fix(chromecast): empty track

packages/docs/public/ohls.html

@@ -213,7 +213,7 @@
     <script src="https://cdn.jsdelivr.net/npm/@oplayer/[email protected]/dist/index.min.js"></script>
 
     <script src="https://cdn.jsdelivr.net/npm/@oplayer/[email protected]/dist/airplay.min.js"></script>
-    <script src="https://cdn.jsdelivr.net/npm/@oplayer/[email protected].4/dist/chromecast.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/@oplayer/[email protected].5/dist/chromecast.min.js"></script>
 
     <script>
       var playlistScriptCdn = 'https://cdn.jsdelivr.net/npm/@oplayer/plugins@latest/dist/playlist.min.js'

packages/plugins/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@oplayer/plugins",
-  "version": "1.0.12-beta.4",
+  "version": "1.0.12-beta.5",
   "author": "shiyiya",
   "description": "oplayer's plugin",
   "homepage": "https://github.com/shiyiya/oplayer",

packages/plugins/src/chromecast.ts

@@ -93,18 +93,20 @@ class ChromeCast implements PlayerPlugin {
     if (source.poster) metadata.images = [{ url: source.poster, height: null, width: null }]
     mediaInfo.metadata = metadata
 
-    const subtitles = this.player.context.ui?.config.subtitle?.source as any[]
-    mediaInfo.tracks = subtitles.map((sub, id) => {
-      const track = new chrome.cast.media.Track(id, chrome.cast.media.TrackType.TEXT)
-
-      track.name = sub.name
-      track.trackContentId = sub.src
-      track.trackContentType = sub.type || 'text/vtt' //TODO: url match
-      track.language = sub.language || sub.name
-      track.subtype = chrome.cast.media.TextTrackType.CAPTIONS
-
-      return track
-    })
+    const subtitles = this.player.context.ui?.config.subtitle?.source as any[] | undefined
+    if (subtitles) {
+      mediaInfo.tracks = subtitles.map((sub, id) => {
+        const track = new chrome.cast.media.Track(id, chrome.cast.media.TrackType.TEXT)
+
+        track.name = sub.name
+        track.trackContentId = sub.src
+        track.trackContentType = sub.type || 'text/vtt' //TODO: url match
+        track.language = sub.language || sub.name
+        track.subtype = chrome.cast.media.TextTrackType.CAPTIONS
+
+        return track
+      })
+    }
 
     const request = new chrome.cast.media.LoadRequest(mediaInfo)