STL reader can generate 4 digits milliseconds time

[nywhere]

STL to VTT:

396
01:31:09.631 --> 01:31:11.1000
brauchen nur
etwas länger als erwartet.

STL to TTML:

<p region="r0" begin="01:31:09.631" end="01:31:11.1000" tts:fontSize="160%" tts:lineHeight="125%" tts:textAlign="center">
  <span tts:color="#ffffff">brauchen nur</span>
  <br />
  <span tts:color="#ffffff">etwas länger als erwartet.</span>
</p>

issue.stl.zip

[nywhere]

It actually comes from ClockTime:

>>> from ttconv.time_code import ClockTime
>>> from fractions import Fraction
>>> f = Fraction(41039999,7500)
>>> c = ClockTime.from_seconds(f)
>>> c.get_milliseconds()
1000

[palemieux]

Ouch the issue is from:

ttconv/src/main/python/ttconv/time_code.py

Line 104 in c0f6929

[palemieux]

@nywhere See #433

[nywhere]

@palemieux Yes, that fixes the issue. Thanks!