使用PHP从音频流中提取音轨信息

vaj7vani  于 2023-10-15  发布在  PHP
关注(0)|答案(5)|浏览(90)

是否可以使用PHP从音频流中提取音轨信息?我已经做了一些挖掘,我能找到的最接近的函数是stream_get_transmits,但我的主机不支持通过fsockopen()进行http传输,所以我必须做更多的修改,看看该函数还返回什么。
目前,我正试图拉艺术家和跟踪元数据从美国在线流。

rsl1atfo

rsl1atfo1#

这是一个SHOUTcast流,是的,这是可能的。它与ID 3标签无关。我写了一个脚本前一段时间这样做,但不能找到它了。就在上周,我帮助了另一个家伙,他有一个相当完整的脚本来做同样的事情,但我不能把源代码贴到它上面,因为它不是我的。不过,我会让你与他联系,如果你给我发电子邮件在email protected(http://mailto:brad@musatcha.com)。

无论如何,以下是如何自己做的:

你需要做的第一件事是直接连接到服务器。不要使用HTTP。好吧,你可能会使用cURL,但它可能会比它的价值更麻烦。您可以使用fsockopen()doc)连接到它。确保使用正确的端口。另外请注意,许多Web主机会阻止很多端口,但您通常可以使用端口80。幸运的是,所有AOL托管的SHOUTcast流都使用端口80。
现在,像你的客户那样提出你的要求。
GET /whatever HTTP/1.0
但是,在发送<CrLf><CrLf>之前,包括下一个头!
Icy-MetaData:1
这告诉服务器您需要元数据。现在,发送您的一对<CrLf>
好的,服务器会响应一堆头,然后开始向你发送数据。在这些标题中将是icy-metaint:8192或类似的。8192是Meta区间。这很重要,也是你唯一需要的价值。它通常是8192,但并不总是,所以请确保实际读取此值!
基本上这意味着,你将得到8192字节的MP3数据,然后是一大块Meta,然后是8192字节的MP3数据,然后是一大块元数据。
读取8192个字节的数据(确保您没有在此计数中包括头),丢弃它们,然后读取下一个字节。该字节是Meta数据的第一个字节,并指示元数据的长度。取此字节的值(实际字节为ord()doc)),然后乘以16。结果是要为元数据读取的字节数。将这些字节数读入一个字符串变量,以便您使用。
接下来,修剪这个变量的值。为什么呢?因为字符串在末尾填充了0x0(使其均匀地适合16字节的倍数),trim()doc)为我们处理了这一点。
你会得到这样的东西:
StreamTitle='Awesome Trance Mix - DI.fm';StreamUrl=''
我会让你选择你的方法来解析它。就我个人而言,我可能只是在;上限制为2,但要小心包含;的标题。我不知道转义字符方法是什么。一个小实验可以帮助你。
不要忘记断开与服务器的连接,当你完成它!
有很多SHOUTcast元数据参考。这是一个很好的例子:https://web.archive.org/web/20191121035806/http://www.smackfu.com/stuff/programming/shoutcast.html

v64noz0r

v64noz0r2#

看看这个:https://gist.github.com/fracasula/5781710
这是一个PHP函数的小要点,它允许您从流URL中提取MP3元数据(StreamTitle)。
通常,流媒体服务器会在响应中放置一个icy-metaint头,告诉我们流中元数据的发送频率。该函数检查响应头,如果存在,则用它替换interval参数。
否则,该函数将根据您的时间间隔调用流URL,如果没有任何元数据,则它将从偏移量参数开始通过递归再次尝试。

<?php

/**
 * Please be aware. This gist requires at least PHP 5.4 to run correctly.
 * Otherwise consider downgrading the $opts array code to the classic "array" syntax.
 */
function getMp3StreamTitle($streamingUrl, $interval, $offset = 0, $headers = true)
{
    $needle = 'StreamTitle=';
    $ua = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36';

    $opts = [
            'http' => [
            'method' => 'GET',
            'header' => 'Icy-MetaData: 1',
            'user_agent' => $ua
        ]
    ];

    if (($headers = get_headers($streamingUrl))) {
        foreach ($headers as $h) {
            if (strpos(strtolower($h), 'icy-metaint') !== false && ($interval = explode(':', $h)[1])) {
                break;
            }
        }
    }

