update getid3 to v1.9.23 & Sortable.js to v1.15.1

Author: dleffler

external/ExtPrograms.csv

@@ -2,13 +2,13 @@ Program,Version,URL,Avail version,Exponent Customization Notes:
 Swiftmailer,5.4.12/6.3.0,github.com/swiftmailer/swiftmailer,6.3.0,we add  eDebugLogger & eDebugHtmlReporter plugins & fix php 5.6 ssl issue
 Doctrine Lexer,2.1.0,github.com/doctrine/lexer,2.1.0/3.0.0,needed by swiftmailer v6
 Doctrine Deprecations,1.1.2,github.com/doctrine/deprecations,1.1.2,needed by Doctrine Lexer v2
-EmailValidator,3.2.6,github.com/egulias/EmailValidator,3.2.6/4.0.1,needed by swiftmailer v6; change folder structure and add autoloader to main file
+EmailValidator,3.2.6,github.com/egulias/EmailValidator,3.2.6/4.0.2,needed by swiftmailer v6; change folder structure and add autoloader to main file
 ups-php,0.2,github.com/sanbornm/ups-php,0.2,"updated/fixed xml, etc to work"
 fedex-php,31.0.0,www.fedex.com/wpor/web/jsp/drclinks.jsp?links=wss/getstarted.html,31.0.0,copy/edit RateAvailableServicesWebServiceClient.php into fedexshippingcalculator->getRates()
 Smarty,3.1.27/4.3.4,smarty.net,4.3.4,
 phpthumb,1.7.22exp,github.com/JamesHeinrich/phpThumb,1.7.22,phpThumb.config.php - we also allow &amp in parsing and err command
-getid3,1.9.22,github.com/JamesHeinrich/getID3,1.9.22,
-minify,2.3.3,github.com/mrclay/minify,2.3.3/3.0.14,modify config.php
+getid3,1.9.22,github.com/JamesHeinrich/getID3,1.9.23,
+minify,2.3.3,github.com/mrclay/minify,2.3.3/3.0.4,modify config.php
 YUI2,2.9.0,developer.yahoo.com/yui/2,2.9.0,
 YUI3,3.18.1,github.com/yui/yui3,3.18.1,
 yui2in3,0.3,github.com/yui/2in3,0.3,
@@ -29,7 +29,7 @@ Twitter-Bootstrap2,2.3.2,github.com/twbs/bootstrap,2.3.2,"patched bootstrap.less
 Bootstrap3,3.4.1,github.com/twbs/bootstrap,3.4.1,patched bootstrap.less includes swatches & exp variables
 Bootstrap4,4.6.2,github.com/twbs/bootstrap,4.6.2,"patched bootstrap.scss includes swatches & exp variables, remove @page"
 Bootstrap5,5.3.2,github.com/twbs/bootstrap,5.3.2,patched bootstrap.scss includes swatches & exp variables
-popper.js/floating-ui,1.16.1,github.com/FezVrasta/popper.js,1.16.1/2.11.7,needed by BS4/BS5 (umd)
+popper.js/floating-ui,1.16.1,github.com/FezVrasta/popper.js,1.16.1/2.11.8,needed by BS4/BS5 (umd)
 Bootswatch2,2.3.2,bootswatch.com,2.3.2,
 Bootswatch3,3.4.1+1,bootswatch.com,3.4.1+1,change 1st line variables.less comment to output to .css file
 Bootswatch4,4.6.2,bootswatch.com,4.6.2,change 1st line variables.scss comment to output to .css file
@@ -39,7 +39,7 @@ Font-Awesome4,4.7.0,fontawesome.github.com/Font-Awesome,4.7.0,
 Font-Awesome5,5.15.4,fontawesome.com,5.15.4,add import all 'fonts' sheets into main sheet
 Font-Awesome6,6.5.1,fontawesome.com,6.5.1,add import all 'fonts' sheets into main sheet
