"Invalid date" errors inside output vtt file

[sebma]

Hi,

Here the command I typed :

$ vtt-shift Joel_Encouragement.en.vtt --offsetMs=-500 --out=Joel_Encouragement.SHIFTED.en.vtt

Here's my input file : Joel_Encouragement.en.vtt

Here's the generated output file : Joel_Encouragement.SHIFTED.en.vtt

I get many Invalid date errors inside output vtt file :

$ grep Invalid.date Joel_Encouragement.SHIFTED.en.vtt
00:05:35.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:11:02.500
00:11:03.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:15:10.500
00:15:11.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:21:42.400
00:21:43.400 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:24:46.500
00:26:55.400 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:30:38.500
00:30:39.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:33:42.400
00:36:07.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:39:26.500
00:39:27.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:42:14.500
00:42:15.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:45:26.500
00:45:27.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 00:48:46.500
00:52:47.500 --> Invalid date
Invalid date --> 00:53:59.500
00:59:58.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:03:34.500
01:06:39.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:09:50.500
01:11:43.400 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:13:42.400
01:26:07.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:28:14.500
01:29:58.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:32:46.500
01:32:47.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:43:58.500
01:43:58.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:47:42.400
01:49:43.400 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 01:55:26.500
02:03:58.500 --> Invalid date
Invalid date --> Invalid date
Invalid date --> Invalid date
Invalid date --> 02:10:54.400
02:10:55.400 --> Invalid date
Invalid date --> Invalid date
Invalid date --> 02:17:10.500
02:23:43.400 --> Invalid date

Can you have a look ?

[dwindibank]

I have a similar issue:

I was trying to shift the time stamps on an hour and a half video (the video had a 13 second copy right notice added to the start and I needed to shift all the VTT timing by 13 seconds).

For the first 4 minutes it works, then the Invalid dates start appearing. From 8 minutes to 59 minutes all time stamps are "Invalid Date" ... but then from the one hour mark it starts working again.

[dwindibank]

For my issue, it ended up being HH:mm:ss.MMM verse mm:ss.MMM ... I created a pull request with a check between the two different input formats: #2