如何为HTML5视频播放器创建偏移插件

Question

我试图创建一个偏移插件来播放HTML5视频播放器中完整视频的一部分视频，有一个可用于video.js videojs-offset插件的插件 ，现在正试图将该插件转换为仅可与HTML5播放器一起使用

videojs偏移插件的来源

(function() {
    "use strict";
    var a = function(a) {
        var b;
        return this._offsetStart = a.start || 0, this._offsetEnd = a.end || 0, b = this.constructor, b.__super__ && b.__super__.__offsetInit || (b.__super__ = {
            __offsetInit: !0,
            duration: b.prototype.duration,
            currentTime: b.prototype.currentTime,
            bufferedPercent: b.prototype.bufferedPercent,
            remainingTime: b.prototype.remainingTime
        }, b.prototype.duration = function() {
            return this._offsetEnd > 0 ? this._offsetEnd - this._offsetStart : b.__super__.duration.apply(this, arguments) - this._offsetStart
        }, b.prototype.currentTime = function(a) {
            return void 0 !== a ? b.__super__.currentTime.call(this, a + this._offsetStart) - this._offsetStart : b.__super__.currentTime.apply(this, arguments) - this._offsetStart
        }, b.prototype.remainingTime = function() {
            var a = this.currentTime();
            return a < this._offsetStart && (a = 0), this.duration() - a
        }, b.prototype.startOffset = function() {
            return this._offsetStart
        }, b.prototype.endOffset = function() {
            return this._offsetEnd > 0 ? this._offsetEnd : this.duration()
        }), this.on("timeupdate", function() {
            var a = this.currentTime();
            0 > a && (this.currentTime(0), this.play()), this._offsetEnd > 0 && a > this._offsetEnd - this._offsetStart && (this.currentTime(this._offsetEnd - this._offsetStart), this.pause())
        }), this
    };
    a.VERSION = "0.0.0", window.vjsoffset = a, window.videojs.plugin("offset", a)
}).call(this);

我需要怎样尝试才能单独与HTML5视频播放器一起使用？

Answer 1

这似乎可以用最少的代码轻松完成。 我建议写这样的东西：

 function videoSegment(elementOrQuery, start, stop){ var element = typeof elementOrQuery === 'string' ? document.querySelector(elementOrQuery) : elementOrQuery; element.currentTime = start; // While playing, check if time is within bounds element.addEventListener('timeupdate', function(){ if(element.currentTime < start) element.currentTime = start; if(element.currentTime > stop) element.pause(); }); // When starting to play make sure its within bounds element.addEventListener('play', function(){ if(element.duration > stop || element.duration < start) element.currentTime = start; }); // When pausing, check if theres a loop and repeat or reset to beginning element.addEventListener('pause', function(){ if(element.currentTime > stop) element.currentTime = start; if(element.loop) element.play(); }); } videoSegment('video', 2, 4); 

 <video controls autoplay loop> <source src="http://techslides.com/demos/sample-videos/small.mp4" /> </video>