    $context = stream_context_create($opts);

    if ($stream = fopen($streamingUrl, 'r', false, $context)) {
        $buffer = stream_get_contents($stream, $interval, $offset);
        fclose($stream);

        if (strpos($buffer, $needle) !== false) {
            $title = explode($needle, $buffer)[1];
            return substr($title, 1, strpos($title, ';') - 2);
        } else {
            return getMp3StreamTitle($streamingUrl, $interval, $offset + $interval, false);
        }
    } else {
        throw new Exception("Unable to open stream [{$streamingUrl}]");
    }
}

var_dump(getMp3StreamTitle('http://str30.creacast.com/r101_thema6', 19200));

希望这对你有帮助!

lrpiutwd

lrpiutwd3#

非常感谢您提供的代码fra_casula。这里是一个稍微简化的版本,运行在PHP <= 5.3上(原始版本的目标是5.4)。它还重用相同的连接资源。
我因为自己的需要而删除了异常,如果没有找到任何东西,则返回false。

private function getMp3StreamTitle($steam_url)
    {
        $result = false;
        $icy_metaint = -1;
        $needle = 'StreamTitle=';
        $ua = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36';

        $opts = array(
            'http' => array(
                'method' => 'GET',
                'header' => 'Icy-MetaData: 1',
                'user_agent' => $ua
            )
        );

        $default = stream_context_set_default($opts);

        $stream = fopen($steam_url, 'r');

        if($stream && ($meta_data = stream_get_meta_data($stream)) && isset($meta_data['wrapper_data'])){
            foreach ($meta_data['wrapper_data'] as $header){
                if (strpos(strtolower($header), 'icy-metaint') !== false){
                    $tmp = explode(":", $header);
                    $icy_metaint = trim($tmp[1]);
                    break;
                }
            }
        }

        if($icy_metaint != -1)
        {
            $buffer = stream_get_contents($stream, 300, $icy_metaint);

            if(strpos($buffer, $needle) !== false)
            {
                $title = explode($needle, $buffer);
                $title = trim($title[1]);
                $result = substr($title, 1, strpos($title, ';') - 2);
            }
        }

        if($stream)
            fclose($stream);                

        return $result;
    }
63lcw9qa

63lcw9qa4#

这是使用HttpClient获取元数据的C#代码:

public async Task<string> GetMetaDataFromIceCastStream(string url)
    {
        m_httpClient.DefaultRequestHeaders.Add("Icy-MetaData", "1");
        var response = await m_httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
        m_httpClient.DefaultRequestHeaders.Remove("Icy-MetaData");
        if (response.IsSuccessStatusCode)
        {
            IEnumerable<string> headerValues;
            if (response.Headers.TryGetValues("icy-metaint", out headerValues))
            {
                string metaIntString = headerValues.First();
                if (!string.IsNullOrEmpty(metaIntString))
                {
                    int metadataInterval = int.Parse(metaIntString);
                    byte[] buffer = new byte[metadataInterval];
                    using (var stream = await response.Content.ReadAsStreamAsync())
                    {
                        int numBytesRead = 0;
                        int numBytesToRead = metadataInterval;
                        do
                        {
                            int n = stream.Read(buffer, numBytesRead, 10);
                            numBytesRead += n;
                            numBytesToRead -= n;
                        } while (numBytesToRead > 0);

                        int lengthOfMetaData = stream.ReadByte();
                        int metaBytesToRead = lengthOfMetaData * 16;
                        byte[] metadataBytes = new byte[metaBytesToRead];
                        var bytesRead = await stream.ReadAsync(metadataBytes, 0, metaBytesToRead);
                        var metaDataString = System.Text.Encoding.UTF8.GetString(metadataBytes);
                        return metaDataString;
                    }
                }
            }
        }

        return null;
    }
kyxcudwk

kyxcudwk5#

更新:这是一个更新,有一个更合适的解决方案的问题。原文也在下面提供,以供参考。
这篇文章中的脚本,经过一些错误更正,工作并使用PHP提取流标题:PHP script to extract artist & title from Shoutcast/Icecast stream
我不得不做一些修改,因为最后的echo语句抛出了一个错误。我在函数后添加了两个print_r()语句,并在调用中添加了$argv[1],这样您就可以从命令行向它传递URL。

