User-defined scrobble transformers not working - not sure why #476
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I've checked the FAQ and the documentation regarding user stage scrobble transformers. I had playTransform rules from before the scrobble enhancements overhaul in v0.10.5 and tried to adapt them for the new scrobble transform pipeline. I have Multi-Scrobbler set up with Spotify as a source and Maloja as a client. Inside config.json: "transformers": [
{
"type": "user",
"name": "FixTitleRegex",
"defaults": {
"title": [
"/\\s*[-—]\\s*(?:\\d{4}\\s+)?(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|\\btrack\\b|edition)(?:\\s+\\d{4})?(?:\\s+(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|track|edition)(?:\\s+\\d{4})?)*$/img",
"/\\(*\\[*(?:\\d{4}\\s+)?(?:\\(special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|\\btrack\\b|edition)(?:\\s+\\d{4})?(?:\\s+(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|track|edition)(?:\\s+\\d{4}?)?)*\\)*\\]*$/img"
],
"album": [
"/\\s*[-—]\\s*(?:\\d{4}\\s+)?(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|\\btrack\\b|edition)(?:\\s+\\d{4})?(?:\\s+(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|track|edition)(?:\\s+\\d{4})?)*$/img",
"/\\[*\\(*(?:\\d{4}\\s+)?(?:\\(special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|\\btrack\\b|edition)(?:\\s+\\d{4})?(?:\\s+(?:special|deluxe|remaster(?:s)?(?:ed)?|expanded|extended|bonus|track|edition)(?:\\s+\\d{4}?)?)*\\)*\\]*$/img"
]
}
},
{
"type": "user",
"name": "FixGroupArtists",
"defaults": {
"artists": [
"KPop Demon Hunters Cast",
"hololive English -Myth-",
"hololive English -Council-",
"hololive English -Advent-",
"hololive English -Justice-"
]
}
},
{
"type": "user",
"name": "FixAlbumTitles",
"defaults": {
"album": [
{
"search": "The way of all flesh",
"replace": "The Way of All Flesh",
"when": [
{ "artist": "Gojira" }
]
},
{
"search": "(Full Dynamic Range Edition)",
"replace": "",
"when": [
{ "artist": "Carcass" }
]
},
{
"search": "(Complete Edition)",
"replace": "",
"when": [
{ "artist": "Carcass" }
]
},
{
"search": "(Ultimate Edition)",
"replace": "",
"when": [
{ "artist": "Carcass" }
]
},
{
"search": "(Expanded Edition - Remastered)",
"replace": "",
"when": [
{ "artist": "Megadeth" }
]
},
{
"search": "(2004 Remix / Expanded Edition)",
"replace": "",
"when": [
{ "artist": "Megadeth" }
]
},
{
"search": "(30th Anniversary / Deluxe Edition)",
"replace": "",
"when": [
{ "artist": "Bryan Adams" }
]
},
{
"search": "(40th Anniversary Expanded Edition)",
"replace": "",
"when": [
{ "artist": "Ozzy Osbourne" }
]
},
{
"search": "(Remastered Deluxe Box Set)",
"replace": "",
"when": [
{ "artist": "Metallica" }
]
},
{
"search": "(Anniversary Edition - Remastered)",
"replace": "",
"when": [
{ "artist": "Rammstein" }
]
},
{
"search": "(XXV Anniversary Edition — Remastered)",
"replace": "",
"when": [
{ "artist": "Rammstein" }
]
}
]
}
}
]spotify.json looks like this: [
{
"name": "redacted",
"enable": true,
"clients": [],
"data": {
"clientId": "clientId",
"clientSecret": "clientSecret",
"redirectUri": "https://scrobble.example.com/callback"
},
"options": {
"scrobbleBacklog": false,
"playTransform": {
"preCompare": [
{
"type": "user",
"name": "FixTitleRegex"
},
{
"type": "user",
"name": "FixGroupArtists"
},
{
"type": "user",
"name": "FixAlbumTitles"
}
],
"log": "all"
}
}
}
]maloja.json: [
{
"name": "Maloja",
"enable": true,
"configureAs": "client",
"data": {
"apiKey": "apiKey",
"url": "http://local-ip-redacted.local:42010"
},
"options": {
"maxRequestRetries": 16383,
"retryMultiplier": 2
}
}
