Update app.py

app.py

@@ -876,12 +876,16 @@ try:
             timeline_df = speakers_dataFrame.copy()
             timeline_df["Resource"] = timeline_df["Resource"].apply(lambda s: get_display_name(s, currFileIndex))
             base = dt.datetime.combine(dt.date.today(), dt.time.min)
-            timeline_df["Start"] = timeline_df["Start"].apply(
-                lambda s: base + dt.timedelta(seconds=float(s.timestamp()) if isinstance(s, dt.datetime) else float(s))
-            )
-            timeline_df["Finish"] = timeline_df["Finish"].apply(
-                lambda s: base + dt.timedelta(seconds=float(s.timestamp()) if isinstance(s, dt.datetime) else float(s))
-            )
+                        def to_audio_datetime(s):
+                # If already a datetime/Timestamp, extract seconds since midnight of that date
+                if isinstance(s, (dt.datetime, pd.Timestamp)):
+                    midnight = s.replace(hour=0, minute=0, second=0, microsecond=0)
+                    seconds = (s - midnight).total_seconds()
+                else:
+                    seconds = float(s)
+                return base + dt.timedelta(seconds=seconds)
+            timeline_df["Start"] = timeline_df["Start"].apply(to_audio_datetime)
+            timeline_df["Finish"] = timeline_df["Finish"].apply(to_audio_datetime)
             fig_la = px.timeline(timeline_df, x_start="Start", x_end="Finish", y="Resource", color="Resource",title="Timeline of Audio with Speakers",
                                 color_discrete_sequence=speakerColors)
             fig_la.update_yaxes(autorange="reversed")