Commit graph

7 commits

Author SHA1 Message Date
Mathieu Duponchelle
156865541f closedcaption: add line21 encoder
This element acts as a counterpart of line21encoder.

Also adds a simple test validating each element using the
other.
2019-03-06 11:29:20 +01:00
Sebastian Dröge
39381643c8 closedcaption: Add ccconverter element that can convert between different types of Closed Caption formats 2018-12-19 00:19:39 +02:00
Sebastian Dröge
eb92865ea1 cccombiner: Add new closed caption combiner element
This is the inverse of ccextractor: it takes a video and closed caption
stream and places the closed caption metas on the video output buffers.
2018-11-06 16:21:42 +00:00
Edward Hervey
a41fb3c6df ceaccoverlay: New CEA-708 Closed Caption decoder and overlayer
This new element allows decoding and overlaying CEA-708 Closed Caption
streams over video.

* Supports CDP and cc_data closedcaption/x-cea-708 streams
* Uses pango to render CC stream
* Support GstVideoOverlayComposition meta if downstream supports is

Tested on various test files.

Remains to be fixed/improved:
* Switch to GstByteReader (for code safety)
* Switch to GString (instead of manual pango string construction)
* Move pango/rendering code outside of main 708 decoder file (so
  that actual CC parser/decoder can be (re)used in other scenarios).

Initial patches and improvements by:
* CableLabs RUIH-RI Team <ruihri@cablelabs.com>
* Steve Maynard <steve@secondstryke.com>
* cjun.wang" <cjun.wang@samsung.com>

https://bugzilla.gnome.org/show_bug.cgi?id=704881
2018-05-28 15:29:01 +02:00
Edward Hervey
2a1553cb88 closedcaption: Add new "line 21 VBI" CC decoder
Allows detecting and extracting CEA608 closed caption present on
the VBI of analog NTSC SD signals.
2018-05-28 15:03:57 +02:00
Edward Hervey
b0b02e7cb5 closedcaption: Include zvbi raw vbi decoder code
Current code from zapping/zvbi as of 2018-03-14. Files copied
are all LGPL v2+.

Changes from original zvbi code:
* Switch to gst-debug logging system
* Use glib for endianness detection
* Fix compilation warnings
2018-05-28 14:50:01 +02:00
Edward Hervey
2550718f59 ext: New ccextractor element
Allows extracting GstVideoCaptionMeta from a stream and outputs
it to a standalone stream.

Part of a new 'ext' closedcaption plugin, since more features are
going to be added, which will depend on external dependencies such
as pango.
2018-05-28 11:54:17 +02:00