扩展:TimedMediaHandler

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MediaWiki扩展手册
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TimedMediaHandler
发布状态: 稳定版
Screenshot of TimedMediaHandler extension with Big Buck Bunny as background video.png
实现 媒体, API
描述 提供对于服务器端转码的集成支持,WebM、OGG Theora、Vorbis、Speex语音以及赋时文本
作者 Michael Dale, Jan Gerber, Tim Starling, James Heinrich, Brion Vibber, Derk-Jan Hartman
最新版本 0.6.0 (2018-11-07)
兼容性方针 发行分支
MediaWiki 1.29+
PHP 5.6+
数据庫更新
表格 transcode
许可协议 GNU通用公眾授權條款2.0或更新版本
下载
  • $wgMediaAudioTypes
  • $wgMediaVideoTypes
  • $wgWaitTimeForTranscodeReset
  • $wgEnableNiceBackgroundTranscodeJobs
  • $wgTmhEnableMp4Uploads
  • $wgUseFFmpeg2
  • $wgEnableTranscode
  • $wgTmhSoundfontLocation
  • $wgTmhWebPlayer
  • $wgTmhPriorityResolutionThreshold
  • $wgFFmpegVP9RowMT
  • $wgEnableIframeEmbed
  • $wgOggThumbLocation
  • $wgParserTestMediaHandlers
  • $wgTranscodeBackgroundSizeLimit
  • $wgTranscodeBackgroundTimeLimit
  • $wgTmhFluidsynthLocation
  • $wgTimedTextForeignNamespaces
  • $wgEnabledAudioTranscodeSet
  • $wgTmhFileExtensions
  • $wgEnabledTranscodeSet
  • $wgTmhUseBetaFeatures
  • $wgMinimumVideoPlayerSize
  • $wgFFmpegThreads
  • $wgMwEmbedModuleConfig
  • $wgTranscodeBackgroundMemoryLimit
  • $wgEnableLocalTimedText
  • $wgFFmpegLocation
  • $wgTmhPriorityLengthThreshold
  • $wgTimedTextNS
  • $wgTranscodeBackgroundPriority
  • transcode-reset
  • transcode-status
翻译TimedMediaHandler扩展如果在translatewiki.net可用
检查使用和版本矩阵。
问题 开放的工作 · 报告错误

TimedMediaHandler擴展允許您使用與image文件相同的語法在Wiki頁面中顯示音頻和視頻文件。 它包括Kaltura HTML5 Player和實驗性的VideoJS Player。 支持字幕和字幕(又稱定時文本)以及在多個WebM和其他派生工具以及許多其他功能之間的實時流切換。 TMH服務器端支持包括用於上傳HTML5音頻和視頻的選項,用於傳遞內容的多個轉碼配置文件,MIDI文件的回放,用於Ogg和WebM視頻的元數據解析,以及與MediaWiki的jobQueue系統集成以安排轉碼作業。

功能预览

查看Commons:Commons:Timed Text页面。

语法简介

image embed syntax基础上,Timed Media Handler支持:

[[File:Video.ogv|File:Video.ogv]]
用原尺寸显示一个视频。显示一个在视频中点提取的静止图像,和一个用来激活播放器的播放按钮。
[[File:Audio.oga|File:Audio.oga]]
为声音文件显示一个占位符,包含一个用于激活播放器的播放按钮。
[[File:Midi.mid]]
根據MIDI文件中的音樂指令生成數字音頻,並顯示嵌入式音頻播放器以播放此音頻。
[[File:Video.ogv|thumb]]
在一个浮动的缩略图里显示视频。
<gallery>File:Video.ogv</gallery>
在一个图片库(image gallery)里嵌入视频(每一个截图都会弹出一个用于完整视频的对话框)。
[[File:Video.ogg|thumbtime=1:25]]
用1分25秒的一帧画面插入视频作为占位图形。一个单独的数字将默认被理解成秒数。 也可以使用HH:MM:SS,例如1:02:22将是视频的1小时2分22秒。
[[File:Video.ogg|start=1:25]]
Temporal media fragments Displays a video clip starting at 1 minute 25 seconds into the video. A single number is taken as an offset in seconds. You can also include an end time of the form end=1:30 Which would result in a clip of 5 seconds playing from 1:25 to 1:30. If thumbtime is not provided, the start time will be used for the displayed thumbnail. 也可以使用HH:MM:SS,例如1:02:22将是视频的1小时2分22秒。
弃用
語法字noiconnoplayer已棄用,不起作用。 關鍵字disablecontrols可能會被棄用。 (请参见Task 135537) 它採用以下任何值的逗號分隔列表: options, timedText, fullscreen

