zvbi

Vertical Blanking Interval (VBI) utilities
  http://zapping.sf.net/ZVBI
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Television broadcasts use the VBI to transmit text such as closed captioning (NTSC), Teletext (PAL/SECAM), and now Intercast and the ATVEC Internet television encodings. The zvbi library is used to capture and decode raw VBI data.

This package contains the following utilities:
* zvbid, a proxy for VBI devices. It forwards VBI data streams to one or
more connected clients and manages channel change requests.
* zvbi-atsc-cc, a command-line utility that captures ATSC TV transmissions
using a Linux DVB device and decodes the enclosed Closed Caption data.
It can record both NTSC caption (EIA 608-B) and DTVCC caption (CEA 708-C).
* zvbi-chains, a wrapper which executes the VBI application given on the
command line while overloading several C library calls so that the
application can be forced to access VBI devices via the VBI proxy instead
of device files directly.
* zvbi-ntsc-cc, a command-line utility for decoding and capturing closed
captioning (CC) for NTSC and webtv.