Google 文字转语音 API returns 没有声音的 mp3 文件

Question

我尝试使用 Google 翻译 API 将文本转换为 mp3 文件，但一定是出了什么问题，因为 mp3 文件没有任何声音。

我用记事本打开了MP3文件，结果是这样的：

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://ipv4.google.com/sorry/index? 
continue=http://translate.google.com/translate_tts%3Fie%3DUTF-8%26q%3DOra%2BAscolteremo%253A%2BPovia%2Bin%2BSiamo%2BItaliani%26tl%3Den%26total%3D6%26idx%3D0%26textlen%3D40&amp;q=EgRXCPWrGMKjydYFIhkA8aeDS8BgGC4RXqJ61WyJio4ttFxmZp7GMgFy">here
</A>.
</BODY></HTML>

看起来像是 API 的错误输出，但我无法弄清楚问题出在哪里。

这是我的代码：

HTML:

<html lang="en">
<head>
</head>
 <body>
     <div class="container">
        <form action="upload.php" method="post" enctype="multipart/form-data">
        <input type="file"  accept=".mp3,audio/*" name="uploadMP3" multiple >
        <input type="submit" name="conferma">
        </form>

    </div>
</body>

PHP:

 <?php
 include $_SERVER['DOCUMENT_ROOT'].'/Text-to-speech/text2Speech.class.php'; 
 $t2s = new PHP_Text2Speech;

 $string="Helllo";
 echo $t2s->speak($string);

 ?>

这是文字转语音class:

class PHP_Text2Speech {
/** Max text characters
 */
var $maxStrLen = 100;
/** Text len
 */
var $textLen = 0;
/** No of words
 */
var $wordCount = 0;
/** Language of text (ISO 639-1)
 */
var $lang = 'en';
/** Text to speak
 */
var $text = NULL;
/** File name format
 */
var $mp3File = "%s.mp3";
/** Directory to store audio file
 */
var $audioDir = "audio/";
/** Contents
*/
var $contents = NULL;
/** Function make request to Google translate, download file and returns audio file path
 */
function speak($text, $lang = NULL) {

    if ($lang !== NULL) {
        $this->lang = $lang;
    }

    // Create dir if not exists
    if (!is_dir($this->audioDir)) {
        mkdir($this->audioDir, 0755) or die('Could not create audio dir: ' . $this->audioDir);
    }

    // Try to set writing permissions for audio dir.
    if (!is_writable($this->audioDir)) { 
        chmod($this->audioDir, 0755) or die('Could not set appropriate permissions for audio dir: ' . $this->audioDir);
    }

    // Can not handle more than 100 characters so split text
    if (strlen($text) > $this->maxStrLen) {
        $this->text = $text;
        // Generate unique mp3 file name
        $file = sprintf($this->mp3File, $this->audioDir . md5($this->text));
        if (!file_exists($file)) {
            $texts = array();
            $words = explode(' ', $this->text);
            $i = 0;
            $texts[$i] = NULL;
            foreach ($words as $w) {
                $w = trim($w);
                if (strlen($texts[$i] . ' ' . $w) < $this->maxStrLen) {
                    $texts[$i] = $texts[$i] . ' ' . $w; 
                } else {
                    $texts[++$i] = $w;
                }
            }

            // Get get separated files contents and marge them into one
            foreach ($texts as $txt) {
                $pFile = $this->speak($txt, $this->lang);
                $this->contents .= $this->stripTags(file_get_contents($pFile));
                unlink($pFile);
            }
            unset($words, $texts);

            // Save file
            file_put_contents($file, $this->contents);
            $this->contents = NULL;
        }
    } else {

        // Generate unique mp3 file name
        $file = sprintf($this->mp3File, $this->audioDir . md5($text));

        if (!file_exists($file)) {
            // Text lenght
            $this->textLen = strlen($text);

            // Words count
            $this->wordCount = str_word_count($text);

            // Encode string
            $text = urlencode($text);

            // Download new file 
            //$this->download("http://translate.google.com/translate_tts?q=".$text);
            $this->download("http://translate.google.com/translate_tts?ie=UTF-8&q={$text}&tl={$this->lang}&total={$this->wordCount}&idx=0&textlen={$this->textLen}", $file);

        }
    }

    // Returns mp3 file path
    return $file;
}

/** Function to download and save file
 * @param   String  $url        - URL
 * @param   String  $path       - Local path
 */ 
function download($url, $path) { 
    // Is curl installed?
    if (!function_exists('curl_init')) { // use file get contents 
        $output = file_get_contents($url); 
    } else { // use curl 
        $ch = curl_init(); 
        curl_setopt($ch, CURLOPT_URL, $url); 
        curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE); 
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1"); 
        curl_setopt($ch, CURLOPT_HEADER, 0); 
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); 
        curl_setopt($ch, CURLOPT_TIMEOUT, 10); 
        $output = curl_exec($ch); 
        curl_close($ch); 
    }
    // Save file
    file_put_contents($path, $output);
}
}

Answer 1

如果您在浏览器中打开 URL，您会看到 Google 因未授权 activity 阻止了您。也许您使用该服务的范围太广了。

整体翻译 API 不应该用于文本到语音。这是一个已经使用了很多年的 hack，但不能保证一定有效。现在Google引入了官方付费text to speech API，你还是用它吧

Google 文字转语音 API returns 没有声音的 mp3 文件

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