 Bootstrap-Icons,1.11.2,icons.getbootstrap.com,1.11.2,"patched bootstrap-icons.scss for custom folder structure, includes animation & size variables"
-Adminer,4.8.1exp,www.adminer.org,4.8.1,"customized plugins: tinymce, ckeditor, previewSerialized, edit-textarea & edit-calendar; edit sql tweak"
+Adminer,4.8.1exp,www.adminer.org,4.8.3,"customized plugins: tinymce, ckeditor, previewSerialized, edit-textarea & edit-calendar; edit sql tweak"
 SimpleAjaxUploader,2.6.7,github.com/LPology/Simple-Ajax-Uploader,2.6.7,also converted to yui module 2.5.3
 normalize.css,8.0.1,necolas.github.com/normalize.css,8.0.1,auto included in bootstrap 3
 MediaElement.js,7.0.2,mediaelementjs.com,7.0.2,
@@ -79,10 +79,10 @@ Searcher,0.3.0,github.com/lloiser/jquery-searcher,0.3.0,
 DateTimePicker,2.5.21exp,github.com/xdan/datetimepicker,2.5.21,rename .full version; we add .js auto-close on inline date select and extra 'reset' work & remove .css z-index issue
 Bootstrap DateTimePicker,4.17.49,github.com/Eonasdan/bootstrap-datetimepicker,4.17.49,"patch for 'today' button in side-by-side view, modded version placed in bootstrap4theme & bootstrap5theme to help yadcf"
 Tempus Dominus Bootstrap 4,5.39.0,github.com/tempusdominus/bootstrap-4,5.39.0,
-Tempus Dominus Bootstrap 5,6.7.16,github.com/Eonasdan/tempus-dominus,6.7.19,added .inline z-index style; scss change @use color
+Tempus Dominus Bootstrap 5,6.7.16,github.com/Eonasdan/tempus-dominus,6.9.4,added .inline z-index style; scss change @use color
 moment.js,2.29.4,github.com/moment/moment,2.29.4,needed for Bootstrap DateTimePicker; min/moment-with-locales.js renamed
 strength-meter,1.1.4,github.com/kartik-v/strength-meter,1.1.4,
-Sortable,1.15.0,github.com/SortableJS/Sortable,1.15.0,
+Sortable,1.15.0,github.com/SortableJS/Sortable,1.15.1,
 jstree,3.3.16,github.com/vakata/jstree,3.3.16,added nav menu icons to stylesheet
 bootstrap3-dialog,1.35.4,github.com/nakupanda/bootstrap3-dialog,1.35.4,use /src .less file and add our .less variable imports; w/ bs4 fixes
 impromptu,6.2.3,trentrichardson.com/Impromptu,6.2.3,add some colors to .css
@@ -115,7 +115,7 @@ FPDI,2.3.6,github.com/Setasign/FPDI,2.6.0,"optional, required by mPDF v7+"
 HTML2PDF,5.2.7/4.6.1,github.com/spipu/html2pdf,5.2.8,"optional, we tweak tcpdfConfig.php"
 TCPDF,6.6.2,sourceforge.net/projects/tcpdf,6.6.5,"optional, used by HTML2PDF"
 iLess,2.2.0,github.com/mishal/iless,2.2.0,"optional, has issues with bootstrap v2"
-Kint,1.1/2.2/5.0.7,github.com/kint-php/kint,5.0.7,"optional, for formatted edebug output"
+Kint,1.1/2.2/5.0.7,github.com/kint-php/kint,5.1.0,"optional, for formatted edebug output"
 ,,,,
 Not included yet,,,,
 DataTables Buttons,,www.datatables.net,2.4.2,

