1 files changed, 27 insertions, 0 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/video-player.js b/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
index 596a848..3bb9124 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
@@ -1159,6 +1159,33 @@ function VideoPlayer({ entry, transportRef, gekRef, onClose, onDownload }) {
                 'mode =', v.textTracks[0] && v.textTracks[0].mode,
                 'cues =', v.textTracks[0] && v.textTracks[0].cues
                   ? v.textTracks[0].cues.length : 'none');
+    if (!subtitleUrl) return;
+    // The state above is a single instant, and every part of it can be right
+    // there and wrong a second later: a re-render can replace the <track>,
+    // which resets the mode nothing would set again. What decides whether a
+    // subtitle is on screen is `activeCues`, and that is the one number no
+    // log has ever carried. Sampled for ten seconds, with the cue that ought
+    // to be showing at this instant, so "none active" and "active but not
+    // painted" stop being the same observation.
+    let n = 0;
+    const probe = setInterval(() => {
+      const tt = v.textTracks[0];
+      if (!tt) { console.log('[MeshBay] subtitle probe: the track is gone'); return; }
+      const cues = tt.cues ? Array.from(tt.cues) : [];
+      const now = v.currentTime;
+      const should = cues.find((c) => c.startTime <= now && c.endTime >= now);
+      console.log('[MeshBay] subtitle probe', ++n,
+                  't =', now.toFixed(1), 'mode =', tt.mode,
+                  'cues =', cues.length,
+                  'active =', tt.activeCues ? tt.activeCues.length : 'null',
+                  'due here =', should ? `[${should.startTime.toFixed(1)}-`
+                    + `${should.endTime.toFixed(1)}] ${should.text.slice(0, 40)}` : 'none',
+                  'first/last =', cues.length
+                    ? `${cues[0].startTime.toFixed(1)}..${cues[cues.length - 1].endTime.toFixed(1)}`
+                    : '-');
+      if (n >= 5) clearInterval(probe);
+    }, 2000);
+    return () => clearInterval(probe);
   }, [subtitleUrl]);
 
   useEffect(() => {