InFilePS is a software-based inserter for closed and open captions. If you have a file-based workflow, InFilePS is the perfect tool for handling all of your insertion needs.


Insertion Modes:
  • Teletext (VBI)
  • Line 21 (VBI)
  • Open (bitmap preview)
  • Open (pre-rendered)
  • EIA-708 (user data)
  • DVB (teletext or bitmap)
Subtitle File Formats:
  • EBU STL
  • Cheetah CAP
  • Final Cut Pro XML
Video File Formats:
  • MPEG-2 Main or 422 Profile @ Main or High Level - Program, Elementary or Transport stream
  • QuickTime, incl. DVCPRO
  • IMX D10
  • Omneon (.m2v)
  • Grass Valley GXF
  • Windows Media
  • TGA sequence
For standard definition (SD) VBI insertion, InFilePS works in a similar way to a hardware SDI inserter except that it works on a file instead of an SDI signal.

For each subtitle (caption) in the source STL or CAP file, InFilePS converts the text and control characters to a luminance signal that is inserted into designated video lines in the vertical blanking interval, following the WST (World System Teletext) or Line 21 (USA) specifications.

InFilePS can generate a lower-resolution preview (proxy) in either MPEG-1 or MPEG-2 (DVD quality) which shows the captions "burnt-in". The result is intended to be as close as possible to what the viewer will see with closed captions turned on in their receiver.

For high definition (HD) insertion, InFilePS utilises standards EIA-708 (incl. backwards compatible EIA-608 mode) and ancillary data insertion according to the specific requirements of the target video file format.

InFilePS also supports high quality open caption insertion for both SD and HD content through the use of pre-rendered captions. These are typically generated using the TrueType rendering output from SysMedia WinCAPS.
Click here to request a trial version.


InFilePS is distributed worldwide by SysMedia. To purchase a licence or arrange an evaluation, please contact your local SysMedia representative.