I have the following PCRE2 regex that works to match and remove timestamp lines in a .webVTT subtitle file (the default for YouTube):
^[0-9].:[0-9].:[0-9].+$
This changes this:
00:00:00.126 --> 00:00:10.058
How are you today?
00:00:10.309 --> 00:00:19.272
Not bad, you?
00:00:19.559 --> 00:00:29.365
Been better.
To this:
How are you today?
Not bad, you?
Been better.
How would I convert this PCRE2 regex to an idiomatic (read: sane-looking) equivalent for sed
's flavour of regex?
Using your regex with sed
$ sed -En '/^[0-9].:[0-9].:[0-9].+$/!p' file
How are you today?
Not bad, you?
Been better.
Or, do not match lines that end with an integer
$ sed -n '/[0-9]$/!p' file
How are you today?
Not bad, you?
Been better.