将下面ffmpeg命令写成python执行代码并输出python3代码ffmpeg -i 1mp4 -empty_hdlr_name 1 -metadatasv0 language=jpn -metadatasa0 language=jpn -c copy -dispositionv1 attached_pic outputmp4

import subprocess

subprocess.call(['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'])