Replace MFX major version assertion to warning

modules/gapi/src/streaming/onevpl/source_priv.cpp

@@ -227,10 +227,10 @@ GSource::Priv::Priv(std::shared_ptr<IDataProvider> provider,
 
         // TODO  Add factory static method in ProcessingEngineBase
         if (mfx_impl_description->ApiVersion.Major >= VPL_NEW_API_MAJOR_VERSION) {
-            GAPI_Assert(false &&
+            GAPI_LOG_WARNING(NULL,
                         "GSource mfx_impl_description->ApiVersion.Major >= VPL_NEW_API_MAJOR_VERSION"
-                        " - is not implemented");
-        } else {
+                        " - is not implemented. G-API only supports an older version of OneVPL API.");
+        }
         const auto& transcode_params = VPLLegacyTranscodeEngine::get_vpp_params(preferred_params);
         if (!transcode_params.empty()) {
             engine.reset(new VPLLegacyTranscodeEngine(std::move(acceleration)));
@@ -238,7 +238,6 @@ GSource::Priv::Priv(std::shared_ptr<IDataProvider> provider,
             engine.reset(new VPLLegacyDecodeEngine(std::move(acceleration)));
         }
     }
-    }
 
     // create engine session for processing mfx session pipeline
     auto engine_session_ptr = engine->initialize_session(mfx_session, cfg_params,