63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
import os
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import shutil
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import subprocess
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def ffmpeg_suitability(path):
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try:
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version = subprocess.run([path, "-version"], check=True,
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capture_output=True).stdout.decode("utf-8")
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except:
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return 0
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score = 0
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# rough layout of the importance of various features
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simple_criterion = [("libvpx", 20), ("264", 10), ("265", 3),
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("svtav1", 5), ("libopus", 1)]
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for criterion in simple_criterion:
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if version.find(criterion[0]) >= 0:
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score += criterion[1]
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# obtain rough compile year from copyright information
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copyright_index = version.find('2000-2')
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if copyright_index >= 0:
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copyright_year = version[copyright_index + 6:copyright_index + 9]
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if copyright_year.isnumeric():
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score += int(copyright_year)
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return score
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def get_ffmpeg_path():
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if "VHS_FORCE_FFMPEG_PATH" in os.environ:
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ffmpeg_path = os.environ.get("VHS_FORCE_FFMPEG_PATH")
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else:
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ffmpeg_paths = []
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try:
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from imageio_ffmpeg import get_ffmpeg_exe
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imageio_ffmpeg_path = get_ffmpeg_exe()
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ffmpeg_paths.append(imageio_ffmpeg_path)
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except:
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if "VHS_USE_IMAGEIO_FFMPEG" in os.environ:
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raise
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if "VHS_USE_IMAGEIO_FFMPEG" in os.environ:
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ffmpeg_path = imageio_ffmpeg_path
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else:
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system_ffmpeg = shutil.which("ffmpeg")
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if system_ffmpeg is not None:
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ffmpeg_paths.append(system_ffmpeg)
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if os.path.isfile("ffmpeg"):
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ffmpeg_paths.append(os.path.abspath("ffmpeg"))
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if os.path.isfile("ffmpeg.exe"):
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ffmpeg_paths.append(os.path.abspath("ffmpeg.exe"))
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if len(ffmpeg_paths) == 0:
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ffmpeg_path = None
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elif len(ffmpeg_paths) == 1:
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# Evaluation of suitability isn't required, can take sole option
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# to reduce startup time
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ffmpeg_path = ffmpeg_paths[0]
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else:
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ffmpeg_path = max(ffmpeg_paths, key=ffmpeg_suitability)
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return ffmpeg_path
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