File Renaming

AB currently provides three renaming methods: pn, advance, and none.

pn

Short for pure name. This method uses the torrent download name for renaming.

Example:

[Lilith-Raws] 86 - Eighty Six - 01 [Baha][WEB-DL][1080p][AVC AAC][CHT][MKV].mkv
>>
86 - Eighty Six S01E01.mkv

advance

Advanced renaming. This method uses the parent folder name for renaming.

/downloads/Bangumi/86 - Eighty Six(2023)/Season 1/[Lilith-Raws] 86 - Eighty Six - 01 [Baha][WEB-DL][1080p][AVC AAC][CHT][MKV].mkv
>>
86 - Eighty Six(2023) S01E01.mkv

none

No renaming. Files are left as-is.

Collection Renaming

AB supports renaming collections. Collection renaming requires:

• Episodes are in the collection's first-level directory
• Episode numbers can be parsed from file names

AB can also rename subtitle files in the first-level directory.

After renaming, episodes and directories are placed in the Season folder.

Renamed collections are moved and categorized under BangumiCollection.

Episode Offset

Since v3.2, AB supports episode offset for renaming. This is useful when:

• RSS shows different episode numbers than expected (e.g., S2E01 should be S1E29)
• Anime has "virtual seasons" due to broadcast gaps

When an offset is configured for a bangumi, AB automatically applies it during renaming:

Original: S02E01.mkv
With offset (season: -1, episode: +28): S01E29.mkv

To configure offset:

1. Click on the anime poster
2. Open Advanced Settings
3. Set Season Offset and/or Episode Offset values
4. Or use "Auto Detect" to let AB suggest the correct offset

See Bangumi Management for more details on auto-detection.