[FFmpeg-trac] #1482(undetermined:new): FFMPEG fails to create a SRT file when extracting Subtitles

[FFmpeg]

#1482: FFMPEG fails to create a SRT file when extracting Subtitles
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             Reporter:  ramitbhalla  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  cc           |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by pross):

 Hi reimar & cehoyos. You are right, I got 608 and 708 confused,
 nonetheless, both CEA-708 and EIA-608 subtitles are present in the file.

 * NCIS.wtv, Stream 3. Subtitles are stored using EIA-708. By no
 coindicence, the stream type guid is MEDIASUBTYPE_DTVCCDATA. Most packets
 in the stream correspond to a CEA-708 DTVCCDATA packet (described in the
 CEA-708 standard). There are also many 2-byte packets, which seem out of
 place; perhaps they are frame counters or checksums added by Microsoft.

 * NCIS.wtv, Stream 1. If you copy this stream into TS format, the
 CCextractor program will extract subtitles from it. The subtitles within
 Stream 1 are in EIA-608 format.

 I have uploaded two more .wtv samples to /incoming/wtv_dtvccdata.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1482#comment:21>
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