我發現在flv.js拉流的時候，他會去取比較舊的資料
例如我直播推流30秒後才拉流，他會從大概20秒前的影像開始撥放
但是如果我一推流就拉流，延遲大概就只有4、5秒

請問要如何解決這個狀況呢?
另外以直播為目標要怎麼降低延遲呢?

• 推流本地的攝像頭

ffmpeg -f dshow -i video="USB2.0 VGA UVC WebCam" -c:v libx264 -preset ultrafast -tune zerolatency -r 12 -an -f flv rtmp://3.3.3.3/live/demo

• flvjs拉流

if(flvjs.isSupported()){
        console.log("flv is supported");
        var streamid = 'demo';
        var mediaDataSource = {
            type: 'flv',
            url: 'https://3.3.3.3/live?port=1935&app=live&stream='+streamid,
            hasAudio: false,
            isLive: true
        };
        var element = document.getElementById('debugtest');
        if (typeof player != "undefined") {
            if (player != null) {
                player.unload();
                player.detachMediaElement();
                player.destroy();
                player = null;
            }
        }
        player = flvjs.createPlayer(mediaDataSource);
        player.attachMediaElement(element);
        player.load();
}

• nginx-http-flv-module配置

rtmp {
        server {
        listen 1935;
        chunk_size 4096;

        application live {
                live on;
                record off;
                interleave off;
                wait_key off;
                meta on;
                wait_video off;
                idle_streams off;
                sync 100ms;
                gop_cache on;
                #session_relay on;
                #allow publish 127.0.0.1;
                #allow publish 192.168.2.0/24;
                allow publish all;
                #deny publish all;
                allow play all;
        }
        }
}