获取 MP3 时长的 PHP 函数

Question

提问by ram

Is there any PHP function that will give me the MP3 duration. I looked at ID 3 function but i don't see any thing there for duration and apart from this,id3 is some kind of tag,which will not be there in all MP3 so using this will not make any sense.

是否有任何 PHP 函数可以为我提供 MP3 持续时间。我查看了 ID 3 函数，但我在持续时间内看不到任何东西，除此之外，id3 是某种标签，它不会出现在所有 MP3 中，因此使用它没有任何意义。

Answer 1

回答by Richard Askew

This should work for you, notice the getduration function: http://www.zedwood.com/article/127/php-calculate-duration-of-mp3

这应该对你有用，注意 getduration 函数：http://www.zedwood.com/article/127/php-calculate-duration-of-mp3

Answer 2

回答by TecBrat

Install getid3, but if you only need duration, you can delete all but these modules:

安装 getid3，但如果你只需要持续时间，你可以删除除这些模块之外的所有模块：

module.audio.mp3.php
module.tag.id3v1.php
module.tag.apetag.php
module.tag.id3v2.php

模块.audio.mp3.php
模块.tag.id3v1.php
模块.tag.apetag.php
模块.tag.id3v2.php

Access the duration with code like this:

使用如下代码访问持续时间：

$getID3 = new getID3;
$ThisFileInfo = $getID3->analyze($pathName);
$len= @$ThisFileInfo['playtime_string']; // playtime in minutes:seconds, formatted string

Get it at Sourceforge

在Sourceforge获取

Answer 3

回答by Mohin Mathakia

I have passed so many time, but without getID3 (http://getid3.sourceforge.net/) to get duration of audio file not possible.

我已经过去了很多时间，但是没有 getID3 ( http://getid3.sourceforge.net/) 无法获得音频文件的持续时间。

1) First download library of getID3 using below link:

1) 使用以下链接首先下载 getID3 库：

 https://github.com/JamesHeinrich/getID3/archive/master.zip

2) Try this below code:

2）试试下面的代码：

    <?php
       include("getid3/getid3.php");
       $filename = 'bcd4ecc6bf521da9b9a2d8b9616d1505.wav';
       $getID3 = new getID3;
       $file = $getID3->analyze($filename);
       $playtime_seconds = $file['playtime_seconds'];
       echo gmdate("H:i:s", $playtime_seconds);
    ?>

Answer 4

回答by awavi

You can get the duration of an mp3 or many other audio/video files by using ffmpeg.

您可以使用 ffmpeg 获取 mp3 或许多其他音频/视频文件的持续时间。

Install ffmpeg in your server.

Make sure that php shell_exec is not restricted in your php.

    // Discriminate only the audio/video files you want
    if(preg_match('/[^?#]+\.(?:wma|mp3|wav|mp4)/', strtolower($file))){
        $filepath = /* your file path */;
        // execute ffmpeg form linux shell and grab duration from output
        $result = shell_exec("ffmpeg -i ".$filepath.' 2>&1 | grep -o \'Duration: [0-9:.]*\'');
        $duration = str_replace('Duration: ', '', $result); // 00:05:03.25

        //get the duration in seconds
        $timeArr = preg_split('/:/', str_replace('s', '', $duration[0]));
        $t = $this->_times[$file] = (($timeArr[3])? $timeArr[3]*1 + $timeArr[2] * 60 + $timeArr[1] * 60 * 60 : $timeArr[2] + $timeArr[1] * 60)*1000;

    }

在您的服务器中安装 ffmpeg。

确保 php shell_exec 在您的 php.ini 中不受限制。

    // Discriminate only the audio/video files you want
    if(preg_match('/[^?#]+\.(?:wma|mp3|wav|mp4)/', strtolower($file))){
        $filepath = /* your file path */;
        // execute ffmpeg form linux shell and grab duration from output
        $result = shell_exec("ffmpeg -i ".$filepath.' 2>&1 | grep -o \'Duration: [0-9:.]*\'');
        $duration = str_replace('Duration: ', '', $result); // 00:05:03.25

