diff --git a/app/src/main/java/com/frank/ffmpeg/listener/OnHandleListener.java b/app/src/main/java/com/frank/ffmpeg/listener/OnHandleListener.java
index 380553c..cc54ab5 100644
--- a/app/src/main/java/com/frank/ffmpeg/listener/OnHandleListener.java
+++ b/app/src/main/java/com/frank/ffmpeg/listener/OnHandleListener.java
@@ -6,5 +6,6 @@ package com.frank.ffmpeg.listener;
  */
 public interface OnHandleListener {
     void onBegin();
+    default void onProgress(int progress, int duration){}
     void onEnd(int resultCode, String resultMsg);
 }