March 9, 2007; 03:06 AM
Use of Adobe Flash technology to add dynamic and engaging video
content to Web sites is growing exponentially. With WGBH's new
solution, developers are able to more easily add captions in Flash.
Now, millions of users who are deaf or hard of hearing are better able
to experience Web-based video in Flash and search engines are able to
capitalize on captions as search metadata for SWF content.
WGBH,
Boston's public broadcaster and a decades-long pioneer in developing
access solutions to media for audiences with disabilities has created a
component for Flash, CC for Flash, that can be authored into any SWF
file for playback in Adobe Flash Player. The component is easy to use,
and freely available from the NCAM Web site at
http://ncam.wgbh.org/webaccess/ccforflash.
Funding for
development of CC for Flash was provided by a grant to WGBH's Carl and
Ruth Shapiro Family National Center for Accessible Media (NCAM) from
the NEC Foundation of America, with additional support provided by
Yahoo!
CC for Flash: The Details
• Uses external files produced in the W3C's Distribution Format Exchange Profile (DFXP) of the Timed-Text Authoring Format.
• Imports existing formats such as Apple QuickTime's QTtext, with support for Microsoft's SAMI format soon to follow.
•
Exposes many of its internal functions through ActionScriptTM language
so that the author can control and customize many of the features.
• Can play back caption metadata that has been embedded in the video by tools such as Captionate.
• Can be linked to any video playback components in Flash or directly to Netstream objects in the SWF of the FLV file.
•
Allows the author to set the caption display box coordinates and
default text attributes, like background color, text foreground color,
font face and size, opacity, etc., at authoring time. At playback time,
any text attributes that are explicitly defined in the external caption
file will override the defaults.
• Captions can be added after the
video content in Flash is posted, allowing for flexibility across
production and distribution environments.
• Allows captions to be searched.
•
Comes with an optional player, ccPlayer for Flash, which allows those
unfamiliar with Flash programming to embed video content in Flash into
a Web page with minimal effort.
• Is compatible with Flash MX2004 (7) and 8 authoring packages.
A Best Friend for CC for Flash: MAGpie
MAGpie,
NCAM's free do-it-yourself captioning and description application
allows developers to create captions once, and then to output those
captions in multiple formats, including QuickTime, Windows Media, and
Real.
NCAM has now added the W3C's new timed-text format, the
Distribution Format Exchange Profile (DFXP), to MAGpie's caption export
options. MAGpie version 2.0.2 is the only tool available today for
authoring DFXP caption files. With MAGpie and CC for Flash, it's now
easier than ever to provide captions for Flash Player compatible video
content.
WGBH's Media Access Group can also provide Flash
caption authoring services for long-form content not easily handled by
MAGpie, and for producers who would rather outsource their captioning
work. WGBH's Media Access Group, since 1972 the leader in providing
captioning and description to the broadcast, film, educational and
online media worlds, is now the first organization that can provide
DFXP captions for Flash presentations.
About NCAM and WGBH
The
Carl and Ruth Shapiro Family National Center for Accessible Media at
WGBH is a research, development and advocacy entity that works to make
existing and emerging technologies accessible to all audiences. NCAM is
part of the Media Access Group at WGBH, which also includes The Caption
Center (est. 1972), and Descriptive Video Service® (est. 1990). For
more information, visit access.wgbh.org.
WGBH Boston is
America's preeminent public broadcasting producer, the source of fully
one-third of PBS's prime-time lineup, along with some of public
television's best-known lifestyle shows and children's programs and
many public radio favorites. WGBH is the number one producer of Web
sites on pbs.org, one of the most trafficked dot-org Web sites in the
world.