description, duration=15.0, requires-subtitles=True
seek, name="Seeking to first subtitle", playback_time=0.0, start=107.5, flags=accurate+flush
wait, duration=1.0
switch-track, type=text, index=(string)+1
wait, duration=1.0
switch-track, type=text, index=(string)+1
wait, duration=2.0
stop;