[Bug 704881] Partial ATSC_user_data and CEA-708 Closed Captions Support

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=704881
  GStreamer | gst-plugins-bad | git master

--- Comment #62 from cjunwang <cjun.wang at samsung.com> 2015-01-22 08:21:06 UTC ---
updated as maintainer's suggestions, using small mpeg video demuxer and
closedcaption overlay element. Most of implementation is same. There is a minor
changement. Currently use mpegvideodemux behind mpegvideoparse. mpegvideoparse
parses and frames mpeg video data, and do not really change input bitstream. 
and in decodebin, there is already reusable logics to skip same type parse
element in pipeline.


to test it, use 
gst-launch-1.0 filesrc location=cc.ts ! tsdemux name=d d.video_0021 ! decodebin
name=b b. ! ccoverlay name=over ! videoconvert ! ximagesink sync=false b. !
over.

or

gst-launch-1.0 filesrc location=cc.ts ! tsdemux name=d d.video_0021 !
mpegvideoparse ! closedcaptiondemux name=m m.mpegv_src ! queue
max-size-buffers=0 max-size-time=0 ! avdec_mpeg2video skip-frame=5 ! ccoverlay
name=lay1 ! videoconvert ! ximagesink sync=false m.cc_data_src ! queue
max-size-buffers=0 max-size-time=0 ! lay1.

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