<?php
define('CRLF', "\r\n");

class streaminfo{
public $valid = false;
public $useragent = 'Winamp 2.81';

protected $headers = array();
protected $metadata = array();

public function __construct($location){
    $errno = $errstr = '';
    $t = parse_url($location);
    $sock = fsockopen($t['host'], $t['port'], $errno, $errstr, 5);
    $path = isset($t['path'])?$t['path']:'/';
    if ($sock){
        $request = 'GET '.$path.' HTTP/1.0' . CRLF . 
            'Host: ' . $t['host'] . CRLF . 
            'Connection: Close' . CRLF . 
            'User-Agent: ' . $this->useragent . CRLF . 
            'Accept: */*' . CRLF . 
            'icy-metadata: 1'.CRLF.
            'icy-prebuffer: 65536'.CRLF.
            (isset($t['user'])?'Authorization: Basic '.base64_encode($t['user'].':'.$t['pass']).CRLF:'').
            'X-TipOfTheDay: Winamp "Classic" rulez all of them.' . CRLF . CRLF;
        if (fwrite($sock, $request)){
            $theaders = $line = '';
            while (!feof($sock)){ 
                $line = fgets($sock, 4096); 
                if('' == trim($line)){
                    break;
                }
                $theaders .= $line;
            }
            $theaders = explode(CRLF, $theaders);
            foreach ($theaders as $header){
                $t = explode(':', $header); 
                if (isset($t[0]) && trim($t[0]) != ''){
                    $name = preg_replace('/[^a-z][^a-z0-9]*/i','', strtolower(trim($t[0])));
                    array_shift($t);
                    $value = trim(implode(':', $t));
                    if ($value != ''){
                        if (is_numeric($value)){
                            $this->headers[$name] = (int)$value;
                        }else{
                            $this->headers[$name] = $value;
                        }
                    }
                }
            }
            if (!isset($this->headers['icymetaint'])){
                $data = ''; $metainterval = 512;
                while(!feof($sock)){
                    $data .= fgetc($sock);
                    if (strlen($data) >= $metainterval) break;
                }
               $this->print_data($data);
                $matches = array();
                preg_match_all('/([\x00-\xff]{2})\x0\x0([a-z]+)=/i', $data, $matches, PREG_OFFSET_CAPTURE);
               preg_match_all('/([a-z]+)=([a-z0-9\(\)\[\]., ]+)/i', $data, $matches, PREG_SPLIT_NO_EMPTY);
               echo '<pre>';var_dump($matches);echo '</pre>';
                $title = $artist = '';
                foreach ($matches[0] as $nr => $values){
                  $offset = $values[1];
                  $length = ord($values[0]{0}) + 
                            (ord($values[0]{1}) * 256)+ 
                            (ord($values[0]{2}) * 256*256)+ 
                            (ord($values[0]{3}) * 256*256*256);
                  $info = substr($data, $offset + 4, $length);
                  $seperator = strpos($info, '=');
                  $this->metadata[substr($info, 0, $seperator)] = substr($info, $seperator + 1);
                    if (substr($info, 0, $seperator) == 'title') $title = substr($info, $seperator + 1);
                    if (substr($info, 0, $seperator) == 'artist') $artist = substr($info, $seperator + 1);
                }
                $this->metadata['streamtitle'] = $artist . ' - ' . $title;
            }else{
                $metainterval = $this->headers['icymetaint'];
                $intervals = 0;
                $metadata = '';
                while(1){
                    $data = '';
                    while(!feof($sock)){
                        $data .= fgetc($sock);
                        if (strlen($data) >= $metainterval) break;
                    }
                    //$this->print_data($data);
                    $len = join(unpack('c', fgetc($sock))) * 16;
                    if ($len > 0){
                        $metadata = str_replace("\0", '', fread($sock, $len));
                        break;
                    }else{
                        $intervals++;
                        if ($intervals > 100) break;
                    }
                }
                $metarr = explode(';', $metadata);
                foreach ($metarr as $meta){
                    $t = explode('=', $meta);
                    if (isset($t[0]) && trim($t[0]) != ''){
                        $name = preg_replace('/[^a-z][^a-z0-9]*/i','', strtolower(trim($t[0])));
                        array_shift($t);
                        $value = trim(implode('=', $t));
                        if (substr($value, 0, 1) == '"' || substr($value, 0, 1) == "'"){
                            $value = substr($value, 1);
                        }
                        if (substr($value, -1) == '"' || substr($value, -1) == "'"){
                            $value = substr($value, 0, -1);
                        }
                        if ($value != ''){
                            $this->metadata[$name] = $value;
                        }
                    }
                }
            }

            fclose($sock);
            $this->valid = true;
        }else echo 'unable to write.';
    }else echo 'no socket '.$errno.' - '.$errstr.'.';

