ent.getElementById('play');
    var $pause = document.getElementById('pause');
    var $playHref = document.getElementById('playUrl');
    var $container = document.getElementById('container');
    var $destroy = document.getElementById('destroy');
    var $fps = document.querySelector('.fps-inner');


    var showOperateBtns = true; // 是否显示按钮
    var forceNoOffscreen = true; //
    var jessibuca = null;

    function checkSupport() {
        return window.MediaSource && window.Medi