Default caption on load

[hiren3897]

Have you read the Tutorials?
yes

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

What version of Shaka Player are you using?
v4.3.0

Please ask your question
I add 7 different external subtitles .vtt to the player using

await this.player.addTextTrackAsync(subtitlesTrack.url, subtitlesTrack.language, 'subtitles', subtitlesTrack.mimeType);

What I want is for when the player loads it should have a default subtitle activated.

I have to manually go and select the subtitle.

Is there any way to do that?

I already tried the configurations mentioned below.

preferredTextRole: 'en',
preferredTextLanguage: 'en'

[joeyparrish]

I believe that preferred* configs are applied to choose initial tracks, before you call addTextTrackAsync. So you will have to select it yourself. You can use the return value from addTextTrackAsync to call selectTextTrack, though, if I'm not mistaken.

[joeyparrish]

"On load", your additional tracks don't exist yet, so we can't use the preferences to choose them on load.

[hiren3897]

Okay, thanks for the guidelines,

After the player loads, I can try to selectTextTrack from getTextTracks? but it still doesn't work :(

Still the captions is set to off

Do Have to set track.active -> true?

As I remember I tried this but didn't work` If I'm not mistaken.

[joeyparrish]

You also need to call setTextTrackVisibility(true). Please don't change track.active. That is informational, and active tracks are changed by selectTextTrack() only.

[hiren3897]

Thanks @joeyparrish
the missing piece was setTextTrackVisibility(true)

It works.
🎉