--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// //
+// /demo/demo.joinmp3.php - part of getID3() //
+// Sample script for splicing two or more MP3s together into //
+// one file. Does not attempt to fix VBR header frames. //
+// Can also be used to extract portion from single file. //
+// See readme.txt for more details //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+// sample usage:
+// $FilenameOut = 'combined.mp3';
+// $FilenamesIn[] = 'first.mp3'; // filename with no start/length parameters
+// $FilenamesIn[] = array('second.mp3', 0, 0); // filename with zero for start/length is the same as not specified (start = beginning, length = full duration)
+// $FilenamesIn[] = array('third.mp3', 0, 10); // extract first 10 seconds of audio
+// $FilenamesIn[] = array('fourth.mp3', -10, 0); // extract last 10 seconds of audio
+// $FilenamesIn[] = array('fifth.mp3', 10, 0); // extract everything except first 10 seconds of audio
+// $FilenamesIn[] = array('sixth.mp3', 0, -10); // extract everything except last 10 seconds of audio
+// if (CombineMultipleMP3sTo($FilenameOut, $FilenamesIn)) {
+// echo 'Successfully copied '.implode(' + ', $FilenamesIn).' to '.$FilenameOut;
+// } else {
+// echo 'Failed to copy '.implode(' + ', $FilenamesIn).' to '.$FilenameOut;
+// }
+//
+// Could also be called like this to extract portion from single file:
+// CombineMultipleMP3sTo('sample.mp3', array(array('input.mp3', 0, 30))); // extract first 30 seconds of audio
+
+
+function CombineMultipleMP3sTo($FilenameOut, $FilenamesIn) {
+
+ foreach ($FilenamesIn as $nextinputfilename) {
+ if (is_array($nextinputfilename)) {
+ $nextinputfilename = $nextinputfilename[0];
+ }
+ if (!is_readable($nextinputfilename)) {
+ echo 'Cannot read "'.$nextinputfilename.'"<BR>';
+ return false;
+ }
+ }
+ if ((file_exists($FilenameOut) && !is_writeable($FilenameOut)) || (!file_exists($FilenameOut) && !is_writeable(dirname($FilenameOut)))) {
+ echo 'Cannot write "'.$FilenameOut.'"<BR>';
+ return false;
+ }
+
+ require_once(dirname(__FILE__).'/../getid3/getid3.php');
+ ob_start();
+ if ($fp_output = fopen($FilenameOut, 'wb')) {
+
+ ob_end_clean();
+ // Initialize getID3 engine
+ $getID3 = new getID3;
+ foreach ($FilenamesIn as $nextinputfilename) {
+ $startoffset = 0;
+ $length_seconds = 0;
+ if (is_array($nextinputfilename)) {
+ @list($nextinputfilename, $startoffset, $length_seconds) = $nextinputfilename;
+ }
+ $CurrentFileInfo = $getID3->analyze($nextinputfilename);
+ if ($CurrentFileInfo['fileformat'] == 'mp3') {
+
+ ob_start();
+ if ($fp_source = fopen($nextinputfilename, 'rb')) {
+
+ ob_end_clean();
+ $CurrentOutputPosition = ftell($fp_output);
+
+ // copy audio data from first file
+ $start_offset_bytes = $CurrentFileInfo['avdataoffset'];
+ if ($startoffset > 0) { // start X seconds from start of audio
+ $start_offset_bytes = $CurrentFileInfo['avdataoffset'] + round($CurrentFileInfo['bitrate'] / 8 * $startoffset);
+ } elseif ($startoffset < 0) { // start X seconds from end of audio
+ $start_offset_bytes = $CurrentFileInfo['avdataend'] + round($CurrentFileInfo['bitrate'] / 8 * $startoffset);
+ }
+ $start_offset_bytes = max($CurrentFileInfo['avdataoffset'], min($CurrentFileInfo['avdataend'], $start_offset_bytes));
+
+ $end_offset_bytes = $CurrentFileInfo['avdataend'];
+ if ($length_seconds > 0) { // seconds from start of audio
+ $end_offset_bytes = $start_offset_bytes + round($CurrentFileInfo['bitrate'] / 8 * $length_seconds);
+ } elseif ($length_seconds < 0) { // seconds from start of audio
+ $end_offset_bytes = $CurrentFileInfo['avdataend'] + round($CurrentFileInfo['bitrate'] / 8 * $startoffset);
+ }
+ $end_offset_bytes = max($CurrentFileInfo['avdataoffset'], min($CurrentFileInfo['avdataend'], $end_offset_bytes));
+
+ if ($end_offset_bytes <= $start_offset_bytes) {
+ echo 'failed to copy '.$nextinputfilename.' from '.$startoffset.'-seconds start for '.$length_seconds.'-seconds length (not enough data)';
+ fclose($fp_source);
+ fclose($fp_output);
+ return false;
+ }
+
+ fseek($fp_source, $start_offset_bytes, SEEK_SET);
+ while (!feof($fp_source) && (ftell($fp_source) < $end_offset_bytes)) {
+ fwrite($fp_output, fread($fp_source, min(32768, $end_offset_bytes - ftell($fp_source))));
+ }
+ fclose($fp_source);
+
+ } else {
+
+ $errormessage = ob_get_contents();
+ ob_end_clean();
+ echo 'failed to open '.$nextinputfilename.' for reading';
+ fclose($fp_output);
+ return false;
+
+ }
+
+ } else {
+
+ echo $nextinputfilename.' is not MP3 format';
+ fclose($fp_output);
+ return false;
+
+ }
+
+ }
+
+ } else {
+
+ $errormessage = ob_get_contents();
+ ob_end_clean();
+ echo 'failed to open '.$FilenameOut.' for writing';
+ return false;
+
+ }
+
+ fclose($fp_output);
+ return true;
+}
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