diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/controller/PlaybackController.java b/src/main/java/com/genersoft/iot/vmp/gb28181/controller/PlaybackController.java
index 11b221592..3b1fb108c 100755
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/controller/PlaybackController.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/controller/PlaybackController.java
@@ -215,7 +215,7 @@ public class PlaybackController {
 
 	@Operation(summary = "回放倍速播放", security = @SecurityRequirement(name = JwtUtils.HEADER))
 	@Parameter(name = "streamId", description = "回放流ID", required = true)
-	@Parameter(name = "speed", description = "倍速0.25 0.5 1、2、4", required = true)
+	@Parameter(name = "speed", description = "倍速0.25 0.5 1、2、4、8", required = true)
 	@GetMapping("/speed/{streamId}/{speed}")
 	public void playSpeed(@PathVariable String streamId, @PathVariable Double speed) {
 		log.info("playSpeed: "+streamId+", "+speed);
@@ -225,10 +225,6 @@ public class PlaybackController {
 			log.warn("streamId不存在!");
 			throw new ControllerException(ErrorCode.ERROR400.getCode(), "streamId不存在");
 		}
-		if(speed != 0.25 && speed != 0.5 && speed != 1 && speed != 2.0 && speed != 4.0) {
-			log.warn("不支持的speed： " + speed);
-			throw new ControllerException(ErrorCode.ERROR100.getCode(), "不支持的speed（0.25 0.5 1、2、4）");
-		}
 		Device device = deviceService.getDeviceByDeviceId(inviteInfo.getDeviceId());
 		DeviceChannel channel = channelService.getOneById(inviteInfo.getChannelId());
 		try {
diff --git a/zlm.md b/zlm.md
index f6fa4617a..bbaf32953 100644
--- a/zlm.md
+++ b/zlm.md
@@ -13,4 +13,3 @@
 3. loadMP4File扩展， 增加默认seek值和默认倍速，开始时直接从这个位置开始，并使用指定的倍速
 4. 支持下载指定取件的mp4文件，这个区间可能包括多个文件和文件的一部分。
 5. 希望seek接口和倍速接口可以去除schema的必选，作为可选项，不传则默认全部
-6. 可选： seek值如果可以换算为日期，会有更好的体验， 比如2025-4-15 12:32:11