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Use Ffmpeg To Convert Flv To Mp4(or Avi)

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        you should have your ffmpeg path into the environment variables first.
import os
from re import match
path='E:\\blender tutorials\\' #you should change the directory before you run this code.
for f  in files:
    if match('.+\.flv$',f):
        outf=f.replace('.flv','.mp4') #change mp4 to avi if you want avi files.
        os.system(r'ffmpeg.exe -i "%s" "%s"'%(path+f,path+outf))