6257rv7 发表于 2024-8-30 22:45:41

腾讯视频分析优化指点书V2.0(1)


    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;"><span style="color: black;">1 背景</span></span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">随着网络带宽的<span style="color: black;">加强</span>，及各大运营商流量优惠政策，视频流量日益<span style="color: black;">明显</span>，客户对视频类业务的网络体验<span style="color: black;">亦</span>越来越<span style="color: black;">注重</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频<span style="color: black;">做为</span>当下用户数最多的APP之一，有着越来越多的群众<span style="color: black;">基本</span>，依据某些省份各个视频源的统计，腾讯视频业务量遥遥领先。<span style="color: black;">因此呢</span>视频的感知优化<span style="color: black;">提高</span>，<span style="color: black;">针对</span><span style="color: black;">提高</span>运营商和<span style="color: black;">机构</span>口碑<span style="color: black;">拥有</span>越来越大的<span style="color: black;">道理</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">本文基于基于现有话统、MR数、腾讯视频卡顿<span style="color: black;">名单</span>，对腾讯视频卡顿进行系统化的<span style="color: black;">相关</span>分析，并形成一套优化<span style="color: black;">办法</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;"><span style="color: black;">2 腾讯视频卡顿统计规则</span></span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频的通报存在省份/地市整体卡顿率及基站级卡顿率通报两种指标。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">省份/地市整体卡顿率考核<span style="color: black;">办法</span>为：</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">省（地市）卡顿评分 = X省（地市）卡顿率/全国平均卡顿率*0.8+全国基站平均播放次数/X省（地市）基站平均播放次数*0.2</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">严重卡顿基站的考核<span style="color: black;">办法</span>为：</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">该基站下<span style="color: black;">运用</span>腾讯视频APP<span style="color: black;">1星期</span>播放次数&gt;=70次且周平均卡顿率&gt;=5%且播放卡顿用户数&gt;=5，即视为严重卡顿基站</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">严重卡顿基站占比=严重卡顿小区数/腾讯视频APP<span style="color: black;">这次</span><span style="color: black;">供给</span>的产生响应业务的基站数</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">视频卡顿的定义为：</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">播放时加载时间&gt;200ms，画面不动了就认为是卡顿；一部视频有一次卡顿即视为卡顿视频。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">待交流确认遗留问题：</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（1） <span style="color: black;">意见</span>考核单位时间卡顿频次。否则长视频卡顿的概率越高，短视频卡顿的概率越小，卡顿指标考核存在不确定性。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（2） <span style="color: black;">宣传</span><span style="color: black;">周期</span>卡顿算不算卡顿？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（3） 从抓包上看，<span style="color: black;">经过</span>腾讯APP观看视频时，给指定的直接是ip，这个ip<span style="color: black;">是不是</span>存在<span style="color: black;">根据</span>用户的位置信息指定，即北京用户到上海，<span style="color: black;">倘若</span>该用户在北京则<span style="color: black;">拜访</span>北京的服务器，在上海则<span style="color: black;">拜访</span>上海的服务器。<span style="color: black;">倘若</span>是<span style="color: black;">根据</span>用户ip<span style="color: black;">位置</span>指定服务器，<span style="color: black;">那样</span><span style="color: black;">是不是</span>存在ip<span style="color: black;">位置</span>库刷新不<span style="color: black;">即时</span>，<span style="color: black;">引起</span>某省份的用户指向另一个省份的服务器？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（4） 腾讯服务器<span style="color: black;">是不是</span>会针对VIP和非VIP用户做差异化<span style="color: black;">保证</span>，即vip用户服务器在发送数据的时候，会更快？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（5） 腾讯APP<span style="color: black;">起始</span>播放的缓冲数据量<span style="color: black;">或</span>缓冲时长怎么样的，即终端缓存满足什么样的<span style="color: black;">要求</span>终端即<span style="color: black;">起始</span>播放？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（6） 腾讯视频<span style="color: black;">是不是</span><span style="color: black;">能够</span><span style="color: black;">供给</span><span style="color: black;">每一个</span>小区播放<span style="color: black;">区别</span>分辨率视频的次数及其播放时长？