chromecast - Chromecast VTT not showing

Question

I am creating a Chromecast app that streams video and uses out of stream VTT captions. I have successfully managed to load TTML but I require to load VTT also for this I have the following code

this.player.enableCaptions(true, 'vtt', 'http://some_file.vtt');

this fails within the MediaPlayer.js with tyhe following error

Uncaught TypeError: Cannot read property 'parse' of null

This looks to be in the code to load the individual cues has anyone come across this problem?

Answer 1

this.player.enableCaptions(true, 'vtt', 'http://some_file.vtt');

应该

this.player.enableCaptions(true, 'webvtt', 'http://some_file.vtt');

Answer 2

您需要将（文本/音频）轨道信息添加到您的 MediaInfo，然后设置活动轨道。看看这个指南。另请注意，即使您的媒体是 mp4，拥有曲目也需要 CORS。