external/getid3/README.md

@@ -22,7 +22,7 @@ getID3() is released under multiple licenses. You may choose from the following
 
 **getID3 Commercial License:**
 
-* [gCL](https://www.getid3.org/#gCL) (payment required)
+* [gCL](https://www.getid3.org/#gCL) (no longer available, existing licenses remain valid)
 
 * * *
 Copies of each of the above licenses are included in the `licenses/`
@@ -125,7 +125,7 @@ Reads & parses (to varying degrees):
   * SWF (Flash)
   * PhotoCD
 
-+ data: 
++ data:
   * ISO-9660 CD-ROM image (directory structure)
   * SZIP (limited support)
   * ZIP (directory structure)
@@ -297,7 +297,7 @@ could essentially write it today with a one-line function:
 
 ``` php
 function getID3($filename) { return unpack('a3TAG/a30title/a30artist/a30album/a4year/a28comment/c1track/c1genreid', substr(file_get_contents($filename), -128)); }
-    
+
 ```
 
 

external/getid3/changelog.txt

@@ -18,6 +18,19 @@
 Version History
 ===============
 
+1.9.23: [2023-10-19] James Heinrich :: 1.9.23-202310190849
+	» add detection support for 7-zip archives
+	* #424 RIFF Undefined index "data"
+	* #421 tag.xmp remove GLOBALS
+	* #419 Quicktime Undefined index "time_scale"
+	* #418 tag.xmp zero-length fread
+	* #414 Quicktime bitrate for mp4 audio
+	* #413 Quicktime audio metadata
+	* #410 MPEG-1 pixel aspect ratio
+	* #407 PHP 8.1 compatibility
+	* #404 guard against division by zero
+	* #402 remove utf8_encode/utf8_decode
+
 1.9.22: [2022-09-29] James Heinrich :: 1.9.22-202207161647
 	* bugfix #387 fails to detect h265 video codec (QuickTime)
 	* bugfix #385 Quicktime extended atom size

external/getid3/getid3/getid3.lib.php

@@ -127,14 +127,26 @@ public static function intValueSupported($num) {
 		return false;
 	}
 
+	/**
+	 * Perform a division, guarding against division by zero
+	 *
+	 * @param float|int $numerator
+	 * @param float|int $denominator
+	 * @param float|int $fallback
+	 * @return float|int
+	 */
+	public static function SafeDiv($numerator, $denominator, $fallback = 0) {
+		return $denominator ? $numerator / $denominator : $fallback;
+	}
+
 	/**
 	 * @param string $fraction
 	 *
 	 * @return float
 	 */
 	public static function DecimalizeFraction($fraction) {
 		list($numerator, $denominator) = explode('/', $fraction);
-		return $numerator / ($denominator ? $denominator : 1);
+		return (int) $numerator / ($denominator ? $denominator : 1);
 	}
 
 	/**
@@ -871,10 +883,6 @@ public static function iconv_fallback_int_utf8($charval) {
 	 * @return string
 	 */
 	public static function iconv_fallback_iso88591_utf8($string, $bom=false) {
-		if (function_exists('utf8_encode')) {
-			return utf8_encode($string);
-		}
-		// utf8_encode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
 		$newcharstring = '';
 		if ($bom) {
 			$newcharstring .= "\xEF\xBB\xBF";
@@ -943,10 +951,6 @@ public static function iconv_fallback_iso88591_utf16($string) {
 	 * @return string
 	 */
 	public static function iconv_fallback_utf8_iso88591($string) {
-		if (function_exists('utf8_decode')) {
-			return utf8_decode($string);
-		}
-		// utf8_decode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
 		$newcharstring = '';
 		$offset = 0;
 		$stringlength = strlen($string);

external/getid3/getid3/getid3.php

@@ -387,7 +387,7 @@ class getID3
 	 */
 	protected $startup_warning = '';
 
-	const VERSION           = '1.9.22-202207161647';
+	const VERSION           = '1.9.23-202310190849';
 	const FREAD_BUFFER_SIZE = 32768;
 
 	const ATTACHMENTS_NONE   = false;
@@ -436,17 +436,17 @@ public function __construct() {
 			$this->startup_error .= 'WARNING: php.ini contains "mbstring.func_overload = '.ini_get('mbstring.func_overload').'", getID3 cannot run with this setting (bitmask 2 (string functions) cannot be set). Recommended to disable entirely.'."\n";
 		}
 
-		// check for magic quotes in PHP < 7.4.0 (when these functions became deprecated)
-		if (version_compare(PHP_VERSION, '7.4.0', '<')) {
+		// check for magic quotes in PHP < 5.4.0 (when these options were removed and getters always return false)
+		if (version_compare(PHP_VERSION, '5.4.0', '<')) {
 			// Check for magic_quotes_runtime
 			if (function_exists('get_magic_quotes_runtime')) {
-				if (get_magic_quotes_runtime()) {
+				if (get_magic_quotes_runtime()) { // @phpstan-ignore-line
 					$this->startup_error .= 'magic_quotes_runtime must be disabled before running getID3(). Surround getid3 block by set_magic_quotes_runtime(0) and set_magic_quotes_runtime(1).'."\n";
 				}
 			}
 			// Check for magic_quotes_gpc
 			if (function_exists('get_magic_quotes_gpc')) {
-				if (get_magic_quotes_gpc()) {
+				if (get_magic_quotes_gpc()) { // @phpstan-ignore-line
 					$this->startup_error .= 'magic_quotes_gpc must be disabled before running getID3(). Surround getid3 block by set_magic_quotes_gpc(0) and set_magic_quotes_gpc(1).'."\n";
 				}
 			}
@@ -1464,6 +1464,16 @@ public function GetFileFormatArray() {
 							'fail_ape'  => 'ERROR',
 						),
 
