 $videoBufferDelay = document.getElementById('videoBufferDelay');
    var $replay = document.getElementById('replay');
    var $fps = document.querySelector('.fps-inner');
    var $renderDom = document.getElementById('renderDom');
    var $isUseWebGPU = document.getElementById('isUseWebGPU');

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

    function isMobile() {
        return (/iphone|ipad|android.*mobile|windows.*phone|bla