split video with moviepy

split_video.py

from moviepy.editor import *
from multiprocessing import Process, Semaphore
import sys

segment_length = float(sys.argv[1])
frames = float(sys.argv[2])
original_video = VideoFileClip("original.mp4")
duration = original_video.duration
clip_start = 0

num = 0

pool_sema = Semaphore(6)


def write_videofile(clip_start, clip_end):
    try:
        clip = VideoFileClip("original.mp4").subclip(clip_start, clip_end).resize((1280, 720))
        print(clip_start, clip_end)
        clip.write_videofile("output_%s.mp4" % num, fps=frames, bitrate="4000k",
                             threads=1, preset='ultrafast', codec='h264')
    except:
        print("error", clip_start, clip_end)
    finally:
        pool_sema.release()


while clip_start < duration:
    clip_end = clip_start + segment_length
    if clip_end > duration:
            clip_end = duration
    pool_sema.acquire()
    p = Process(target=write_videofile, args=(clip_start, clip_end)).start()
    clip_start = clip_end
    num += 1

Really helpful! Thank you.