363 lines
13 KiB
Python
363 lines
13 KiB
Python
'''
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Thread created to export a video. It has a slot to begin export using
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an input file, output path, and component list. During export multiple
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threads are created to render the video as quickly as possible. Signals
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are emitted to update MainWindow's progress bar, detail text, and preview.
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Export can be cancelled with cancel()
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'''
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from PyQt5 import QtCore, QtGui
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from PyQt5.QtCore import pyqtSignal, pyqtSlot
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from PIL import Image
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from PIL.ImageQt import ImageQt
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import numpy
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import subprocess as sp
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import sys
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import os
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from queue import Queue, PriorityQueue
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from threading import Thread, Event
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import time
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import signal
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from component import ComponentError
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from toolkit.frame import Checkerboard
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from toolkit.ffmpeg import (
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openPipe, readAudioFile,
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getAudioDuration, createFfmpegCommand
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)
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class Worker(QtCore.QObject):
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imageCreated = pyqtSignal(['QImage'])
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videoCreated = pyqtSignal()
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progressBarUpdate = pyqtSignal(int)
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progressBarSetText = pyqtSignal(str)
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encoding = pyqtSignal(bool)
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def __init__(self, parent, inputFile, outputFile, components):
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QtCore.QObject.__init__(self)
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self.core = parent.core
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self.settings = parent.settings
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self.modules = parent.core.modules
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parent.createVideo.connect(self.createVideo)
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self.parent = parent
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self.components = components
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self.outputFile = outputFile
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self.inputFile = inputFile
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self.sampleSize = 1470 # 44100 / 30 = 1470
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self.canceled = False
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self.error = False
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self.stopped = False
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def renderNode(self):
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'''
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Grabs audio data indices at frames to export, from compositeQueue.
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Sends it to the components' frameRender methods in layer order
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to create subframes & composite them into the final frame.
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The resulting frames are collected in the renderQueue
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'''
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while not self.stopped:
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audioI = self.compositeQueue.get()
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bgI = int(audioI / self.sampleSize)
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frame = None
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for layerNo, comp in enumerate(reversed((self.components))):
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if layerNo in self.staticComponents:
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if self.staticComponents[layerNo] is None:
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# this layer was merged into a following layer
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continue
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# static component
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if frame is None: # bottom-most layer
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frame = self.staticComponents[layerNo]
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else:
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frame = Image.alpha_composite(
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frame, self.staticComponents[layerNo]
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)
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else:
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# animated component
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if frame is None: # bottom-most layer
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frame = comp.frameRender(bgI)
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else:
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frame = Image.alpha_composite(
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frame, comp.frameRender(bgI)
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)
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self.renderQueue.put([audioI, frame])
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self.compositeQueue.task_done()
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def renderDispatch(self):
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'''
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Places audio data indices in the compositeQueue, to be used
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by a renderNode later. All indices are multiples of self.sampleSize
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sampleSize * frameNo = audioI, AKA audio data starting at frameNo
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'''
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print('Dispatching Frames for Compositing...')
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for audioI in range(0, len(self.completeAudioArray), self.sampleSize):
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self.compositeQueue.put(audioI)
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def previewDispatch(self):
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'''
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Grabs frames from the previewQueue, adds them to the checkerboard
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and emits a final QImage to the MainWindow for the live preview
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'''
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background = Checkerboard(self.width, self.height)
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while not self.stopped:
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audioI, frame = self.previewQueue.get()
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if time.time() - self.lastPreview >= 0.06 or audioI == 0:
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image = Image.alpha_composite(background.copy(), frame)
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self.imageCreated.emit(QtGui.QImage(ImageQt(image)))
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self.lastPreview = time.time()
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self.previewQueue.task_done()
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@pyqtSlot()
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def createVideo(self):
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numpy.seterr(divide='ignore')
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self.encoding.emit(True)
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self.extraAudio = []
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self.width = int(self.settings.value('outputWidth'))
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self.height = int(self.settings.value('outputHeight'))
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self.compositeQueue = Queue()
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self.compositeQueue.maxsize = 20
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self.renderQueue = PriorityQueue()
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self.renderQueue.maxsize = 20
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self.previewQueue = PriorityQueue()
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self.reset()
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progressBarValue = 0
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self.progressBarUpdate.emit(progressBarValue)
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# =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~
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# READ AUDIO, INITIALIZE COMPONENTS, OPEN A PIPE TO FFMPEG
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# =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~
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if any([
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True if 'pcm' in comp.properties() else False
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for comp in self.components
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]):
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self.progressBarSetText.emit("Loading audio file...")
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audioFileTraits = readAudioFile(
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self.inputFile, self
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)
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if audioFileTraits is None:
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self.cancelExport()
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return
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self.completeAudioArray, duration = audioFileTraits
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else:
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duration = getAudioDuration(self.inputFile)
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class FakeList:
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def __len__(self):
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return int((duration * 44100) + 44100) - 1470
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self.completeAudioArray = FakeList()
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self.progressBarUpdate.emit(0)
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self.progressBarSetText.emit("Starting components...")
