283 lines
9.6 KiB
Python
283 lines
9.6 KiB
Python
from PIL import Image, ImageDraw
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from PyQt5 import QtGui, QtCore, QtWidgets
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import os
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import math
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import subprocess
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import threading
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from queue import PriorityQueue
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from . import __base__
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class Video:
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'''Video Component Frame-Fetcher'''
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def __init__(self, **kwargs):
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mandatoryArgs = [
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'ffmpeg', # path to ffmpeg, usually core.FFMPEG_BIN
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'videoPath',
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'width',
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'height',
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'scale', # percentage scale
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'frameRate', # frames per second
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'chunkSize', # number of bytes in one frame
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'parent', # mainwindow object
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'component', # component object
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]
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for arg in mandatoryArgs:
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try:
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exec('self.%s = kwargs[arg]' % arg)
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except KeyError:
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raise __base__.BadComponentInit(arg, self.__doc__)
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self.frameNo = -1
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self.currentFrame = 'None'
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if 'loopVideo' in kwargs and kwargs['loopVideo']:
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self.loopValue = '-1'
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else:
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self.loopValue = '0'
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self.command = [
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self.ffmpeg,
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'-thread_queue_size', '512',
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'-r', str(self.frameRate),
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'-stream_loop', self.loopValue,
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'-i', self.videoPath,
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'-f', 'image2pipe',
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'-pix_fmt', 'rgba',
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'-filter:v', 'scale=%s:%s' % scale(
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self.scale, self.width, self.height, str),
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'-vcodec', 'rawvideo', '-',
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]
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self.frameBuffer = PriorityQueue()
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self.frameBuffer.maxsize = self.frameRate
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self.finishedFrames = {}
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self.thread = threading.Thread(
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target=self.fillBuffer,
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name=self.__doc__
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)
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self.thread.daemon = True
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self.thread.start()
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def frame(self, num):
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while True:
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if num in self.finishedFrames:
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image = self.finishedFrames.pop(num)
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return finalizeFrame(
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self.component, image, self.width, self.height)
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i, image = self.frameBuffer.get()
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self.finishedFrames[i] = image
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self.frameBuffer.task_done()
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def fillBuffer(self):
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pipe = subprocess.Popen(
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self.command, stdout=subprocess.PIPE,
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stderr=subprocess.DEVNULL, bufsize=10**8
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)
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while True:
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if self.parent.canceled:
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break
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self.frameNo += 1
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# If we run out of frames, use the last good frame and loop.
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try:
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if len(self.currentFrame) == 0:
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self.frameBuffer.put((self.frameNo-1, self.lastFrame))
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continue
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except AttributeError as e:
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self.parent.showMessage(
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msg='%s couldn\'t be loaded.' % os.path.basename(
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self.videoPath
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),
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detail=str(e)
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)
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self.parent.stopVideo()
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self.currentFrame = pipe.stdout.read(self.chunkSize)
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if len(self.currentFrame) != 0:
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self.frameBuffer.put((self.frameNo, self.currentFrame))
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self.lastFrame = self.currentFrame
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class Component(__base__.Component):
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'''Video'''
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modified = QtCore.pyqtSignal(int, dict)
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def widget(self, parent):
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self.parent = parent
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self.settings = parent.settings
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page = self.loadUi('video.ui')
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self.videoPath = ''
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self.x = 0
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self.y = 0
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self.loopVideo = False
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page.lineEdit_video.textChanged.connect(self.update)
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page.pushButton_video.clicked.connect(self.pickVideo)
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page.checkBox_loop.stateChanged.connect(self.update)
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page.checkBox_distort.stateChanged.connect(self.update)
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page.spinBox_scale.valueChanged.connect(self.update)
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page.spinBox_x.valueChanged.connect(self.update)
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page.spinBox_y.valueChanged.connect(self.update)
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self.page = page
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return page
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def update(self):
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self.videoPath = self.page.lineEdit_video.text()
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self.loopVideo = self.page.checkBox_loop.isChecked()
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self.distort = self.page.checkBox_distort.isChecked()
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self.scale = self.page.spinBox_scale.value()
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self.xPosition = self.page.spinBox_x.value()
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self.yPosition = self.page.spinBox_y.value()
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self.parent.drawPreview()
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super().update()
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def previewRender(self, previewWorker):
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self.videoFormats = previewWorker.core.videoFormats
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width = int(previewWorker.core.settings.value('outputWidth'))
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height = int(previewWorker.core.settings.value('outputHeight'))
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self.updateChunksize(width, height)
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frame = self.getPreviewFrame(width, height)
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if not frame:
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return self.blankFrame(width, height)
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else:
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return frame
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def preFrameRender(self, **kwargs):
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super().preFrameRender(**kwargs)
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width = int(self.worker.core.settings.value('outputWidth'))
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height = int(self.worker.core.settings.value('outputHeight'))
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self.blankFrame_ = self.blankFrame(width, height)
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self.updateChunksize(width, height)
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self.video = Video(
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ffmpeg=self.parent.core.FFMPEG_BIN, videoPath=self.videoPath,
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width=width, height=height, chunkSize=self.chunkSize,
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frameRate=int(self.settings.value("outputFrameRate")),
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parent=self.parent, loopVideo=self.loopVideo,
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component=self, scale=self.scale
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) if os.path.exists(self.videoPath) else None
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def frameRender(self, moduleNo, arrayNo, frameNo):
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if self.video:
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return self.video.frame(frameNo)
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else:
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return self.blankFrame_
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def loadPreset(self, pr, presetName=None):
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super().loadPreset(pr, presetName)
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self.page.lineEdit_video.setText(pr['video'])
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self.page.checkBox_loop.setChecked(pr['loop'])
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self.page.checkBox_distort.setChecked(pr['distort'])
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self.page.spinBox_scale.setValue(pr['scale'])
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self.page.spinBox_x.setValue(pr['x'])
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self.page.spinBox_y.setValue(pr['y'])
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def savePreset(self):
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return {
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'preset': self.currentPreset,
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'video': self.videoPath,
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'loop': self.loopVideo,
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'distort': self.distort,
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'scale': self.scale,
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'x': self.xPosition,
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'y': self.yPosition,
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}
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def pickVideo(self):
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imgDir = self.settings.value("backgroundDir", os.path.expanduser("~"))
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filename, _ = QtWidgets.QFileDialog.getOpenFileName(
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self.page, "Choose Video",
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imgDir, "Video Files (%s)" % " ".join(self.videoFormats)
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)
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if filename:
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self.settings.setValue("backgroundDir", os.path.dirname(filename))
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self.page.lineEdit_video.setText(filename)
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self.update()
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def getPreviewFrame(self, width, height):
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if not self.videoPath or not os.path.exists(self.videoPath):
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return
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command = [
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self.parent.core.FFMPEG_BIN,
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'-thread_queue_size', '512',
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'-i', self.videoPath,
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'-f', 'image2pipe',
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'-pix_fmt', 'rgba',
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'-filter:v', 'scale=%s:%s' % scale(
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self.scale, width, height, str),
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'-vcodec', 'rawvideo', '-',
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'-ss', '90',
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'-vframes', '1',
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]
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pipe = subprocess.Popen(
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command, stdout=subprocess.PIPE,
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stderr=subprocess.DEVNULL, bufsize=10**8
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)
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byteFrame = pipe.stdout.read(self.chunkSize)
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frame = finalizeFrame(self, byteFrame, width, height)
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pipe.stdout.close()
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pipe.kill()
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return frame
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def updateChunksize(self, width, height):
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if self.scale != 100 and not self.distort:
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width, height = scale(self.scale, width, height, int)
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self.chunkSize = 4*width*height
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def command(self, arg):
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if not arg.startswith('preset=') and '=' in arg:
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key, arg = arg.split('=', 1)
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if key == 'path' and os.path.exists(arg):
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if os.path.splitext(arg)[1] in self.core.videoFormats:
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self.page.lineEdit_video.setText(arg)
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self.page.spinBox_scale.setValue(100)
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self.page.checkBox_loop.setChecked(True)
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return
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else:
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print("Not a supported video format")
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quit(1)
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super().command(arg)
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def commandHelp(self):
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print('Load a video:\n path=/filepath/to/video.mp4')
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def scale(scale, width, height, returntype=None):
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width = (float(width) / 100.0) * float(scale)
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height = (float(height) / 100.0) * float(scale)
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if returntype == str:
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return (str(math.ceil(width)), str(math.ceil(height)))
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elif returntype == int:
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return (math.ceil(width), math.ceil(height))
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else:
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return (width, height)
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def finalizeFrame(self, imageData, width, height):
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if self.distort:
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try:
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image = Image.frombytes(
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'RGBA',
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(width, height),
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imageData)
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except ValueError:
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print('#### ignored invalid data caused by distortion ####')
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image = self.blankFrame(width, height)
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else:
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image = Image.frombytes(
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'RGBA',
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scale(self.scale, width, height, int),
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imageData)
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if self.scale != 100 \
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or self.xPosition != 0 or self.yPosition != 0:
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frame = self.blankFrame(width, height)
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frame.paste(image, box=(self.xPosition, self.yPosition))
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else:
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frame = image
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return frame
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