Add subtitle files during playing

[Bidp]

Hi, I was wondering if it's possible in ExoPlayer to add a subtitle file during playing without interfering the play. For what I know is we have to inject the corresponding SampleSource to TextTrackRender's constructor, but sometimes users just store their subtitle files anywhere, and they'd like to add the file after the media starts to play.

[Hitexroid]

this is my question too !!!

[sonvp]

Me too.

[ojw28]

This is not currently supported (you'd have to prepare the player again, which would cause re-buffering before the playback resumed). Marking as an enhancement for the future.

[xiaoxixi615]

Adding subtitles after player being prepared is really a common need, hope you will enhance this in the near future.

[MBakhshi96]

Preparing the player again, has also a side effect when using PlaybackStatsListener. This causes the onSessionFinished callback to be called twice even though the playback has not finished, leading to erroneous analytics data.