wrote a renderinbackground script.

A Department leader needs a tool for batch rendering in nuke, while the render in background function in Nuke can be executed simultaneously with multiple render tasks, so I consider using this method.

During debugging, it was found that Renderinbackground's management of memory was worrying, so I added the parameters to control the memory consumption when multitasking was rendered. This function is very quick to write, and after writing it has to consider artist habits, it is not a good idea to put this function into a separate node in the toolbar, artist will be troublesome, so I decided to integrate this function on the write node. This is the result of the final execution:write node more than a paging, artist used very handy, but this function is limited by computer computing and memory capacity, after all, is a single-machine to perform multi-tasking, resources are tight, engineering simple, this function has advantages, engineering complex, memory tight, this function is chicken.
Talk was cheap,show you the code:
#####################################################################
Def renderinbackground ():
node = Nuke.thisnode ()
If Node.knob (' User '):
print ' exist '
Else
KNOB_TK = nuke. Tab_knob (' User ', ' renderinbackground ')
Node.addknob (KNOB_TK)
If Node.knob (' Information '):
print ' exist '
Else
KNOB_TK2 = nuke. Text_knob (' Information ', ' Info: ')
Knob_tk2.setvalue ("Sure your setting didn ' t overflow available memory,so enough memory is necessary.")
Node.addknob (KNOB_TK2)
If Node.knob (' Firstframe_1 '):
print ' exist '
Else
KNOB_FF = nuke. Int_knob (' firstframe_1 ', ' firstframe ')
Knob_ff.setvalue (1001)
Node.addknob (KNOB_FF)
Knob_ff.settooltip (' entry first frame of render range ')
If Node.knob (' Lastframe_1 '):
print ' exist '
Else
KNOB_LF = nuke. Int_knob (' lastframe_1 ', ' lastframe ')
Knob_lf.setvalue (1100)
Node.addknob (KNOB_LF)
Knob_lf.settooltip (' entry last frame of render range ')
If Node.knob (' Splitnum '):
print ' exist '
Else
KNOB_SN = nuke. Int_knob (' Splitnum ', ' splitnum ')
Knob_sn.setvalue (2)
Node.addknob (KNOB_SN)
Knob_sn.settooltip (' entry number of splited Framerange ')
If Node.knob (' MaxThreads '):
print ' exist '
Else
KNOB_MT = nuke. Int_knob (' MaxThreads ', ' maxthreads ')
Knob_mt.setvalue (4)
Node.addknob (KNOB_MT)
If Node.knob (' MaxCache '):
print ' exist '
Else
KNOB_MC = nuke. Int_knob (' MaxCache ', ' MaxCache ')
Knob_mc.setvalue (2000)
Node.addknob (KNOB_MC)
If Node.knob (' unnamed '):
print ' exist '
Else
Knob_tt = nuke. Text_knob (' unnamed ', ')
Node.addknob (KNOB_TT)
If Node.knob (' Renderinbackground '):
print ' exist '
Else
Knob_py = nuke. Pyscript_knob (' Renderinbackground ', ' renderinbackground ')
Node.addknob (knob_py)
Knob_py.setcommand ("Import Time"
If Nuke.thisnode (). Knob (' file '). Value (). Find (':/') = =-1:
Nuke.message (' file is empty ')
Else
If Os.path.exists (Os.path.dirname (Nuke.thisnode (). Knob (' file '). Value ())) ==true:
Print Nuke.thisnode (). Knob (' file '). Value ()
Else
Os.makedirs (Os.path.dirname (Nuke.thisnode (). Knob (' file '). Value ()))

firstframe_2 = Int (Nuke.thisnode (). Knob (' firstframe_1 '). Value ())
lastframe_2 = Int (Nuke.thisnode (). Knob (' lastframe_1 '). Value ())
splitnum_2 = Int (Nuke.thisnode (). Knob (' Splitnum '). Value ())

subrange = Int ((lastframe_2 + 1-firstframe_2)/splitnum_2)

MaxThreads = Nuke.thisnode (). Knob (' MaxThreads '). Value ()
Maxcache = Nuke.thisnode (). Knob (' Maxcache '). Value ()
view = Nuke.views ()
Limits = {' MaxThreads ': maxthreads, ' maxCache ': '%dm '%maxcache}

For I in Range (splitnum_2+1):
Framerange = nuke. Framerange ()
Frameranges = nuke. Frameranges ()

If firstframe_2-1 + subrange * (i+1) >= lastframe_2:
Framerange.setlast (lastframe_2)
Else
Framerange.setlast (firstframe_2-1 + subrange * (i+1))
If lastframe_2 >= firstframe_2 + subrange * I:
Framerange.setfirst (firstframe_2 + subrange * i)
Framerange.setincrement (1)
Frameranges.add (Framerange)
Time.sleep (0.1)
Print Frameranges
Nuke.executebackgroundnuke (nuke. Exe_path,[nuke.thisnode ()],frameranges,view,limits)
Else
Pass



INPUTX = Nuke.thisnode () [' Xpos '].value ()
Inputy = Nuke.thisnode () [' Ypos '].value ()
NewNode = Nuke.nodes.Read (File=nuke.thisnode (). Knob (' file '). Value (), first=firstframe_2,last=lastframe_2,)
Newnode.setxypos (int (INPUTX), int (inputy) +50) "
)


Nuke.addoncreate (renderinbackground,nodeclass = ' Write ')

wrote a renderinbackground script.