diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java
index a9b64ca2..8960e2c7 100644
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java
@@ -146,6 +146,11 @@ public class SIPCommander implements ISIPCommander {
         builder.append(strTmp, 0, 2);
         strTmp = String.format("%02X", parameter2);
         builder.append(strTmp, 0, 2);
+        //优化zoom变倍速率
+        if ((combineCode2 > 0) && (combineCode2 <16))
+        {
+            combineCode2 = 16;
+        }
         strTmp = String.format("%X", combineCode2);
         builder.append(strTmp, 0, 1).append("0");
         //计算校验码
diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/utils/SipUtils.java b/src/main/java/com/genersoft/iot/vmp/gb28181/utils/SipUtils.java
index d6037a11..a7ce8c0b 100644
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/utils/SipUtils.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/utils/SipUtils.java
@@ -113,6 +113,12 @@ public class SipUtils {
         strTmp = String.format("%02X", moveSpeed);
         builder.append(strTmp, 0, 2);
         builder.append(strTmp, 0, 2);
+        
+        //优化zoom低倍速下的变倍速率
+        if ((zoomSpeed > 0) && (zoomSpeed <16))
+        {
+            zoomSpeed = 16;
+        }
         strTmp = String.format("%X", zoomSpeed);
         builder.append(strTmp, 0, 1).append("0");
         //计算校验码