        //get the duration in seconds
        $timeArr = preg_split('/:/', str_replace('s', '', $duration[0]));
        $t = $this->_times[$file] = (($timeArr[3])? $timeArr[3]*1 + $timeArr[2] * 60 + $timeArr[1] * 60 * 60 : $timeArr[2] + $timeArr[1] * 60)*1000;

    }

Answer 5

回答by debasish

<?php
class MP3File
{
protected $filename;
public function __construct($filename)
{
    $this->filename = $filename;
}

public static function formatTime($duration) //as hh:mm:ss
{
    //return sprintf("%d:%02d", $duration/60, $duration%60);
    $hours = floor($duration / 3600);
    $minutes = floor( ($duration - ($hours * 3600)) / 60);
    $seconds = $duration - ($hours * 3600) - ($minutes * 60);
    return sprintf("%02d:%02d:%02d", $hours, $minutes, $seconds);
}

//Read first mp3 frame only...  use for CBR constant bit rate MP3s
public function getDurationEstimate()
{
    return $this->getDuration($use_cbr_estimate=true);
}

//Read entire file, frame by frame... ie: Variable Bit Rate (VBR)
public function getDuration($use_cbr_estimate=false)
{
    $fd = fopen($this->filename, "rb");

    $duration=0;
    $block = fread($fd, 100);
    $offset = $this->skipID3v2Tag($block);
    fseek($fd, $offset, SEEK_SET);
    while (!feof($fd))
    {
        $block = fread($fd, 10);
        if (strlen($block)<10) { break; }
        //looking for 1111 1111 111 (frame synchronization bits)
        else if ($block[0]=="\xff" && (ord($block[1])&0xe0) )
        {
            $info = self::parseFrameHeader(substr($block, 0, 4));
            if (empty($info['Framesize'])) { return $duration; } //some corrupt mp3 files
            fseek($fd, $info['Framesize']-10, SEEK_CUR);
            $duration += ( $info['Samples'] / $info['Sampling Rate'] );
        }
        else if (substr($block, 0, 3)=='TAG')
        {
            fseek($fd, 128-10, SEEK_CUR);//skip over id3v1 tag size
        }
        else
        {
            fseek($fd, -9, SEEK_CUR);
        }
        if ($use_cbr_estimate && !empty($info))
        { 
            return $this->estimateDuration($info['Bitrate'],$offset); 
        }
    }
    return round($duration);
}

private function estimateDuration($bitrate,$offset)
{
    $kbps = ($bitrate*1000)/8;
    $datasize = filesize($this->filename) - $offset;
    return round($datasize / $kbps);
}

private function skipID3v2Tag(&$block)
{
    if (substr($block, 0,3)=="ID3")
    {
        $id3v2_major_version = ord($block[3]);
        $id3v2_minor_version = ord($block[4]);
        $id3v2_flags = ord($block[5]);
        $flag_unsynchronisation  = $id3v2_flags & 0x80 ? 1 : 0;
        $flag_extended_header    = $id3v2_flags & 0x40 ? 1 : 0;
        $flag_experimental_ind   = $id3v2_flags & 0x20 ? 1 : 0;
        $flag_footer_present     = $id3v2_flags & 0x10 ? 1 : 0;
        $z0 = ord($block[6]);
        $z1 = ord($block[7]);
        $z2 = ord($block[8]);
        $z3 = ord($block[9]);
        if ( (($z0&0x80)==0) && (($z1&0x80)==0) && (($z2&0x80)==0) && (($z3&0x80)==0) )
        {
            $header_size = 10;
            $tag_size = (($z0&0x7f) * 2097152) + (($z1&0x7f) * 16384) + (($z2&0x7f) * 128) + ($z3&0x7f);
            $footer_size = $flag_footer_present ? 10 : 0;
            return $header_size + $tag_size + $footer_size;//bytes to skip
        }
    }
    return 0;
}

