python利用ffmpeg进行录制屏幕的方法

import subprocess,sys,osimport reclass CutSplicingVdeio(object):  def __init__(self):    pass  #dercription CutSplicingVdeio this class function  def instructions(self):    dercription="vdeio and image transform,vdeio other opreation"    return dercription  def transcribeScreen(self,filePath):    filePath=filePath.decode('utf-8')    cmd=ffmpegPath + " -f gdigrab -framerate 60 -offset_x 0 -offset_y 0 -video_size 1366x768 -i desktop " + filePath    cmd=cmd.encode(sys.getfilesystemencoding())    if "?" in cmd:      cmd=cmd.replace("?","")    print cmd    subprocess.call(cmd , shell=True)vp=CutSplicingVdeio()       vp.transcribeScreen(r"C:/Users/Administrator/Desktop/transcribe.avi")#according to give a video filepath (transcribe Screen)