ffmpeg-noxfile.py

import nox
from pathlib import Path

PROJECT_ROOT_DIR = Path(__file__).parent
PROJECT_BIN_DIR = PROJECT_ROOT_DIR / "bin"
FFMPEG_DIR = PROJECT_BIN_DIR / "ffmpeg-stable"

DOWNLOAD_COMPRESSED_FILE = "ffmpeg-git-amd64-static.tar.xz"
DOWNLOAD_URL = "https://johnvansickle.com/ffmpeg/builds/" + DOWNLOAD_COMPRESSED_FILE
FFMPEG_BIN = FFMPEG_DIR / "ffmpeg"


@nox.session(python=False)
def ffmpeg(session):
    """
     Downloads and runs ffmpeg stable binary. 
     """
    if not PROJECT_BIN_DIR.exists():
        PROJECT_BIN_DIR.mkdir(exist_ok=True)

    if not FFMPEG_DIR.exists():
        FFMPEG_DIR.mkdir(exist_ok=True)

    if not FFMPEG_BIN.exists():
        session.run("wget", "--verbose", "--no-clobber", DOWNLOAD_URL, external=True)
        session.run(
            "tar",
            "-xf",
            DOWNLOAD_COMPRESSED_FILE,
            "-C",
            str(FFMPEG_DIR),
            "--strip-components",
            "1",
            external=True,
        )
        session.run("rm", DOWNLOAD_COMPRESSED_FILE, external=True)

    session.run(FFMPEG_BIN, "-version")