Jur153engsub | Convert020006 Min Free

Since I cannot play the file, here is what you should expect based on the file name:

Open the new subtitle file in any text editor. Check first few timestamps: jur153engsub convert020006 min free

Before:
00:01:00,000 --> 00:01:05,000
After:
00:00:39,994 --> 00:00:44,994 (if original started at 1:00 min) Since I cannot play the file, here is

If you see negative times (e.g., -00:00:00,006), either your original had very early subtitles or you subtracted too much — but 20 sec from start is fine unless file begins under 20 sec. If your error message reads error at line

If your error message reads error at line 24: timestamp 00:02:00.06 out of order, this is a corrupt subtitle line. Fix manually:

Original: Subtitle appears at 00:30:00,000
After conversion: Subtitle appears at 00:29:39,994
(Because 30 sec − 20.006 sec = 9.994 sec into the minute, i.e. 39.994 sec mark of previous minute — careful with minute rollover)

More precisely:
Subtract 20 seconds + 6 milliseconds from all subtitle timestamps.