diff --git a/app/src/main/java/com/github/xch168/ffmpeg/invoker/demo/FFmpegTestActivity.java b/app/src/main/java/com/github/xch168/ffmpeg/invoker/demo/FFmpegTestActivity.java
index e74b1b2..9293019 100644
--- a/app/src/main/java/com/github/xch168/ffmpeg/invoker/demo/FFmpegTestActivity.java
+++ b/app/src/main/java/com/github/xch168/ffmpeg/invoker/demo/FFmpegTestActivity.java
@@ -2,6 +2,7 @@ package com.github.xch168.ffmpeg.invoker.demo;
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.app.ProgressDialog;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
@@ -15,12 +16,15 @@ import com.github.xch168.ffmpeg.invoker.FFmpegInvoker;
 import java.io.File;
 
 public class FFmpegTestActivity extends AppCompatActivity {
+    private ProgressDialog mProgressDialog;
+
     private String videoPath = "/storage/emulated/0/DCIM/Camera/fb639313f7f3d58cc793f20095439c88.mp4";
 
     private FFmpegInvoker.Callback mCallback = new FFmpegInvoker.Callback() {
         @Override
         public void onSuccess() {
             Looper.prepare();
+            hideProgress();
             Toast.makeText(FFmpegTestActivity.this, "处理成功", Toast.LENGTH_SHORT).show();
             Looper.loop();
         }
@@ -28,13 +32,14 @@ public class FFmpegTestActivity extends AppCompatActivity {
         @Override
         public void onFailure() {
             Looper.prepare();
+            hideProgress();
             Toast.makeText(FFmpegTestActivity.this, "处理失败", Toast.LENGTH_SHORT).show();
             Looper.loop();
         }
 
         @Override
         public void onProgress(float progress) {
-
+            updateProgress((int) progress);
         }
     };
 
@@ -49,13 +54,42 @@ public class FFmpegTestActivity extends AppCompatActivity {
         context.startActivity(intent);
     }
 
+    private void showProgress() {
+        if (mProgressDialog == null) {
+            mProgressDialog = new ProgressDialog(this);
+            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
+            mProgressDialog.setCanceledOnTouchOutside(false);
+            mProgressDialog.setMax(100);
+            mProgressDialog.setTitle("正在处理");
+        }
+        mProgressDialog.setProgress(0);
+        mProgressDialog.show();
+    }
+
+    private void hideProgress() {
+        if (mProgressDialog != null) {
+            runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    mProgressDialog.hide();
+                }
+            });
+        }
+    }
+
+    private void updateProgress(int percent) {
+        mProgressDialog.setProgress(percent);
+    }
+
     public void cutVideo(View view) {
+        showProgress();
         String savePath = getSaveDir() + "out.mp4";
-        String cmd = "ffmpeg -y -ss 1 -t 100 -accurate_seek -i " + videoPath + " -codec copy " + savePath;
+        String cmd = "ffmpeg -y -ss 1 -t 300 -accurate_seek -i " + videoPath + " -codec copy " + savePath;
         FFmpegInvoker.exec(cmd.split(" "), 100, mCallback);
     }
 
     public void extractFrame(View view) {
+        showProgress();
         String savePath = getSaveDir() + "out.png";
         String cmd = "ffmpeg -ss 10 -i " + videoPath + " -vframes 1 -y " + savePath;
         FFmpegInvoker.exec(cmd.split(" "), 100, mCallback);