+ _last_ccap = period;
+}
+
+
+void
+Hints::open_subtitle (PlayerText text, DCPTimePeriod period)
+{
+ if (period.from < DCPTime::from_seconds(4) && !_early_subtitle) {
+ _early_subtitle = true;
+ hint (_("It is advisable to put your first subtitle at least 4 seconds after the start of the DCP to make sure it is seen."));
+ }
+
+ int const vfr = film()->video_frame_rate ();
+
+ if (period.duration().frames_round(vfr) < 15 && !_short_subtitle) {
+ _short_subtitle = true;
+ hint (_("At least one of your subtitles lasts less than 15 frames. It is advisable to make each subtitle at least 15 frames long."));
+ }
+
+ if (_last_subtitle && DCPTime(period.from - _last_subtitle->to).frames_round(vfr) < 2 && !_subtitles_too_close) {
+ _subtitles_too_close = true;
+ hint (_("At least one of your subtitles starts less than 2 frames after the previous one. It is advisable to make the gap between subtitles at least 2 frames."));
+ }
+
+ if (text.string.size() > 3 && !_too_many_subtitle_lines) {
+ _too_many_subtitle_lines = true;
+ hint (_("At least one of your subtitles has more than 3 lines. It is advisable to use no more than 3 lines."));
+ }
+
+ size_t longest_line = 0;
+ for (auto const& i: text.string) {
+ longest_line = max (longest_line, i.text().length());
+ }
+
+ if (longest_line > 52 && !_long_subtitle) {
+ _long_subtitle = true;
+ hint (_("At least one of your subtitle lines has more than 52 characters. It is recommended to make each line 52 characters at most in length."));
+ }
+
+ if (longest_line > 79 && !_very_long_subtitle) {
+ _very_long_subtitle = true;
+ hint (_("At least one of your subtitle lines has more than 79 characters. You should make each line 79 characters at most in length."));
+ }
+
+ _last_subtitle = period;
+}
+
+
+void
+Hints::check_ffec_and_ffmc_in_smpte_feature ()
+{
+ auto f = film();
+ if (!f->interop() && f->dcp_content_type()->libdcp_kind() == dcp::ContentKind::FEATURE && (!f->marker(dcp::Marker::FFEC) || !f->marker(dcp::Marker::FFMC))) {
+ hint (_("SMPTE DCPs with the type FTR (feature) should have markers for the first frame of end credits (FFEC) and the first frame of moving credits (FFMC). You should add these markers using the 'Markers' button in the \"DCP\" tab."));
+ }
+}
+
+
+void
+Hints::join ()
+{
+ _thread.join ();
+}
+
+
+void
+Hints::check_text_languages ()
+{
+ for (auto i: film()->content()) {
+ for (auto j: i->text) {
+ if (j->use() && !j->language()) {
+ hint (_("At least one piece of subtitle or closed caption content has no specified language. "
+ "It is advisable to set the language for each piece of subtitle or closed caption content "
+ "in the \"Content→Timed text\", \"Content→Open subtitles\" or \"Content→Closed captions\" tab"));
+ return;
+ }
+ }
+ }