audiovisualizer: Don't try to sync controller values to invalid timestamp

diff --git a/ext/libvisual/gstaudiovisualizer.c b/ext/libvisual/gstaudiovisualizer.c
index aead4f1..0bb1915 100644 (file)
--- a/ext/libvisual/gstaudiovisualizer.c
+++ b/ext/libvisual/gstaudiovisualizer.c
@@ -1117,7 +1117,8 @@ gst_audio_visualizer_chain (GstPad * pad, GstObject * parent,
       break;
 
     /* sync controlled properties */
-    gst_object_sync_values (GST_OBJECT (scope), ts);
+    if (GST_CLOCK_TIME_IS_VALID (ts))
+      gst_object_sync_values (GST_OBJECT (scope), ts);
 
     GST_BUFFER_TIMESTAMP (outbuf) = ts;
     GST_BUFFER_DURATION (outbuf) = scope->frame_duration;