]What ends up happening is that when I try to play specific tracks e.g. Some Artist - Example Song (Remastered 2025), the transform rules that I set up don't work, and Maloja accepts a new scrobble "as is." In other words, Maloja scrobbles "Some Artist - Example Song (Remastered 2025)" instead of just "Some Artist - Example Song" Debug output: Debug output from scrobbled track: {
"input": {
"device": {
"id": "{redacted}",
"is_active": true,
"is_private_session": false,
"is_restricted": false,
"name": "{redacted}",
"supports_volume": false,
"type": "Tablet",
"volume_percent": 100
},
"shuffle_state": false,
"smart_shuffle": false,
"repeat_state": "off",
"is_playing": true,
"timestamp": 1772508186854,
"context": {
"external_urls": {
"spotify": "https://open.spotify.com/album/0qaLL09EtF1hiUis7PRvaJ"
},
"href": "https://api.spotify.com/v1/albums/0qaLL09EtF1hiUis7PRvaJ",
"type": "album",
"uri": "spotify:album:0qaLL09EtF1hiUis7PRvaJ"
},
"progress_ms": 10311,
"item": {
"album": {
"album_type": "album",
"artists": [
{
"external_urls": {
"spotify": "https://open.spotify.com/artist/1Yox196W7bzVNZI7RBaPnf"
},
"href": "https://api.spotify.com/v1/artists/1Yox196W7bzVNZI7RBaPnf",
"id": "1Yox196W7bzVNZI7RBaPnf",
"name": "Megadeth",
"type": "artist",
"uri": "spotify:artist:1Yox196W7bzVNZI7RBaPnf"
}
],
"external_urls": {
"spotify": "https://open.spotify.com/album/0qaLL09EtF1hiUis7PRvaJ"
},
"href": "https://api.spotify.com/v1/albums/0qaLL09EtF1hiUis7PRvaJ",
"id": "0qaLL09EtF1hiUis7PRvaJ",
"images": [
{
"height": 640,
"url": "https://i.scdn.co/image/ab67616d0000b273be9fa5a89479b6af481938a0",
"width": 640
},
{
"height": 300,
"url": "https://i.scdn.co/image/ab67616d00001e02be9fa5a89479b6af481938a0",
"width": 300
},
{
"height": 64,
"url": "https://i.scdn.co/image/ab67616d00004851be9fa5a89479b6af481938a0",
"width": 64
}
],
"name": "Rust In Peace (2004 Remix / Expanded Edition)",
"release_date": "1990-10-04",
"release_date_precision": "day",
"total_tracks": 13,
"type": "album",
"uri": "spotify:album:0qaLL09EtF1hiUis7PRvaJ"
},
"artists": [
{
"external_urls": {
"spotify": "https://open.spotify.com/artist/1Yox196W7bzVNZI7RBaPnf"
},
"href": "https://api.spotify.com/v1/artists/1Yox196W7bzVNZI7RBaPnf",
"id": "1Yox196W7bzVNZI7RBaPnf",
"name": "Megadeth",
"type": "artist",
"uri": "spotify:artist:1Yox196W7bzVNZI7RBaPnf"
}
],
"disc_number": 1,
"duration_ms": 311200,
"explicit": false,
"external_ids": {
"isrc": "USCA20400648"
},
"external_urls": {
"spotify": "https://open.spotify.com/track/6b6uLZsoGhObYexIxnRbIb"
},
"href": "https://api.spotify.com/v1/tracks/6b6uLZsoGhObYexIxnRbIb",
"id": "6b6uLZsoGhObYexIxnRbIb",
"is_local": false,
"name": "Hangar 18 - 2004 Remix",
"popularity": 61,
"preview_url": null,
"track_number": 2,
"type": "track",
"uri": "spotify:track:6b6uLZsoGhObYexIxnRbIb"
},
"currently_playing_type": "track",
"actions": {
"disallows": {
"resuming": true
}
}
},
"original": {
"data": {
"artists": [
"Megadeth"
],
"albumArtists": [],
"album": "Rust In Peace (2004 Remix / Expanded Edition)",
"track": "Hangar 18 - 2004 Remix",
"duration": 311.2,
"playDate": "2026-03-03T03:23:06.854Z",
"isrc": "USCA20400648",
"meta": {
"spotify": {
"track": "6b6uLZsoGhObYexIxnRbIb",
"artist": [
"1Yox196W7bzVNZI7RBaPnf"
],
"albumArtist": [],
"album": "0qaLL09EtF1hiUis7PRvaJ"
},
"brainz": {
"trackNumber": 2
}
}
},
"meta": {
"deviceId": "51503f58c7-iPad",
"source": "Spotify",
"musicService": "Spotify",
"trackId": "6b6uLZsoGhObYexIxnRbIb",
"trackProgressPosition": 10.311,
"scrobbleTsSOC": 1,
"newFromSource": true,
"url": {
"web": "https://open.spotify.com/track/6b6uLZsoGhObYexIxnRbIb"
},
"art": {
"album": "https://i.scdn.co/image/ab67616d00001e02be9fa5a89479b6af481938a0"
}
}
},
"steps": [
{
"name": "preCompare",
