diff --git a/lib/classes/video.js b/lib/classes/video.js
index 5ec4fb0..cd1e152 100644
--- a/lib/classes/video.js
+++ b/lib/classes/video.js
@@ -771,11 +771,12 @@ class Video {
                 });
             });
 
-            // Other streams (Attachments: fonts, pictures, etc.)
-            _.each(_self.streams.otherStreams, function(stream, i) {
-                _self.ffmpegCommand.outputOptions('-map', stream.input + ':' + stream.index);
-                _self.encoder.logger.debug('Other stream', stream.input + ':' + stream.index, 'mapped.');
-            });
+            // "Only audio, video, and subtitles are supported for matroska"
+            // // Other streams (Attachments: fonts, pictures, etc.)
+            // _.each(_self.streams.otherStreams, function (stream, i) {
+            //     _self.ffmpegCommand.outputOptions('-map', stream.input + ':' + stream.index);
+            //     _self.encoder.logger.debug('Other stream', stream.input + ':' + stream.index, 'mapped.');
+            // });
 
             resolve();
         });