[FFmpeg-trac] #9877(undetermined:new): ffmpeg core dumped error when map webvtt subtitles

[FFmpeg]

#9877: ffmpeg core dumped error when map webvtt subtitles
-------------------------------------+-------------------------------------
             Reporter:  tudge        |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  webvtt       |               Blocked By:
  crash                              |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by tudge):

 Replying to [comment:8 Carl Eugen Hoyos]:
 > Please provide a simplified command line that does not use hardware
 encoders and no external encoders if possible.

 it worked without scaling in 1 video profile with h264_nvenc encoder. FHD
 to FHD:

 ffmpeg -i any.mkv -c:v h264_nvenc -b:v 5M -map v:0 -c:a aac -b:a 128k -ac
 2 -map a:0 -c:s webvtt -map s:1 -f hls -hls_list_size 0 -hls_time 6
 -master_pl_name master.m3u8 -var_stream_map
 "v:0,a:0,agroup:aud,name:English,language:en,default:YES,s:0,sgroup:subs,name:English,language:en,default:YES"
 /any/stream.m3u8

 but subtitles is showing up only on iOS & hlsplayer with delay.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9877#comment:9>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker