Only load subtitle when direct play/remux

src/plugins/htmlVideoPlayer/plugin.js

@@ -1,6 +1,7 @@
 import DOMPurify from 'dompurify';
 
 import browser from '../../scripts/browser';
+import appSettings from '../../scripts/settings/appSettings';
 import { appHost } from '../../components/apphost';
 import loading from '../../components/loading/loading';
 import dom from '../../scripts/dom';
@@ -1566,15 +1567,50 @@ export class HtmlVideoPlayer {
             return t.Index === streamIndex;
         })[0];
 
-        this.setTrackForDisplay(this.#mediaElement, track, targetTextTrackIndex);
-        if (enableNativeTrackSupport(this._currentPlayOptions?.mediaSource, track)) {
-            if (streamIndex !== -1) {
-                this.setCueAppearance();
-            }
+        // This play method can only check if it is real direct play, and will mark Remux as Transcode as well
+        const isDirectPlay = this._currentPlayOptions.playMethod === "DirectPlay";
+        const burnInWhenTranscoding = appSettings.alwaysBurnInSubtitleWhenTranscoding();
+
+        if (!isDirectPlay && burnInWhenTranscoding) {
+            const apiClient = ServerConnections.getApiClient(this._currentPlayOptions.item.ServerId);
+            const sessionPromise = apiClient.getSessions({
+                deviceId: apiClient.deviceId()
+            }).then(function (sessions) {
+                return sessions[0] || {};;
+            }, function () {
+                return Promise.resolve({});
+            });
+
+            const player = this;
+
+            sessionPromise.then((s) => {
+                if (!s.TranscodingInfo || s.TranscodingInfo?.IsVideoDirect) {
+                    player.setTrackForDisplay(player.#mediaElement, track, targetTextTrackIndex);
+                    if (enableNativeTrackSupport(player._currentPlayOptions?.mediaSource, track)) {
+                        if (streamIndex !== -1) {
+                            player.setCueAppearance();
+                        }
+                    } else {
+                        // null these out to disable the player's native display (handled below)
+                        streamIndex = -1;
+                        track = null;
+                    }
+                } else {
+                    // unset stream when switching to transcode
+                    player.setTrackForDisplay(player.#mediaElement, null, -1);
+                }
+            })
         } else {
-            // null these out to disable the player's native display (handled below)
-            streamIndex = -1;
-            track = null;
+            this.setTrackForDisplay(this.#mediaElement, track, targetTextTrackIndex);
+            if (enableNativeTrackSupport(this._currentPlayOptions?.mediaSource, track)) {
+                if (streamIndex !== -1) {
+                    this.setCueAppearance();
+                }
+            } else {
+                // null these out to disable the player's native display (handled below)
+                streamIndex = -1;
+                track = null;
+            }
         }
     }