客户端支持

示例视频播放器
示例音频播放器
音頻播放器更寬,顯示進度條

这个播放器在大部分现代浏览器上能够工作,支持IE9及更高版本(在MediaWiki's support matrix里有关于现代浏览器的描述)。 移动端支持情况不一,尤其是在iOS上。

自2015年8月起,TimedMediaHandler包括用於Ogg音頻/視頻的JavaScript兼容性代碼,可在Safari,Internet Explorer 10/11和Microsoft Edge瀏覽器中使用。

MediaWiki的第三方用戶可能還希望為Safari / IE / Edge中的本地視頻和音頻播放手動啟用MP4 H.264 / AAC支持,但是使用這些格式時,您可能需要MPEG-LA的專利許可才能進行互聯網廣播。

安装

You will want a recent version of ffmpeg in order to support encoding to WebM ( with the latest version of VP8). j^ supplies up-to-date static builds of ffmpeg with WebM support for major OSs at firefogg.org/nightly/. 有關舊版MediaWiki的安裝說明,請參見以下各節

  • 下载文件,并将其放置在您extensions/文件夹中的TimedMediaHandler目录内。
  • 将下列代码放置在您的LocalSettings.php的底部:
    // MediaWiki 1.31 and later
    wfLoadExtension( 'TimedMediaHandler' );
    $wgFFmpegLocation = '/usr/bin/ffmpeg'; // Most common ffmpeg path on Linux
    
  • 运行更新脚本,它将自动创建此扩展必须依赖的数据库表。
  • This extension requires Composer to install PHP dependencies. Go to the extension directory and run composer install --no-dev.
  • Configure as required.
  • You may need to increase the allowed memory in $wgMaxShellMemory .
  •   完成 – 在您的wiki上导航至Special:Version,以验证扩展已成功安装。

The extension will automatically add supported file types (except for mp4) to $wgFileExtensions , so you do not need to manually add video file types.

下載此擴展後,請注意,它需要Composer

所以,在从Git安装之后,切换到包含该扩展的目录。例如:"../extensions/TimedMediaHandler/"并运行composer install --no-dev,或在更新时:composer update --no-dev

或者最好将"extensions/TimedMediaHandler/composer.json"添加到在Wiki根目录下的"composer.local.json"文件中,例如:

{
	"extra": {
		"merge-plugin": {
			"include": [
				"extensions/TimedMediaHandler/composer.json"
			]
		}
	}
}

维基百科媒体编码选项的比较

See Extension:TimedMediaHandler/VP9 transition for deployment details on planned Wikimedia update from VP8 to VP9.

Sorted by bandwidth tier (grayed items are not currently enabled):

Bitrate Mbit/s WebM VP8 WebM VP9
Super Low 0.08 160p
Very Low 0.16 160p 240p
Low 0.25 240p 360p
Moderate 0.5 360p 480p
Medium 1.0 480p 720p
High 2.0 720p 1080p
Very high 4.0 1080p 1440p
Super high 8.0 2160p

详细选项:

名称 160P 240P 360P 480P 720P 1080P 160P 240P 360P 480P 720P 1080P 1440P 2160P
容器 WebM
视频 编码 VP8 VP9
最大宽度(像素) 288 426 640 854 1280 1920 288 426 640 854 1280 1920 2560 4096
最大高度(像素) 160 240 360 480 720 1080 160 240 360 480 720 1080 1440 2160
比特率 (Mbit/s) 0.16 0.25 0.5 1.0 2.0 4.0 0.08 0.16 0.25 0.5 1.0 2.0 4.0 8.0
音频 编码 Vorbis Opus
频道 2 (stereo) (pass-through)
采样率 (Hz) 44100 48000
品质 - 1 2 3 - (default)

配置

本部分已过时-请更新我

这里展示了一些可能有用的配置变量:

// The minimum size for an embed video player ( smaller than this size uses a pop-up player )
$wgMinimumVideoPlayerSize = 200;

// If transcoding is enabled for this wiki (if disabled, no transcode jobs are added and no
// transcode status is displayed). Note if remote embedding an asset we will still check if
// the remote repo has transcoding enabled and associated flavors for that media embed.
$wgEnableTranscode = true;

// The total amout of time a transcoding shell command can take:
$wgTranscodeBackgroundTimeLimit = 3600 * 8;
// Maximum amount of virtual memory available to transcoding processes in KB
$wgTranscodeBackgroundMemoryLimit = 2 * 1024 * 1024; // 2GB avconv, ffmpeg2theora mmap resources so virtual memory needs to be high enough
// Maximum file size transcoding processes can create, in KB
$wgTranscodeBackgroundSizeLimit = 3 * 1024 * 1024; // 3GB

