hello bourne,
i fixed your chromakey script to work with video files and i removed the
whitebalance stuff (makes sense only for a camera).
one thing that doesn't work is setting the key color by just clicking
inside the video, because there's no getBitmap() method for video nodes.
if you need this feature, you have to render into an offscreen canvas.
hope this helps,
thomas
On 06/22/2011 12:39 PM, bourne_hlm wrote:
I send the avg_chromakey.py which i modified in the mail attachment.
I want it read image from a video file, could you please help me?
I'm a new one, Please forgive my stupidity, many thanks.
Bourne
At 2011-06-22 16:50:54，"Ulrich von Zadow"<[email protected]> wrote:
On Jun 22, 2011, at 8:59 AM, bourne_hlm wrote:
Thank you very much. But avg_chromakey.py need camera device, i don't have it,
i just have some avi files with background.
How can i test the chromakey filter with some avi files with background ?
I try to replace the camera node with video player node, but failed. Can you
help me?
In principle, this should work. Can you give a clear description of what you
tried and what the result was?
At 2011-06-22 06:11:21，"Ulrich von Zadow"<[email protected]> wrote:
On Jun 21, 2011, at 11:21 AM, bourne_hlm wrote:
How can i test the chromakey in libavg?
avg_chromakey.py --help
or
avg_chromakey.bat --help under windows
:-),
Uli
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# libavg - Media Playback Engine.
# Copyright (C) 2003-2008 Ulrich von Zadow
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Current versions can be found at www.libavg.de
#
import sys
from libavg import avg, AVGApp
from libavg.ui import button
#from libavg import parsecamargs
GUI_SIZE=(300, 200)
g_Player = avg.Player.get()
class Slider(avg.DivNode):
def __init__(self, width, min, max, onChange, **kwargs):
avg.DivNode.__init__(self, **kwargs)
self.__onChange = onChange
self.size = (width, 20)
self.__min = min
self.__max = max
self.__val = min
avg.LineNode(pos1=(7,14), pos2=(width-7,14), color="FFFFFF", strokewidth=2,
parent=self)
self.__slider = avg.DivNode(pos=(0,0), size=(14,20), parent=self)
avg.PolygonNode(pos=((1,0), (13,0), (7,18)), fillopacity=1, fillcolor="FFFFFF",
color="808080", parent=self.__slider)
self.__slider.setEventHandler(avg.CURSORDOWN, avg.MOUSE,
self.__onSliderDown)
self.setEventHandler(avg.CURSORDOWN, avg.MOUSE, self.__onBarDown)
self.__isDragging = False
def getVal(self):
return self.__val
def setVal(self, val):
self.__val = val
self.__positionSlider()
val = property(getVal, setVal)
def __onSliderDown(self, event):
self.__slider.setEventCapture()
self.__slider.setEventHandler(avg.CURSORMOTION, avg.MOUSE, self.__onSliderMove)
self.__slider.setEventHandler(avg.CURSORUP, avg.MOUSE, self.__onSliderUp)
self.__sliderDownPos = event.pos
self.__isDragging = True
self.__dragStartVal = self.__val
def __onSliderMove(self, event):
numPixelsMoved = float(event.pos.x-self.__sliderDownPos.x)
self.__val = (self.__dragStartVal+numPixelsMoved/(self.size.x-14)
*(self.__max-self.__min))
self.__positionSlider()
def __onSliderUp(self, event):
self.__onSliderMove(event)
self.__slider.releaseEventCapture()
self.__slider.setEventHandler(avg.CURSORMOTION, avg.MOUSE, None)
self.__slider.setEventHandler(avg.CURSORUP, avg.MOUSE, None)
self.__isDragging = False
def __onBarDown(self, event):
if not(self.__isDragging):
localPos = self.getRelPos(event.pos)
ratio = (localPos.x-7)/(self.size.x-14)
self.__val = self.__min+ratio*(self.__max-self.__min)
print localPos, ", ", ratio, ", ", self.__val
self.__positionSlider()
def __positionSlider(self):
if self.__val < self.__min:
self.__val = self.__min
elif self.__val > self.__max:
self.__val = self.__max
ratio = ((self.__val-self.__min)/(self.__max-self.__min))
self.__slider.pos = (ratio*(self.size.x-14), 0)
self.__onChange()
class FXSlider(avg.DivNode):
def __init__(self, row, min, max, fxNode, fxAttrName, caption, isInt, **kwargs):
avg.DivNode.__init__(self, **kwargs)
avg.RectNode(pos=(0,8), size=(280,38), color="808080", strokewidth=2,
parent=self)
textBgRect = avg.RectNode(pos=(8,2), fillcolor="000000", fillopacity=1,
