diff --git a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/invite/request/InviteRequestProcessor.java b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/invite/request/InviteRequestProcessor.java
index 2792df1..5f091be 100644
--- a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/invite/request/InviteRequestProcessor.java
+++ b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/invite/request/InviteRequestProcessor.java
@@ -5,6 +5,8 @@ import cn.skcks.docking.gb28181.core.sip.listener.SipListener;
 import cn.skcks.docking.gb28181.core.sip.message.processor.MessageProcessor;
 import cn.skcks.docking.gb28181.core.sip.utils.SipUtil;
 import cn.skcks.docking.gb28181.mocking.core.sip.gb28181.sdp.GB28181DescriptionParser;
+import cn.skcks.docking.gb28181.mocking.core.sip.response.SipResponseBuilder;
+import cn.skcks.docking.gb28181.mocking.core.sip.sender.SipSender;
 import gov.nist.javax.sip.message.SIPRequest;
 import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
@@ -12,16 +14,24 @@ import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
 
+import javax.sdp.Media;
+import javax.sdp.MediaDescription;
+import javax.sdp.SdpParseException;
 import javax.sip.RequestEvent;
 import javax.sip.header.CallIdHeader;
 import javax.sip.message.Request;
+import javax.sip.message.Response;
 import java.util.EventObject;
+import java.util.Vector;
 
 @Slf4j
 @RequiredArgsConstructor
 @Component
 public class InviteRequestProcessor implements MessageProcessor {
     private final SipListener sipListener;
+
+    private final SipSender sender;
+
     @PostConstruct
     @Override
     public void init() {
@@ -37,10 +47,30 @@ public class InviteRequestProcessor implements MessageProcessor {
         String deviceId = SipUtil.getUserIdFromFromHeader(request);
         CallIdHeader callIdHeader = request.getCallIdHeader();
         String senderIp = request.getLocalAddress().getHostAddress();
+        String transport = request.getTopmostViaHeader().getTransport();
         String content = new String(request.getRawContent());
-        log.info("{}", content);
-
         GB28181Description gb28181Description = new GB28181DescriptionParser(content).parse();
-        log.info("{}", gb28181Description);
+        log.info("解析的 sdp信息: \n{}", gb28181Description);
+        Vector<?> mediaDescriptions = gb28181Description.getMediaDescriptions(true);
+        log.info("mediaDescriptions {}",mediaDescriptions);
+        mediaDescriptions.stream().filter(item->{
+            MediaDescription mediaDescription = (MediaDescription)item;
+            Media media = mediaDescription.getMedia();
+            try {
+                Vector<?> mediaFormats = media.getMediaFormats(false);
+                return mediaFormats.contains("98");
+            } catch (SdpParseException e) {
+                log.error("sdp media 解析异常: {}", e.getMessage());
+                return false;
+            }
+        }).findFirst().ifPresentOrElse((ignore)->{
+            log.info("{}", ignore);
+        },()->{
+            log.info("未找到支持的媒体类型");
+            sender.sendResponse(senderIp,transport, ((provider, ip, port) ->
+                    SipResponseBuilder.response(request,
+                            Response.UNSUPPORTED_MEDIA_TYPE,
+                            "Unsupported Media Type")));
+        });
     }
 }