#5881: Allow writing subtitle only hls streams
             Reporter:  cbass        |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  hls webvtt   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Changes (by cus):

 * status:  new => open
 * type:  defect => enhancement
 * component:  undetermined => avformat


 I don't think ffmpeg is capable of writing a HLS stream without at least
 an audio component. Until then, you can workaround this by writing an
 audio stream in addition to the subtitle. Also you might want to use
 -fix_sub_duration flag if converting from dvb teletext.

Ticket URL: <https://trac.ffmpeg.org/ticket/5881#comment:2>
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