Anyone get a chance to look into this?
I know it takes a little bit to setup / test / and show the problem. But
we are still at a loss to why nuke.metadata() is "writing" incorrect
text to the frame its writing for.
On 02/14/2013 07:16 PM, Thomas Craigen wrote:
I have been spending a bit of time trying to get this to work. I have
not been able to produce the correct results when setting the
"message" knob on a text node.
Originally, I tried using an event hook to "process" the read nodes.
You can see commented section in the example below.
*Problem: *It appears that if I use node.metadata() before the frame
renders, then try to set the Text.message knob, the data for the first
frame is written to both the "first" and "second" frame. All frames
after that appear to be offset by -1. So it appears that its reading
data from 0-2 instead of 1-3. However, printing the same exact data to
stdout shows the data to be correct. Its only the composite image that
is incorrect.
I have provided a sample script. At the bottom of the script is the
"nuke" script I used to generate the test frames (frame1: red, frame2:
green, frame3:blue)
I have put some comments inline, see ### PROBLEM AREA ### for the
section that does not seem to be working.
*simple.py:*
def GetData(node):
mdata = node.metadata()
filename = mdata.get('input/filename')
return filename
def AddMetadataToTextNodes(*args, **kwargs):
"""callback: This callback is designed to
update the data on-the-fly within this script only
"""
textnode = kwargs.get('textnode')
readnode = kwargs.get('readnode')
metadata = readnode.metadata() ### appears to get the correct data
filename = metadata.get('input/filename')
#textnode.evaluate()
print "setting data:", filename
### PROBLEM AREA ###
### some reason filename prints just fine
### however, the output in the "composited" frame shows the
"previous" frame
### tcl works as does calling the GetData() function... what am I
doing wrong?
textnode.knob('message').setValue('metadata:' + str(filename) + '
tcl: [metadata input/filename] py: [python GetData(nuke.thisNode())]')
nuke.dependentNodes(textnode, evaluateAll=True)
def RunComp(path=None, outcomp=None):
### NOTE: I tried doing event hooks, however, this also did not work
"""
nuke.removeBeforeRender(AddMetadataToTextNodes,args=(asset_info,
node_state_info),nodeClass='Write')
nuke.addBeforeRender(AddMetadataToTextNodes,args=(asset_info,
node_state_info),nodeClass='Write')
nuke.removeAfterFrameRender(AddMetadataToTextNodes,args=(asset_info,
node_state_info),nodeClass='Write')
nuke.addAfterFrameRender(AddMetadataToTextNodes,args=(asset_info,
node_state_info),nodeClass='Write')
"""
if not outcomp:
outcomp = os.environ.get('TEMP', None)
if not outcomp:
if sys.platform.startswith('win'):
outcomp = 'C:/temp/'
else:
outcomp = '/tmp/'
if path:
readnode = nuke.nodes.Read(file="%s" % path)
textnode = nuke.nodes.Text()
final_write = nuke.nodes.Write()
outimages = os.path.dirname(path) + '/outimages.####.exr'
outimages = outimages.replace('\\', '/')
final_write.knob("file").setValue(outimages)
textnode.connectInput(0, readnode)
textnode.knob('font').setValue('[python
BfdNuke.getFontDir()]Arial.ttf')
#textnode
#textnode.setExpression('[python
{nuke.thisNode().knob(\'msg\').getValue()} ]')
final_write.connectInput(0, textnode)
outcomp = os.path.join(outcomp, 'comp.nk')
outcomp = outcomp.replace('\\','/')
if outcomp.endswith('.nk'):
nuke.scriptSave( outcomp )
print "Wrote: %s" % outcomp
else:
print "WARNING: Unable to write 'outcomp' since it does
not end with '.nk': %s was specified."
firstFrame = 1
lastFrame = 4
readnode.knob('first').setValue(firstFrame)
readnode.knob('origfirst').setValue(firstFrame)
readnode.knob('last').setValue(lastFrame)
readnode.knob('origlast').setValue(lastFrame)
for i in range(firstFrame, lastFrame):
AddMetadataToTextNodes(readnode=readnode, textnode=textnode)
### PROBLEM AREA ###
### appears to write the incorrect data when using
node.metadata()
nuke.execute(final_write, i, i, 1)
else:
raise ValueError("Must provide a path in nuke style string:
/path/to/dir/files.####.exr")
if __name__ == '__main__':
### does not check if frames exist. generate test frames before
running
RunComp('/tmp/test.####.exr')
### use the script by calling nuke -t 'path_to_script/simple.py'
#### NUKE SCRIPT USED TO GENERATE TEST FILES ####
"""
set cut_paste_input [stack 0]
version 7.0 v1
Constant {
inputs 0
channels rgb
color {0 0 1 0}
name Constant3
selected true
xpos 71
ypos -148
}
Write {
file /tmp/test.0003.exr
file_type exr
name Write3
selected true
xpos 71
ypos -76
}
Constant {
inputs 0
channels rgb
color {1 0 0 0}
name Constant1
selected true
xpos -123
ypos -155
}
Write {
file /tmp/test.0001.exr
file_type exr
name Write1
selected true
xpos -123
ypos -68
}
Constant {
inputs 0
channels rgb
color {0 1 0 0}
name Constant2
selected true
xpos -27
ypos -151
}
Write {
file /tmp/test.0002.exr
file_type exr
name Write2
selected true
xpos -27
ypos -69
}
"""
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