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canceledByComponent = False
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print('Loaded Components:', ", ".join([
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"%s) %s" % (num, str(component))
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for num, component in enumerate(reversed(self.components))
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]))
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self.staticComponents = {}
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for compNo, comp in enumerate(reversed(self.components)):
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try:
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comp.preFrameRender(
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audioFile=self.inputFile,
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completeAudioArray=self.completeAudioArray,
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sampleSize=self.sampleSize,
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progressBarUpdate=self.progressBarUpdate,
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progressBarSetText=self.progressBarSetText
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)
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except ComponentError:
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pass
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compProps = comp.properties()
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if 'error' in compProps or comp._lockedError is not None:
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self.cancel()
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self.canceled = True
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canceledByComponent = True
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compError = comp.error() \
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if type(comp.error()) is tuple else (comp.error(), '')
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errMsg = (
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"Component #%s (%s) encountered an error!" % (
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str(compNo), comp.name
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)
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if comp.error() is None else
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'Export cancelled by component #%s (%s): %s' % (
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str(compNo),
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comp.name,
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compError[0]
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)
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)
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comp._error.emit(errMsg, compError[1])
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break
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if 'static' in compProps:
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self.staticComponents[compNo] = \
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comp.frameRender(0).copy()
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if self.canceled:
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if canceledByComponent:
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print('Export cancelled by component #%s (%s): %s' % (
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compNo,
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comp.name,
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'No message.' if comp.error() is None else (
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comp.error() if type(comp.error()) is str
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else comp.error()[0])
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)
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)
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self.cancelExport()
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return
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# Merge consecutive static component frames together
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for compNo in range(len(self.components)):
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if compNo not in self.staticComponents \
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or compNo + 1 not in self.staticComponents:
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continue
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self.staticComponents[compNo + 1] = Image.alpha_composite(
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self.staticComponents.pop(compNo),
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self.staticComponents[compNo + 1]
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)
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self.staticComponents[compNo] = None
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ffmpegCommand = createFfmpegCommand(
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self.inputFile, self.outputFile, self.components, duration
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)
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print('###### FFMPEG COMMAND ######\n%s' % " ".join(ffmpegCommand))
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print('############################')
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self.out_pipe = openPipe(
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ffmpegCommand, stdin=sp.PIPE, stdout=sys.stdout, stderr=sys.stdout
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)
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# =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~
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# START CREATING THE VIDEO
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# =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~
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# Make 2 or 3 renderNodes in new threads to create the frames
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self.renderThreads = []
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try:
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numCpus = len(os.sched_getaffinity(0))
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except Exception:
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numCpus = os.cpu_count()
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for i in range(2 if numCpus <= 2 else 3):
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self.renderThreads.append(
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Thread(target=self.renderNode, name="Render Thread"))
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self.renderThreads[i].daemon = True
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self.renderThreads[i].start()
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self.dispatchThread = Thread(
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target=self.renderDispatch, name="Render Dispatch Thread")
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self.dispatchThread.daemon = True
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self.dispatchThread.start()
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self.lastPreview = 0.0
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self.previewDispatch = Thread(
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target=self.previewDispatch, name="Render Dispatch Thread"
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)
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self.previewDispatch.daemon = True
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self.previewDispatch.start()
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# Begin piping into ffmpeg!
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frameBuffer = {}
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progressBarValue = 0
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self.progressBarUpdate.emit(progressBarValue)
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self.progressBarSetText.emit("Exporting video...")
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if not self.canceled:
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for audioI in range(
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0, len(self.completeAudioArray), self.sampleSize):
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while True:
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if audioI in frameBuffer or self.canceled:
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# if frame's in buffer, pipe it to ffmpeg
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break
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# else fetch the next frame & add to the buffer
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audioI_, frame = self.renderQueue.get()
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frameBuffer[audioI_] = frame
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self.renderQueue.task_done()
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if self.canceled:
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break
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try:
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self.out_pipe.stdin.write(frameBuffer[audioI].tobytes())
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self.previewQueue.put([audioI, frameBuffer.pop(audioI)])
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except Exception:
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break
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# increase progress bar value
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completion = (audioI / len(self.completeAudioArray)) * 100
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if progressBarValue + 1 <= completion:
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progressBarValue = numpy.floor(completion)
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self.progressBarUpdate.emit(progressBarValue)
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self.progressBarSetText.emit(
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"Exporting video: %s%%" % str(int(progressBarValue))
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)
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numpy.seterr(all='print')
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try:
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self.out_pipe.stdin.close()
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except BrokenPipeError:
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print('Broken pipe to ffmpeg!')
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if self.out_pipe.stderr is not None:
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print(self.out_pipe.stderr.read())
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self.out_pipe.stderr.close()
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self.error = True
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self.out_pipe.wait()
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for comp in reversed(self.components):
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comp.postFrameRender()
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if self.canceled:
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print("Export Canceled")
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try:
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os.remove(self.outputFile)
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except Exception:
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pass
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self.progressBarUpdate.emit(0)
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self.progressBarSetText.emit('Export Canceled')
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else:
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if self.error:
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print("Export Failed")
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self.progressBarUpdate.emit(0)
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self.progressBarSetText.emit('Export Failed')
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else:
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print("Export Complete")
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self.progressBarUpdate.emit(100)
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self.progressBarSetText.emit('Export Complete')
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self.error = False
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self.canceled = False
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self.stopped = True
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self.encoding.emit(False)
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self.videoCreated.emit()
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def cancelExport(self):
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self.progressBarUpdate.emit(0)
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self.progressBarSetText.emit('Export Canceled')
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self.encoding.emit(False)
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self.videoCreated.emit()
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def updateProgress(self, pStr, pVal):
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self.progressBarValue.emit(pVal)
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self.progressBarSetText.emit(pStr)
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def cancel(self):
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self.canceled = True
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self.stopped = True
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self.core.cancel()
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for comp in self.components:
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comp.cancel()
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try:
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self.out_pipe.send_signal(signal.SIGINT)
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except Exception:
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pass
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def reset(self):
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self.core.reset()
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self.canceled = False
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for comp in self.components:
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comp.reset()
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