diff --git a/app/src/main/java/com/ray650128/gstreamer_demo_app/GridVideoFragment.kt b/app/src/main/java/com/ray650128/gstreamer_demo_app/GridVideoFragment.kt
index 7def1d5..f4ed685 100644
--- a/app/src/main/java/com/ray650128/gstreamer_demo_app/GridVideoFragment.kt
+++ b/app/src/main/java/com/ray650128/gstreamer_demo_app/GridVideoFragment.kt
@@ -1,6 +1,5 @@
 package com.ray650128.gstreamer_demo_app
 
-import android.graphics.Color
 import android.os.Bundle
 import android.util.DisplayMetrics
 import android.util.Log
@@ -184,6 +183,8 @@ class GridVideoFragment : Fragment(), GstCallback {
         when (gstStatus) {
             GstStatus.PAUSE -> videoViews[index].isPlaying = false
             GstStatus.PLAYING -> videoViews[index].isPlaying = true
+            GstStatus.ERROR_WHEN_OPENING -> videoViews[index].isPlaying = false
+            GstStatus.ERROR -> videoViews[index].isPlaying = false
             else -> {}
         }
         Log.d("${TAG}_$mPageNum", "GstPlayer #$index status: $gstStatus")
diff --git a/gstreamer_player/src/com/hisharp/gstreamer_player/GstLibrary.java b/gstreamer_player/src/com/hisharp/gstreamer_player/GstLibrary.java
index c980760..870a916 100644
--- a/gstreamer_player/src/com/hisharp/gstreamer_player/GstLibrary.java
+++ b/gstreamer_player/src/com/hisharp/gstreamer_player/GstLibrary.java
@@ -41,7 +41,6 @@ public class GstLibrary implements SurfaceHolder.Callback {
     private native void nativeFinalize(); // Destroy pipeline and shutdown native code
     private native void nativeSetUri(String uri); // Set the URI of the media to play
     private native void nativePlay();     // Set pipeline to PLAYING
-    private native void nativeSetPosition(int milliseconds); // Seek to the indicated position, in milliseconds
     private native void nativePause();    // Set pipeline to PAUSED
     private static native boolean nativeClassInit(); // Initialize native class: cache Method IDs for callbacks
     private native void nativeSurfaceInit(Object surface); // A new surface is available
@@ -81,6 +80,10 @@ public class GstLibrary implements SurfaceHolder.Callback {
         } else if (message.contains("State changed to PLAYING")) {
             gstCallback.onStatus(this, GstStatus.PLAYING);
         } else if (message.contains("Could not open resource for reading and writing")) {
+            gstCallback.onStatus(this, GstStatus.ERROR_WHEN_OPENING);
+        } else if (message.contains("GStreamer encountered a general supporting library error")) {
+            gstCallback.onStatus(this, GstStatus.ERROR);
+        } else if (message.contains("Unhandled error")) {
             gstCallback.onStatus(this, GstStatus.ERROR);
         }
         gstCallback.onMessage(this, message);
@@ -97,12 +100,8 @@ public class GstLibrary implements SurfaceHolder.Callback {
 
         // Restore previous playing state
         nativeSetUri (rtspUrl);
-        nativeSetPosition (0);
     }
 
-    // Called from native code
-    private void setCurrentPosition(final int position, final int duration) {}
-
     // Called from native code when the size of the media changes or is first detected.
     // Inform the video surface about the new size and recalculate the layout.
     private void onMediaSizeChanged (int width, int height) {
@@ -122,8 +121,7 @@ public class GstLibrary implements SurfaceHolder.Callback {
 
     public void surfaceChanged(SurfaceHolder holder, int format, int width,
             int height) {
-        Log.d("GStreamer", "Surface changed to format " + format + " width "
-                + width + " height " + height);
+        Log.d("GStreamer", "Surface changed to format " + format + " width " + width + " height " + height);
         nativeSurfaceInit (holder.getSurface());
     }
 
diff --git a/gstreamer_player/src/com/hisharp/gstreamer_player/GstStatus.java b/gstreamer_player/src/com/hisharp/gstreamer_player/GstStatus.java
index e511276..2d687fc 100644
--- a/gstreamer_player/src/com/hisharp/gstreamer_player/GstStatus.java
+++ b/gstreamer_player/src/com/hisharp/gstreamer_player/GstStatus.java
@@ -4,5 +4,6 @@ public enum GstStatus {
     READY,
     PAUSE,
     PLAYING,
-    ERROR
+    ERROR,
+    ERROR_WHEN_OPENING
 }