diff --git a/lib/main.js b/lib/main.js
index 07c46d5..172b8b2 100755
--- a/lib/main.js
+++ b/lib/main.js
@@ -214,6 +214,12 @@ let startPreparationTask = () => {
      */
     let didShowQuestion = false
 
+    /**
+     * Question status
+     * @type {Boolean}
+     */
+    let startedPrimaryTask = false
+
     /**
      * Handles prepTask.stdout
      * @param {Buffer|String} data - FFmpeg Live Log Output Buffer
@@ -230,7 +236,10 @@ let startPreparationTask = () => {
             }
             // Send SIGKILL: preparation task succeeded
             prepTask.kill('SIGKILL')
-            startPrimaryTask(outputDuration, outputFilename)
+            if (!startedPrimaryTask) {
+                startedPrimaryTask = true
+                startPrimaryTask(outputDuration, outputFilename)
+            }
         }
     }