diff --git a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainActivity.kt b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainActivity.kt
index 8c3091f..2f0ea78 100644
--- a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainActivity.kt
+++ b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/MainActivity.kt
@@ -65,27 +65,19 @@ class MainActivity : AppCompatActivity() {
 
         viewPager.apply {
             adapter = splitVideoViewAdapter
-            offscreenPageLimit = 1
+            offscreenPageLimit = 100
             setPageTransformer(null)
             registerOnPageChangeCallback(object: ViewPager2.OnPageChangeCallback() {
                 private var oldPage = 0
                 override fun onPageScrollStateChanged(state: Int) {
                     super.onPageScrollStateChanged(state)
-                    if (state == ViewPager2.SCROLL_STATE_DRAGGING) {
+                    /*if (state == ViewPager2.SCROLL_STATE_DRAGGING) {
                         oldPage = currentPage
                         splitVideoViewAdapter.stop(currentPage)
                     }
                     if (state == ViewPager2.SCROLL_STATE_IDLE && currentPage == oldPage) {
                         splitVideoViewAdapter.play(currentPage)
-                    }
-                    /*Log.d("Split", "onPageScrollStateChanged: ${
-                        when(state) {
-                            ViewPager2.SCROLL_STATE_IDLE -> "SCROLL_STATE_IDLE"
-                            ViewPager2.SCROLL_STATE_DRAGGING -> "SCROLL_STATE_DRAGGING"
-                            ViewPager2.SCROLL_STATE_SETTLING -> "SCROLL_STATE_SETTLING"
-                            else -> ""
-                        }
-                    }")*/
+                    }*/
                     //Log.d("Split", "oldPage: $oldPage, currentPage: $currentPage")
                 }
                 override fun onPageScrolled(
diff --git a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
index eddf60f..4793313 100644
--- a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
+++ b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/SplitViewFragment.kt
@@ -57,38 +57,42 @@ class SplitViewFragment : Fragment() {
 
         initView()
 
-        viewModel.activePage.observe(viewLifecycleOwner) {
+        /*viewModel.activePage.observe(viewLifecycleOwner) {
             if (it == null) return@observe
             if (it == this.mPageNum) {
-                playAll()
+                MainScope().launch {
+                    //delay(1000)
+                    //playAll()
+                }
             } else {
-                stopAll()
+                //stopAll()
             }
-        }
+        }*/
     }
 
     override fun onPause() {
-        stopAll()
+        //stopAll()
         super.onPause()
         Log.d("${TAG}_$mPageNum", "onPause()")
     }
 
     override fun onResume() {
         super.onResume()
-        if (viewModel.activePage.value == mPageNum) {
+        //if (viewModel.activePage.value == mPageNum) {
             MainScope().launch {
-                delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
+                //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
                 playAll()
             }
-        }
+        //}
         Log.d("${TAG}_$mPageNum", "onResume()")
     }
 
-    /*override fun onDestroy() {
+    override fun onDestroy() {
         super.onDestroy()
-        destroyAll()
+        //destroyAll()
+        stopAll()
         Log.d("${TAG}_$mPageNum", "onDestroy()")
-    }*/
+    }
 
     private fun initView() {
         // 生成 VideoView 分割畫面
@@ -164,7 +168,7 @@ class SplitViewFragment : Fragment() {
                             MainScope().launch {
                                 stopAll()
                                 //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
-                                delay((splitMode * 100) + Constants.CONF_DELAY_BASE_MILLIS)
+                                //delay((splitMode * 100) + Constants.CONF_DELAY_BASE_MILLIS)
                                 val item = data[position]
                                 val bundle = Bundle().apply {
                                     //putInt(MonitoringActivity.BUNDLE_DEVICE_ID, item.id)
@@ -191,32 +195,34 @@ class SplitViewFragment : Fragment() {
         }
     }
 
-    fun playAll() = MainScope().launch(Dispatchers.Main) {
-        if (videoViews.isEmpty()) return@launch
+    fun playAll() /*= MainScope().launch(Dispatchers.Main)*/ {
+        if (videoViews.isEmpty()) return
+        //delay(splitMode * Constants.CONF_DELAY_BASE_MILLIS)
         for (index in data.indices) {
+            if (!videoViews[index].isReady) continue
             videoViews[index].resetRetryCount()
             videoViews[index].play()
-            delay(300)
+            //delay(300)
         }
-    }.start()
+    }//.start()
 
-    fun stopAll() = MainScope().launch(Dispatchers.Main) {
-        if (videoViews.isEmpty()) return@launch
+    fun stopAll() /*= MainScope().launch(Dispatchers.Main)*/ {
+        if (videoViews.isEmpty()) return
         for (index in data.indices) {
             videoViews[index].stopRetryCount()
             if (!videoViews[index].isPlaying || videoViews[index].isLoading) continue
             videoViews[index].stop()
-            delay(100)
+            //delay(300)
         }
-    }.start()
+    }//.start()
 
-    fun destroyAll() = MainScope().launch(Dispatchers.Main) {
-        if (videoViews.isEmpty()) return@launch
+    fun destroyAll() /*= MainScope().launch(Dispatchers.Main)*/ {
+        if (videoViews.isEmpty()) return
         for (index in data.indices) {
             videoViews[index].destroy()
-            delay(100)
+            //delay(100)
         }
-    }.start()
+    }//.start()
 
     companion object {
         private val TAG = SplitViewFragment::class.java.simpleName
diff --git a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoView.kt b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoView.kt
index d89ee66..f81fd5e 100644
--- a/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoView.kt
+++ b/app/src/main/java/com/ray650128/gstreamer_demo_app/ui/mainScreen/VideoView.kt
@@ -36,6 +36,8 @@ class VideoView : ConstraintLayout, GstCallback {
 
     private var data: Device? = null
 
+    var isReady: Boolean = false
+
     var isLoading: Boolean = false
         set(value) {
             view.pbLoading.isVisible = value
@@ -132,6 +134,7 @@ class VideoView : ConstraintLayout, GstCallback {
 
     override fun onStatus(gstStatus: GstStatus?) {  // onStatus 不是在主執行緒，因此透過 Handler 發訊息到主執行緒去執行
         when (gstStatus) {
+            GstStatus.READY -> isReady = true
             GstStatus.PLAYING -> mHandler.sendMessage(Message().apply { what = MSG_PLAY })
             GstStatus.PAUSE -> mHandler.sendMessage(Message().apply { what = MSG_PAUSE })
             //GstStatus.ERROR_WHEN_OPENING -> mHandler.sendMessage(Message().apply { what = MSG_PAUSE })