1 files changed, 24 insertions, 2 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 a150512..596a848 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
@@ -1100,21 +1100,39 @@ function VideoPlayer({ entry, transportRef, gekRef, onClose, onDownload }) {
     if (!transport) return;
     setSubtitleTrack(track.i);
     setSubtitleBusy(true);
+    // Traced end to end on purpose. Every step here happens on someone else's
+    // machine, over a link, against a file that may be gigabytes: when this
+    // does not finish, the only question worth asking is *which* step did not,
+    // and no other record of that exists.
+    const t0 = performance.now();
+    console.log('[MeshBay] subtitle: asking for track', track.i, 'of', entry.id.slice(0, 12));
     try {
       const info = await transport.requestSubtitle(entry.id, track.i);
+      console.log('[MeshBay] subtitle: node answered in',
+                  Math.round(performance.now() - t0), 'ms —',
+                  'hash=', String(info.hash).slice(0, 12), 'size=', info.size,
+                  'mime=', info.mime);
       const chunks = await pipelinedDownload(
         transport, gekRef.current, info.hash, Math.ceil(info.size / CHUNK_SIZE));
+      console.log('[MeshBay] subtitle: blob fetched in',
+                  Math.round(performance.now() - t0), 'ms —',
+                  chunks.length, 'chunk(s)');
       const url = URL.createObjectURL(
         new Blob(chunks, { type: info.mime || 'text/vtt' }));
       // Someone changed their mind while this was in flight. Dropping the blob
       // rather than installing it is the whole point of the generation: the
       // reply that arrives last is not the choice that was made last.
-      if (subtitleGenRef.current !== gen) { URL.revokeObjectURL(url); return; }
+      if (subtitleGenRef.current !== gen) {
+        console.log('[MeshBay] subtitle: superseded, blob dropped');
+        URL.revokeObjectURL(url); return;
+      }
       subtitleUrlRef.current = url;
       setSubtitleUrl(url);
+      console.log('[MeshBay] subtitle: track attached');
     } catch (err) {
       if (subtitleGenRef.current !== gen) return;
-      console.warn('[MeshBay] subtitle track', track.i, 'failed:', err);
+      console.warn('[MeshBay] subtitle track', track.i, 'failed after',
+                   Math.round(performance.now() - t0), 'ms:', err);
       setSubtitleTrack(null);
       setSubtitleError(true);
     } finally {
@@ -1137,6 +1155,10 @@ function VideoPlayer({ entry, transportRef, gekRef, onClose, onDownload }) {
     for (let i = 0; i < v.textTracks.length; i++) {
       v.textTracks[i].mode = subtitleUrl ? 'showing' : 'disabled';
     }
+    console.log('[MeshBay] subtitle: textTracks =', v.textTracks.length,
+                'mode =', v.textTracks[0] && v.textTracks[0].mode,
+                'cues =', v.textTracks[0] && v.textTracks[0].cues
+                  ? v.textTracks[0].cues.length : 'none');
   }, [subtitleUrl]);
 
   useEffect(() => {