"source": "Spotify - source name redacted"
}
],
"scrobble": {
"payload": {
"title": "Hangar 18 - 2004 Remix",
"artists": [
"Megadeth"
],
"album": "Rust In Peace (2004 Remix / Expanded Edition)",
"key": "jCGimb2wbINxXHcqXfy0R4gbowxPxX5uZiRbholDGiAbtwb1yg5pAw14H44MC5rM",
"time": 1772508497,
"length": 311.2,
"duration": 300.889
},
"response": {
"status": "success",
"track": {
"artists": [
"Megadeth"
],
"title": "Hangar 18 - 2004 Remix"
},
"desc": "Scrobbled Hangar 18 - 2004 Remix by Megadeth"
},
"mergedScrobble": {
"data": {
"artists": [
"Megadeth"
],
"track": "Hangar 18 - 2004 Remix",
"album": "Rust In Peace (2004 Remix / Expanded Edition)",
"duration": 311.2,
"playDate": "2026-03-03T03:28:17.000Z"
},
"meta": {
"source": "Maloja",
"url": {
"web": "http://local-ip-redacted.local:42010/track?artist=Megadeth&title=Hangar+18+-+2004+Remix"
},
"lifecycle": {
"input": {
"time": 1772508497,
"track": {
"artists": [
"Megadeth"
],
"title": "Hangar 18 - 2004 Remix",
"length": 311.2,
"album": {
"name": "Rust In Peace (2004 Remix / Expanded Edition)",
"artists": []
}
}
},
"original": {
"data": {
"artists": [
"Megadeth"
],
"track": "Hangar 18 - 2004 Remix",
"album": "Rust In Peace (2004 Remix / Expanded Edition)",
"duration": 311.2,
"playDate": "2026-03-03T03:28:17.000Z"
},
"meta": {
"source": "Maloja",
"url": {
"web": "http://local-ip-redacted.local:42010/track?artist=Megadeth&title=Hangar+18+-+2004+Remix"
}
}
},
"steps": []
}
}
}
}
}I'm not sure what I'm doing wrong, if anything. I've tried various things, including having the transform pipeline in both the source and client JSON files, moving the playTransform rules into the source JSON file ( |
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Answered by
FoxxMD
Mar 4, 2026
Replies: 1 comment 4 replies
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Thanks for the detailed logs and debug data! I'll see if I can reproduce this. |
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4 replies
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@ultramameshiba please try docker image |
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Yeah looks like it's working. Transform diffs on the debug log show it is making changes (yes, the regex I'm using does a bad job with various edge cases, it is not a bug) |
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I think I spoke too soon when I said it was solved. After a bit of playing around with multiple other tracks and albums, I found the issue of "some user-defined transforms not working" still shows up. It looks like the order that scrobble transforms are executed in the pipeline is determined by the order the transforms show up in Example debug output when It looks to me like Multi-Scrobbler finds the first user-defined scrobble transformer in config.json, runs that, and then doesn't do anything else. Expected behavior would be for Multi-Scrobbler to follow the order of transformers as they are declared in edit: Yes, it probably sounds weird for someone to have more than one user-defined scrobble transformer in a source but it makes the config file easier to read |
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I think I see what you're saying. Can you make a new issue for this instead of a discussion? Also, please include Play Debug Data for the Plays detailed in the posted logs. |
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Answer selected by
ultramameshiba
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I think I see what you're saying. Can you make a new issue for this instead of a discussion? Also, please include Play Debug Data for the Plays detailed in the posted logs.