print_r($theaders);
print_r($metadata);
}

public function print_data($data){
    $data = str_split($data);
    $c = 0;
    $string = '';
    echo "<pre>\n000000 ";
    foreach ($data as $char){
        $string .= addcslashes($char, "\n\r\0\t");
        $hex = dechex(join(unpack('C', $char)));
        if ($c % 4 == 0) echo ' ';
        if ($c % (4*4) == 0 && $c != 0){
          foreach (str_split($string) as $s){
            //echo " $string\n";
            if (ord($s) < 32 || ord($s) > 126){
              echo '\\'.ord($s);
            }else{
              echo $s;
            }
          }
          echo "\n";
          $string = '';
          echo str_pad($c, 6, '0', STR_PAD_LEFT).'  ';
        }
        if (strlen($hex) < 1) $hex = '00';
        if (strlen($hex) < 2) $hex = '0'.$hex;
          echo $hex.' ';
        $c++;
    }
    echo "  $string\n</pre>";
}

public function __get($name){
    if (isset($this->metadata[$name])){
        return $this->metadata[$name];
    }
    if (isset($this->headers[$name])){
        return $this->headers[$name];
    }
    return null;
 }
}

$t = new streaminfo($argv[1]); // get metadata

/*
echo "Meta Interval:  ".$t->icymetaint;
echo "\n";
echo 'Current Track:  '.$t->streamtitle;
*/
?>

使用更新的代码,它打印header和streamtitle信息的数组。如果你只想要now_playing的音轨,那么注解掉两个print_r()语句,并在结尾取消注解echo语句。

#Example: run this command:
php getstreamtitle.php http://162.244.80.118:3066

#and the result is...

Array
(
    [0] => HTTP/1.0 200 OK
    [1] => icy-notice1:<BR>This stream requires <a href="http://www.winamp.com">Winamp</a><BR>
    [2] => icy-notice2:SHOUTcast DNAS/posix(linux x64) v2.6.0.750<BR>
    [3] => Accept-Ranges:none
    [4] => Access-Control-Allow-Origin:*
    [5] => Cache-Control:no-cache,no-store,must-revalidate,max-age=0
    [6] => Connection:close
    [7] => icy-name:
    [8] => icy-genre:Old Time Radio
    [9] => icy-br:24
    [10] => icy-sr:22050
    [11] => icy-url:http://horror-theatre.com
    [12] => icy-pub:1
    [13] => content-type:audio/mpeg
    [14] => icy-metaint:8192
    [15] => X-Clacks-Overhead:GNU Terry Pratchett
    [16] => 
)
StreamTitle='501026TooHotToLive';
  • 这里是使用Python和VLC的原始帖子 *

PHP解决方案一直在搜索,但从未为我返回响应。
这不是PHP的要求,但可能会帮助其他人寻找一种方法来提取'now_playing'信息从直播流。
如果你只想要'now_playing'信息,你可以编辑脚本来返回它。
python脚本使用VLC提取元数据(包括“now_playing”曲目)。你需要VLC和Python库:sys、telnetlib、os、time和socket。

#!/usr/bin/python
# coding: utf-8
import sys, telnetlib, os, time, socket

HOST = "localhost"
password = "admin"
port = "4212"

def check_port():
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    res = sock.connect_ex((HOST, int(port)))
    sock.close()
    return res == 0

def checkstat():
  if not check_port(): 
    os.popen('vlc --no-audio --intf telnet --telnet-password admin --quiet 2>/dev/null &')
  while not check_port(): 
    time.sleep(.1)

def docmd(cmd):
  tn = telnetlib.Telnet(HOST, port)
  tn.read_until(b"Password: ")
  tn.write(password.encode('utf-8') + b"\n")
  tn.read_until(b"> ")
  tn.write(cmd.encode('utf-8') + b"\n")
  ans=tn.read_until(">".encode("utf-8"))[0:-3]
  return(ans)
  tn.close()

def nowplaying(playing):
  npstart=playing.find('now_playing')
  mystr=playing[npstart:]
  npend=mystr.find('\n')
  return mystr[:npend]

def metadata(playing):
  fstr='+----'
  mstart=playing.find(fstr)
  mend=playing.find(fstr,mstart+len(fstr))
  return playing[mstart:mend+len(fstr)]

checkstat()
docmd('add '+sys.argv[1])
playing=""
count=0
while not 'now_playing:' in playing:
  time.sleep(.5)
  playing=docmd('info')
  count+=1
  if count>9:
    break
if playing == "":
  print("--Timeout--")
else:
  print(metadata(playing))

docmd('shutdown')

例如,从Crypt Theater Station提取元数据:

./radiometatdata.py http://107.181.227.250:8026

回应:

+----[ Meta data ]
|
| title: *CRYPT THEATER*
| filename: 107.181.227.250:8026
| genre: Old Time Radio
| now_playing: CBS Radio Mystery Theatre - A Ghostly Game of Death
|
+----

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