Merge Two Mp3 PHP

Merge two mp3 php

If by merging, you mean placing one audio over the other, then please disregard this answer.

If you dont want to re-encode the MP3s, you can probably just append them. I know this worked for MPEG movies, so I guess it could work for MP3s too. Another option would be to add the audo files to a Zip Archive with no compression and then rename the extension to .mp3.

I did a quick test and this

file_put_contents('combined.mp3',
    file_get_contents('file1.mp3') .
    file_get_contents('file2.mp3'));

worked fine. The ID3 tags will be wrong, but the resulting file contains both audio files. For some other possible gotchas, see the link in Pekka's answer.

Also, some quick googling resulted in

• http://www.sourcerally.net/Scripts/20-PHP-MP3-Class
• http://codingforums.com/showthread.php?t=169069

and some discussion

• http://ask.metafilter.com/21381/Merge-mp3s-with-PHP

How to mix/merge 2 mp3 files in PHP?

Based off of this question, you should be able to install FFMPEG onto your server (hopefully not a shared host?) and use

//Reduce background volume, assuming it's input2.mp3
shell_exec('ffmpeg -i input2.mp3 -af "volume=0.3" backround.wav');
//Merge the two
shell_exec('ffmpeg -y -i input1.mp3 -i background.wav -filter_complex amerge -c:a libmp3lame -q:a 4 output.mp3');

Then you can simply serve up the output.mp3 file. If this is being performed by PHP running under apache (or other web host, instead of CLI) you'll need to make sure your www-data user has read access to the input files, and write access to the output directory.

All your temporary output, like the background, should be saved as .wav, and only converted back to .mp3 for the final output. Recompressing the audio at each step may result in a very poor final output.

I am making assumptions about how FFMPEG works here, so you may need to consult the documentation for it in order to build a functioning or more efficient set of commands.

Combine/Concatenate MP3s on Server Using PHP

If you can access the shell from within PHP on your environment, I would just call out to the shell (with the backtick operator) and use SoX.

Merge mp3 files into one and then save in a folder using php

Add this method to your mp3 class.

// Save the new mp3 into the file system
function savefile($path){
    return file_put_contents($path, $this->str);
}

Then to use it simply ... replace

$mp3->output('word.mp3'); //Output file (current a blank file)

with this

$mp3->savefile('/path/to/directory/file.mp3');

and make sure you modify the path to a real directory within your file system.

Combine an unknown number of .mp3 files

You can call file_put_contents with the FILE APPEND flag. Something like this should work

$number = 1;
$mp3 = file_get_contents("http://example.com/text=".$value);
$file = md5($value).".mp3";
file_put_contents($file, $mp3, FILE_APPEND);
$number++;

Need to convert working php code into function (merging mp3 files randomly)

You need to use loops

<?php
$start_file = 1; //first file
$files_count = 3; //count of all educational files
$prefix = array("mp3files/prefix.mp3", "mp3files/blank.mp3");
for ($i = $start_file; $i <= $files_count; $i++){
    $s_rand = $prefix[rand(0,sizeof($prefix)-1)];
    file_put_contents('mp3files/comb' . $i. '.mp3',
    file_get_contents($s_rand) .
    file_get_contents('mp3files/' . $i. '.mp3'));
    echo ('mp3files/comb' . $i. '.mp3');
}

using PHP shell_exec and ffmpeg to merge 2 audio files

After messing around and switching the variables I got it to work, It may have been file permissions issue, also i got rid of dropout_transition, according to ffmpeg documentation it defaults to 2:

    $file_path = 'beats/' . $timecode . '.' . $file_extn;
    $overlay = 'beats/tagoverlay.mp3';
    shell_exec('ffmpeg -i ' . $file_path . ' -i ' . $overlay . ' -filter_complex amix=inputs=2:duration=first beats/' . $timecode . 'tagged.mp3'); 

What is the best way to merge mp3 files?

As Thomas Owens pointed out, simply concatenating the files will leave multiple ID3 headers scattered throughout the resulting concatenated file - so the time/bitrate info will be wildly wrong.

You're going to need to use a tool which can combine the audio data for you.

mp3wrap would be ideal for this - it's designed to join together MP3 files, without needing to decode + re-encode the data (which would result in a loss of audio quality) and will also deal with the ID3 tags intelligently.

The resulting file can also be split back into its component parts using the mp3splt tool - mp3wrap adds information to the IDv3 comment to allow this.

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