generated from pavel.muhortov/template-bash
298 lines
12 KiB
Python
298 lines
12 KiB
Python
#!/usr/bin/env python3
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from multiprocessing import Process, Queue
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from os import path, environ
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from subprocess import Popen, PIPE, STDOUT
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from sys import platform
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from time import sleep
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class Proc:
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"""
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Find a running process from Python
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"""
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@classmethod
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def _list_windows(cls) -> list:
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"""
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Find all running process with wmi
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:return: list of dictionaries with descriptions of found processes
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"""
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execlist = []
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separate = b'\r\r\n'
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out, err = Popen(['wmic', 'process', 'get', 'CommandLine,ExecutablePath,Name,ProcessId', '/format:list'],
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stdout=PIPE, stderr=PIPE).communicate()
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for line in out.split(separate + separate):
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execpid, exename, exepath, cmdline = None, None, None, None
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for subline in line.split(separate):
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if b'ProcessId=' in subline:
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execpid = subline.split(b'=')[1].decode('utf-8')
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if b'Name=' in subline:
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exename = subline.split(b'=')[1].decode('utf-8')
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if b'ExecutablePath=' in subline:
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exepath = subline.split(b'=')[1].decode('utf-8')
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if b'CommandLine=' in subline:
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cmdline = subline.split(b'=')[1].decode('utf-8')
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if execpid and exename:
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execlist.append({'execpid': execpid, 'exename': exename, 'exepath': exepath, 'cmdline': cmdline})
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return execlist
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@classmethod
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def _list_linux(cls) -> list:
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"""
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Find all running process with ps
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:return: list of dictionaries with descriptions of found processes
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"""
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execlist = []
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out, err = Popen(['/bin/ps', '-eo', 'pid,args'], stdout=PIPE, stderr=PIPE).communicate()
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for line in out.splitlines():
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execpid = line.split()[0].decode('utf-8')
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exepath = line.split()[1].decode('utf-8')
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exename = path.basename(exepath)
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cmdline = line.split(None, 1)[1].decode('utf-8')
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if execpid and exename:
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execlist.append({'execpid': execpid, 'exename': exename, 'exepath': exepath, 'cmdline': cmdline})
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return execlist
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@classmethod
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def list(cls) -> list:
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"""
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Find all running process
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:return: list of dictionaries with descriptions of found processes
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"""
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if platform.startswith('linux') or platform.startswith('darwin'):
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return cls._list_linux()
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elif platform.startswith('win32'):
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return cls._list_windows()
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else:
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return None
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@classmethod
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def search(cls, find: str, exclude: str = None) -> list:
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"""
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Find specified processes
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:param find: find process pid, name or arguments
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:param exclude: exclude process pid, name or arguments
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:return: list of dictionaries with descriptions of found processes
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"""
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proc_found = []
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try:
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for proc in cls.list():
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if exclude and (exclude in proc['execpid'] or exclude in proc['exename'] or
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exclude in proc['exepath'] or exclude in proc['cmdline']):
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pass
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elif find in proc['execpid'] or find in proc['exename'] or \
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find in proc['exepath'] or find in proc['cmdline']:
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proc_found.append(proc)
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except TypeError as ex:
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print('ON', platform, 'PLATFORM', 'search ERROR:', ex)
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finally:
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if len(proc_found) == 0:
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return None
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else:
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return proc_found
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@classmethod
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def kill(cls, pid: int) -> None:
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"""
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Kill the process by means of the OS
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:param pid: process ID
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:return: None
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"""
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if platform.startswith('linux') or platform.startswith('darwin'):
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Popen(['kill', '-s', 'SIGKILL', str(pid)])
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elif platform.startswith('win32'):
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Popen(['taskkill', '/PID', str(pid), '/F'])
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class FFmpeg:
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"""
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FFmpeg management from Python
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"""
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@classmethod
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def run(cls, src: str, preset: str = None, fps: int = None, dst: str = None,
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ffpath: str = None, watchdog: bool = False, sec: int = 5, mono: bool = False) -> None:
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"""
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Running the installed ffmpeg
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:param src: sources urls (example: "rtsp://user:pass@host:554/Streaming/Channels/101, anull")
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:param preset: 240p, 360p, 480p, 720p, 1080p, 1440p, 2160p
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:param fps: frame per second encoding output
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:param dst: destination url (example: rtp://239.0.0.1:5554)
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:param ffpath: alternative path to bin (example: /usr/bin/ffmpeg)
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:param watchdog: detect ffmpeg freeze and terminate
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:param sec: seconds to wait before the watchdog terminates
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:param mono: detect ffmpeg running copy and terminate
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:return: None
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"""
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process = cls._bin(ffpath).split()+cls._src(src).split()+cls._preset(preset, fps).split()+cls._dst(dst).split()
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if mono and Proc.search(' '.join(process)):
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print('Process already exist, exit...')
