File to test the buffer size for os.read. Requires humanize to be installed. See here for license: https://chand1012.mit-license.org/

buffersize.py

import os
import sys
import humanize

file_path = sys.argv[1]

size = os.path.getsize(file_path)
print(f'Size in bytes: {humanize.naturalsize(size, binary=True)}')

video = os.open(file_path, os.O_RDONLY)


video_buffer = os.read(video, size)
print(f'Video buffer size: {humanize.naturalsize(sys.getsizeof(video_buffer), binary=True)}')

# Call like so: python3 buffersize.py /path/to/file.mp4