void
FFmpegSubtitleStream::add_text_subtitle (string id, ContentTimePeriod period)
{
+ cout << id << " " << to_string(period.from) << " " << to_string(period.to) << "\n";
DCPOMATIC_ASSERT (_text_subtitles.find (id) == _text_subtitles.end ());
_text_subtitles[id] = period;
}