203 lines
8.1 KiB
Python
203 lines
8.1 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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from procutil import Proc # or copy class Proc from file procutil.py here for autonomy of this file
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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):
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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):
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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):
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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):
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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):
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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):
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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='FFmpeger',
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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), '
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'installed or downloaded ffmpeg, '
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'procutil.py in the same directory'
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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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