[FFmpeg-trac] #8844(avformat:open): DVB subtitles don't work without PCR any more

FFmpeg trac at avcodec.org
Wed Aug 12 22:19:21 EEST 2020

#8844: DVB subtitles don't work without PCR any more
             Reporter:  mkver        |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mpegts       |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  1            |
Changes (by cus):

 * analyzed:  0 => 1
 * cc: cus (added)
 * reproduced:  0 => 1


 The DVB subtitle parser separates packets by their PTS, but it can't do
 that if PTS is set to unset because of non-present PCR.

 A workaround is to use {{{ -fix_teletext_pts 0 }}} for such streams.

 I am not sure how this should be fixed. Maybe
 42aa02418e43802b4ebcca373d2413ab63a0307e should be reverted, unlike
 teletext, DVB subtitles should be timed correctly as far as I know.

Ticket URL: <https://trac.ffmpeg.org/ticket/8844#comment:3>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list