ilFFmpeg Class Reference

FFmpeg wrapper. More...

Collaboration diagram for ilFFmpeg:

Public Member Functions
	getPossibleTargetMimeTypes ($a_source_mime_type)
	Get possible target formats. More...
	exec ($args)
	Execute ffmpeg. More...
	getFileInfo ()
	Get file info. More...
	getLastReturnValues ()
	Get last return values. More...

Static Public Member Functions
static	enabled ()
	Checks, whether FFmpeg support is enabled (path is set in the setup) More...
static	getTargetMimeTypes ()
	Get target mime types. More...
static	getSourceMimeTypes ()
	Get source mime types. More...
static	supportsImageExtraction ($a_mime)
	Check if mime type supports image extraction. More...
static	getSupportedCodecsInfo ()
	Get all supported codecs. More...
static	getSupportedFormatsInfo ()
	Get all supported formats. More...
static	convert ($a_file, $a_target_mime, $a_target_dir="", $a_target_filename="")
	Convert file to target mime type. More...
static	extractImage ($a_file, $a_target_filename, $a_target_dir="", $a_sec=1)
	Extract image from video file. More...

Static Public Attributes
static	$formats
	Formats handled by ILIAS. More...
static	$last_return = array()

Static Private Member Functions
static	getCmd ()
	Get ffmpeg command. More...

Detailed Description

FFmpeg wrapper.

Author

Alex Killing alex..nosp@m.kill.nosp@m.ing@g.nosp@m.mx.d.nosp@m.e

Version

$Id$ /

Definition at line 12 of file class.ilFFmpeg.php.

Member Function Documentation

convert()

static ilFFmpeg::convert (   $a_file,   $a_target_mime,   $a_target_dir = "",   $a_target_filename = ""  )

static

Convert file to target mime type.

Parameters

string	$a_file	source file (full path included)
string	$a_target_mime	target mime type
string	$a_target_dir	target directory (no trailing "/")
string	$a_target_filename	target file name (no path!)

Returns

string new file (full path)

Definition at line 203 of file class.ilFFmpeg.php.

        {
                return; // currently not supported
 
                if (self::$formats[$a_target_mime]["target"] != true)
                {
                        include_once("./Services/MediaObjects/exceptions/class.ilFFmpegException.php");
                        throw new ilFFmpegException("Format ".$a_target_mime." is not supported");
                }
                $pars = self::$formats[$a_target_mime]["parameters"];
                $spi = pathinfo($a_file);
                
                // use source directory if no target directory is passed
                $target_dir = ($a_target_dir != "")
                        ? $a_target_dir
                        : $spi['dirname'];
                        
                // use source filename if no target filename is passed
                $target_filename = ($a_target_filename != "")
                        ? $a_target_filename
                        : $spi['filename'].".".self::$formats[$a_target_mime]["suffix"];
                
                $target_file = $target_dir."/".$target_filename;
                
                $cmd = "-y -i ".ilUtil::escapeShellArg($a_file)." ".$pars." ".ilUtil::escapeShellArg($target_file);
 
                $ret = self::exec($cmd." 2>&1");
                self::$last_return = $ret;
                
                if (is_file($target_file))
                {
                        return $target_file;
                }
                else
                {
                        include_once("./Services/MediaObjects/exceptions/class.ilFFmpegException.php");
                        throw new ilFFmpegException("It was not possible to convert file ".basename($a_file).".");
                }
                //ffmpeg -i MOV012.3gp -vcodec libx264 -strict experimental -acodec aac -sameq -ab 64k -ar 44100 MOV012.mp4
        }

References $cmd, $ret, ilUtil\escapeShellArg(), and exec().

Referenced by ilObjMediaCastGUI\convertFileObject().

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enabled()

static ilFFmpeg::enabled ( )

static

Checks, whether FFmpeg support is enabled (path is set in the setup)

Parameters

return

Definition at line 51 of file class.ilFFmpeg.php.

        {
                if (defined("PATH_TO_FFMPEG") && PATH_TO_FFMPEG != "")
                {
                        return true;
                }
                return false;
        }

Referenced by ilObjMediaCastGUI\editCastItemObject(), and ilDataCollectionDatatype\parseValue().

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exec()

ilFFmpeg::exec

(

$args

)

Execute ffmpeg.

Parameters

return

Definition at line 152 of file class.ilFFmpeg.php.

        {
                return ilUtil::execQuoted(self::getCmd(), $args);
        }

References ilUtil\execQuoted().

Referenced by convert(), extractImage(), getSupportedCodecsInfo(), and getSupportedFormatsInfo().

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extractImage()

static ilFFmpeg::extractImage (   $a_file,   $a_target_filename,   $a_target_dir = "",   $a_sec = 1  )

static

Extract image from video file.

Parameters

string	$a_file	source file (full path included)
string	$a_target_dir	target directory (no trailing "/")
string	$a_target_filename	target file name (no path!)

Returns

string new file (full path)

Definition at line 264 of file class.ilFFmpeg.php.

