[FFmpeg-trac] #8334(undetermined:open): Start time is doubled when using HLS or DASH input

[FFmpeg]

#8334: Start time is doubled when using HLS or DASH input
-------------------------------------+-------------------------------------
             Reporter:  ronag        |                    Owner:  (none)
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  hls dash     |               Blocked By:
  start time offset timestamp        |
  double                             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Balling):

 Looks like it is fixed already, files created with ffmpeg.exe -f lavfi -i
 "testsrc=duration=10" -output_ts_offset 60 -f dash -hls_playlist 1
 loop.mpd

 no longer report

   Duration: 00:00:10.00, start: 120.000000, bitrate: 0 kb/s
 when you do

 ffmpeg -seek_timestamp 1 -ss 65 -i loop.mpd out.mp4


 it does report

   Duration: 00:00:10.00, start: 60.000000, bitrate: 0 kb/s


 so it appears to be fixed recently.

 Is
 https://patchwork.ffmpeg.org/project/ffmpeg/patch/tencent_78B8FB9628CD09200E4D9CCFDFD549272E07@qq.com/
 for editlist or what? Because obviously if you try atmos sound + aac sound
 in https://events-delivery.apple.com/1402uekefjejgldkvaqrqxgjmtehwhez/m3u8
 /vod_index-VEPhheWQmQZLrgakajRXoUbKAmmjVXxZ.m3u8

 it does appear the start time is supposed to be converted to editlist for
 gapless playback (at least aac (https://events-
 delivery.apple.com/1402uekefjejgldkvaqrqxgjmtehwhez/m3u8/vod_index-
 VEPhheWQmQZLrgakajRXoUbKAmmjVXxZ.m3u8) has Duration: 00:58:46.68, start:
 9.956000, bitrate: N/A, while video has Duration: 00:58:46.66, start:
 10.066733, bitrate: N/A, while atmos in EAC-3 has   Duration: 00:58:46.62,
 start: 10.000000, bitrate: N/A). So everything is counted from EAC-3.
 Indeed, eac3 has 256 samples of silence in the start, which is 0.00533...
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Ticket URL: <https://trac.ffmpeg.org/ticket/8334#comment:5>
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