v1.7.0

Video redaction is dramatically faster, and mosaics now fully cover close-up
faces.

Improvements

• Video processing is several times faster — a 3-minute 1080p clip that used to
  take over ten minutes now finishes in under a minute
• Blur redaction is no longer the bottleneck: it renders at a fraction of the
  previous cost with the same visual strength
• Mosaics on large, close-up faces are now properly coarse, so a face stays
  unrecognizable no matter how much of the frame it fills

Details

• Blur now runs on a downscaled copy of each region and is scaled back up,
  capping the kernel cost while preserving the same blur strength
• The soft-edge feather mask is computed once per face size and reused across
  frames regardless of position, instead of being rebuilt for every frame
• The mosaic block count is capped so a face is always reduced to at most a
  dozen cells across, keeping large faces obscured
• Frame redaction runs in parallel across CPU cores, and encode writes overlap
  the masking work, so both passes use the machine more fully