Python 如何利用ffmpeg 处理视频素材

ffmpeg -version

ffmpeg -i [filename] -ss [starttime] -t [length] -c copy [newfilename]

import subprocess as sp

def cut_video(filename, outfile, start, length=90):
    cmd = "ffmpeg -i %s -ss %d -t %d -c copy %s" % (filename, start, length, outfile)
    p = sp.Popen(cmd, shell=True)
    p.wait()
    return

pip install ffmpy3

import ffmpy3
ff = ffmpy3.FFmpeg(
     inputs={'input.mp4': None},
     outputs={'output.avi': None}
     )
ff.run()

ff = FFmpeg(
    inputs={'input.ts': None},
    outputs={'output.mp4': '-c:a mp2 -mpeg2video'}
)
ff.cmd
ff.run()

ff = FFmpeg(
    inputs={'input.ts': None},
    outputs={
         'video.mp4': ['-map', '0:0', '-c:a', 'copy', '-f', 'mp4'],
         'audio.mp4': ['-map', '0:1', '-c:a', 'copy', '-f', 'mp4']
     }
 )
ff.cmd
ff.run()

from collections import OrderedDict
inputs = OrderedDict([('video.mp4', None), ('audio_1.mp3', None), ('audio_2.mp3', None)])
outputs = {'output.ts', '-map 0 -c:v h264 -map 1 -c:a:0 ac3 -map 2 -c:a:1 mp2'}
ff = FFmpeg(inputs=inputs, outputs=outputs)
ff.cmd
ff.run()

import ffmpy3
ff = ffmpy3.FFmpeg(
     inputs={'data.MP4': None},
     outputs={'1/%d.png': None}
     )
ff.run()