+				// XZ   - data         - XZ compressed data
+				'7zip'  => array(
+							'pattern'   => '^7z\\xBC\\xAF\\x27\\x1C',
+							'group'     => 'archive',
+							'module'    => '7zip',
+							'mime_type' => 'application/x-7z-compressed',
+							'fail_id3'  => 'ERROR',
+							'fail_ape'  => 'ERROR',
+						),
+
 
 				// Misc other formats
 
@@ -1977,7 +1987,7 @@ public function CalculateCompressionRatioVideo() {
 		}
 		$BitrateUncompressed = $this->info['video']['resolution_x'] * $this->info['video']['resolution_y'] * $this->info['video']['bits_per_sample'] * $FrameRate;
 
-		$this->info['video']['compression_ratio'] = $BitrateCompressed / $BitrateUncompressed;
+		$this->info['video']['compression_ratio'] = getid3_lib::SafeDiv($BitrateCompressed, $BitrateUncompressed, 1);
 		return true;
 	}
 
@@ -2183,6 +2193,8 @@ public function setStringMode($string) {
 	}
 
 	/**
+	 * @phpstan-impure
+	 *
 	 * @return int|bool
 	 */
 	protected function ftell() {
@@ -2195,6 +2207,8 @@ protected function ftell() {
 	/**
 	 * @param int $bytes
 	 *
+	 * @phpstan-impure
+	 *
 	 * @return string|false
 	 *
 	 * @throws getid3_exception
@@ -2240,6 +2254,8 @@ protected function fread($bytes) {
 	 * @param int $bytes
 	 * @param int $whence
 	 *
+	 * @phpstan-impure
+	 *
 	 * @return int
 	 *
 	 * @throws getid3_exception
@@ -2281,6 +2297,8 @@ protected function fseek($bytes, $whence=SEEK_SET) {
 	}
 
 	/**
+	 * @phpstan-impure
+	 *
 	 * @return string|false
 	 *
 	 * @throws getid3_exception
@@ -2336,6 +2354,8 @@ protected function fgets() {
 	}
 
 	/**
+	 * @phpstan-impure
+	 *
 	 * @return bool
 	 */
 	protected function feof() {

external/getid3/getid3/module.archive.hpk.php

@@ -43,7 +43,7 @@ public function Analyze() {
 			$info['hpk']['header']['fragmented_filesystem_offset'] = getid3_lib::LittleEndian2Int(substr($HPKheader, 28, 4));
 			$info['hpk']['header']['fragmented_filesystem_length'] = getid3_lib::LittleEndian2Int(substr($HPKheader, 32, 4));
 
-			$info['hpk']['header']['filesystem_entries'] = $info['hpk']['header']['fragmented_filesystem_length'] / ($info['hpk']['header']['fragments_per_file'] * 8);
+			$info['hpk']['header']['filesystem_entries'] = getid3_lib::SafeDiv($info['hpk']['header']['fragmented_filesystem_length'], $info['hpk']['header']['fragments_per_file'] * 8);
 			$this->fseek($info['hpk']['header']['fragmented_filesystem_offset']);
 			for ($i = 0; $i < $info['hpk']['header']['filesystem_entries']; $i++) {
 				$offset = getid3_lib::LittleEndian2Int($this->fread(4));

external/getid3/getid3/module.audio-video.asf.php

@@ -193,7 +193,7 @@ public function Analyze() {
 						$info['playtime_seconds'] = ($thisfile_asf_filepropertiesobject['play_duration'] / 10000000) - ($thisfile_asf_filepropertiesobject['preroll'] / 1000);
 
