The answer depends on what kind of system or software will be used to play or process the file on the receiving side. Telestream captioning software supports many different kinds of workflows for delivering files with closed captions to be used on file-based video servers and digital asset management (DAM).
When confirming your delivery specs with your facility or client, here are some good questions to ask:
Many facilities use a variety of transcoder solutions including, Telestream Vantage, Episode, FlipFactory, and Agility, in order to accept a wide variety of file formats and convert them to the facility's preferred format. Check to see if your transcoder preserves the closed captions embedded into the video file. In many cases, it can accept a .SCC or .MCC file with closed captions as a separate file. Or, you may need to identify the "final destination" format used by the facility, and provide that file type with embedded closed captions.
Omneon servers support different kinds of media files, depending on the options installed on the server:
Harris Nexio servers with the latest software updates (5.71) can use the MCC file format generated by our captioning software for HD closed captioning.
Seachange servers can use XDCAM HD-type MXF files with SMPTE 436M Closed Captions, or DV25 (standard def) video with DV VAUX closed captions.
Depending on your specific drop box for DG Fast, they may require either MPEG-2 Program or Transport streams with embedded closed captions for HD. For SD, they use the 720x512 MPEG-2 format also supported by Telestream captioning software using the MainConcept plugin.
Many VOD providers such as Comcast require MPEG-2 Transport Streams using the CableLabs spec (Manzanita plug-in sold separately).
Many file servers support MPEG-2 Program Streams or Transport Streams with embedded closed captioning (transport streams require Manzanita plug in sold separately).
CaptionMaker and MacCaption can add closed captions to any kind of web video format: QuickTime (including for iPod/iPhone/iPad/etc.), iTunes, YouTube, Flash, Windows Media.
CaptionMaker and MacCaption can add closed captions and subtitles to DVDs for most professional authoring programs, including DVD Studio Pro. It can also create HD subtitles for Blu-ray authoring programs.
MacCaption can extract closed captions from an already captioned video and re-export them to a huge variety of formats. It can automatically conform the closed captions to match an edit decision list, or manually edit the existing closed captions in an easy-to-use non-linear interface. And it even supports batch conversion and CLI scripting for automation workflows.