public static function parseFrameHeader($fourbytes)
{
    static $versions = array(
        0x0=>'2.5',0x1=>'x',0x2=>'2',0x3=>'1', // x=>'reserved'
    );
    static $layers = array(
        0x0=>'x',0x1=>'3',0x2=>'2',0x3=>'1', // x=>'reserved'
    );
    static $bitrates = array(
        'V1L1'=>array(0,32,64,96,128,160,192,224,256,288,320,352,384,416,448),
        'V1L2'=>array(0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384),
        'V1L3'=>array(0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320),
        'V2L1'=>array(0,32,48,56, 64, 80, 96,112,128,144,160,176,192,224,256),
        'V2L2'=>array(0, 8,16,24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160),
        'V2L3'=>array(0, 8,16,24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160),
    );
    static $sample_rates = array(
        '1'   => array(44100,48000,32000),
        '2'   => array(22050,24000,16000),
        '2.5' => array(11025,12000, 8000),
    );
    static $samples = array(
        1 => array( 1 => 384, 2 =>1152, 3 =>1152, ), //MPEGv1,     Layers 1,2,3
        2 => array( 1 => 384, 2 =>1152, 3 => 576, ), //MPEGv2/2.5, Layers 1,2,3
    );
    //$b0=ord($fourbytes[0]);//will always be 0xff
    $b1=ord($fourbytes[1]);
    $b2=ord($fourbytes[2]);
    $b3=ord($fourbytes[3]);

    $version_bits = ($b1 & 0x18) >> 3;
    $version = $versions[$version_bits];
    $simple_version =  ($version=='2.5' ? 2 : $version);

    $layer_bits = ($b1 & 0x06) >> 1;
    $layer = $layers[$layer_bits];

    $protection_bit = ($b1 & 0x01);
    $bitrate_key = sprintf('V%dL%d', $simple_version , $layer);
    $bitrate_idx = ($b2 & 0xf0) >> 4;
    $bitrate = isset($bitrates[$bitrate_key][$bitrate_idx]) ? $bitrates[$bitrate_key][$bitrate_idx] : 0;

    $sample_rate_idx = ($b2 & 0x0c) >> 2;//0xc => b1100
    $sample_rate = isset($sample_rates[$version][$sample_rate_idx]) ? $sample_rates[$version][$sample_rate_idx] : 0;
    $padding_bit = ($b2 & 0x02) >> 1;
    $private_bit = ($b2 & 0x01);
    $channel_mode_bits = ($b3 & 0xc0) >> 6;
    $mode_extension_bits = ($b3 & 0x30) >> 4;
    $copyright_bit = ($b3 & 0x08) >> 3;
    $original_bit = ($b3 & 0x04) >> 2;
    $emphasis = ($b3 & 0x03);

    $info = array();
    $info['Version'] = $version;//MPEGVersion
    $info['Layer'] = $layer;
    //$info['Protection Bit'] = $protection_bit; //0=> protected by 2 byte CRC, 1=>not protected
    $info['Bitrate'] = $bitrate;
    $info['Sampling Rate'] = $sample_rate;
    $info['Framesize'] = self::framesize($layer, $bitrate, $sample_rate, $padding_bit);
    $info['Samples'] = $samples[$simple_version][$layer];
    return $info;
}

private static function framesize($layer, $bitrate,$sample_rate,$padding_bit)
{
    if ($layer==1)
        return intval(((12 * $bitrate*1000 /$sample_rate) + $padding_bit) * 4);
    else //layer 2, 3
        return intval(((144 * $bitrate*1000)/$sample_rate) + $padding_bit);
}
}
?>
<?php
$mp3file = new MP3File("Chal_Halke.mp3");//http://www.npr.org/rss/podcast.php?id=510282
$duration1 = $mp3file->getDurationEstimate();//(faster) for CBR only
$duration2 = $mp3file->getDuration();//(slower) for VBR (or CBR)
echo "duration: $duration1 seconds"."\n";

?>

Answer 6

回答by Ragnar123

There is no native php function to do this.

没有原生的 php 函数可以做到这一点。

Depending on your server environment, you may use a tool such as MP3Info.

