FFmpeg cut video in chunks

ffmpeg_cut_video_in_chunks.py

import sys
import os
from pathlib import Path

CHUNK_LENGTH = 59


def cut_chunks(file_name=None, resize=False):
    if not file_name:
        print("enter file name")
        return
    file_name = Path(file_name)
    if not file_name.exists():
        print(f"file [{file_name.name}] not found")
        return
    ffprobe_command = (
        f"ffprobe.exe -v error -show_entries format=duration "
        f'-of default=noprint_wrappers=1:nokey=1 "{file_name.absolute()}"'
    )
    print(ffprobe_command)
    file_duration = float(os.popen(ffprobe_command).read())
    print(f"file duration {file_duration}")
    start = 0.0
    count = 0
    resize_string = ""
    if resize:
        resize_string = "-vf scale=1080x1920:flags=lanczos "
    while start <= file_duration:
        os.system(
            f'ffmpeg -y -ss {start} -i "{file_name}" -t {CHUNK_LENGTH}'
            "-c:v libx264"
            f'{resize_string} "{file_name.stem}"_scaled_chunk{count:02}.mp4'
        )
        start += CHUNK_LENGTH
        count += 1
    if count:
        print(f"File cut in {count} chunks")


if __name__ == "__main__":
    if len(sys.argv) > 1:
        files = sys.argv[1:]
        for file in files:
            cut_chunks(file)