Difference between revisions of "Video documents"

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(Server Settings)
Line 10: Line 10:
 
*http://bazaar.eprints.org/454/ (YouTube Importer)
 
*http://bazaar.eprints.org/454/ (YouTube Importer)
 
*http://files.eprints.org/773/ (Kultur)
 
*http://files.eprints.org/773/ (Kultur)
 +
 +
==Video Transcoding by EPrints/FFMPEG==
 +
Are there particular video codecs/containers recommended for the streaming/seeking to work (H264 in MP4 container)?
 +
EPrints performs the following tasks when generating "thumbnails" for videos, using FFMPEG:
 +
*generate an image thumbnail
 +
*transcode video to ogg container
 +
*transcode video to mp4 container
 +
 +
==Video Document Integration==
 +
Should the video player be integrated as an iframe embed code, document "preview" or as a part of the eprint_render?  Most recent version of EdShare generates a video player directly on the abstract page, rather than a document "preview".  It is also possible to embed a video player (typically with an iframe) to stream content from another site, like YouTube and Vimeo.
  
 
==Video Players==
 
==Video Players==
 
Depositors can upload video documents.  Since EPrints 3.3, there is a lightbox/flowplayer in EPrints, under /lib/static/.  However, EPrints does not embed any video player as a "preview" thumbnail or on the abstract page.  To generate a video player for a document in EPrints, the Kultur plugin (http://files.eprints.org/773/) can be used to extend the preview with a video player.
 
Depositors can upload video documents.  Since EPrints 3.3, there is a lightbox/flowplayer in EPrints, under /lib/static/.  However, EPrints does not embed any video player as a "preview" thumbnail or on the abstract page.  To generate a video player for a document in EPrints, the Kultur plugin (http://files.eprints.org/773/) can be used to extend the preview with a video player.
 +
 +
===Video.js Integration===
 +
One solution is to integrate video.js with EPrints.
 +
Following these instructions: http://videojs.com/getting-started/
 +
Integration involves adding the following to the <head> of the template (globally, in /archives/ARCHIVEID/lang/LANGID/templates/default.xml)
 +
 +
<source lang="html5">
 +
<link href="http://vjs.zencdn.net/5.11.7/video-js.css" rel="stylesheet"/>
 +
<!-- If you'd like to support IE8 -->
 +
<script src="http://vjs.zencdn.net/ie8/1.1.2/videojs-ie8.min.js"></script>
 +
</source>
 +
 +
and the following right before the last closing </body> tag:
 +
 +
<source lang="html5">
 +
<script src="http://vjs.zencdn.net/5.11.7/video.js"></script>
 +
</source>
 +
 +
Generating the video player can be done in eprint_render.pl, as follows:
 +
 +
<source lang="perl">
 +
#TN - render a video.js player for video documents
 +
%files = $doc->files;
 +
my $type = "";
 +
my $videoDiv = $session->make_element( "div" );
 +
foreach my $file ( keys %files )
 +
{
 +
$type = $doc->get_type;
 +
 +
if ($type eq "video"){
 +
my $video_preview_image = $doc->thumbnail_url("preview");
 +
my $videomimetype_1="video/mp4";
 +
my $video_preview_1 = $doc->thumbnail_url("video_mp4");
 +
my $videomimetype_2="video/ogg";
 +
my $video_preview_2 = $doc->thumbnail_url("video_ogg");
 +
 +
if ($video_preview_1 || $video_preview_2){
 +
  my $videoplayer = $session->make_element( "video", id=>"my-video", class=>"video-js", controls=>"", preload=>"auto", poster=>$video_preview_image, 'data-setup'=>"{}" );
 +
  if ($video_preview_1){
 +
  my $source_1 = $session->make_element ("source", src=>$video_preview_1, type=>$videomimetype_1);
 +
  $videoplayer->appendChild( $source_1 );
 +
  }
 +
if ($video_preview_2){
 +
my $source_2 = $session->make_element ("source", src=>$video_preview_2, type=>$videomimetype_2);
 +
$videoplayer->appendChild( $source_2 );
 +
}
 +
  my $nojsP = $session->make_element ("p", class=>"vjs-no-js");
 +
my $nojstext = "To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video";
 +
$nojsP->appendChild( $session->make_text( $nojstext) );
 +
$videoplayer->appendChild( $nojsP );
 +
$videoDiv->appendChild($videoplayer);
 +
}
 +
}
 +
}
 +
#$videoDiv now holds the video player, and can be added to the page with appendChild($videoDiv)
 +
</source>
  
 
==Server Settings==
 
==Server Settings==
Line 21: Line 87:
 
ffmpeg should be installed on the server.
 
ffmpeg should be installed on the server.
 
