From 0ab71eb899bee45c8436f4f71e73586c098c535e Mon Sep 17 00:00:00 2001
From: Marius Luca <marius@dreamer-ge.com>
Date: Fri, 7 Jan 2022 22:07:59 +0200
Subject: [PATCH] - limit font attachments requested for ass subtitles to a
 supported formats list

---
 src/plugins/htmlVideoPlayer/plugin.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/plugins/htmlVideoPlayer/plugin.js b/src/plugins/htmlVideoPlayer/plugin.js
index e4692e597..783a49e6b 100644
--- a/src/plugins/htmlVideoPlayer/plugin.js
+++ b/src/plugins/htmlVideoPlayer/plugin.js
@@ -1048,12 +1048,16 @@ function tryRemoveElement(elem) {
          * @private
          */
         renderSsaAss(videoElement, track, item) {
+            const supportedFonts = ['application/x-truetype-font', 'font/otf', 'font/ttf', 'font/woff', 'font/woff2'];
             const avaliableFonts = [];
             const attachments = this._currentPlayOptions.mediaSource.MediaAttachments || [];
             const apiClient = ServerConnections.getApiClient(item);
-            attachments.map(function (i) {
-                // embedded font url
-                return avaliableFonts.push(apiClient.getUrl(i.DeliveryUrl));
+            attachments.forEach(i => {
+                // we only require font files and ignore embedded media attachments like covers as there are cases where ffmpeg fails to extract those
+                if (supportedFonts.includes(i.MimeType)) {
+                    // embedded font url
+                    avaliableFonts.push(apiClient.getUrl(i.DeliveryUrl));
+                }
             });
             const fallbackFontList = apiClient.getUrl('/FallbackFont/Fonts', {
                 api_key: apiClient.accessToken()