Chapter Images
Not to be confused with chapters, which are the ticks you see in the timeline when watching a video. Chapter Images must be enabled to be displayed; chapters can be displayed even when Chapter Images are disabled.
Chapter images are a type of metadata for video media files stored in Jellyfin. They are images that correspond to chapters and give a preview of the video at that timestamp.
Jellyfin stores the chapter images within the metadata directory, which should be located inside your server's config directory.
Getting Started
The feature is enabled per library. There are 2 ways to get to the library settings
- When you add a new library, pick a video Content type, then navigate to "Chapter Images"
- Click the 3 dots of an existing library and then navigate to "Chapter Images"
Enable chapter image extraction
This will enable the Chapter image feature.
Extract chapter images during the library scan
This will change the scheduled extraction to happen in the "Scan Media Library" task instead of the "Extract Chapter Images" task.
Extracting chapter images can be computationally intensive and slow down library scans significantly - especially on large libraries.
Other Settings
In the dashboard, you can configure other behaviours of the chapter image feature. These settings are found in Libraries -> Metadata
Interval
This creates dummy chapters at a given interval (0 will disable dummy chapters) if no chapters are detected in the media file. The value is in seconds.
Not recommended to use small values here. Small intervals could slow down video playback as Jellyfin's webUI video player will try to render all the chapters on the timeline.
Resolution
This will set the resolution of the image files that are extracted. These images are used in a small preview window and will never take up the full screen, so setting a high resolution here is not necessary.