154 lines
5.0 KiB
Python
154 lines
5.0 KiB
Python
from subprocess import call, Popen, PIPE, check_output, DEVNULL
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from os import listdir, remove
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from os.path import splitext, exists
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from re import match
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from enum import Enum
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from datetime import timedelta
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from math import ceil
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from argparse import ArgumentParser
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# parse arguments
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parser = ArgumentParser(description='Download player-looped videos with youtube-dl & ffmpeg.')
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parser.add_argument('-nv', '--nonverbose', help='Turn off non-critical messages to user.')
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parser.add_argument('-e', '--extension', default='mp4', help='Set the container to use for the output.')
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parser.add_argument('url', type=str, help='The URL of the site containing the video to download.')
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args = parser.parse_args()
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args.extension = '.' + args.extension
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VERBOSE = False if args.nonverbose else True
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class Stream(Enum):
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AUDIO = 1
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VIDEO = 2
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class File(Enum):
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LIST = 1
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LOOP = 2
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OUTPUT = 3
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def print_opt(*args, **kwargs):
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if VERBOSE:
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print(*args, **kwargs)
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def getCmdStdErr(command):
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process = Popen(command, stderr=PIPE, stdout=PIPE)
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out, err = process.communicate()
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return err
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def getDuration(ffprobe_output):
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durationPattern = r'.*Duration:\s(.+),\sstart.*'
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regex = match(durationPattern, str(ffprobe_output))
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duration = regex.groups()[0] if regex else None
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if not duration:
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raise ValueError('Cannot process ffprobe output!')
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return duration
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def downloadStreams():
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print_opt('Downloading audio stream... ', end='', flush=True)
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call(('youtube-dl', '--ignore-config',
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'--extract-audio',
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'--output', '{}.%(ext)s'.format(FILES[Stream.AUDIO]),
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URL),
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stdout=DEVNULL, stderr=DEVNULL)
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print_opt('Done!')
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print_opt('Downloading video stream... ', end='', flush=True)
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call(('youtube-dl', '--ignore-config',
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'--output', '{}.%(ext)s'.format(FILES[Stream.VIDEO]),
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URL),
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stdout=DEVNULL, stderr=DEVNULL)
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print_opt('Done!')
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def readExtensions():
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for file in listdir():
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for filename in FILES:
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if match('^{}.*'.format(FILES[filename]), file):
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FILES[filename] = file
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def yes_no_question(question, default):
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valid = {"yes": True, "y": True, "ye": True,
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"no": False, "n": False}
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if default is None:
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prompt = " [y/n] "
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elif default == "yes":
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prompt = " [Y/n] "
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elif default == "no":
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prompt = " [y/N] "
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else:
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raise ValueError("Invalid default answer: {}!".format(default))
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while True:
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print(question + prompt)
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choice = input().lower()
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if default is not None and choice == '':
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return valid[default]
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elif choice in valid:
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return valid[choice]
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else:
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print("Please respond with 'yes'(y) or 'no'(n)!")
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FILES = {Stream.AUDIO: 'audio', Stream.VIDEO: 'video',
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File.LIST: 'list.txt', File.LOOP: 'loop', File.OUTPUT: 'output'+args.extension}
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OUTPUT_KEYS = [File.OUTPUT]
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URL = args.url
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# fetch video title
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FILES[File.OUTPUT] = check_output(('youtube-dl', '--get-title', args.url)).decode('utf-8').strip() + args.extension
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# ask what to do if output exists
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if exists(FILES[File.OUTPUT]):
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answer = yes_no_question('A file named "{}" already exists! Overwrite?'.format(FILES[File.OUTPUT]), default='no')
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if not answer:
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print_opt('Exiting!')
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exit()
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else:
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remove(FILES[File.OUTPUT])
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# download streams and update FILE dict with extensions
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downloadStreams()
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readExtensions()
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# get stream lengths via ffprobe
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audioData= getDuration(getCmdStdErr(('ffprobe', FILES[Stream.AUDIO]))).split(':')
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videoData = getDuration(getCmdStdErr(('ffprobe', FILES[Stream.VIDEO]))).split(':')
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audioLen = timedelta(hours=float(audioData[0]), minutes=float(audioData[1]), seconds=float(audioData[2]))
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videoLen = timedelta(hours=float(videoData[0]), minutes=float(videoData[1]), seconds=float(videoData[2]))
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# decide which stream needs some looping
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longer = audioLen if audioLen > videoLen else videoLen
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shorter = audioLen if audioLen < videoLen else videoLen
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shorterFile = FILES[Stream.AUDIO] if audioLen < videoLen else FILES[Stream.VIDEO]
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FILES[File.LOOP] += splitext(shorterFile)[1]
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timesLoop = ceil(longer.seconds / shorter.seconds)
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# write concat helper file for ffmpeg
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with open(FILES[File.LIST], 'w') as f:
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for i in range(timesLoop):
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print("file '{}'".format(shorterFile), file=f)
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# loop shorter stream
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print_opt('Looping shorter stream... ', end='', flush=True)
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call(('ffmpeg', '-f', 'concat', '-i', FILES[File.LIST], '-c', 'copy', FILES[File.LOOP]),
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stdout=DEVNULL, stderr=DEVNULL)
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print_opt('Done!')
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# mux with audio
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print_opt('Muxing streams... ', end='', flush=True)
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call(('ffmpeg', '-i', FILES[File.LOOP],
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'-i', FILES[Stream.AUDIO],
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'-map', '0:v:0', '-map', '1:a:0',
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'-c', 'copy', FILES[File.OUTPUT]),
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stdout=DEVNULL, stderr=DEVNULL)
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print_opt('Done!')
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# cleanup
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for key in FILES:
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if key not in OUTPUT_KEYS:
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remove(FILES[key])
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