 						//$info['bitrate'] = $thisfile_asf_filepropertiesobject['max_bitrate'];
-						$info['bitrate'] = ((isset($thisfile_asf_filepropertiesobject['filesize']) ? $thisfile_asf_filepropertiesobject['filesize'] : $info['filesize']) * 8) / $info['playtime_seconds'];
+						$info['bitrate'] = getid3_lib::SafeDiv($thisfile_asf_filepropertiesobject['filesize'] * 8, $info['playtime_seconds']);
 					}
 					break;
 
@@ -1066,7 +1066,7 @@ public function Analyze() {
 								break;
 						}
 
-						if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) {
+						if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) { // @phpstan-ignore-line
 							foreach ($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'] as $dummy => $dataarray) {
 								if (isset($dataarray['flags']['stream_number']) && ($dataarray['flags']['stream_number'] == $streamnumber)) {
 									$thisfile_asf_audiomedia_currentstream['bitrate'] = $dataarray['bitrate'];
@@ -1152,7 +1152,7 @@ public function Analyze() {
 						$videomediaoffset += 4;
 						$thisfile_asf_videomedia_currentstream['format_data']['codec_data']       = substr($streamdata['type_specific_data'], $videomediaoffset);
 
-						if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) {
+						if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) { // @phpstan-ignore-line
 							foreach ($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'] as $dummy => $dataarray) {
 								if (isset($dataarray['flags']['stream_number']) && ($dataarray['flags']['stream_number'] == $streamnumber)) {
 									$thisfile_asf_videomedia_currentstream['bitrate'] = $dataarray['bitrate'];

external/getid3/getid3/module.audio-video.ivf.php

@@ -45,7 +45,7 @@ public function Analyze() {
 			$info['ivf']['header']['frame_count']          = getid3_lib::LittleEndian2Int(substr($IVFheader, 24, 4));
 			//$info['ivf']['header']['reserved']             =                              substr($IVFheader, 28, 4);
 
-			$info['ivf']['header']['frame_rate'] = (float) $info['ivf']['header']['timebase_numerator'] / $info['ivf']['header']['timebase_denominator'];
+			$info['ivf']['header']['frame_rate'] = (float)getid3_lib::SafeDiv($info['ivf']['header']['timebase_numerator'], $info['ivf']['header']['timebase_denominator']);
 
 			if ($info['ivf']['header']['version'] > 0) {
 				$this->warning('Expecting IVF header version 0, found version '.$info['ivf']['header']['version'].', results may not be accurate');
@@ -65,7 +65,7 @@ public function Analyze() {
 					$info['ivf']['frame_count']++;
 				}
 			}
-			if ($info['ivf']['frame_count']) {
+			if ($info['ivf']['frame_count'] && $info['playtime_seconds']) {
 				$info['playtime_seconds']    = $timestamp / 100000;
 				$info['video']['frame_rate'] = (float) $info['ivf']['frame_count'] / $info['playtime_seconds'];
 			}

external/getid3/getid3/module.audio-video.matroska.php

@@ -292,12 +292,12 @@ public function Analyze()
 						$track_info['display_x']    = (isset($trackarray['DisplayWidth']) ? $trackarray['DisplayWidth'] : $trackarray['PixelWidth']);
 						$track_info['display_y']    = (isset($trackarray['DisplayHeight']) ? $trackarray['DisplayHeight'] : $trackarray['PixelHeight']);
 
