如何减少hls nginx rtmp的延迟？

Question

此hls文件由实时流媒体生成：

 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-MEDIA-SEQUENCE:0
 #EXT-X-TARGETDURATION:11
 #EXT-X-DISCONTINUITY
 #EXTINF:8.033,
  mys-0.ts
 #EXTINF:3.367,
 mys-1.ts
 #EXTINF:8.333,
 mys-2.ts
  #EXTINF:7.934,
 mys-3.ts
 #EXTINF:8.333,
 mys-4.ts

如何减少一个文件的持续时间？我尝试设置nginx config：hls_fragment 3; hls_playlist_length 30;