2016-05-22 119 views
1

我想制作一个简单的网页,在线流媒体广播背景音乐或脱口秀在后台播放。我跟着在这里介绍的方法:https://productforums.google.com/forum/#!msg/chrome/hgxRgmT0INY/KR-CGxqdlN4J用JavaScript将追加对象添加到DOM的背景音乐

它可以在Chrome浏览器:

<html> 
<head> 

<script language=javascript> 

function setupSound() 
{ 
    var obj = document.createElement("object"); 
    obj.width="0px"; 
    obj.height="0px"; 
    obj.type = "audio/mp3"; 
    obj.data = "http://mr-stream.mediaconnect.hu/4736/mr1.mp3"; 
    obj.setAttribute("id", "bgsound1"); 
    var paramobj=obj.appendChild(document.createElement('param')); 
    paramobj.name="loop"; 
    paramobj.value="-1"; 
    var body = document.getElementsByTagName("body")[0]; 
    body.appendChild(obj); 
    document.getElementsByName("button1")[0].onclick=function(){change_channel()};       
} 

function change_channel() 
{ 
var channels=[ 
["Music: MR1-Kossuth","http://mr-stream.mediaconnect.hu/4736/mr1.mp3"], 
["Music: none",""], 
["Music: MKR","http://katolikusradio.hu:9000/live_hi.mp3"], 
["Music: Karc FM","http://hosting.42netmedia.com:13100/;stream#.mp3"], 
] 

var channel_hash={}; 
var nextindex=0; 
for (var i=0;i<=channels.length-1;i++) { 
    nextindex=(i+1) % channels.length; 
    channel_hash[channels[i][0]]=[channels[nextindex][0],channels[nextindex][1]]; 
} 

document.getElementById("bgsound1").data=channel_hash[f2.button1.value][1] 
f2.button1.value=channel_hash[f2.button1.value][0] 

} 


</script> 
</head> 

<body onload="setupSound()"> 

<center> 
    <form name='f2'> 
     <input type=button name='button1' value='Music: MR1-Kossuth'> 
    </form> 
</center> 

</body> 
</html> 

我做这个的jsfiddle,但它并没有发挥渠道,根本没有声音: https://jsfiddle.net/gxeqsnL3/1/ 我觉得声音由于iframe,对象没有正确地连接到DOM。 但是,该代码适用于谷歌浏览器,背景音乐可以很好地播放流媒体广播频道。

我的主要问题是:当我想切换到哪个URL包含分号的频道时,我从浏览器中获得一个下载文档。然而,分号确实是需要的,因为如果没有它,即使在HTML5音频播放器中,ShoutCast广播流也不能正常播放。

回答

0

我改变了一下你的代码。 这是一样的行为,但不是创建一个<object> HTML元素,而是在JavaScript中创建一个new Audio对象,而不会混淆HTML标记。

var audio = new Audio(); 
 
document.getElementsByName("button1")[0].onclick = change_channel; 
 

 
function change_channel() { 
 
    var nextindex = 0; 
 
    var channels = [ 
 
    ["Music: MKR", "http://katolikusradio.hu:9000/live_hi.mp3"], 
 
    ["Music: MR1-Kossuth", "http://mr-stream.mediaconnect.hu/4736/mr1.mp3"], 
 
    ["Music: none", ""], 
 
    ["Music: Karc FM", "http://hosting.42netmedia.com:13100/\;stream#.mp3"] 
 
    ]; 
 
    var channel_hash = {}; 
 

 
    for (var i = 0; i <= channels.length - 1; i++) { 
 
    nextindex = (i + 1) % channels.length; 
 
    channel_hash[channels[i][0]] = [channels[nextindex][0], channels[nextindex][1]]; 
 
    } 
 

 
    playSound(channel_hash[f2.button1.value][1]); 
 
    f2.button1.value = channel_hash[f2.button1.value][0]; 
 
} 
 

 
function playSound(file) { 
 
    if (file === "") { 
 
    console.log("Now playing: none"); 
 
    audio.pause(); 
 
    } else { 
 
    console.log("Now playing: " + file); 
 
    audio.pause(); 
 
    audio = new Audio(file); 
 
    audio.play(); 
 
    } 
 
}
<center> 
 
    <form name='f2'> 
 
    <input type=button name='button1' value='Music: none'> 
 
    </form> 
 
</center>

的jsfiddle
https://jsfiddle.net/_jserodio/stag9p3r

+0

有趣的是,没有任何声音我。我可以通过点击按钮来更换频道,但声音无法播放。我尝试了3个浏览器。我正在使用Arch Linux,XFCE。该版本包含带分号的URL:http://jsfiddle.net/gxeqsnL3/19/ – Konstantin

+0

我构建了相同的行为,但不是创建'' HTML元素,而是使用JavaScript中的Audio对象。检查这个http://jsfiddle.net/_jserodio/stag9p3r/,让我知道它是否适合你。它为我工作。 –

+0

Thx,这真的有用。 – Konstantin

0

嘿,我做了一些新的代码,你可以帮助你理解!

HTML

<input type="button" id="music_button" onclick="change_music()" value="No music"> 
<audio controls style="display:none" id="music" src=""> 
</audio> 

的Javascript

var channels = [ 
    ["Music: MKR", "http://katolikusradio.hu:9000/live_hi.mp3"], 
    ["Music: MR1-Kossuth", "http://mr-stream.mediaconnect.hu/4736/mr1.mp3"], 
    ["Music: Karc FM", "http://hosting.42netmedia.com:13100/\;stream#.mp3"] 
    ]; 
var current_channel = 0; 

function change_music() { 
var button = document.getElementById("music_button") 
var music = document.getElementById("music") 
if(current_channel > 2) { 
current_channel = 0; 
button.value="No Music" 
music.src = ""; 
music.load() 
music.play() 
} 
else { 
button.value = channels[current_channel][0] 
music.src = channels[current_channel][1] 
music.load() 
music.play() 
current_channel++ 
} 

}