[FFmpeg-trac] #11101(undetermined:new): [EIA-608] Data ignored due to columns exceeding screen width AND weird character

[FFmpeg]

#11101: [EIA-608] Data ignored due to columns exceeding screen width AND weird
character
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             Reporter:  superbonaci  |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Trent):

 I've been able to duplicate this with captures from ATSC broadcasts of
 mpeg2 video with eia_608 captions.

 I tested a number of ffmpeg versions and this worked correctly in ffmpeg
 4.3.8.
 In 4.4.0 and later, it fails.

 There's a stream of "Data ignored due to columns exceeding screen width"
 errors.  The CC data is incorrectly decoded to be the same two character
 (one line worth), repeating.

 Another thing is that sometimes the original MPEG-TS capture will decode
 correctly.  But if it is remuxed into a mp4, using "-c copy", then trying
 to decode captions from that mp4 will fail.  Decoding with ffmpeg 4.3.8 or
 earlier still works.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11101#comment:5>
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