[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:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by ramitbhalla):

 One more problem I've seen (in the same wtv file above). when using the
 ffmpeg command to copy the subtitle stream it converts the subtitles from
 dvb_teletext to dvb_subtitle (from text to image if I understand correct).

 Is that normal? Shouldn' it preserve the teletext stream?

 e.g. ffmpeg -i ncis.wtv


 {{{
   Duration: 00:31:59.52, start: 1.797444, bitrate: 874 kb/s
     Stream #0:0[0xe](eng): Audio: ac3, 48000 Hz, 5.1(side), s16, 384 kb/s
     Stream #0:1[0xf](eng): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
     Stream #0:2[0x10]: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR
 1:1 DAR 16:9], 38810 kb/s, 57.22 fps, 29.97 tbr
 , 10000k tbn, 59.94 tbc
     Stream #0:3[0x11]: Subtitle: dvb_teletext
     Stream #0:4[0x0]: Attachment: mjpeg
 }}}


 After stream copying to TS, ffmpeg -i ncis.ts


 {{{
     Stream #0:0[0x100](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
 Hz, 5.1(side), s16, 384 kb/s
     Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
 Hz, stereo, s16, 192 kb/s
     Stream #0:2[0x102]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 38810 k
 b/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
     Stream #0:3[0x103](eng): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)
 }}}

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1482#comment:7>
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