fixes

web/src/components/timeline/MotionSegment.tsx

@@ -120,16 +120,16 @@ export function MotionSegment({
     return showMinimap && segmentTime === alignedMinimapEndTime;
   }, [showMinimap, segmentTime, alignedMinimapEndTime]);
 
-  // Top border: current segment has no recording, but previous segment has recordings
+  // Bottom border: current segment HAS recording, but next segment (below/earlier) has NO recording
   const isFirstSegmentWithoutRecording = useMemo(() => {
-    return hasRecording === false && prevIsNoRecording === false;
+    return hasRecording === true && nextIsNoRecording === true;
-  }, [hasRecording, prevIsNoRecording]);
-
-  // Bottom border: current segment has no recording, but next segment has recordings
-  const isLastSegmentWithoutRecording = useMemo(() => {
-    return hasRecording === false && nextIsNoRecording === false;
   }, [hasRecording, nextIsNoRecording]);
 
+  // Top border: current segment HAS recording, but prev segment (above/later) has NO recording
+  const isLastSegmentWithoutRecording = useMemo(() => {
+    return hasRecording === true && prevIsNoRecording === true;
+  }, [hasRecording, prevIsNoRecording]);
+
   const firstMinimapSegmentRef = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
@@ -198,10 +198,10 @@ export function MotionSegment({
           onTouchEnd={(event) => handleTouchStart(event, segmentClick)}
         >
           {isFirstSegmentWithoutRecording && (
-            <div className="absolute -top-[1px] left-0 right-0 h-[1px] bg-primary-variant/50" />
+            <div className="absolute bottom-[0px] left-0 right-0 h-[1px] bg-primary-variant/50" />
           )}
           {isLastSegmentWithoutRecording && (
-            <div className="absolute bottom-[0px] left-0 right-0 h-[1px] bg-primary-variant/50" />
+            <div className="absolute -top-[1px] left-0 right-0 h-[1px] bg-primary-variant/50" />
           )}
           {!motionOnly && (
             <>

web/src/components/timeline/VirtualizedMotionSegments.tsx

@@ -158,12 +158,17 @@ export const VirtualizedMotionSegments = forwardRef<
 
         const hasRecording = getRecordingAvailability(segmentTime);
 
+        // Check if previous and next segments have recordings
+        // This is important because in motionOnly mode, the segments array is filtered
         const prevSegmentTime = segmentTime + segmentDuration;
         const nextSegmentTime = segmentTime - segmentDuration;
 
         const prevHasRecording = getRecordingAvailability(prevSegmentTime);
         const nextHasRecording = getRecordingAvailability(nextSegmentTime);
 
+        // Check if prev/next segments have no recording available
+        // Note: We only check hasRecording, not motion values, because segments can have
+        // recordings available but no motion (eg, start of a recording before motion begins)
         const prevIsNoRecording = prevHasRecording === false;
         const nextIsNoRecording = nextHasRecording === false;
 

web/src/views/recording/RecordingView.tsx

@@ -924,7 +924,7 @@ function Timeline({
     {
       before: timeRange.before,
       after: timeRange.after,
-      scale: Math.round(zoomSettings.segmentDuration / 2),
+      scale: Math.round(zoomSettings.segmentDuration),
       cameras: mainCamera,
     },
   ]);