Automatically Ignore Subtitles with Invalid/Zero-Duration

Suggestions
1

Issue Summary

  • Issue: Subtitles with identical start/end times (duration=0) are not ignored in both SRT and ASS formats, causing unintended persistence until the next cue.
  • Expected: Such cues should be ignored entirely as they are invalid per subtitle standards.
  • Examples:
    1  
00:00:00,000 --> 00:00:00,000  
ABCDE

2
00:00:15,292 --> 00:00:34,083
Go away  

    Dialogue: 0,0:00:00.00,0:00:00.00,Default,,0,0,0,,-----Song 1-----

Suggested Fix: Add validation to discard zero-duration subtitles during parsing.