How to use a track thumbnail (sprite.vtt)

[wearrrrr]

Have you read the Tutorials?
Yes I have

Have you read the FAQ and checked for duplicate open issues?
Yes

What version of Shaka Player are you using?
Latest (4.3.0)

Please ask your question
I am wondering how I would go about using a caption file that I have (sprite.vtt) in order to display an image on the timeline as the user scrubs it, I have tried running addThumbnailsTrack(URL), which returns a fulfilled promise, then running player.getImageTracks() returns the correct information about said track, with active: false being set, manually setting it to true did nothing, and player.getThumbnails(0, 0) (presumably the correct statement but honestly I have no idea) returns Promise {<fulfilled>: null}

So I am not 100% sure where to go from here, because the track seems to load but not display. I am calling sprite.vtt from a remote url but im not quite sure why that would be an issue, because it uses a relative path of

00:00:00.000 --> 00:00:10.000
sprite-0.jpg#xywh=0,0,178,100

[avelad]

The thumbanils are not yet supported in the UI, see #3371

The method getThumbnails returns the raw info in a determined time, but it's responsibility of the developer transforms the data and put in the DOM to saw the thumbnails.

This answer your question?

[github-actions]

Closing due to inactivity. If this is still an issue for you or if you have further questions, the OP can ask shaka-bot to reopen it by including @shaka-bot reopen in a comment.