diff --git a/app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.kt b/app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.kt
index fdf0006..1d6d4fa 100644
--- a/app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.kt
+++ b/app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.kt
@@ -119,7 +119,8 @@ class VideoHandleActivity : BaseActivity() {
                 R.id.btn_flv,
                 R.id.btn_thumbnail,
                 R.id.btn_add_subtitle,
-                R.id.btn_rotate
+                R.id.btn_rotate,
+                R.id.btn_gop
         )
     }
 
@@ -339,6 +340,12 @@ class VideoHandleActivity : BaseActivity() {
                 val addSubtitlePath = PATH + File.separator + "rotate" + rotateDegree + suffix
                 commandLine = FFmpegUtil.rotateVideo(srcFile, rotateDegree, addSubtitlePath)
             }
+            R.id.btn_gop// change the gop(key frame interval) of video
+            -> {
+                val gop = 30
+                val gopPath = PATH + File.separator + "gop" + gop + suffix
+                commandLine = FFmpegUtil.changeGOP(srcFile, gop, gopPath)
+            }
             else -> {
             }
         }
diff --git a/app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java b/app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java
index 0b54844..3edf4ec 100644
--- a/app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java
+++ b/app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java
@@ -699,4 +699,10 @@ public class FFmpegUtil {
         return rotateCmd.split(" ");
     }
 
+    public static String[] changeGOP(String inputPath, int gop, String outputPath) {
+        String rotateCmd = "ffmpeg -i %s -g %d %s";
+        rotateCmd = String.format(Locale.getDefault(), rotateCmd, inputPath, gop, outputPath);
+        return rotateCmd.split(" ");
+    }
+
 }
diff --git a/app/src/main/res/layout/activity_video_handle.xml b/app/src/main/res/layout/activity_video_handle.xml
index f1ecc29..4be7d01 100644
--- a/app/src/main/res/layout/activity_video_handle.xml
+++ b/app/src/main/res/layout/activity_video_handle.xml
@@ -156,6 +156,13 @@
                 android:layout_marginTop="4dp"
                 android:text="@string/video_rotate"/>
 
+            <Button
+                android:id="@+id/btn_gop"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:text="@string/video_gop"/>
+
         </LinearLayout>
     </ScrollView>
 
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
index 64d3a6b..e688121 100644
--- a/app/src/main/res/values-en/strings.xml
+++ b/app/src/main/res/values-en/strings.xml
@@ -60,6 +60,7 @@
     <string name="video_flv">FLV index</string>
     <string name="video_thumbnail">Insert thumbnail</string>
     <string name="video_subtitle">add subtitle</string>
+    <string name="video_gop">KeyFrame interval</string>
 
     <string name="swap">Swap</string>
     <string name="start">Start</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 96855d5..c05c593 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -42,7 +42,7 @@
     <string name="video_transform">视频转码</string>
     <string name="video_screen_shot">视频截图</string>
     <string name="video_screen_record">屏幕录制</string>
-    <string name="video_from_photo">图片合成视频</string>
+    <string name="video_from_photo">合成视频</string>
     <string name="video_extract_frame">视频抽帧</string>
     <string name="video_part_zoom">视频局部放大</string>
     <string name="video_play">视频播放</string>
@@ -60,6 +60,7 @@
     <string name="video_flv">FLV索引</string>
     <string name="video_thumbnail">插入封面</string>
     <string name="video_subtitle">添加字幕</string>
+    <string name="video_gop">关键帧间隔</string>
 
     <string name="swap">切换</string>
     <string name="start">开始</string>