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+
+#------------------------------------------------------------------------------
+# $File: subtitle,v 1.2 2022/09/07 11:29:09 christos Exp $
+# subtitle: file(1) magic for subtitles files
+
+# EBU-STL
+# https://tech.ebu.ch/docs/tech/tech3264.pdf
+3 string STL EBU-STL subtitles
+>6 regex =^[0-9][0-9] \b, rate %s
+>>8 string .01 \b, v1
+!:mime application/x-ebu-stl
+>>>16 regex =^[^\ ]{0,32} \b, title "%s"
+>>>>224 regex =^[0-9]{2} \b, created %-.2s
+>>>>>&0 regex =^[0-9]{2} \b-%-.2s
+>>>>>>&0 regex =^[0-9]{2} \b-%-.2s
+!:ext stl
+
+# SubRip (srt) subtitles
+0 regex/20 =^1[\r\n]+0[01]:[0-9]{2}:[0-9]{2},[0-9]{3}\040--> SubRip
+!:mime application/x-subrip
+!:ext srt
+
+# WebVTT subtitles
+# https://www.w3.org/TR/webvtt1/
+0 string/t WEBVTT
+>&0 regex/255 =[0-9]{2}:[0-9]{2}\\.[0-9]{3}\040--> WebVTT subtitles
+!:mime text/vtt
+!:ext vtt
+
+# XML TTML subtitles
+# https://www.w3.org/TR/ttml2/
+0 string/t \<?xml
+>20 search/400 \020xmlns=
+>>&0 regex ['"]http://www.w3.org/ns/ttml TTML subtitles
+!:mime application/ttml+xml
+# Augment strength to beat plain XML
+!:strength * 3
+!:ext ttml