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""" |
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ffmpeg_streaming.process |
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~~~~~~~~~~~~ |
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Run FFmpeg commands and monitor FFmpeg |
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:copyright: (c) 2020 by Amin Yazdanpanah. |
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:website: https://www.aminyazdanpanah.com |
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:email: [email protected] |
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:license: MIT, see LICENSE for more details. |
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""" |
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import shlex |
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import subprocess |
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import threading |
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import logging |
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import time |
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from ffmpeg_streaming._hls_helper import HLSKeyInfoFile |
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from ffmpeg_streaming._utiles import get_time, time_left |
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def _p_open(commands, **options): |
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""" |
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@TODO: add documentation |
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""" |
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logging.info("ffmpeg running command: {}".format(commands)) |
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return subprocess.Popen(shlex.split(commands), **options) |
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class Process(object): |
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out = None |
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err = None |
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def __init__(self, media, commands: str, monitor: callable = None, **options): |
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""" |
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@TODO: add documentation |
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""" |
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self.is_monitor = False |
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self.input = options.pop('input', None) |
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self.timeout = options.pop('timeout', None) |
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default_proc_opts = { |
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'stdin': None, |
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'stdout': subprocess.PIPE, |
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'stderr': subprocess.STDOUT, |
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'universal_newlines': False |
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} |
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default_proc_opts.update(options) |
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options.update(default_proc_opts) |
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if callable(monitor) or isinstance(getattr(media, 'key_rotation'), HLSKeyInfoFile): |
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self.is_monitor = True |
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options.update({ |
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'stdin': subprocess.PIPE, |
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'universal_newlines': True |
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}) |
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self.process = _p_open(commands, **options) |
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self.media = media |
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self.monitor = monitor |
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def __enter__(self): |
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return self |
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def __exit__(self, exc_type, exc_val, exc_tb): |
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self.process.kill() |
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def _monitor(self): |
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""" |
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@TODO: add documentation |
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""" |
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duration = 1 |
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_time = 0 |
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log = [] |
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start_time = time.time() |
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while True: |
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line = self.process.stdout.readline().strip() |
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if line == '' and self.process.poll() is not None: |
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break |
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if line != '': |
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log += [line] |
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if isinstance(getattr(self.media, 'key_rotation'), HLSKeyInfoFile): |
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getattr(self.media, 'key_rotation').rotate_key(line) |
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if callable(self.monitor): |
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duration = get_time('Duration: ', line, duration) |
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_time = get_time('time=', line, _time) |
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self.monitor(line, duration, _time, time_left(start_time, _time, duration), self.process) |
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Process.out = log |
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def _thread_mon(self): |
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""" |
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@TODO: add documentation |
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""" |
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thread = threading.Thread(target=self._monitor) |
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thread.start() |
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thread.join(self.timeout) |
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if thread.is_alive(): |
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self.process.terminate() |
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thread.join() |
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error = 'Timeout! exceeded the timeout of {} seconds.'.format(str(self.timeout)) |
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logging.error(error) |
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raise RuntimeError(error) |
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def run(self): |
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""" |
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@TODO: add documentation |
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""" |
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if self.is_monitor: |
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self._thread_mon() |
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else: |
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Process.out, Process.err = self.process.communicate(self.input, self.timeout) |
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if self.process.poll(): |
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error = str(Process.err) if Process.err else str(Process.out) |
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logging.error('ffmpeg failed to execute command: {}'.format(error)) |
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raise RuntimeError('ffmpeg failed to execute command: ', error) |
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logging.info("ffmpeg executed command successfully") |
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return Process.out, Process.err |
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aminyazdanpanah /
python-ffmpeg-video-streaming