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">（7） 腾讯APP<span style="color: black;">是不是</span>存在后台自动下载缓冲视频的机制，即客户并未点播某个视频源，<span style="color: black;">然则</span>后台自动下载缓冲该视频，以备快速播放，<span style="color: black;">倘若</span>有，这种机制下，<span style="color: black;">是不是</span>判断卡顿？</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;"><span style="color: black;">3 腾讯视频特征</span></span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.1 视频卡顿的<span style="color: black;">要求</span></span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">视频卡顿的<span style="color: black;">要求</span>是后台下载的数据量<span style="color: black;">少于</span>等于终端播放视频所消耗的数据量。</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-axegupay5k/e41789f7b13e434ea9c1b97a0c703ca1~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=gMiu4zq4TuLTyf%2Ba0k%2FX%2BvMhX00%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/8d2e59a48a5a44d0ac6c1a6bad25db0f~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=0NvyOrh2FPEC7%2FbpbshABK%2Bf2Z0%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.2 腾讯视频流程</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.2.1 腾讯视频APP流程</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频APP流程是，<span style="color: black;">首要</span>登陆视频网站主页，<span style="color: black;">而后</span><span style="color: black;">选取</span>需要播放的视频对象，<span style="color: black;">而后</span><span style="color: black;">起始</span>播放页面的<span style="color: black;">表示</span>，<span style="color: black;">同期</span>进入初始缓冲过程（非VIP用户会进行<span style="color: black;">宣传</span>播放），最后<span style="color: black;">起始</span>播放视频。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">在视频网站主页面和播放页面的响应和<span style="color: black;">表示</span><span style="color: black;">周期</span>，该过程与普通的Web浏览业务相同，相应的业务归属于Web浏览，腾讯视频考核是以传输视频数据的TCP流<span style="color: black;">创立</span><span style="color: black;">做为</span><span style="color: black;">初始</span>标志，并在后续的观看过程中考核<span style="color: black;">是不是</span>卡顿。如下图所示：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/19f772ff6af7463db97cce905ce301d9~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=4UNBfYARyFLx4c5m%2BMbK4AoHRlg%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/268fd6f915cc45e0a39c7150dcdfe3b4~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=GQ5zVQUpaiXuDccJu%2FiJ5kFjrwk%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.2.2 腾讯视频播放</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频APP打开<span style="color: black;">周期</span><span style="color: black;">不消</span>于考核，<span style="color: black;">因此呢</span><span style="color: black;">这儿</span>不做<span style="color: black;">太多</span>介绍。<span style="color: black;">这儿</span>介绍腾讯视频APP在播放视频时的<span style="color: black;">重点</span><span style="color: black;">行径</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频在播放时，采用分片下载的<span style="color: black;">行径</span>（<span style="color: black;">少许</span>短视频会一次性下载完成），即将<span style="color: black;">全部</span>视频分割成短小的小片段，下载时以这些小片段为单位进行下载。表<span style="color: black;">此刻</span>后台抓包时，<span style="color: black;">便是</span><span style="color: black;">每一个</span>小片段发送一个get请求，进行视频资源的下载。如下图所示：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/36d27f0a0a8945dbbd0791869a512be5~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=EcKHjvjeGHWqfr0s6i0vKBEh4ok%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/99ad4d52a36d487094420c99272c4261~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=NQWejWgMvFpzHQG9a4eIwAN2v7A%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">在腾讯视频的<span style="color: black;">实质</span>抓包中，并未找到M3U8文件，可能是进行了加密传输，<span style="color: black;">亦</span>可能是采用了新的传输协议，<span style="color: black;">仅有</span>腾讯视频播放器能够识别。M3U8文件<span style="color: black;">指的是</span>播放器为终端<span style="color: black;">供给</span>的视频源<span style="color: black;">每一个</span>分片的信息（<span style="color: black;">例如</span>，视频分片的播放时长，视频分片的<span style="color: black;">体积</span>，下载<span style="color: black;">位置</span>等）。在终端的get信息中，<span style="color: black;">能够</span>看大<span style="color: black;">每一个</span>分片的播放时长、数据量等信息，如下：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/60db2ef2b3994effaec09081d2479570~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=Cl0016JwSMUWz6WFSep8%2Fa%2Fh6ok%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/cd0f1c503c854ed3b17beeb8920a2dba~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=M7q0Vl0ctAkOffaDGX9q1nzYJQ4%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.3 腾讯视频业务特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">非漫游用户手机观看腾讯视频电视剧，抓取手机报文，终端播放60s<span style="color: black;">宣传</span>后，<span style="color: black;">起始</span>进行视频播放.播放过程中无卡顿。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">观察手机播放视频时的业务特征，如下图所示：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/f708f2c239f14b1a9260259899561d43~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=Jj9G8JdX2NTPdB266EqFdrWO3%2BQ%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/2f7144ec33cb426ca27c869914048bd7~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=AONyJYrQhaGHv44M96POSbEQmNY%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">从图中<span style="color: black;">能够</span>看到终端初始下载12个片段，从终端请求的数据中<span style="color: black;">能够</span>看到<span style="color: black;">每一个</span>片段长度为12s。<span style="color: black;">因此呢</span><span style="color: black;">能够</span><span style="color: black;">显示</span>终端是初始缓存12个片段，随后每播放3个片段，下载3个片段。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">腾讯视频APP在<span style="color: black;">拜访</span>大部分视频的时候满足该规律，即初始下载12个片段，随后每播放3个片段，下载3个片段。</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/92d1d9ed35fd473dbf0b8fe3b4a25bfd~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=%2Bmbbazr9SO0yHDSqsF60DDguq%2Bg%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">这是在网络速率远远高于视频码率的时候，存在该特征。当网络的速率和视频的码率差不多时，则会看到终端<span style="color: black;">始终</span>在后台下载视频数据，此时视频是最容易卡的，下图是某卡顿视频的下载图，从图中<span style="color: black;">能够</span>看到终端<span style="color: black;">始终</span>在进行数据下载。</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/999790baf4e846d0873a54849d86f8de~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=amiNg%2F74%2FHKfY2J9HOeBZotpBAY%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/0f752d52a487499880a5a02d41a02986~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=Vcv2W4qw6aQ61daXVJFUdWJ5trY%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.4 漫游用户业务特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">xx默认策略，漫游用户数据需回到开户地PGW，<span style="color: black;">而后</span>再出口进行互联网业务，<span style="color: black;">因此呢</span>会<span style="color: black;">引起</span>漫游用户其<span style="color: black;">拜访</span>视频路径和非漫游用户<span style="color: black;">区别</span>。用xx卡进行腾讯视频APP拨测，终端被分配的DNS服务器的<span style="color: black;">位置</span>为58.240.57.33（xxDNS）。</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/cd0e89e1b0af4d2db1cb6bf29a5bec44~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=HoY32z0QlGt7AtJDl%2Fls0Q0KSYI%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;"><span style="color: black;">由于</span>漫游用户和非漫游用户被配置的DNS服务器<span style="color: black;">位置</span><span style="color: black;">区别</span>，<span style="color: black;">那样</span><span style="color: black;">能够</span>判断漫游用户和非漫游用户在<span style="color: black;">拜访</span>相同的视频时，DNS服务器答复的ip<span style="color: black;">位置</span>时<span style="color: black;">区别</span>的，即漫游用户和非漫游用户<span style="color: black;">拜访</span>的视频服务器<span style="color: black;">区别</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.5 VIP用户业务特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">VIP用户可<span style="color: black;">以避免</span><span style="color: black;">宣传</span>，<span style="color: black;">同期</span><span style="color: black;">能够</span>观看1080P视频和杜比音效视频，<span style="color: black;">因此呢</span>VIP用户可能更卡顿。