153 lines
4.5 KiB
Python
153 lines
4.5 KiB
Python
import sys, io, os
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from PyQt4 import QtCore, QtGui, uic
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from os.path import expanduser
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import subprocess as sp
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import numpy
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from PIL import Image
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import tempfile
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from shutil import rmtree
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import atexit
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import time
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class Core():
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def __init__(self):
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self.lastBackgroundImage = ""
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self._image = None
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self.FFMPEG_BIN = self.findFfmpeg()
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self.tempDir = None
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atexit.register(self.deleteTempDir)
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def findFfmpeg(self):
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if sys.platform == "win32":
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return "ffmpeg.exe"
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else:
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try:
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with open(os.devnull, "w") as f:
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sp.check_call(['ffmpeg', '-version'], stdout=f, stderr=f)
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return "ffmpeg"
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except:
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return "avconv"
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def parseBaseImage(self, backgroundImage, preview=False):
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''' determines if the base image is a single frame or list of frames '''
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if backgroundImage == "":
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return ['']
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else:
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_, bgExt = os.path.splitext(backgroundImage)
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if not bgExt == '.mp4':
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return [backgroundImage]
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else:
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return self.getVideoFrames(backgroundImage, preview)
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def drawBaseImage(self, backgroundFile):
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if backgroundFile == '':
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im = Image.new("RGB", (int(self.settings.value('outputWidth')), int(self.settings.value('outputHeight'))), "black")
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else:
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im = Image.open(backgroundFile)
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if self._image == None or not self.lastBackgroundImage == backgroundFile:
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self.lastBackgroundImage = backgroundFile
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# resize if necessary
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if not im.size == (int(self.settings.value('outputWidth')), int(self.settings.value('outputHeight'))):
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im = im.resize((int(self.settings.value('outputWidth')), int(self.settings.value('outputHeight'))), Image.ANTIALIAS)
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return im
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def readAudioFile(self, filename, parent):
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command = [ self.FFMPEG_BIN,
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'-i', filename]
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try:
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fileInfo = sp.check_output(command, stderr=sp.STDOUT, shell=False)
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except sp.CalledProcessError as ex:
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fileInfo = ex.output
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pass
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info = fileInfo.decode("utf-8").split('\n')
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for line in info:
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if 'Duration' in line:
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d = line.split(',')[0]
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d = d.split(' ')[3]
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d = d.split(':')
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duration = float(d[0])*3600 + float(d[1])*60 + float(d[2])
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command = [ self.FFMPEG_BIN,
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'-i', filename,
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'-f', 's16le',
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'-acodec', 'pcm_s16le',
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'-ar', '44100', # ouput will have 44100 Hz
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'-ac', '1', # mono (set to '2' for stereo)
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'-']
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in_pipe = sp.Popen(command, stdout=sp.PIPE, stderr=sp.DEVNULL, bufsize=10**8)
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completeAudioArray = numpy.empty(0, dtype="int16")
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progress = 0
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lastPercent = None
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while True:
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if self.canceled:
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break
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# read 2 seconds of audio
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progress = progress + 4
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raw_audio = in_pipe.stdout.read(88200*4)
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if len(raw_audio) == 0:
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break
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audio_array = numpy.fromstring(raw_audio, dtype="int16")
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completeAudioArray = numpy.append(completeAudioArray, audio_array)
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percent = int(100*(progress/duration))
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if percent >= 100:
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percent = 100
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if lastPercent != percent:
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string = 'Loading audio file: '+str(percent)+'%'
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parent.progressBarSetText.emit(string)
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parent.progressBarUpdate.emit(percent)
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lastPercent = percent
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in_pipe.kill()
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in_pipe.wait()
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# add 0s the end
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completeAudioArrayCopy = numpy.zeros(len(completeAudioArray) + 44100, dtype="int16")
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completeAudioArrayCopy[:len(completeAudioArray)] = completeAudioArray
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completeAudioArray = completeAudioArrayCopy
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return completeAudioArray
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def deleteTempDir(self):
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if self.tempDir and os.path.exists(self.tempDir):
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rmtree(self.tempDir)
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def getVideoFrames(self, videoPath, firstOnly=False):
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self.tempDir = os.path.join(tempfile.gettempdir(), 'audio-visualizer-python-data')
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# recreate the temporary directory so it is empty
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self.deleteTempDir()
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os.mkdir(self.tempDir)
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if firstOnly:
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filename = 'preview%s.jpg' % os.path.basename(videoPath).split('.', 1)[0]
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options = '-ss 10 -vframes 1'
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else:
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filename = '$frame%05d.jpg'
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options = ''
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sp.call( \
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'%s -i "%s" -y %s "%s"' % ( \
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self.FFMPEG_BIN,
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videoPath,
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options,
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os.path.join(self.tempDir, filename)
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),
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shell=True
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)
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return sorted([os.path.join(self.tempDir, f) for f in os.listdir(self.tempDir)])
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def cancel(self):
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self.canceled = True
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def reset(self):
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self.canceled = False
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