Mjpegtools YUV video stream processing tools

yuvafps:
  A linear frame averaging, frame rate converter. Does a better job than the
  frame dropping/duplicating converters.

yuvfade:
  Will fade the video to black after X number of frames. Uses a trial and
  error method of fading to black

yuvwater:
  Attempts to detect and remove semi-transperant watermarks from the source.
  Produces a PGM file of the detected watermark which is used to remove or
  reduce the effect.

WWW: http://silicontrip.net/~mark/lavtools/