AST DBA Verbit U.S. produces a wide variety of output file formats, including "side-car" caption files and encoded outputs. In this article we describe which outputs the most common platforms and players require.
In general, there is no standard caption file -- the caption file you need is highly dependent upon which player you intend to display captions in. Below is a list of common platforms and players, and the output they require. You can also check a complete list of the output formats we generate.
Other Video Platforms
Integrations with Video Platforms and Lecture Capture Systems
Learn more about our integration with several Online Video Platforms and Lecture Capture Systems in this section of our Support Center.
Learning Management Systems:
Learn in our articles how to use the .DFXP or .SRT caption files with JW Player 6, or JW Player 5. If you're using JW Player 7, you can also use the .VTT caption file. Note that if the player has been customized for a site, the web developers need to have planned for accommodating captions.
You can use our Video Encoding offer to create subtitled videos for this player. Or you can learn in the following tutorials how to use the .VTT file with Flowplayer v5.1+ (HTML5); or the .SRT file with the Flash versions of Flowplayer.
Nomensa's Accessible Media Player
Custom Flash Players
Contact the developer of the player in order to learn if the player supports captioning, what caption output it requires, and how to associate the caption file with the video. When you have all this information, you can choose the appropriate output and make the captioning request.
Desktop Players and Software:
Windows Media Player
Check out our overview of how to caption for Windows Media Player, and learn there what's the best option for your workflow, and which caption files you need.
Check out our overview of how to caption for the QuickTime player, and learn there what's the best option for your workflow, and which caption files you need.
There are many different high-end hardware and software solutions for encoding closed captions for broadcast purposes, but you can learn in our tutorials how to use Apple Compressor or ProMedia Carbon, and which caption files you need.
Enabling closed captioning or subtitles in Limelight is quite simple. Once a caption file is uploaded for a media, the Limelight player will automatically display a caption-control on the screen.
The format of a caption file should follow the Distribution Format Exchange Profile (DFXP) standard (now called TTML). Learn in this article how to use the .DFXP format with your media file.
Ooyala supports the DFXP v2006 format (the specification is now called TTML), which is equivalent to our .DFXP format. Ooyala also provides a Closed Caption validator tool, which allows users to check the format of their DFXP/TTML documents.
You can upload the .DFXP format into your media files using the Backlot UI. More information about Ooyala's support for the .DFXP format is available in their article.
PBS’s COVE 2.0 (Comprehensive Online Video Ecosystem) supports the .SMPTETT.XML format for closed captioning. In addition, it will also accept the .SMI and .SCC formats. If one of these "legacy" formats is provided, the COVE 2.0 system will automatically convert it to SMPTE-TT for storage and online display.
MediaCore currently supports caption files in the SRT, WebVTT, or DFXP formats. You can upload one of these formats following the instructions in their article on this topic.
Unfortunately, WebEx currently does not facilitate uploading closed caption files for meetings. Accommodations for hearing-impaired participants are offered through WebEx's Meeting Center and Event Center.
WebEx has also partnered with Closed Caption provider companies Caption Colorado and Rapidtext, Inc. to offer Live captioning to its users at a discounted rate.
Learn more about how to enable closed captioning in WebEx and how to designate a closed captionist for your meeting in their article on this topic.
- If you have a complete submission but didn't request the caption files you need, you can use our Redo feature for free (for 6 months after the original request) and generate a new set of outputs.