60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
#
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# Downloads the video/audio as a stream from a provided link using youtube-dl
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# does not save the file, only the most recent fragment is held. Thus, this is
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# ideal for devices with little memory
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# TODO gather video metadata before download
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#
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import tempfile
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import sys
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import subprocess
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import os
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import pip
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import signal
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def updateYoutubeDL():
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pip.main(['install', '--target=' + dirpath, '--upgrade', 'youtube_dl'])
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def importYoutubeDL():
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return __import__('youtube_dl')
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dirpath = tempfile.mkdtemp()
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sys.path.append(dirpath)
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updateYoutubeDL()
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def executeYoutubeDL(url, cb):
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env = dict(os.environ)
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env["PYTHONPATH"] = dirpath
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cmd = [
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sys.executable,
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dirpath + "/bin/youtube-dl",
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"-o", "-",
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"-f", "bestaudio/best",
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# "--extract-audio",
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"--audio-format", "mp3",
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"--prefer-ffmpeg",
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#"--postprocessor-args", "-re",
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#"--external-downloader", "ffmpeg",
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#"--external-downloader-args", "-re",
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url
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]
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popen = subprocess.Popen(cmd, env=env, stdout=subprocess.PIPE, preexec_fn=os.setsid)
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# monitor the stdout and send to callback, if result from callback function is true,
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# then kill the download process
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BUFFER_SIZE = 8096
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for chunk in iter(lambda: popen.stdout.read(BUFFER_SIZE), b''):
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if cb(chunk):
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os.killpg(os.getpgid(popen.pid), signal.SIGTERM)
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break
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popen.stdout.close()
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popen.wait()
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def download(url, cb):
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# update youtube-dl
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# TODO: do this only every once in a while
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# updateYoutubeDL()
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# start downloader so that it's stdout (with fragments) may be captured
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executeYoutubeDL(url, cb)
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