diff --git a/SwiftProject/SwiftProject/Project/Util/SpatialVideoConvertor.swift b/SwiftProject/SwiftProject/Project/Util/SpatialVideoConvertor.swift
index 24fa39e..b113bfa 100644
--- a/SwiftProject/SwiftProject/Project/Util/SpatialVideoConvertor.swift
+++ b/SwiftProject/SwiftProject/Project/Util/SpatialVideoConvertor.swift
@@ -139,7 +139,8 @@ class SpatialVideoConvertor {
 //                 print( "Added frame at \(time)")
                  
                  // callback with progress
-                 progress?( Float(time.value)/Float(duration.value),false)
+//                 progress?( Float(time.value)/Float(duration.value),false)
+                 progress?( Float(CMTimeGetSeconds(time)/CMTimeGetSeconds(duration)),false)
                  
                  // This sleep is needed to stop memory blooming - keeps around 280Mb rather than spiraling up to 8+Gig!
                  try await Task.sleep(nanoseconds: 3_000_000)