srt subtitles fails to be read if auto-numbering not present - OK with VLC or Mplayer

[artofit]

Case:
In the same folder:

1/ Take some video: test.mp4

2/ Create a srt text file (utf8) test.srt as such:

00:00:03,000 --> 00:00:04,000
Some subtitle 1

00:00:05,000 --> 00:00:06,000
another one

00:00:10,000 --> 00:00:12,000
last one

Play again with mpv

no show any subtitles now.

Expected behavior of the wanted feature

Try VLC or Mplayer, you do see that they show the subtitles

[Akemi]

report it to ffmpeg, we use their srt decoder. though this is probably not valid srt anyway.

[artofit]

though this is probably not valid srt anyway.
Strictly speaking no, the counting ought to be specified, but so what as time code is what matters?
VLC and Mplayer are fault tolerant and render the expected result.

report it to ffmpeg, we use their srt decoder. though this is probably not valid srt anyway.
https://trac.ffmpeg.org/ticket/9103