276 lines
10 KiB
Python
276 lines
10 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, uic
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from PyQt5.QtCore import pyqtSignal, pyqtSlot
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from PIL import Image, ImageDraw, ImageFont
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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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import core
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from toolkit import openPipe, checkOutput
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from frame import FloodFrame
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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=None):
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QtCore.QObject.__init__(self)
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self.core = parent.core
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self.settings = parent.core.settings
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self.modules = parent.core.modules
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self.parent = parent
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parent.videoTask.connect(self.createVideo)
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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 compNo, comp in reversed(list(enumerate(self.components))):
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if compNo in self.staticComponents and \
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self.staticComponents[compNo] is not None:
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# static component
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if frame is None: # bottom-most layer
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frame = self.staticComponents[compNo]
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else:
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frame = Image.alpha_composite(
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frame, self.staticComponents[compNo]
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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(compNo, bgI)
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else:
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frame = Image.alpha_composite(
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frame, comp.frameRender(compNo, 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 = FloodFrame(1920, 1080, (0, 0, 0, 0))
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background.paste(Image.open(os.path.join(
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self.core.wd, "background.png")))
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background = background.resize((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(str, str, list)
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def createVideo(self, inputFile, outputFile, components):
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numpy.seterr(divide='ignore')
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self.encoding.emit(True)
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self.components = components
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self.outputFile = outputFile
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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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self.progressBarSetText.emit("Loading audio file...")
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self.completeAudioArray = self.core.readAudioFile(inputFile, self)
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self.progressBarUpdate.emit(0)
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self.progressBarSetText.emit("Starting components...")
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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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numComps = len(self.components)
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for compNo, comp in enumerate(self.components):
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comp.preFrameRender(
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worker=self,
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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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if 'static' in comp.properties():
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self.staticComponents[compNo] = \
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comp.frameRender(compNo, 0).copy()
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ffmpegCommand = self.core.createFfmpegCommand(inputFile, outputFile)
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print(ffmpegCommand)
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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 three renderNodes in new threads to create the frames
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self.renderThreads = []
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for i in range(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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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:
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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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self.out_pipe.stdin.close()
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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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# out_pipe.terminate() # don't terminate ffmpeg too early
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self.out_pipe.wait()
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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:
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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 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.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:
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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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