Python Moviepy dropping CPU used FFMPEG

Question

Would there be any specific reason why my CPU used will drop from 96%-100% to like 30% on average when running this script.

I want it to run @ 100% if possible to process the videos faster. Any help will do thanks in advance.

import moviepy.editor as mp
from moviepy.editor import VideoFileClip, concatenate
import os, glob
from random import randint
from shutil import copyfile

def clipexport():

    video1 = mp.VideoFileClip(clips)
    Duration = video1.duration

    if "sin" in clips:

        try:
            startp = filename[filename.find("sin")+3:filename.find("sin")+6].strip()
            print(startp)
            if "}" in startp:
                startp = startp[:startp.find('}')]
                print(startp)
                start = int(startp)

            else:
                print(startp)
                start = int(startp)
        except:
            start = 0.35
            print('using default start value')

    else:
        start = 0.35
    print(start)

    if "sout" in clips:
        try:
            endp = filename[filename.find("sout")+4:filename.find("sout")+7].strip()
            print(endp)
            if "}" in endp:
                endp = endp[:endp.find('}')]
                print(endp)
                end = int(endp)

            else:
                print(endp)
                end = int(endp)

        except:
            end = Duration - 0.35
            print('using default end value')        

    else:
        end = Duration - 0.35

    print(Duration)
    print(end)
    trimmedvideo = mp.VideoFileClip(clips).subclip(start, end).resize(width=1920)
    trimmedvideo.write_videofile(exportPath, bitrate="8000k", threads="8")

def videocreator():

    calculateClips = 0

    for filename in os.listdir(newpath):
        print(filename)
        if ".mp4" in filename:

            calculateClips = calculateClips + 1

    calculateClips = calculateClips -1

    videolist = []
    videoLength = 0
    totalClips = 0

    for filename in os.listdir(newpath):

        print(filename + "Check Videos")

        if ".mp4" in filename:

            videolist.append(VideoFileClip(newpath + filename).crossfadein(1))

    final = concatenate(videolist, padding=-1, method="compose")
    final.write_videofile('myvideo.mp4', bitrate ='8000k', threads="8")

path = 'C:/TBD/TBD/#Frikkie/'
for infile in glob.glob( os.path.join(path, '**') ):
    if "-" in infile:
        Refno = infile[infile.find('kie')+4:infile.find('-')].strip()

    else:
        Refno = infile[infile.find('kie')+4:].strip()

    print(Refno)
    clippath = infile + "/"
    length = len(clippath)
    #print(length)
    for clips in glob.glob( os.path.join(clippath, '**') ):
        #print(clips)
        filename = clips[clips.find(infile)+length:]
        filename = filename[:filename.find(".")]
        filename = filename + ".mp4"
        print(filename)
        exportPath = infile + "/" + "Export" + "/" + filename
        exportfolder = infile + "/" + "Export"
        print(exportfolder)
        if not os.path.exists(exportfolder):
            os.makedirs(exportfolder)

        try:

            if ".mp4" in clips:

                #clipexport()
                print("done mp4")
            elif ".m4v" in clips:
                #clipexport()
                print("done mp4")
            elif ".MOV" in clips:
                #clipexport()
                print("done mp4")
            else:
                continue


        except:

            print("Error")

    newpath = exportfolder + '/'
    newpath = newpath.replace('/', '\\')
    try:
        mp3number = str(randint(1,5))

        src = ("C:\music\{}.mp3".format(mp3number))
        dst = ("{}{}.mp3".format(newpath, mp3number))

        copyfile(src, dst)

    except:
        print("could not copy mp3")

    print("Mp3 Copied") 
    try:
        print("Video Path = " + newpath)
        videolist= []
        for filename in os.listdir(newpath):

            if "{" in filename:
                 newfilename = filename[:filename.find("{")].strip()
                 newfilename = newfilename + ".mp4"
                 oldfilename = newpath + filename
                 rename = newpath + newfilename
                 os.rename(oldfilename, rename)
                 videolist.append(newfilename)
            else:
                videolist.append(filename)

        for files in videolist:


            if files == "1.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "01.mp4"
                os.rename(oldfilename, rename)

            elif files == "2.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "02.mp4"
                os.rename(oldfilename, rename)

            elif files == "3.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "03.mp4"
                os.rename(oldfilename, rename)

            elif files == "4.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "04.mp4"
                os.rename(oldfilename, rename)

            elif files == "5.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "05.mp4"
                os.rename(oldfilename, rename)

            elif files == "6.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "06.mp4"
                os.rename(oldfilename, rename)

            elif files == "7.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "07.mp4"
                os.rename(oldfilename, rename)

            elif files == "8.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "08.mp4"
                os.rename(oldfilename, rename)

            elif files == "9.mp4":
                print(files)
                oldfilename = newpath + files
                rename = newpath + "09.mp4"
                os.rename(oldfilename, rename)

        print('done')

    except:
        print('not done')
    videocreator()