diff --git a/src/main/java/com/genersoft/iot/vmp/media/service/impl/MediaServerServiceImpl.java b/src/main/java/com/genersoft/iot/vmp/media/service/impl/MediaServerServiceImpl.java
index d8f5ba95..ae3d7c39 100755
--- a/src/main/java/com/genersoft/iot/vmp/media/service/impl/MediaServerServiceImpl.java
+++ b/src/main/java/com/genersoft/iot/vmp/media/service/impl/MediaServerServiceImpl.java
@@ -763,7 +763,7 @@ public class MediaServerServiceImpl implements IMediaServerService {
             calld = streamAuthorityInfo.getCallId();
         }
         List<StreamInfo> streamInfoList = getMediaList(mediaInfo, app, stream, calld);
-        if (streamInfoList.isEmpty()) {
+        if (streamInfoList == null || streamInfoList.isEmpty()) {
             return null;
         }else {
             return streamInfoList.get(0);