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[FFmpeg-devel,0/5] add ARIB caption decoder using libaribcaption

Message ID 20220521103711.413481-1-aimingoff@pc.nifty.jp
Headers show
Series add ARIB caption decoder using libaribcaption | expand


TADANO Tokumei May 21, 2022, 10:37 a.m. UTC
This patch set add another ARIB caption decoder using libaribcaption
external library: https://github.com/xqq/libaribcaption
The library decodes subtitles of ISDB-based TV broadcasting.
It is not only for Japanese ARIB STD-B24 caption, but also for
Brazilian ABNT NBR 15606-1 and Philippines version of ISDB-T.

Unlike libaribb24, it supports 3 types of subtitle outputs:
* text: plain text
* ass: ASS formatted text
* bitmap: bitmap image

Default subtitle type is ASS as same as libaribb24, but it can
be changed by `-sub_type` option.
You can see ARIB caption with ffplay tool:
  ffplay -sub_type bitmap MPEG.TS

Sample files exist under:
Some of them are encrypted and some don't contain ARIB caption data.
Good samples for ARIB caption are:
  brazil/07-25_20-33-35_UCV - HD_.ts

TADANO Tokumei (5):
  lavc/libaribcaption.c: add ARIB caption decoder using libaribcaption
  lavc/allcodecs.c: add aribcaption_decoder
  configure + lavc/Makefile: define build infrastructure for
  lavc/codec_desc.c: remove AV_CODEC_PROP_TEXT_SUB property
  lavf/mpegts.c: set some properties for ARIB caption

 configure                   |    5 +
 libavcodec/Makefile         |    1 +
 libavcodec/allcodecs.c      |    1 +
 libavcodec/codec_desc.c     |    1 -
 libavcodec/libaribb24.c     |    1 +
 libavcodec/libaribcaption.c | 1097 +++++++++++++++++++++++++++++++++++
 libavformat/mpegts.c        |   19 +-
 7 files changed, 1123 insertions(+), 2 deletions(-)
 create mode 100644 libavcodec/libaribcaption.c