Frame Merger filter for virtualdub - Copyright 2002 Valentim Batista This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author can be contacted at: Valentim Batista vb@timsara.freeservers.com timsara.freeservers.com
This filter was built to smooth temporally the picture (blending each frame with the previous one) in order to reduce noise,
artefacts and the bitrate needed to encode the stream.
Propagation sets that each frame is to be blended with either the previous filter input frame (propagation off) or
with the previous filter output frame (propagation on). The first frame is not blended.
Strengths equate to blending proportions: 1 - 12,5% / 87,5 %; 2 - 25% / 75%; 3 - 37,5% / 62,5%; 4 - 50% / 50%.
Propagation effect is visible in the following table showing input frame contributions values to the current
output frame with propagation off and propagation on respectively:
2002/04/03