I think it's best to be a little more verbose when specifying commands like this - especially within scripts. A year later when you come back to look at this (especially since you are asking for help in the first place), you might not understand what:
is doing, whereas
is more readable.
Of course - all solutions are technically correct, and this is just personal opinion - but after 20 years of looking at others' shell scripts, readability is worth a few extra key strokes. On the command line, not so much.
Cheers,
ZB
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TAKE A LOOK AT THE ATTACHED PICTURE.
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Dialogue: Marked=0,0:02:39.49,0:02:40.49,Default,NTP,0000,00 00,0000,!Effect,
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