strokewidth=0, parent=self)
caption = avg.WordsNode(pos=(10,0), text=caption, parent=self)
textBgRect.size = caption.getMediaSize()+(4, 2)
self.__words = avg.WordsNode(pos=(240,23), parent=self)
self.__slider = Slider(220, min, max, self.__onSliderMove, pos=(15,20),
parent=self)
self.pos = (0, row*46)
self.__fxNode = fxNode
self.__fxAttrName = fxAttrName
self.__caption = caption
self.__isInt = isInt
self.__slider.val = getattr(self.__fxNode, fxAttrName)
def __onSliderMove(self):
if self.__isInt:
setattr(self.__fxNode, self.__fxAttrName, int(self.__slider.val))
self.__words.text = "%i"%self.__slider.val
else:
setattr(self.__fxNode, self.__fxAttrName, self.__slider.val)
self.__words.text = "%.2f"%self.__slider.val
class TextButton(button.Button):
def __init__(self, text, **kwargs):
size = kwargs["size"]
upNode = avg.DivNode()
avg.RectNode(size=size, fillcolor="FFFFFF", fillopacity=1, color="FFFFFF",
parent=upNode)
avg.WordsNode(pos=(4,3), text=text, color="000000", parent=upNode)
downNode = avg.DivNode()
avg.RectNode(size=size, fillcolor="000000", fillopacity=1, color="FFFFFF",
parent=downNode)
avg.WordsNode(pos=(4,3), text=text, color="FFFFFF", parent=downNode)
kwargs["upNode"] = upNode
kwargs["downNode"] = downNode
button.Button.__init__(self, **kwargs)
def colorToString(colorTuple):
s = "%02X%02X%02X"%colorTuple[:-1]
return s
class Chromakey(AVGApp):
def init(self):
avg.RectNode(size=(800,534), fillcolor="FF0000", fillopacity=1, strokewidth=0, parent=self._parentNode)
self.__fileNode = avg.VideoNode(href=sys.argv[1], loop=True, parent=self._parentNode)
self.__fileNode.play()
self.__filter = avg.ChromaKeyFXNode()
self.__fileNode.setEffect(self.__filter)
self.__filter.color = "0000FF"
self.__filter.htolerance = 0.05
self.__filter.stolerance = 1.0
self.__filter.ltolerance = 1.0
self.__filter.softness = 0.0
self.__createGUI()
def __createGUI(self):
self.__guiDiv = avg.DivNode(pos=(self.__fileNode.getMediaSize().x+10,10), parent=self._parentNode)
self.__colorWords = avg.WordsNode(pos=(0,14), parent=self.__guiDiv)
self.__colorWords.text = "Key Color: "+self.__filter.color
self.__colorRect = avg.RectNode(pos=(200,12), size=(20, 20),
fillcolor=self.__filter.color, fillopacity=1,
color="FFFFFF", parent=self.__guiDiv)
# node.setEventHandler(avg.CURSORDOWN, avg.MOUSE,
# self.__onColorDown)
FXSlider(1, 0.0, 1.0, self.__filter, "htolerance", "Hue Tolerance",
False, parent=self.__guiDiv)
FXSlider(2, 0.0, 1.0, self.__filter, "stolerance", "Saturation Tolerance",
False, parent=self.__guiDiv)
FXSlider(3, 0.0, 1.0, self.__filter, "ltolerance", "Lightness Tolerance",
False, parent=self.__guiDiv)
FXSlider(4, 0.0, 1.0, self.__filter, "softness", "Softness",
False, parent=self.__guiDiv)
FXSlider(5, 0, 8, self.__filter, "erosion", "Erosion",
True, parent=self.__guiDiv)
FXSlider(6, 0.0, 1.0, self.__filter, "spillthreshold", "Spill Suppression",
False, parent=self.__guiDiv)
# TextButton(pos=(0,332), text="Whitebalance", size=(100,22),
# clickHandler=self.__onWhitebalance, parent=self.__guiDiv)
TextButton(pos=(110,332), text="Dump Config", size=(100,22),
clickHandler=self.__dumpConfig, parent=self.__guiDiv)
# def __onColorDown(self, event):
# pos = node.getRelPos(event.pos)
# bmp = node.getBitmap() ### a video node has no getBitmap() method ###
# color = bmp.getPixel(pos)
# colorString = colorToString(color)
# self.__filter.color = colorString
# self.__colorWords.text = "Key Color: "+colorString
# self.__colorRect.fillcolor = colorString
# def __onWhitebalance(self, event):
# node.setWhitebalance(
# node.getWhitebalanceU(), node.getWhitebalanceV())
# node.doOneShotWhitebalance()
def __dumpConfig(self, event):
print "Chromakey:"
print " color=", self.__filter.color
print " htolerance=", self.__filter.htolerance
print " stolerance=", self.__filter.stolerance
print " ltolerance=", self.__filter.ltolerance
print " softness=", self.__filter.softness
print " erosion=", self.__filter.erosion
print " spillthreshold=", self.__filter.spillthreshold
resolution=(GUI_SIZE[0]+800, max(GUI_SIZE[1],534))
Chromakey.start(resolution=resolution)
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