去除ssrc作为流ID传递，ssrc只作为sdp消息使用。动态端口的情况下支持固定流地址，同时支持未点播时直接播放流地址，代码自动发起点播

src/main/java/com/genersoft/iot/vmp/gb28181/bean/DeviceChannel.java

@@ -141,7 +141,7 @@ public class DeviceChannel {
 	/**
 	 * 流唯一编号，存在表示正在直播
 	 */
-	private String  ssrc;
+	private String  streamId;
 
 	/**
 	 *  是否含有音频
@@ -379,14 +379,6 @@ public class DeviceChannel {
 		this.subCount = subCount;
 	}
 
-	public String getSsrc() {
-		return ssrc;
-	}
-
-	public void setSsrc(String ssrc) {
-		this.ssrc = ssrc;
-	}
-
 	public boolean isHasAudio() {
 		return hasAudio;
 	}
@@ -402,4 +394,12 @@ public class DeviceChannel {
 	public void setPlay(boolean play) {
 		this.play = play;
 	}
+
+	public String getStreamId() {
+		return streamId;
+	}
+
+	public void setStreamId(String streamId) {
+		this.streamId = streamId;
+	}
 }

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java

@@ -277,17 +277,22 @@ public class SIPCommander implements ISIPCommander {
 		try {
 
 			String ssrc = streamSession.createPlaySsrc();
+			String streamId = null;
+			if (rtpEnable) {
+				streamId = String.format("gb_play_%s_%s", device.getDeviceId(), channelId);
+			}else {
+				streamId = String.format("%08x", Integer.parseInt(ssrc)).toUpperCase();
+			}
 			String streamMode = device.getStreamMode().toUpperCase();
 			MediaServerConfig mediaInfo = storager.getMediaInfo();
 			String mediaPort = null;
 			// 使用动态udp端口
 			if (rtpEnable) {
-				mediaPort = zlmUtils.getNewRTPPort(ssrc) + "";
+				mediaPort = zlmUtils.getNewRTPPort(streamId) + "";
 			}else {
 				mediaPort = mediaInfo.getRtpProxyPort();
 			}
 
-			String streamId = String.format("%08x", Integer.parseInt(ssrc)).toUpperCase();
 			// 添加订阅
 			JSONObject subscribeKey = new JSONObject();
 			subscribeKey.put("app", "rtp");
@@ -330,10 +335,10 @@ public class SIPCommander implements ISIPCommander {
 			Request request = headerProvider.createInviteRequest(device, channelId, content.toString(), null, "live", null, ssrc);
 
 			ClientTransaction transaction = transmitRequest(device, request);
-			streamSession.put(ssrc, transaction);
+			streamSession.put(streamId, transaction);
 			DeviceChannel deviceChannel = storager.queryChannel(device.getDeviceId(), channelId);
 			if (deviceChannel != null) {
-				deviceChannel.setSsrc(ssrc);
+				deviceChannel.setStreamId(streamId);
 				storager.updateChannel(device.getDeviceId(), deviceChannel);
 			}
 
@@ -378,7 +383,7 @@ public class SIPCommander implements ISIPCommander {
 			String mediaPort = null;
 			// 使用动态udp端口
 			if (rtpEnable) {
-				mediaPort = zlmUtils.getNewRTPPort(ssrc) + "";
+				mediaPort = zlmUtils.getNewRTPPort(streamId) + "";
 			}else {
 				mediaPort = mediaInfo.getRtpProxyPort();
 			}
@@ -412,7 +417,7 @@ public class SIPCommander implements ISIPCommander {
 	        Request request = headerProvider.createPlaybackInviteRequest(device, channelId, content.toString(), null, "playback", null);
 	
 	        ClientTransaction transaction = transmitRequest(device, request);
-	        streamSession.put(ssrc, transaction);
+	        streamSession.put(streamId, transaction);
 
 		} catch ( SipException | ParseException | InvalidArgumentException e) {
 			e.printStackTrace();
@@ -424,10 +429,10 @@ public class SIPCommander implements ISIPCommander {
 	 * 
 	 */
 	@Override
-	public void streamByeCmd(String ssrc) {
+	public void streamByeCmd(String streamId) {
 		
 		try {
-			ClientTransaction transaction = streamSession.get(ssrc);
+			ClientTransaction transaction = streamSession.get(streamId);
 			if (transaction == null) {
 				return;
 			}
@@ -453,7 +458,7 @@ public class SIPCommander implements ISIPCommander {
 				clientTransaction = udpSipProvider.getNewClientTransaction(byeRequest);
 			}
 			dialog.sendRequest(clientTransaction);
-			streamSession.remove(ssrc);
+			streamSession.remove(streamId);
 		} catch (TransactionDoesNotExistException e) {
 			e.printStackTrace();
 		} catch (SipException e) {

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/request/impl/MessageRequestProcessor.java

@@ -450,7 +450,7 @@ public class MessageRequestProcessor extends SIPRequestAbstractProcessor {
 				StreamInfo streamInfo = storager.queryPlaybackByDevice(deviceId, "*");
 				if (streamInfo != null) {
 					storager.stopPlayback(streamInfo);
-					cmder.streamByeCmd(streamInfo.getSsrc());
+					cmder.streamByeCmd(streamInfo.getStreamId());
 				}
 			}
 		} catch (ParseException | SipException | InvalidArgumentException | DocumentException e) {