Stato della release: stabile
|Descrizione||Provides integrated support for server side transcoding, WebM, Ogg Theora, Vorbis, MP3, Speex and Timed Text|
|Autore(i)||Michael Dale, Jan Gerber, Tim Starling, James Heinrich, Brion Vibber, Derk-Jan Hartman|
|Compatibility policy||release branches|
|Cambi della base di dati||Sì|
|Licenza||GNU General Public License 2.0 or later|
Traducete l'estensione TimedMediaHandler se è disponibile su translatewiki.net
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The TimedMediaHandler extension allows you to display audio and video files in wiki pages, using the same syntax as for image files. It includes the Kaltura HTML5 Player and an experimental VideoJS Player. There is support for subtitles and captions (aka Timed Text) and real time stream switching between multiple WebM and other derivatives and many other features. TMH server side support includes options for uploading HTML5 audio and video, multiple transcode profiles to deliver content, Metadata parsing for Ogg and WebM videos and integrates with MediaWiki's jobQueue system for scheduling transcoding jobs.
See Commons:Commons:TimedText page.
In addition to the image embed syntax, Timed Media Handler supports:
- Display a video at its nominal size. Displays a still image from the midpoint with a play button to start an embedded player.
- Show a placeholder for a sound file, with a play button to start an embedded player.
- Show a video in a floating thumbnail box
- Show a video embedded in an image gallery ( each clip will popup a dialog for the full player )
- Use a frame from 1 minute 25 seconds into the video as the placeholder image. A single number is taken as an offset in seconds.
- 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=1:30Which 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.
- The syntax words noicon and noplayer are deprecated and do not function. The keyword disablecontrols will likely be deprecated soon. It takes the following values: options, timedText, fullscreen
The player works on most modern browsers and supports IE9 and later (The modern browsers as described in MediaWiki's support matrix). Mobile support is spotty, especially on iOS.
Third-party users of MediaWiki may also wish to manually enable MP4 H.264/AAC support for native video and audio playback in Safari/IE/Edge, but when using these formats you may need a patent license from MPEG-LA for internet broadcasting.
Also see the README for detailed install instructions.
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/
- Download and place the file(s) in a directory called
- Add the following code at the bottom of your LocalSettings.php:
// TimedMediaHandler is dependent on mwEmbedSupport // MediaWiki 1.27 or earlier require_once "$IP/extensions/MwEmbedSupport/MwEmbedSupport.php"; // After MediaWiki 1.27 wfLoadExtension( 'MwEmbedSupport' ); // TimedMediaHandler require_once "$IP/extensions/TimedMediaHandler/TimedMediaHandler.php";
- Run the update script which will automatically create the necessary database tables that this extension needs.
- Configure as required.
- Done - Navigate to Special:Version on your wiki to verify that the extension is successfully installed.
The extension will automatically add supported file types (except mp4) to $wgFileExtensions, so you do not need to manually add video file types.
Comparison of Wikipedia media encoding options
Sorted by bandwidth tier (grayed items are not currently enabled):
|Bitrate||Mbit/s||WebM VP8||WebM VP9|
|Max width (pixels)||288||426||640||854||1280||1920||288||426||640||854||1280||1920||2560||4096|
|Max height (pixels)||160||240||360||480||720||1080||160||240||360||480||720||1080||1440||2160|
|Sampling rate (Hz)||44100||48000|
Here are some configuration variables which may be useful:
// 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 */ $wgEnabledTranscodeSet = array( 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 = array( WebVideoTranscode::ENC_OGG_VORBIS, WebVideoTranscode::ENC_MP3, ); // If mp3 source assets can be ingested: $wgTmhEnableMp3Uploads = true; // If mp4 source assets can be ingested: $wgTmhEnableMp4Uploads = false;
For transcoding, make sure you have $wgMaxShellMemory, $wgMaxShellTime, $wgMaxShellFileSize are large enough to allow encoding jobs to run and save output. Default values are most likely too low.
Running transcode jobs
Because transcode jobs are resource intensive they will not run as part of normal job queue ( see bug 29336 ) Instead they must be requested by the --type argument:
php maintenance/runJobs.php --type webVideoTranscode
To be able to transcode many videos you might want to run multiple encoding nodes that connect to the master db and access your file store directly. You will need to install ffmpeg.
Minimal install under Ubuntu 16.04
apt-get install ffmpeg
- Add support for transcoding from arbitrary format uploads.
- Improve mobile support for uploading and playback ( via native aps if the browser html5 support does not include WebM )
- Add support for WebM flattening of edited sequences
- Add support for 8k videos
- Upgrade to 2.x branch. (On hold. Planning on switching to video.js.)
- Change Kaltura player to Video.js as our main video player.
- Consistent mobile support
- MPEG-DASH adaptive streaming
- "GIF mode" for autoplay silent videos
- MIDI input support
- Better internal interface for connecting to Score, other extensions
These notes about the status of TimedMediaHandler were shared by Jan Gerber at the end of his consulting agreement for WMF on 27 September, 2013:
Since you asked in the last meeting to write up an overview of the current state of TimedMediaHandler, here we go:
- setup like jobrunners, but only processing video transcode jobs (configuration of jobs/memory/threads in puppet and wikimedia-config)
- extract frames from videos, using avconv for all videos reading videos via http from swift backend
- proxy caches:
- must support HTTP 206 Range Requests for video urls (currently requires custom code that is managed in puppet)
- custom packages for video transcoding (apt.wikimedia.org):
- ffmpeg2theora (new upstream version to reduce memory by only using one thread)
- libav (ubuntu version with patch to fix memory leak in ogg decoder)
- libvpx (new upstream version fixing various issues and quality improvements)
- custom packages for image scaling (apt.wikimedia.org):
- vips (new upstream version addressing various performance issues)
- Upstream coded included in TMH:
- mwEmbed (https://github.com/kaltura/mwEmbed) has local changes needs to be merged during next update
- PEAR File_Ogg (http://pear.php.net/package/File_Ogg) has local changes was part of OggHandler, Tim is upstream maintainer
- getID3 (http://getid3.org) has small local changes but merged upstream
- Statistics and monitoring:
- Transcoding queue and errors:
- Ganglia for video scalers:
August 2015 update
Brion and TheDJ are starting up some new maintenance on TImedMediaHandler:
- fixed some regressions in transcode handling
- increasing Ogg transcode quality (increased bandwidth)
- support subtitles in ogv.js
- finish killing broken Cortado Java compatibility shim
- retooling TMH's ResourceLoader modules for better compatibility
- fix ogv.js issues
- missing volume control
- fix more transcode issues
- get transcoding from VP9/Opus working on Wikimedia servers...
- transcoding to VP9/Opus WebM with decreased bandwidth
- add Ogg skeleton to ogg audio transcodes for better seeking
- integrate lightweight video player into Extension:MobileFrontend
- rework serving Timed Text
- replace Kaltura player with VideoJS
- integrate video player into Extension:MultimediaViewer
- integrate audio/video into Extension:VisualEditor
- DASH or DASH-like adaptive streaming
- get VP9 working fast enough on ogv.js to replace Ogg Theora transcodes
|This extension is being used on one or more Wikimedia projects. This probably means that the extension is stable and works well enough to be used by such high-traffic websites. Look for this extension's name in Wikimedia's CommonSettings.php and InitialiseSettings.php configuration files to see where it's installed. A full list of the extensions installed on a particular wiki can be seen on the wiki's Special:Version page.|