// Number of threads to use in avconv for transcoding
$wgFFmpegThreads = 1;

// The NS for TimedText (registered on MediaWiki.org)
// https://www.mediawiki.org/wiki/Extension_namespace_registration
// Note commons pre-dates TimedMediaHandler and should set $wgTimedTextNS = 102 in LocalSettings.php
$wgTimedTextNS = 710;

// Set TimedText namespace for ForeignDBViaLBRepo on a per wikiID basis
// $wgTimedTextForeignNamespaces = array( 'commonswiki' => 102 );
$wgTimedTextForeignNamespaces = array();

/**
* Default enabled transcodes
*
* -If set to empty array, no derivatives will be created
* -Derivative keys encode settings are defined in WebVideoTranscode.php
*
* -These transcodes are *in addition to* the source file.
* -Only derivatives with smaller width than the source asset size will be created
* -Regardless of source size at least one WebM and Ogg source will be created from the $wgEnabledTranscodeSet
* -Derivative jobs are added to the MediaWiki JobQueue the first time the asset is uploaded
* -Derivative should be listed min to max
*/
// Starting from 1.31
// All valid string values are listed in the extension's extension.json file 
$wgEnabledTranscodeSet = [
    '160p.webm' => true,
    '240p.webm' => true,
    '360p.webm' => true,
    '480p.webm' => true,
    '720p.webm' => true,
    '1080p.webm' => true,
];

$wgEnabledAudioTranscodeSet = [
    'vorbis' => true,
    'mp3' => true,
];

// If mp3 source assets can be ingested:
$wgTmhEnableMp3Uploads = true;

// If mp4 source assets can be ingested:
$wgTmhEnableMp4Uploads = false;

如果需要转码,请确认你的$wgMaxShellMemory, $wgMaxShellTime, $wgMaxShellFileSize足够大而保证转码工作进行并保存输出。默认值很可能太小了。

进行转码工作

由于转码工作是资源集中型工作,它们不会再常规工作队列中运行 ( 查看 bug 29336 ) 。取而代之的是,它们必须在--类型变量里被要求。

php maintenance/runJobs.php --type webVideoTranscode

如果運行此命令使其永久掛起,則可能需要在LocalSettings.php中設置$wgTranscodeBackgroundTimeLimit = 0;。 参见任务T206957

编码节点

为了能够转码许多视频,你可能想要运行多个连接到主数据库并且直接访问你的文件的编码节点。如果你在使用ubuntu lucid (10.04) ,你需要添加[$launchpad this ppa]并且安装php5-cli php-pear imagemagick ffmpeg ffmpeg2theora。

在Debian和Ubuntu下的最小安装

apt install ffmpeg

Plus, add this to your LocalSettings.php (tested for Devuan ASCII only):

$wgFFmpegLocation = '/usr/bin/ffmpeg';

On older versions of MediaWiki (1.29–1.31)

  • 對於系統管理員而言,版本1.31已被破壞。 The extension now requires wfLoadExtension, dropped the dependency for the MwEmbedSupport extension, and the WebVideoTranscode PHP constants are now expressed as string values instead.
  • Note that, although MwEmbedSupport was included in TimedMediaHandler for MediaWiki 1.31 and later, for MediaWiki versions prior to that you will need to download it from the archive page.

In LocalSettings.php, load the extension with:

// MediaWiki 1.27 - 1.30
wfLoadExtension( 'MwEmbedSupport' );
require_once "$IP/extensions/TimedMediaHandler/TimedMediaHandler.php";

// TimedMediaHandler依赖于mwEmbedSupport直到1.30
// MediaWiki 1.27 and earlier
require_once "$IP/extensions/MwEmbedSupport/MwEmbedSupport.php";
require_once "$IP/extensions/TimedMediaHandler/TimedMediaHandler.php";

Prior to 1.31, $wgEnabledTranscodeSet is set with:

// Before 1.31
$wgEnabledTranscodeSet = [
    WebVideoTranscode::ENC_WEBM_160P,
    WebVideoTranscode::ENC_WEBM_240P,
    WebVideoTranscode::ENC_WEBM_360P,
    WebVideoTranscode::ENC_WEBM_480P,
    WebVideoTranscode::ENC_WEBM_720P,
    WebVideoTranscode::ENC_WEBM_1080P
];

$wgEnabledAudioTranscodeSet = [
    WebVideoTranscode::ENC_OGG_VORBIS,
    WebVideoTranscode::ENC_MP3,
];

Troubleshooting

本部分需要擴展
"ffmpeg – failed to map segment from shared object"
You need to increase the allowed memory in $wgMaxShellMemory .
"Class 'getID3' not found"
You need to install the extension's PHP dependencies using Composer, see the Installation section above.