diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/ISIPCommander.java b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/ISIPCommander.java
index 6238b70c..2da00105 100644
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/ISIPCommander.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/ISIPCommander.java
@@ -140,7 +140,7 @@ public interface ISIPCommander {
 	/**
 	 * 回放倍速播放
 	 */
-	void playSpeedCmd(Device device, StreamInfo streamInfo, String speed);
+	void playSpeedCmd(Device device, StreamInfo streamInfo, Double speed);
 
 	/**
 	 * 语音广播
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 d90705c3..c229decc 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
@@ -1630,12 +1630,12 @@ public class SIPCommander implements ISIPCommander {
 	 * 回放倍速播放
 	 */
 	@Override
-	public void playSpeedCmd(Device device, StreamInfo streamInfo, String speed) {
+	public void playSpeedCmd(Device device, StreamInfo streamInfo, Double speed) {
 		try {
 			StringBuffer content = new StringBuffer(200);
 			content.append("PLAY RTSP/1.0\r\n");
 			content.append("CSeq: " + InfoCseqCache.CSEQCACHE.get(streamInfo.getStreamId()) + "\r\n");
-			content.append("Scale: " + speed + ".000000\r\n");
+			content.append("Scale: " + String.format("%.1f",speed) + "\r\n");
 			Request request = headerProvider.createInfoRequest(device, streamInfo, content.toString());
 			logger.info(request.toString());
 			ClientTransaction clientTransaction = null;
diff --git a/src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/playback/PlaybackController.java b/src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/playback/PlaybackController.java
index 90ecfd42..a0290732 100644
--- a/src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/playback/PlaybackController.java
+++ b/src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/playback/PlaybackController.java
@@ -221,10 +221,10 @@ public class PlaybackController {
 	@ApiOperation("回放倍速播放")
 	@ApiImplicitParams({
 			@ApiImplicitParam(name = "streamId", value = "回放流ID", dataTypeClass = String.class),
-			@ApiImplicitParam(name = "speed", value = "倍速 1、2、4", dataTypeClass = String.class),
+			@ApiImplicitParam(name = "speed", value = "倍速0.25 0.5 1、2、4", dataTypeClass = Double.class),
 	})
 	@GetMapping("/speed/{streamId}/{speed}")
-	public ResponseEntity<String> playSpeed(@PathVariable String streamId, @PathVariable String speed) {
+	public ResponseEntity<String> playSpeed(@PathVariable String streamId, @PathVariable Double speed) {
 		logger.info("playSpeed: "+streamId+", "+speed);
 		JSONObject json = new JSONObject();
 		StreamInfo streamInfo = redisCatchStorage.queryPlaybackByStreamId(streamId);
@@ -233,6 +233,11 @@ public class PlaybackController {
 			logger.warn("streamId不存在!");
 			return new ResponseEntity<String>(json.toString(), HttpStatus.BAD_REQUEST);
 		}
+		if(speed != 0.25 && speed != 0.5 && speed != 1 && speed != 2.0 && speed != 4.0) {
+			json.put("msg", "不支持的speed（0.25 0.5 1、2、4）");
+			logger.warn("不支持的speed： " + speed);
+			return new ResponseEntity<String>(json.toString(), HttpStatus.BAD_REQUEST);
+		}
 		setCseq(streamId);
 		Device device = storager.queryVideoDevice(streamInfo.getDeviceID());
 		cmder.playSpeedCmd(device, streamInfo, speed);