Download SRT file

• OpenSubtitles.org

Adjust time stamps

• Gnome Subtitles
• Gaupol
• SubtitleEditor

Convert to utf8 with iconv

• iconv -f $SRC_ENCODING -t UTF8 $TITLE.srt > $TITLE.utf8.srt

Mux in with MP4box, setting lanuage

• MP4Box -add utf8_$FILE:lang=ENG $

Fix subtitle identifier

• perl -p -i -e 's/text/sbtl/'

Notes

• Working with files containing h.264, aac, sbtl

Test

MP4Box -add test.utf8.srt#trackID=3:lang=ENG test.m4v