diff --git a/AUTHORS b/AUTHORS
index df40777dd5..e878c89a0b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -51,3 +51,4 @@ Tomas Tichy <mr.tichyt@gmail.com>
 Toshihiro Suzuki <t.suzuki326@gmail.com>
 uStudio Inc. <*@ustudio.com>
 Verizon Digital Media Services <*@verizondigitalmedia.com>
+Adrián Gómez Llorente <adgllorente@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 6a33e3d9c0..2fb5a99ad8 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -84,3 +84,4 @@ Toshihiro Suzuki <t.suzuki326@gmail.com>
 Vasanth Polipelli <vasanthap@google.com>
 Vignesh Venkatasubramanian <vigneshv@google.com>
 Yohann Connell <robinconnell@google.com>
+Adrián Gómez Llorente <adgllorente@gmail.com>
diff --git a/lib/text/ttml_text_parser.js b/lib/text/ttml_text_parser.js
index 35e2e5e646..e98e9543c1 100644
--- a/lib/text/ttml_text_parser.js
+++ b/lib/text/ttml_text_parser.js
@@ -461,7 +461,7 @@ shaka.text.TtmlTextParser = class {
     if (imageElement) {
       const backgroundImageType = imageElement.getAttribute('imagetype');
       const backgroundImageEncoding = imageElement.getAttribute('encoding');
-      const backgroundImageData = imageElement.textContent;
+      const backgroundImageData = imageElement.textContent.trim();
       if (backgroundImageType == 'PNG' &&
           backgroundImageEncoding == 'Base64' &&
           backgroundImageData) {