import maya.cmds as cmds
import os
srtfrm = cmds.getAttr('defaultRenderGlobals.startFrame')
endfrm = cmds.getAttr('defaultRenderGlobals.endFrame')
cmds.playblast(f=test, fo=True, fmt='qt', c='H.264', w=1280, h=720, p=100, qlt=100, orn=False, st=srtfrm, et=endfrm, v=False, os=True)
import maya.cmds as cmds
srtfrm = cmds.getAttr('defaultRenderGlobals.startFrame')
endfrm = cmds.getAttr('defaultRenderGlobals.endFrame')
winID= 'PlayblastUI'
if cmds.window(winID, exists=True):
cmds.deleteUI(winID)
window = cmds.window(winID, title='Make Playblast', resizeToFitChildren=True, sizeable=False, tlb=True )
cmds.columnLayout()
progressControl = cmds.progressBar(maxValue=endfrm-srtfrm, width=325)
cmds.setParent('..')
cmds.rowColumnLayout(numberOfRows=1,rowHeight=(5,5))
cmds.setParent('..')
cmds.rowLayout(numberOfColumns=2)
cmds.button( label='Playblast', w = 200, command='cmds.progressBar(progressControl, edit=True, step=1)' )
cmds.text(label=' © 2020', font='smallPlainLabelFont')
cmds.setParent('..')
cmds.showWindow()