The DF regex pattern is not enough strict: https://github.com/sandflow/ttconv/blob/master/src/main/python/ttconv/time_code.py#L149 Timecode with pattern `00.00;22:00` is accepted, and `00:00:22.000` is not.
The DF regex pattern is not enough strict:
https://github.com/sandflow/ttconv/blob/master/src/main/python/ttconv/time_code.py#L149
Timecode with pattern
00.00;22:00is accepted, and00:00:22.000is not.