Using GST structure to confirm video decoding stream format.

src/VideoReceiver/GstVideoReceiver.cc

@@ -717,18 +717,21 @@ GstVideoReceiver::_filterParserCaps(GstElement* bin, GstPad* pad, GstElement* el
 
     GstCaps* filter;
 
-    if ((filter = gst_caps_from_string("video/x-h264")) != nullptr) {
+    GstStructure* structure;
+
+    structure = gst_caps_get_structure(srcCaps, 0);
+    if(gst_structure_has_name(structure, "video/x-h265")){
+        filter = gst_caps_from_string("video/x-h265");
         if (gst_caps_can_intersect(srcCaps, filter)) {
-            sinkCaps = gst_caps_from_string("video/x-h264,stream-format=avc");
+            sinkCaps = gst_caps_from_string("video/x-h265,stream-format=hvc1");
         }
-
         gst_caps_unref(filter);
         filter = nullptr;
-    } else if ((filter = gst_caps_from_string("video/x-h265")) != nullptr) {
+    } else if(gst_structure_has_name(structure, "video/x-h264")){
+        filter = gst_caps_from_string("video/x-h264");
         if (gst_caps_can_intersect(srcCaps, filter)) {
-            sinkCaps = gst_caps_from_string("video/x-h265,stream-format=hvc1");
+            sinkCaps = gst_caps_from_string("video/x-h264,stream-format=avc");
         }
-
         gst_caps_unref(filter);
         filter = nullptr;
     }