Python——初识音频剪辑

#!/usr/bin/env python3.6
# -*- coding: utf-8 -*-
# @Time    : 2019-09-01 10:25
# @Author  : Ed Frey
# @File    : clips.py
# @Software: PyCharm

from pydub import AudioSegment
from moviepy.editor import *

def slice(start,end,input_path,output_path):
    '''
    to cut a slice of audio needed, from start time to end time ，unit is millisecond.
    :param start:
    :param end:
    :param input_path:
    :param output_path:
    :return:
    '''
    input_music = AudioSegment.from_mp3(input_path)
    output_music = input_music[start:end]
    output_music.export(output_path, format="mp3")
    # print(len(output_music), output_music.channels)
    
    
def merge(output_path,input_path_list=[]):
    '''
    to merge different slices in path_list together by order
    :param output_path:
    :param path_list:
    :return:
    '''
    if input_path_list is None:
        return None
    playlist = AudioSegment.empty()
    for sound in input_path_list:
        input_music = AudioSegment.from_mp3(sound)
        playlist += input_music
    playlist.export(output_path, format="mp3")
    # print(len(playlist), playlist.channels)
    # 如果需要对音频做封面、填写专辑名称、作者信息，可以用下方的格式输出
    # output_music.export("/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/combine_3.mp3", format="mp3", bitrate="192k",
    # tags={"album": "专辑名称", "artist": "歌手"}, cover="/photo.jpeg")
    return True

def speedup(input_path,output_path,rate):
    '''
    to speedup video playing.
    :param input_path:
    :param output_path:
    :param rate:
    :return:
    '''
    mp3 = VideoFileClip(input_path)
    result = mp3.fl_time(lambda t:rate*t,apply_to=['mask','video','audio']).set_end(mp3.end/rate)
    result.write_videofile(output_path)

if __name__=="__main__":

    input_path = "/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/jingwei.mp3"
    output_path = "/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/output1.mp3"
    start = 183000
    end = 238600

    slice(start,end,input_path,output_path)

# merge(output_path,path_list=["/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/output1.mp3",
#                              "/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/output2.mp3",
#                              "/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/output3.mp3",
#                              "/Users/Ed_Frey/Desktop/mp3_cut/audio_clip/output4.mp3"])
#