BxDolTranscoderVideo Class Reference

Inheritance diagram for BxDolTranscoderVideo:

Public Member Functions
	isMimeTypeSupported ($sMimeType)
	getFileUrlNotReady ($mixedHandler)
	getSize ($sFile)
Public Member Functions inherited from BxDolTranscoder
	onDeleteFileLocal ($iFileId)
	onDeleteFileOrig ($mixedHandler)
	registerHandlers ()
	unregisterHandlers ()
	cleanup ()
	getStorage ()
	getDb ()
	isMimeTypeSupported ($sMimeType)
	getFileUrl ($mixedHandler)
	getFileUrlById ($mixedHandler)
	isFileReady ($mixedHandler, $isCheckOutdated=true)
	transcode ($mixedHandler, $iProfileId=0)
	prune ()
	getFileUrlNotReady ($mixedHandler)
	getFilterParams ($sName)

Protected Member Functions
	applyFilter_Poster ($sFile, $aParams)
	applyFilter_Mp4 ($sFile, $aParams)
	applyFilter_Webm ($sFile, $aParams)
	_convertVideo ($sFile, $sFileOut, $sExt, $aParams, $aOptions)
	_getOptionSizeForVideo ($sFile, $aParams)
Protected Member Functions inherited from BxDolTranscoder
	__construct ($aObject, $oStorage)

Additional Inherited Members
Static Public Member Functions inherited from BxDolTranscoder
static	getObjectInstance ($sObject)
static	pruning ()
static	processQueue ($bQueuePruning=true)
static	processCompleted ()
static	registerHandlersArray ($mixed)
static	registerHandlersSystem ()
static	unregisterHandlersArray ($mixed)
static	cleanupObjectsArray ($mixed)
static	onAlertResponseFileDeleteLocal ($oAlert, $sObject)
static	onAlertResponseFileDeleteOrig ($oAlert, $sObject)
Static Protected Member Functions inherited from BxDolTranscoder
static	getTranscoderObjects ()

Detailed Description

This class transcodes videos and generates video thumbnails.

To generate video which plays in all moders browsers along with video poster, you need to create 3 different video transcoding objects which will generate .mp4, .webm videos and video poster. Video is converting upon first access, so it is probably better to force video conversion by calling

See also

BxDolTranscoderVideo::getFileUrl just after video uploading. Video for conversion is queued and when cron is run video conversion is performed. While video is pending for conversion or in the process then

BxDolTranscoderVideo::getFileUrl methods returns empty string for video and predefined image for video poster.

Transcoder object and other params are the same as in

See also

BxDolTranscoderImage, but it is highly recommended to disable 'atime_pruning' and 'atime_tracking', or set it to fairly big value, since video transcoding is not performed on the fly and takes some time.

Video conversion can be performed on separate server or multiple servers, to do it:

• install the script on separate server(s), but connect to the same DB which your main site is using
• enable 'sys_transcoder_queue_files' option (when it is enabled it takes a little longer to convert videos)
• add the following code to the begining of inc/header.inc.php file on the main site, where your actual site in installed:

  define('BX_TRANSCODER_PROCESS_COMPLETED', '');

• if you don't want your main site to convert videos, so all conversion will be performed on the separate server, add the following code to the begining of inc/header.inc.php file on the main site:

  define('BX_TRANSCODER_NO_TRANSCODING', '');

• all servers must have different host name
• only main server must be used as site, additional sites are just for video conversion, don't perform any action on these sites

Available filters:

• Mp4 - this filter convert video into .mp4 format along with resizing, the parameters are the following:
  • h - height of resulted video (360px by default), for video it is highly recommended to specify only height parameter (without width parameter)
  • video_bitrate - video bitrate (512k by default)
  • audio_bitrate - video bitrate (128k by default)
  • ffmpeg_options - additional command line options for ffmepeg, as key => value array (empty by default)
• Webm - this filter convert video into .webm format along with resizing, the parameters are the same as for Mp4 filter
• Poster - this filter generates video thumbnail, it tries to get poster at 0, 3 and 5 seconds from the beginning, it gets first not fully black/white thumb

Example of usage:

// transcoder objects which generate .mp4, .webm videos and image poster
$oTranscoderMp4 = BxDolTranscoder::getObjectInstance('bx_video_mp4'); 
$oTranscoderWebm = BxDolTranscoder::getObjectInstance('bx_video_webm');
$oTranscoderPoster = BxDolTranscoder::getObjectInstance('bx_video_poster');

// make sure to call it only once (for example: during module installation), before the first usage, no need to call it every time
$oTranscoderMp4->registerHandlers(); 
$oTranscoderWebm->registerHandlers(); 
$oTranscoderPoster->registerHandlers(); 

// get URLs of transcoded videos and video thumbnail, 33 is ID of original video file stored in specified storage object
$sUrlMp4 = $oTranscoderMp4->getFileUrl(33);
$sUrlWebM = $oTranscoderWebm->getFileUrl(33);
$sUrlPoster = $oTranscoderPoster->getFileUrl(33);

echo 'My cat:' . BxTemplFunctions::getInstance()->videoPlayer($sUrlPoster, $sUrlMP4, $sUrlWebM); 

Also

See also

transcoder_videos sample for complete example.

Member Function Documentation

_convertVideo()

BxDolTranscoderVideo::_convertVideo (   $sFile,   $sFileOut,   $sExt,   $aParams,   $aOptions  )

protected

Convert video using ffmpeg binary. Video conversion otput is written to the 'log' variable.

Parameters

$sFile	input file for conversion
$sFileOut	output file for conversion, can be the same as input file
$sExt	output file extension, in the format '.ext'
$aParams	filter params
$aOptions	ffmpeg options as array

Returns

false on error, or true on success

_getOptionSizeForVideo()

BxDolTranscoderVideo::_getOptionSizeForVideo (   $sFile,   $aParams  )

protected

Get output video size as 'WxH' string. It check filter params for 'w' and 'h' options and original video ratio and return the resulted video size.

• If only height specified in params (desired behavior) or no width or height is specified (default height is 360), then width is automatically calculated using original video size ratio.
• If only width specified in params, then height is automatically calculated using original video size ratio.
• If width and height specified in params then these values are returned, but the resulted video size can be unproportionate.

  Parameters

  $sFile	original video file path (to check original video size ratio)
  $aParams	filter params

  Returns

  WxH string

applyFilter_Mp4()

BxDolTranscoderVideo::applyFilter_Mp4 (   $sFile,   $aParams  )

protected

Convert video to .mp4 format

applyFilter_Poster()

BxDolTranscoderVideo::applyFilter_Poster (   $sFile,   $aParams  )

protected

Convert video to .jpg format - video poster

applyFilter_Webm()

BxDolTranscoderVideo::applyFilter_Webm (   $sFile,   $aParams  )

protected

Convert video to .webm format

getFileUrlNotReady()

BxDolTranscoderVideo::getFileUrlNotReady

(

$mixedHandler

)

If video isn't processed yet then empty string is returned for video, or predefined image is returned for video poster

getSize()

BxDolTranscoderVideo::getSize

(

$sFile

)

Get video size. It generated image from the video and returns size of the image.

Parameters

$sFile

path to the video file

Returns

array where 'w' key is width and 'h' key is height

isMimeTypeSupported()

BxDolTranscoderVideo::isMimeTypeSupported

(

$sMimeType

)

check if transcoder suppors given file mime type

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

• inc/classes/BxDolTranscoderVideo.php