A PHP command line script to convert subtitles from SubRip to WebVTT format.
This tool is based on WebVTT-to-SRT. It just does the contrary.
Just provide source and destination files path.
php srt2vtt.php </some/path/original.srt> <other/path/result.vtt>
Exemple:
php srt2vtt.php my-movie.srt my-movie.vtt
Don't hesitate to use bash for loops to convert many files in in a row.
for f in *.srt; do fn=`echo $f | sed 's/srt/vtt/'`; php srt2vtt.php "$f" "$fn"; done