jquery怎么获取video标签的src，然后改变它？

Question

比如：
<video controls="controls" poster="/flash/c.jpg" preload="none" src="/flash/a9.mp4 ></video>
我现在想把src的网址改为www.a.com/flash/a9.mp4,
flash/a9.mp4这个地址不是固定的。
我是先获取地址var dizhi = $("video").attr("src");想把这个变量和www.a.com再组合添加到地址上，不知道怎么操作。

已找到方法，如下：

var dizhi = $("video").attr("src");
   $("video").attr("src","http://www.a.com" + dizhi);
var slt = $("video").attr("poster");
   $("video").attr("poster","http://www.a.com" + slt);

Answer 1

给video加id

<video id = "v1" controls="controls" poster="/flash/c.jpg" preload="none" src="/flash/a9.mp4" ></video>
<video id = "v2" controls="controls" poster="/flash/c.jpg" preload="none" src="/flash/a9.mp4" ></video>

var dizhi = $("#v1").attr("src");
   $("#v1").attr("src","http://www.a.com" + dizhi);
var slt = $("#v1").attr("poster");
   $("#v1").attr("poster","http://www.a.com" + slt);

这样v1的src改变不会影响v2
如果是给每个视频加前缀 建议循环

---

猜测你的意思是

    <video
      controls="controls"
      poster="/flash/c.jpg"
      preload="none"
      src="/flash/a1.mp4"
      id="v1"
    ></video>
    <video
      controls="controls"
      poster="/flash/c.jpg"
      preload="none"
      src="/flash/a2.mp4"
    ></video>
    <video
      controls="controls"
      poster="/flash/c.jpg"
      preload="none"
      src="/flash/a3.mp4"
    ></video>

  <script>
    $("video").each(function() {
      $(this).attr("src", "http://www.a.com" + $(this).attr("src"));
    });
  </script>

这样可以为每个video的src添加前缀
demo

Answer 2

这样会有个问题，一个页面有多个video的时候，会导致全部的video src应用一个地址，这个问题该怎么避免？
$(".nrcss video").each(function(){
$(this).attr('id',"video"+$(this).index());
})
$(".nrcss img").each(function(){
$(this).attr('id',"img"+$(this).index());
})

var dizhi = $("#video0").attr("src");
   $("#video0").attr("src","https://www.dmluqiao.com" + dizhi);
   var dizhi1 = $("#video1").attr("src");
   $("#video1").attr("src","https://www.dmluqiao.com" + dizhi1);
   var dizhi2 = $("#video2").attr("src");
   $("#video2").attr("src","https://www.dmluqiao.com" + dizhi2);
   var dizhi3 = $("#video3").attr("src");
   $("#video3").attr("src","https://www.dmluqiao.com" + dizhi3);
var tupian = $("#img0").attr("src");
   $("#img0").attr("src","https://www.dmluqiao.com" + tupian);
   var tupian1 = $("#img1").attr("src");
   $("#img1").attr("src","https://www.dmluqiao.com" + tupian1);
   var tupian2 = $("#img2").attr("src");
   $("#img2").attr("src","https://www.dmluqiao.com" + tupian2);
   var tupian3 = $("#img3").attr("src");
   $("#img3").attr("src","https://www.dmluqiao.com" + tupian3);
   var tupian4 = $("#img4").attr("src");
   $("#img4").attr("src","https://www.dmluqiao.com" + tupian4);
   var tupian5 = $("#img5").attr("src");
   $("#img5").attr("src","https://www.dmluqiao.com" + tupian5);
   var tupian6 = $("#img6").attr("src");
   $("#img6").attr("src","https://www.dmluqiao.com" + tupian6);
   var tupian7 = $("#img7").attr("src");
   $("#img7").attr("src","https://www.dmluqiao.com" + tupian7);
   var tupian8 = $("#img8").attr("src");
   $("#img8").attr("src","https://www.dmluqiao.com" + tupian8);
   var tupian9 = $("#img9").attr("src");
   $("#img9").attr("src","https://www.dmluqiao.com" + tupian9);
   var tupian10 = $("#img10").attr("src");
   $("#img10").attr("src","https://www.dmluqiao.com" + tupian10);
   var tupian11 = $("#img11").attr("src");
   这种笨方法也不好用