diff --git a/src/components/SignalSourceTree.vue b/src/components/SignalSourceTree.vue
index 9451a03..eb0d7e7 100644
--- a/src/components/SignalSourceTree.vue
+++ b/src/components/SignalSourceTree.vue
@@ -428,7 +428,11 @@ export default defineComponent({
           });
         }
       },
-      updateContextMenu() {},
+      updateContextMenu() {
+        lossy_pic.value =
+          GlobalData.getInstance().applicationConfig?.hdmi_in_decode_type_1 ==
+          "NV12";
+      },
       async setHdmiInDecodeType(index: number, type: string) {
         let success = false;