[Feature] Video Timestamped Chapter Support

[sim2kid]

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request.

• Yes

The feature

When inside of Immich, I would like the ability to define chapters of a video by defining timestamps for them in the description. This would ideally follow the YouTube format.

Example:

0:00 - Intro
10:24 - Processional
35:45 - Ceremony
42:02 - Recessional

This would allow the video to be segmented inside of the UI so that, by checking the playback progress bar, the user may see when specific parts of the video are playing.

This is useful for long videos, such as concert or ceremony footage, so that sharing them can be a cleaner experience for other users.

In theory, we'd follow the YouTube rules specifically:
The first chapter always starts at 00:00 regardless of the first timestamp used. The rest are the starting points of all other timestamps.
The format is explicitly, [NewLine(or start)][Valid Time Stamp] - [Name] (Note the space-dash-space).
You can add chapters by checking for this format. A new line is required to separate the items.

This should only be an interface change, as the data itself is saved in the description, so no new data storage would be needed.

Platform

• Server
• Web
• Mobile

[sim2kid]

Note, this would also work well with #28487 which adds timestamp text linking to make the description clickable.

[bo0tzz]

#28388