        {
//echo "-$a_file-$a_target_filename-$a_target_dir-$a_sec-<br>";
 
                $spi = pathinfo($a_file);
                
                // use source directory if no target directory is passed
                $target_dir = ($a_target_dir != "")
                        ? $a_target_dir
                        : $spi['dirname'];
                
                $target_file = $target_dir."/".$a_target_filename;
                
                $sec = (int) $a_sec;
                $cmd = "-y -i ".ilUtil::escapeShellArg($a_file)." -r 1 -f image2 -vframes 1 -ss ".$sec." ".ilUtil::escapeShellArg($target_file);
//echo "-$cmd-"; exit;
                $ret = self::exec($cmd." 2>&1");
                self::$last_return = $ret;
                
                if (is_file($target_file))
                {
                        return $target_file;
                }
                else
                {
                        include_once("./Services/MediaObjects/exceptions/class.ilFFmpegException.php");
                        throw new ilFFmpegException("It was not possible to extract an image from ".basename($a_file).".");
                }
        }

References $cmd, $ret, ilUtil\escapeShellArg(), and exec().

Referenced by ilObjMediaCastGUI\extractPreviewImageObject(), and ilDataCollectionDatatype\parseValue().

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getCmd()

static ilFFmpeg::getCmd ( )

staticprivate

Get ffmpeg command.

Definition at line 141 of file class.ilFFmpeg.php.

        {
                return PATH_TO_FFMPEG;
        }

getFileInfo()

ilFFmpeg::getFileInfo

(

)

Get file info.

Parameters

return

Definition at line 187 of file class.ilFFmpeg.php.

        {
                //$info = `ffmpeg -i $path$file 2>&1 /dev/null`;
                //@fields = split(/\n/, $info);
        }

getLastReturnValues()

ilFFmpeg::getLastReturnValues

(

)

Get last return values.

Parameters

return

Definition at line 250 of file class.ilFFmpeg.php.

        {
                return self::$last_return;
        }

References $last_return.

Referenced by ilObjMediaCastGUI\convertFileObject(), and ilObjMediaCastGUI\extractPreviewImageObject().

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getPossibleTargetMimeTypes()

ilFFmpeg::getPossibleTargetMimeTypes

(

$a_source_mime_type

)

Get possible target formats.

Parameters

return

Definition at line 121 of file class.ilFFmpeg.php.

        {
                $pt = array();
                if (in_array($a_source_mime_type, self::getSourceMimeTypes()))
                {
                        foreach (self::getTargetMimeTypes() as $tm)
                        {
                                if ($tm != $a_source_mime_type)
                                {
                                        $pt[$tm] = $tm;
                                }
                        }
                }
                return $pt;
        }

getSourceMimeTypes()

static ilFFmpeg::getSourceMimeTypes ( )

static

Get source mime types.

Parameters

return

Definition at line 88 of file class.ilFFmpeg.php.

        {
                $ttypes = array();
                foreach (self::$formats as $k => $f)
                {
                        if ($f["source"] == true)
                        {
                                $ttypes[] = $k;
                        }
                }
                return $ttypes;
        }

getSupportedCodecsInfo()

static ilFFmpeg::getSupportedCodecsInfo ( )

static

Get all supported codecs.

Returns

Definition at line 162 of file class.ilFFmpeg.php.

        {
                $codecs = self::exec("-codecs");
                
                return $codecs;
        }

References exec().

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getSupportedFormatsInfo()

static ilFFmpeg::getSupportedFormatsInfo ( )

static

Get all supported formats.

Returns

Definition at line 174 of file class.ilFFmpeg.php.

        {
                $formats = self::exec("-formats");
                
                return $formats;
        }

References $formats, and exec().

Referenced by ilObjMediaObjectGUI\showVideoToolObject().

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getTargetMimeTypes()

static ilFFmpeg::getTargetMimeTypes ( )

static

Get target mime types.

(Please note, that we do not list all possible encoders here, only the ones that are desired for the use in ILIAS)

Parameters

return

Definition at line 69 of file class.ilFFmpeg.php.

        {
                $ttypes = array();
                foreach (self::$formats as $k => $f)
                {
                        if ($f["target"] == true)
                        {
                                $ttypes[] = $k;
                        }
                }
                return $ttypes;
        }

supportsImageExtraction()

static ilFFmpeg::supportsImageExtraction (   $a_mime )

static

Check if mime type supports image extraction.

Parameters

string

$a_mime

mime type

Definition at line 106 of file class.ilFFmpeg.php.

        {
                if (in_array($a_mime, self::getSourceMimeTypes()))
                {
                        return true;
                }
                return false;
        }

Referenced by ilObjMediaCastGUI\editCastItemObject(), and ilDataCollectionDatatype\parseValue().

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Field Documentation

$formats

ilFFmpeg::$formats

static

Initial value:

= array(
                "video/3pgg" => array(
                        "source" => true,
                        "target" => false
                        ),
                "video/x-flv" => array(
                        "source" => true,
                        "target" => false
                        ),
                "video/mp4" => array(
                        "source" => true,
                        "target" => true,
                        "parameters" => "-vcodec libx264 -strict experimental -acodec aac -sameq -ab 56k -ar 48000",
                        "suffix" => "mp4"
                        ),
                "video/webm" => array(
                        "source" => true,
                        "target" => true,
                        "parameters" => "-strict experimental -vcodec libvpx -acodec vorbis -ac 2 -sameq -ab 56k -ar 48000",
                        "suffix" => "webm"
                        )
                )

Formats handled by ILIAS.

Note: In general the mime types do not reflect the complexity of media container/codec variants. For source formats no specification is needed here. For target formats we use fixed parameters that should result in best web media practice.

Definition at line 20 of file class.ilFFmpeg.php.

Referenced by getSupportedFormatsInfo().

$last_return

ilFFmpeg::$last_return = array()

static

Definition at line 43 of file class.ilFFmpeg.php.

Referenced by getLastReturnValues().

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The documentation for this class was generated from the following file:

• Services/MediaObjects/classes/class.ilFFmpeg.php