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else:
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with Popen(process, stdout=PIPE, stderr=STDOUT) as proc:
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que = None
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if watchdog:
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que = Queue()
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Process(target=cls._watchdog, args=(proc.pid, sec, que,), daemon=True).start()
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for line in proc.stdout:
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if not que:
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print(line, flush=True)
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else:
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que.put(line)
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exit()
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@classmethod
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def _bin(cls, path_ffmpeg: str) -> str:
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"""
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Returns the path to the ffmpeg depending on the OS
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:param path_ffmpeg: alternative path to bin
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:return: path to ffmpeg
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"""
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faq = ('\n'
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'Main download page: https://ffmpeg.org/download.html\n'
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'\n'
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'Install on Linux (Debian):\n'
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'\tsudo apt install -y ffmpeg\n'
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'\tTarget: /usr/bin/ffmpeg\n'
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'\n'
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'Install on Windows:\n'
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'\tDownload and extract archive from: https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-full.7z\n'
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'\tTarget: "%PROGRAMFILES%\\ffmpeg\\bin\\ffmpeg.exe"\n'
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'\n'
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'Install on MacOS:\n'
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'\tDownload and extract archive from: https://evermeet.cx/ffmpeg/\n'
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'\tTarget: /usr/bin/ffmpeg\n')
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if not path_ffmpeg:
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if platform.startswith('linux') or platform.startswith('darwin'):
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path_ffmpeg = '/usr/bin/ffmpeg'
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elif platform.startswith('win32'):
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path_ffmpeg = environ['PROGRAMFILES'] + "\\ffmpeg\\bin\\ffmpeg.exe"
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if path.exists(path_ffmpeg):
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return path_ffmpeg
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else:
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print('ON', platform, 'PLATFORM', 'not found ffmpeg', faq)
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return None
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@classmethod
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def _src(cls, sources: str) -> list:
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"""
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Parsing sources into ffmpeg format
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:param sources: comma-separated list of sources in string format
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:return: ffmpeg format list of sources
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"""
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list_sources = []
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for src in sources.split(','):
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src = src.strip()
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if 'null' in src:
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src = ' '.join(['-f lavfi -i', src])
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elif 'rtsp' in src:
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src = ' '.join(['-rtsp_transport tcp -i', src])
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else:
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src = ' '.join(['-stream_loop -1 -re -i', src])
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list_sources.append(src)
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return ' '.join(list_sources)
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@classmethod
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def _preset(cls, choice: str, fps: int) -> str:
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"""
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Parsing preset into ffmpeg format
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:param choice: preset selection
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:param fps: frame per second encoding output
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:return: ffmpeg format encoding parameters
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"""
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tune = '-tune zerolatency'
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video = '-c:v copy'
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audio = '-c:a aac -b:a 128k'
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width, height, kbps = None, None, None
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if choice:
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if choice == '240p':
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width, height, kbps = 426, 240, 480
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if choice == '360p':
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width, height, kbps = 640, 360, 720
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if choice == '480p':
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width, height, kbps = 854, 480, 1920
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if choice == '720p':
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width, height, kbps = 1280, 720, 3960
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if choice == '1080p':
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width, height, kbps = 1920, 1080, 5940
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if choice == '1440p':
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width, height, kbps = 2560, 1440, 12960
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if choice == '2160p':
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width, height, kbps = 3840, 2160, 32400
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if width and height and kbps:
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video = ''.join(['-vf scale=', str(width), ':', str(height), ',setsar=1:1'])
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video = ' '.join([video, '-c:v libx264 -pix_fmt yuv420p -preset ultrafast'])
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if fps:
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video = ' '.join([video, '-r', str(fps), '-g', str(fps * 2)])
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video = ' '.join([video, '-b:v', str(kbps) + 'k'])
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return ' '.join([tune, video, audio])
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@classmethod
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def _dst(cls, destination: str) -> str:
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"""
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Parsing destination into ffmpeg format
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:param destination:
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:return: ffmpeg format destination
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"""
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container = '-f null'
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stdout = '-v debug' # '-nostdin -nostats' # '-report'
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if destination:
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if 'rtmp' in destination:
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container = '-f flv'
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elif "rtp" in destination:
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container = '-f rtp_mpegts'
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else:
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destination = '-'
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return ' '.join([container, destination, stdout])
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@classmethod
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def _watchdog(cls, pid: int, sec: int = 5, que: Queue = None) -> None:
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"""
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If no data arrives in the queue, kill the process
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:param pid: process ID
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:param sec: seconds to wait for data
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:param que: queue pointer
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:return: None
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"""
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if que:
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while True:
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while not que.empty():
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print(que.get())
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sleep(sec)
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if que.empty():
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Proc.kill(pid)
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print('exit by watchdog')
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break
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exit()
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if __name__ == "__main__":
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from argparse import ArgumentParser
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args = ArgumentParser(
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prog='streaming',
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description='FFmpeg management from Python',
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epilog='Dependencies: '
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'Python 3 (tested version 3.9.5 on Debian GNU/Linux 11), '
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'ffmpeg (tested version 4.3.4 on Debian GNU/Linux 11)'
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)
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args.add_argument('-s', '--src', type=str, required=True,
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help='sources urls (example: "rtsp://user:pass@host:554/Streaming/Channels/101, anull")')
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args.add_argument('--preset', type=str, default=None, required=False,
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help='240p, 360p, 480p, 720p, 1080p, 1440p, 2160p')
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args.add_argument('--fps', type=int, default=None, required=False,
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help='frame per second encoding output')
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args.add_argument('--dst', type=str, default=None, required=False,
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help='destination url (example: rtp://239.0.0.1:5554)')
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args.add_argument('--ffpath', type=str, default=None, required=False,
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help='alternative path to bin (example: /usr/bin/ffmpeg)')
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args.add_argument('--watchdog', action='store_true', required=False,
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help='detect ffmpeg freeze and terminate')
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args.add_argument('--sec', type=int, default=15, required=False,
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help='seconds to wait before the watchdog terminates')
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args.add_argument('--mono', action='store_true', required=False,
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help='detect ffmpeg running copy and terminate')
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args = vars(args.parse_args())
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FFmpeg.run(src=args['src'], preset=args['preset'], fps=args['fps'], dst=args['dst'],
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ffpath=args['ffpath'], watchdog=args['watchdog'], sec=args['sec'], mono=args['mono'])
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