v1.6.1

Video tracking is now scene-cut aware, fixing mosaic ghosting in fast-cut
footage.

Fixes

• Mosaics no longer linger for up to a second after a hard cut, drifting
  across the new shot
• A mosaic can no longer jump to a different person who appears in a
  similar position right after a cut

Details

• The analysis pass now detects shot boundaries, and tracks stop cleanly at
  every cut: no track survives a scene change, no gap is interpolated
  across one, and track ends are never extended past one — in both tracking
  directions
• A cut is only declared when the frame-to-frame change stands well above
  the recent motion level and persists for the following frames, so
  camera flashes, strobes, and fast pans within a shot do not split tracks
• Coverage inside a shot — through motion blur, side profiles, and brief
  occlusions — is unchanged
• The log reports how many scene cuts each video contained