问如何减少视频延迟，ffmpeg将rtsp流转换hls 延迟超10秒？

FFmpeg 执行命令：ffmpeg -i rtsp://xxx.xxx.xxx.xxx/live/chn0 -fflags flush_packets -max_delay 1 -hls_flags delete_segments -hls_time 2 -g 15 /home/pub/video/hlsdb/test.m3u8 

nginx config:

location /hlsdb {     
           #server hls fragments     
           types{     
             application/vnd.apple.mpegurl m3u8;     
             video/mp2t ts;     
           }         
           root /home/pub/video/hlsdb;
           add_header Cache-Control no-cache;
		   add_header Access-Control-Allow-Origin *; 
		   add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE;
        }
        
前端用了一个EasyPlayer.js 播放 m3u8/HLS;