media-relayout.jsonl --root /mnt/entropy/Movies --apply
```

An apply also leaves the release folders it emptied standing where they were —
hundreds of them at the library root — which is what `sweep` removes, dry-run
first, from the same journal.

After it lands, both servers need a scan or the change is invisible.

```bash
# Run this from the host shell through `podman exec`, never from a neighbour
# container: Plex's HTTPD closes without a single byte on any request that
# arrives from another container's netns (10.89.x.x reads as "empty reply", not
# as a 401). The token rides stdin, never argv, where any process on the host
# could read it out of /proc/<pid>/cmdline.
umask 077
podman exec plex sh -c "sed -n 's/.*PlexOnlineToken=\"\\([^\"]*\\)\".*/\\1/p' \
  '/config/Library/Application Support/Plex Media Server/Preferences.xml'" >/tmp/px.tok
podman exec -i plex sh -c 'read -r T
  for k in $(curl -s -H "X-Plex-Token: $T" -H "Accept: application/json" \
      http://127.0.0.1:32400/library/sections | grep -o "\"key\":\"[0-9]*\"" | cut -d\" -f4); do
    curl -s -o /dev/null -w "plex section $k: %{http_code}\n" -X POST \
      -H "X-Plex-Token: $T" "http://127.0.0.1:32400/library/sections/$k/refresh"
  done' </tmp/px.tok
```

[[Jellyfin]] has no credential on this box that can trigger a scan: the two keys
in its database are Seerr's, unused since 2026-09-01, and answer 401 to every
call. Mint one (*Dashboard → Advanced → API Keys*, Administrator) and store it in
`~/.config/secrets/jellyfin`, or press *Library → Scan All Libraries* in the web
UI. A scripted scan passes the key in a mode-600 curl config, never in a header
argument:

```bash
umask 077; printf 'header = "X-Emby-Token: %s"\n' "$(cat ~/.config/secrets/jellyfin)" >/tmp/jf.hdr
curl -s -K /tmp/jf.hdr -o /dev/null -w "jellyfin scan: %{http_code}\n" \
  -X POST http://127.0.0.1:8096/Library/Refresh
```

## TV in the movie library

A box set that arrives in the movie share stays there until someone moves it:
`media-plan.py` refuses to file TV and parks each series in
`_TV needs a TV library - <series>`. `scripts/media-tv.py` is the mover. It
walks the movie library itself (no census needed), groups episode-shaped names
by series, and writes a plan in the executor's own format:

```bash
scripts/media-tv.py --root /mnt/entropy/Movies --library /mnt/entropy/TVShows \
    --out /mnt/entropy/media-tv-plan.tsv
scripts/media-apply.py apply --plan /mnt/entropy/media-tv-plan.tsv --root /mnt/entropy
scripts/media-apply.py apply --plan /mnt/entropy/media-tv-plan.tsv --root /mnt/entropy \
    --journal /mnt/entropy/media-relayout-tv.jsonl --apply
scripts/media-apply.py sweep --journal /mnt/entropy/media-relayout-tv.jsonl \
    --root /mnt/entropy --apply
```

The shape it writes is the one both matchers read — `Monk (2002)/Season 05/
Monk - S05E03 - Mr. Monk and the Big Game.mkv` — keeping the file's own name,
because the publisher's spelling beats a re-derivation, with the year taken
from the box-set folder. What it refuses it prints and leaves alone:

- fewer than `--min` (5) files under one series name: one file named `Part 2`
  is a film, not a series;
- an episode whose name states no season number — no invented `Season 01`;
- a destination two files both claim: the executor refuses the whole plan
  before its first rename, and only Frank decides which copy is the keeper.
- an episode the destination library already holds at the same byte count. The
  movie share carried a second copy of the whole Monk box set — 124 episodes
  both sides, the same episode list, every byte count identical, 31.5 GiB each
  way, and head+tail blake2b identical on a 6-episode sample. The mover leaves
  such a series in place and says so; a duplicate is deleted or kept by Frank,
  never copied into one library by a tool.

A sidecar that shares an episode's own name (`.srt`, `.nfo`) moves with it.

## Laws

- **A moved file is a 404 in [[Plex]] until its section is rescanned.** The
  database keeps the release-folder path, so playback fails `Couldn't find the
  file to stream` while the scanner works through the section. Never read such a
  404 as a lost file: the file is where the journal says it is.
- **Plex's matched title outranks the filename**, and a Plex year of `0` means
  *indexed but never matched* — trusting it named folders `Title (0)`, which is
  a Jellyfin item with no year, no poster and no identity. A year that is not a
  plausible year is no information.
- **`<>:"/\|?*` never survive a name.** Plex's own title for *V/H/S/2* is
  `V/H/S/2`; kept verbatim it became `Movies/V/H/S/2 (2013)/` — a tree five
  levels deep that neither matcher reads as a movie.
- **A folder inside a movie's folder is bonus territory even when its name is
  misspelled.** `Saboteur (1942)/Exrtas/Saboteur - A Closer Look` is a typo for
  `Extras`; the vocabulary rule never fired, the featurette became a movie
  folder, and its words then out-scored the real film and drew that box set's
  other extras into it. The rule that replaced it needs no metadata: the folder
  holding the longest film owns the shorter video filed under it, unless that
  file's own name carries a different year — which is another film speaking.
- **Matching words are split on everything that is not a letter or a digit.**
  Splitting on separators but not on `/` left tokens like `(1960)/extras` that
  no other name could ever agree with, so a film could not be found by the
  folder holding it, and extras drifted into a neighbour. A bare number counts
  only when it could be a release year, so `1080` and `2160` never pose as
  agreement between two names.
- **Compare two media libraries with the series engine, never a path
  substring.** Filtering paths for `monk` also returns *Monkey Dust*, and
  letting whichever file a walk happens to reach first stand for an episode
  paired two libraries into a fake duplicate — the same sloppiness pointed the
  other way deletes a file that is unique. The comparison is `media-titles.ep_of`
  on both sides: series, season, episode, bytes, and a hash before anything is
  trashed.
- **A deletion is staged on the item's own filesystem.** The trash rule names
  `~/.AGENTTRASH`, but `/home` and `/mnt/entropy` are different devices: a 31 GiB
  stage there is a copy rather than a rename, it has to fit in the 187 GiB of
  free space, and `rename(2)` refuses it anyway. Trash goes beside the item —
  `/mnt/entropy/.AGENTTRASH/<date>-<topic>/` — so it costs one inode change and
  rolls back exactly like the move that made it.
- **A file whose name carries no words is bonus material, not a folder.**
  `.Extra 1 ( 1H 27min multisub ).mkv` parses to `1`; a movie folder named `1`
  is not a movie. It becomes a review line telling a human to name the file.
- **The executor renames and nothing else.** `rename(2)` cannot cross a
  filesystem, so a plan that would is refused rather than silently copying tens
  of terabytes.
- **The journal is a write-ahead log: the intent is fsynced before the rename.**
  An interrupted run therefore leaves only two states — an intent whose move
  happened, and an intent whose move never ran — and the next run finishes the
  job without moving anything twice. A file that moved with no journal line did
  not move through this tool, and the tool refuses to guess on its behalf.
- **The journal lives BESIDE the library root, never inside it** (default:
  `media-relayout.jsonl` next to the root): a log inside the library is a file
  Jellyfin indexes.
- **Refusals are all-or-nothing.** An occupied target, a vanished source or a
  duplicate destination stops the run *before the first rename*, so the operator
  fixes one thing and re-runs instead of untangling a half-applied plan.
  `--force` relaxes only the opinion guards; it never permits overwriting.
- **A sweep deletes only what the journal proves the run emptied.** A folder is
  eligible when a journalled file moved out of it or out of something under it,
  it now holds nothing but empty directories, no journalled destination lives
  beneath it, and it is not a folder the run created. A folder nobody moved —
  someone's placeholder — cannot be selected at all, and a symlink anywhere
  inside disqualifies the subtree, because the thing behind a link is not this
  tool's to delete. Every removal is journalled as `rmdir` and `rollback`
  recreates the folder, so the sweep is undone by the same command as the moves.
  Proof carries downward: inside a folder the journal proves emptied, every
  empty directory goes with it. A release's `Screens/` or `Sample/` is never a
  move source itself, so 146 of them held their emptied parents on disk after
  the first sweep.
  A failed `rmdir` is not a removal: only a folder that is really gone leaves
  scope, so the next sweep finishes what a permission problem stopped.
- **An episode-shaped name marks a SERIES, not a film — and the series is the
  name BEFORE the marker.** `Monk - S05E03 - Mr. Monk and the Big Game` is series
  `Monk`. Keyed on the whole title instead, every episode became a group of one
  and never reached the five-episode size that calls something a series, so a
  box set was filed as 124 movies in 124 folders. The threshold still earns its
  keep: a lone film named `Part 2` stays a film. Episodes of a series are parked
  in `_TV needs a TV library - <series>` for a human to move to a TV source —
  the movie tool never files TV.
- **One journal is one undo.** The TV move runs on its own journal, and with
  `--root` set to the share that holds BOTH libraries: the executor refuses any
  path outside `--root`, and a journal shared with the movie relayout would
  undo both runs when only one of them is wanted.

## Rollback

One command, from the journal of the run:
`media-apply.py rollback --journal …/media-relayout.jsonl --apply`. It recreates
any folder a sweep removed, restores every source path, removes only the folders
that run created *and that are now empty*, and refuses everything if any moved
file cannot be accounted for. A rolled-back journal refuses to roll back twice.

## See Also

[[Jellyfin]], [[Plex]], [[Entropy Volume]], [[Testing Policy]], [[Storage Policy]]

## Citations

- Jellyfin Movie documentation — folder/file naming, extras subfolders,
  `Movie (2013) - 216p.mkv` version and `- 4K.mkv` handling:
  <https://jellyfin.org/docs/general/server/media/movies>