观察VIP用户在<span style="color: black;">拜访</span>视频时的业务特征，如下图所示：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/5b01d8ef26a0468eaf6d4a02f9cd522c~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=bmYh7m7X63cNalZQ2kWWM%2BvZJB0%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p26-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/2b6c698fd01b4a7a87cda561d1b63922~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=vm1T2UM%2B1wsvqnPBfUmOnBrW%2FR8%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">从图中<span style="color: black;">能够</span>看到VIP用户和非VIP用户在视频业务特征是并<span style="color: black;">无</span>大的<span style="color: black;">区别</span>，<span style="color: black;">一样</span>是初始下载12个分片，<span style="color: black;">每一个</span>分片12s，随后每播放3个分片，下载3个分片。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.6 前台播放和后台缓冲之间的业务特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.6.1 VIP用户的播放特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">Vip用户无<span style="color: black;">宣传</span>，在播放时缓冲一段时间即<span style="color: black;">起始</span>播放，为了弄清vip用户<span style="color: black;">是不是</span>是等到12个分片下载完，才<span style="color: black;">起始</span>播放，需要对前台播放和后台缓冲之间的关系进行测试，测试结果如下：</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/66ff37c495694aaa96d9f572b08161e2~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=Kx4HzFsIS5jJ3bwL6IjXYo3QZFY%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">VIP用户观察720P视频，点击<span style="color: black;">起始</span>按钮后，隔3.62s<span style="color: black;">起始</span>播放，<span style="color: black;">然则</span>后台下载12个分片用了12.1s的时间，<span style="color: black;">因此呢</span><span style="color: black;">能够</span><span style="color: black;">显示</span>腾讯视频并不是等到12个分片<span style="color: black;">所有</span>下载完后才<span style="color: black;">起始</span>播放，下载一部分后即<span style="color: black;">起始</span>播放。</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/18a9175961084e88a00f940478e82589~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=G%2FcUYMzvFwjrQ8ZwvdoT27uY%2BMA%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.6.2 非vip用户的播放特征</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">非VIP用户在播放的时候要播放<span style="color: black;">宣传</span>，<span style="color: black;">宣传</span>结束后<span style="color: black;">起始</span>播放视频，观察非VIP用户后台<span style="color: black;">起始</span>缓冲的时间，<span style="color: black;">实质</span>测试如下，从图中<span style="color: black;">能够</span>看到</span></span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/1e04cee2e9c1433480ab0d501c5e9889~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=wvtWFEVcry5PZLAt%2FTTmI2pHWGM%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/7e73386e13ea4d1b8938e4749ac84342~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1725616048&amp;x-signature=BFZqqTBdPixlWmjZ7TyoJhXzixU%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">3.7 腾讯视频业务特征分析结果汇总</span></strong></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">Ø 在网络带宽充足时，腾讯视频初始下载12个分片，<span style="color: black;">每一个</span>分片12s，而后每播放3个分片，下载3个分片。在网络带宽不足时，表现为后台<span style="color: black;">始终</span>在进行下载，而前台播放。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">Ø 漫游用户<span style="color: black;">重点</span><span style="color: black;">拜访</span>归属地的服务器，<span style="color: black;">因此呢</span>漫游用户的卡顿<span style="color: black;">状况</span>可能和非漫游用户的卡顿<span style="color: black;">状况</span><span style="color: black;">区别</span>。</span></span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">Ø VIP用户<span style="color: black;">由于</span>免<span style="color: black;">宣传</span>，相较于非VIP用户在<span style="color: black;">宣传</span>时间即<span style="color: black;">起始</span>缓冲视频，其缓冲时间较短，<span style="color: black;">因此呢</span>更易产生卡顿。</span></span></p>




b1gc8v 发表于 2024-10-2 06:43:59

你的话语如春风拂面，温暖了我的心房，真的很感谢。

nykek5i 发表于 2024-10-3 17:47:44

谷歌网站排名优化 http://www.fok120.com/

7wu1wm0 发表于 2024-10-27 11:48:53

一看到楼主的气势，我就觉得楼主同在社区里灌水。
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