On some servers (Ubuntu), 'libx264' needs to be installed for the H264 codec.
 
On some servers (Ubuntu), 'libx264' needs to be installed for the H264 codec.
 
==Video Transcoding by EPrints/FFMPEG==
 
Are there particular video codecs/containers recommended for the streaming/seeking to work (H264 in MP4 container)?
 
EPrints performs the following tasks when generating "thumbnails" for videos, using FFMPEG:
 
*generate an image thumbnail
 
*transcode video to ogg container
 
*transcode video to mp4 container
 
 
==Video Document Integration==
 
Should the video player be integrated as an iframe embed code, document "preview" or as a part of the eprint_render?  Most recent version of EdShare generates a video player directly on the abstract page, rather than a document "preview".  It is also possible to embed a video player (typically with an iframe) to stream content from another site, like YouTube and Vimeo.
 

Revision as of 19:53, 14 October 2016


This page is in development and will eventually contain information about supporting Video documents in EPrints.

Related Pages

Video Transcoding by EPrints/FFMPEG

Are there particular video codecs/containers recommended for the streaming/seeking to work (H264 in MP4 container)? EPrints performs the following tasks when generating "thumbnails" for videos, using FFMPEG:

  • generate an image thumbnail
  • transcode video to ogg container
  • transcode video to mp4 container

Video Document Integration

Should the video player be integrated as an iframe embed code, document "preview" or as a part of the eprint_render? Most recent version of EdShare generates a video player directly on the abstract page, rather than a document "preview". It is also possible to embed a video player (typically with an iframe) to stream content from another site, like YouTube and Vimeo.

Video Players

Depositors can upload video documents. Since EPrints 3.3, there is a lightbox/flowplayer in EPrints, under /lib/static/. However, EPrints does not embed any video player as a "preview" thumbnail or on the abstract page. To generate a video player for a document in EPrints, the Kultur plugin (http://files.eprints.org/773/) can be used to extend the preview with a video player.

Video.js Integration

One solution is to integrate video.js with EPrints. Following these instructions: http://videojs.com/getting-started/ Integration involves adding the following to the <head> of the template (globally, in /archives/ARCHIVEID/lang/LANGID/templates/default.xml)

<link href="http://vjs.zencdn.net/5.11.7/video-js.css" rel="stylesheet"/>
<!-- If you'd like to support IE8 -->
<script src="http://vjs.zencdn.net/ie8/1.1.2/videojs-ie8.min.js"></script>

and the following right before the last closing </body> tag:

<script src="http://vjs.zencdn.net/5.11.7/video.js"></script>

Generating the video player can be done in eprint_render.pl, as follows:

#TN - render a video.js player for video documents
%files = $doc->files;
my $type = "";
my $videoDiv = $session->make_element( "div" );
foreach my $file ( keys %files )
{
		$type = $doc->get_type;
 
		if ($type eq "video"){
			my $video_preview_image = $doc->thumbnail_url("preview");
			my $videomimetype_1="video/mp4";
			my $video_preview_1 = $doc->thumbnail_url("video_mp4");
			my $videomimetype_2="video/ogg";
			my $video_preview_2 = $doc->thumbnail_url("video_ogg");
 
 			if ($video_preview_1 || $video_preview_2){
   			my $videoplayer = $session->make_element( "video", id=>"my-video", class=>"video-js", controls=>"", preload=>"auto", poster=>$video_preview_image, 'data-setup'=>"{}" );
   			if ($video_preview_1){
   				my $source_1 = $session->make_element ("source", src=>$video_preview_1, type=>$videomimetype_1);
   				$videoplayer->appendChild( $source_1 );
   				}
				if ($video_preview_2){
					my $source_2 = $session->make_element ("source", src=>$video_preview_2, type=>$videomimetype_2);
					$videoplayer->appendChild( $source_2 );
					}
   			my $nojsP = $session->make_element ("p", class=>"vjs-no-js");
				my $nojstext = "To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video";
				$nojsP->appendChild( $session->make_text( $nojstext) );
				$videoplayer->appendChild( $nojsP );
				$videoDiv->appendChild($videoplayer);
		}
	}
}
#$videoDiv now holds the video player, and can be added to the page with appendChild($videoDiv)

Server Settings

The following file should contain a path to ffmpeg and ffprobe:

   /opt/eprints3/lib/syscfg.d/executables.pl

ffmpeg should be installed on the server. On some servers (Ubuntu), 'libx264' needs to be installed for the H264 codec.