diff --git a/common/src/main/java/ctbrec/recorder/postprocessing/Remux.java b/common/src/main/java/ctbrec/recorder/postprocessing/Remux.java
index 42ba5058..82a66b1b 100644
--- a/common/src/main/java/ctbrec/recorder/postprocessing/Remux.java
+++ b/common/src/main/java/ctbrec/recorder/postprocessing/Remux.java
@@ -77,9 +77,10 @@ public class Remux extends AbstractPostProcessor {
     }
 
     private String[] prepareCommandline(File inputFile, File remuxedFile) throws IOException {
-        String[] argsPreFfmpeg = getConfig().get(PRE_FFMPEG_ARGS).isEmpty() 
-                                ? new String[] {}  // If empty, create an empty array
-                                : getConfig().get(PRE_FFMPEG_ARGS).split(" ");
+        String preArgs = getConfig().getOrDefault(PRE_FFMPEG_ARGS, "");
+        String[] argsPreFfmpeg = preArgs.isEmpty() 
+            ? new String[] {}  // If empty, create an empty array
+            : getConfig().get(PRE_FFMPEG_ARGS).split(" ");
         String[] args = getConfig().get(FFMPEG_ARGS).split(" ");
         String[] argsPlusFile = new String[argsPreFfmpeg.length + args.length + 3];
         int i = 0;