根据您的服务器环境，您可以使用MP3Info等工具。

$length = shell_exec('mp3info -p "%S" sample.mp3');   // total time in seconds

Answer 7

回答by LSerni

The MP3 length is not stored anywhere (in the "plain" MP3 format), since MP3 is designed to be "split" into frames and those frames will remain playable.

MP3 长度不会存储在任何地方（以“普通”MP3 格式），因为 MP3 被设计为“拆分”成帧并且这些帧将保持可播放。

http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm

If you have no ID tag on which to rely, what you would need to do (there are tools and PHP classes that do this) is to read the whole MP3 file and sum the durations of each frame.

如果您没有可依赖的 ID 标签，那么您需要做的（有工具和 PHP 类可以执行此操作）是读取整个 MP3 文件并对每个帧的持续时间求和。

Answer 8

回答by Software Architecture

Finally, I developed a solution with my own calculations. This solution works best for mp3and WAVfiles formats. However minor precision variations are expected. The solution is in PHP. I take little bit clue from WAV

最后，我用自己的计算开发了一个解决方案。此解决方案最适用于mp3和WAV文件格式。然而，预计会有微小的精度变化。解决方案是在PHP 中。我从WAV 中获取了一点线索

function calculateFileSize($file){

    $ratio = 16000; //bytespersec

    if (!$file) {

        exit("Verify file name and it's path");

    }

    $file_size = filesize($file);

    if (!$file_size)
        exit("Verify file, something wrong with your file");

    $duration = ($file_size / $ratio);
    $minutes = floor($duration / 60);
    $seconds = $duration - ($minutes * 60);
    $seconds = round($seconds);
    echo "$minutes:$seconds minutes";

}

$file = 'apple-classic.mp3'; //Enter File Name mp3/wav
calculateFileSize($file);

Answer 9

回答by Software Architecture

As earlier, I provided a solution for both mp3and WAVfiles, Now this solution is specifically for the only WAVfile with more precisionbut with longer evaluationtime than the earlier solution.

如前所述，我为mp3和WAV文件提供了一个解决方案，现在这个解决方案专门用于唯一比早期解决方案精度更高但评估时间更长的WAV文件。

function calculateWavDuration( $file ) {

    $fp = fopen($file, 'r');

    if (fread($fp, 4) == "RIFF") {

        fseek($fp, 20);
        $raw_header = fread($fp, 16);
        $header = unpack('vtype/vchannels/Vsamplerate/Vbytespersec/valignment/vbits', $raw_header);
        $pos = ftell($fp);

        while (fread($fp, 4) != "data" && !feof($fp)) {

            $pos++;
            fseek($fp, $pos);

        }

        $raw_header = fread($fp, 4);
        $data = unpack('Vdatasize', $raw_header);
        $sec = $data[datasize] / $header[bytespersec];
        $minutes = intval(($sec / 60) % 60);
        $seconds = intval($sec % 60);

        return str_pad($minutes, 2, "0", STR_PAD_LEFT) . ":" . str_pad($seconds, 2, "0", STR_PAD_LEFT);

    }

}

$file = '1.wav'; //Enter File wav
calculateWavDuration($file);

Answer 10

回答by Andi Kur

$getID3 = new getID3;
$ThisFileInfo = $getID3->analyze($pathName);

// playtime in minutes:seconds, formatted string
$len = @$ThisFileInfo['playtime_string']; 

//don't get playtime_string, but get playtime_seconds
$len = @$ThisFileInfo['playtime_seconds']*1000; //*1000 as calculate millisecond

I hope this helps you.

我希望这可以帮助你。

获取 MP3 时长的 PHP 函数

提问by ram

回答by Richard Askew

回答by TecBrat

回答by Mohin Mathakia

回答by awavi

回答by debasish

回答by Ragnar123

回答by LSerni

回答by Software Architecture

回答by Software Architecture

回答by Andi Kur

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获取 MP3 时长的 PHP 函数

提问by ram

回答by Richard Askew

回答by TecBrat

回答by Mohin Mathakia

回答by awavi

回答by debasish

回答by Ragnar123

回答by LSerni

回答by Software Architecture

回答by Software Architecture

回答by Andi Kur

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