Correct timestamps when merging fragmented WebVTT #67
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Some services stream their WebVTT subtitle track in segments with relative timestamps, resulting in a broken subtitle file (either no captions/empty file, timestamps will be offset wrong very close to one another, or identical to one another). This PR introduces a function to handle such concatenated WebVTT subtitles and fix the timestamps.
Example 1: Segmented WebVTT [DASH]
Example (1) Input (merged by devine):
Example (1) Output (Fixed):
Example 2: Segmented WebVTT [HLS]
Example (2) Input with HLS X-TIMESTAMP-MAP extension (merged by devine):
Example (2) Output (Fixed):
Most Logic is borrowed from
N_m3u8DL-RE
project. Ref: