-----------------------
MSU Drop Frames Metric
-----------------------

Common description

Drop Frame Metric (DFM) is made to calculate number of drop-frames in sequence.

Visualization                           

Metric's visualization difference of Y-planes between two consecutive 
frames + 128. So, grey color (128 128 128) means that brigtness of a pixel is 
the same as at the previous frame.

Plots                           

Metric's plot is making after all measurements. "Zero" value means that current
frame exist, "one" - that it is dropped. The resulting metric's value is number
of drop-frames.

Algorithm

For each frame difference with the previous one is calculating. Metric's value
is 1 if frames are identical, 0 otherwise.

-----------------------
Plugin must be placed to \plugins folder in 
directory with the tool and have .vmp extension.
-----------------------
(c) MSU Video Group 2003-2008, http://compression.ru/video/
This source code is property of MSU Graphics and Media Lab

This code may be distributed under LGPL
(see http://www.gnu.org/licenses/lgpl.html for more details).

E-mail: video-measure((at))compression.ru
Author: Alexey Noskov
Webpage: http://compression.ru/video/quality_measure/metric_plugins/dfm_en.htm