-						if (isset($trackarray['PixelCropBottom'])) { $track_info['crop_bottom'] = $trackarray['PixelCropBottom']; }
-						if (isset($trackarray['PixelCropTop']))    { $track_info['crop_top']    = $trackarray['PixelCropTop']; }
-						if (isset($trackarray['PixelCropLeft']))   { $track_info['crop_left']   = $trackarray['PixelCropLeft']; }
-						if (isset($trackarray['PixelCropRight']))  { $track_info['crop_right']  = $trackarray['PixelCropRight']; }
-						if (isset($trackarray['DefaultDuration'])) { $track_info['frame_rate']  = round(1000000000 / $trackarray['DefaultDuration'], 3); }
-						if (isset($trackarray['CodecName']))       { $track_info['codec']       = $trackarray['CodecName']; }
+						if (isset($trackarray['PixelCropBottom']))  { $track_info['crop_bottom'] = $trackarray['PixelCropBottom']; }
+						if (isset($trackarray['PixelCropTop']))     { $track_info['crop_top']    = $trackarray['PixelCropTop']; }
+						if (isset($trackarray['PixelCropLeft']))    { $track_info['crop_left']   = $trackarray['PixelCropLeft']; }
+						if (isset($trackarray['PixelCropRight']))   { $track_info['crop_right']  = $trackarray['PixelCropRight']; }
+						if (!empty($trackarray['DefaultDuration'])) { $track_info['frame_rate']  = round(1000000000 / $trackarray['DefaultDuration'], 3); }
+						if (isset($trackarray['CodecName']))        { $track_info['codec']       = $trackarray['CodecName']; }
 
 						switch ($trackarray['CodecID']) {
 							case 'V_MS/VFW/FOURCC':

external/getid3/getid3/module.audio-video.mpeg.php

@@ -505,9 +505,9 @@ public function Analyze() {
 			$last_GOP_id = max(array_keys($FramesByGOP));
 			$frames_in_last_GOP = count($FramesByGOP[$last_GOP_id]);
 			$gopdata = &$info['mpeg']['group_of_pictures'][$last_GOP_id];
-			$info['playtime_seconds'] = ($gopdata['time_code_hours'] * 3600) + ($gopdata['time_code_minutes'] * 60) + $gopdata['time_code_seconds'] + (($gopdata['time_code_pictures'] + $frames_in_last_GOP + 1) / $info['mpeg']['video']['frame_rate']);
+			$info['playtime_seconds'] = ($gopdata['time_code_hours'] * 3600) + ($gopdata['time_code_minutes'] * 60) + $gopdata['time_code_seconds'] + getid3_lib::SafeDiv($gopdata['time_code_pictures'] + $frames_in_last_GOP + 1, $info['mpeg']['video']['frame_rate']);
 			if (!isset($info['video']['bitrate'])) {
-				$overall_bitrate = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds'];
+				$overall_bitrate = getid3_lib::SafeDiv($info['avdataend'] - $info['avdataoffset'] * 8, $info['playtime_seconds']);
 				$info['video']['bitrate'] = $overall_bitrate - (isset($info['audio']['bitrate']) ? $info['audio']['bitrate'] : 0);
 			}
 			unset($info['mpeg']['group_of_pictures']);
@@ -610,14 +610,20 @@ public static function videoFramerateLookup($rawframerate) {
 	 * @return float
 	 */
 	public static function videoAspectRatioLookup($rawaspectratio, $mpeg_version=1, $width=0, $height=0) {
+		// Per http://forum.doom9.org/archive/index.php/t-84400.html
+		// 0.9157 is commonly accepted to mean 11/12 or .9166, the reciprocal of 12/11 (1.091) and,
+		// 1.0950 is commonly accepted to mean 11/10 or 1.1, the reciprocal of 10/11 (0.909)
 		$lookup = array(
-			1 => array(0, 1, 0.6735, 0.7031, 0.7615, 0.8055, 0.8437, 0.8935, 0.9157, 0.9815, 1.0255, 1.0695, 1.0950, 1.1575, 1.2015, 0),
+			1 => array(0, 1, 0.6735, 0.7031, 0.7615, 0.8055, 0.8437, 0.8935, 11/12, 0.9815, 1.0255, 1.0695, 11/10, 1.1575, 1.2015, 0),
 			2 => array(0, 1, 1.3333, 1.7778, 2.2100, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
 		);
 		$ratio = (float) (isset($lookup[$mpeg_version][$rawaspectratio]) ? $lookup[$mpeg_version][$rawaspectratio] : 0);
 		if ($mpeg_version == 2 && $ratio != 1 && $width != 0) {
 			// Calculate pixel aspect ratio from MPEG-2 display aspect ratio
 			$ratio = $ratio * $height / $width;
+		} else if ($mpeg_version == 1 && $ratio !== 0.0) {
+			// The MPEG-1 tables store the reciprocal of the pixel aspect ratio.
+			$ratio = 1.0 / $ratio;
 		}
 		return $ratio;
 	}