diff --git a/app/main.py b/app/main.py
index 3d6eca1..5447fb4 100644
--- a/app/main.py
+++ b/app/main.py
@@ -193,7 +193,20 @@ def _build_acquisitions():
         dur_s = _job_duration_s(j)
         d["_duration"] = _fmt_dur(dur_s)
         d["gp_label"] = gp_label.get((j["acquisition_id"], j["auv"], j["gopro_serial"]), "?")
-        d["video_duration_fmt"] = _fmt_dur(int(j["video_duration_s"] or 0)) if (j["video_duration_s"] or 0) > 0 else "—"
+        vid_dur_s = float(j["video_duration_s"] or 0)
+        d["video_duration_fmt"] = _fmt_dur(int(vid_dur_s)) if vid_dur_s > 0 else "—"
+        # Fix segment_label end-time when exiftool returned duration=0 at ingest
+        seg_label = j["segment_label"] or ""
+        if vid_dur_s > 0 and "–" in seg_label:
+            try:
+                from datetime import datetime as _dt, timedelta as _td
+                start_str = seg_label.split("–")[0].strip()
+                t0 = _dt.strptime(start_str, "%H:%M")
+                t1 = t0 + _td(seconds=vid_dur_s)
+                seg_label = f"{start_str}–{t1.strftime('%H:%M')}"
+            except Exception:
+                pass
+        d["segment_label"] = seg_label
         d["trimmed_total"] = (j["trimmed_head"] or 0) + (j["trimmed_tail"] or 0)
         thumb_path = DB_PATH.parent / "thumbnails" / f"job_{j['id']}.jpg"
         d["has_thumbnail"] = thumb_path.is_file()