将下面ffmpeg命令写成python执行代码ffmpeg -i 1mp4 -empty_hdlr_name 1 -metadatasv0 language=jpn -metadatasa0 language=jpn -c copy -dispositionv1 attached_pic outputmp4

import subprocess

command = ["ffmpeg", "-i", "1.mp4", "-empty_hdlr_name", "1", "-metadata:s:v:0", "language=jpn", "-metadata:s:a:0", "language=jpn", "-c", "copy", "-disposition:v:1", "attached_pic", "output.mp4"]

subprocess.call(command)