Python AudioSegment.from_flv方法代码示例

# 需要导入模块: from pydub import AudioSegment [as 别名]
# 或者: from pydub.AudioSegment import from_flv [as 别名]
    def exportMonoWav(self, fileName):
        ext = self.getFileType(fileName)
        if ext == 'wav':
            pre = AS.from_wav(fileName)
        elif ext == 'mp3':
            pre = AS.from_mp3(fileName)
        elif ext == 'ogg':
            pre = AS.from_ogg(fileName)
        elif ext == 'flv':
            pre = AS.from_flv(fileName)
        else:
            pre = AS.from_file(fileName)

        # set mono & 
        pre = pre.set_channels(1)
        #pre = pre.set_frame_rate(22050)

        fout = self.getFileName(fileName) + '_AS_MONO_WAV_44100.wav'
        pre.export(fout, format='wav')

        return fout

# 需要导入模块: from pydub import AudioSegment [as 别名]
# 或者: from pydub.AudioSegment import from_flv [as 别名]
def file_to_audio_source(filename, filetype=None, **kwargs):
    
    lower_fname = filename.lower()
    rawdata = False
    
    if filetype is not None:
        filetype = filetype.lower()
    
    if filetype == "raw" or (filetype is None and lower_fname.endswith(".raw")):
        
        srate = kwargs.pop("sampling_rate", None)
        if srate is None:
            srate = kwargs.pop("sr", None)
            
        swidth = kwargs.pop("sample_width", None)
        if swidth is None:
            swidth = kwargs.pop("sw", None)
        
        ch = kwargs.pop("channels", None)
        if ch is None:
            ch = kwargs.pop("ch", None)
        
        if None in (swidth, srate, ch):
            raise Exception("All audio parameters are required for raw data") 
        
        data = open(filename).read()
        rawdata = True
        
    # try first with pydub
    if WITH_PYDUB:
        
        use_channel = kwargs.pop("use_channel", None)
        if use_channel is None:
            use_channel = kwargs.pop("uc", None)
        
        if use_channel is None:
            use_channel = 1
        else:
            try:
                use_channel = int(use_channel)
            except ValueError:
                pass
        
        if not isinstance(use_channel, (int)) and not use_channel.lower() in ["left", "right", "mix"] :
            raise ValueError("channel must be an integer or one of 'left', 'right' or 'mix'")
        
        asegment = None
        
        if rawdata:
            asegment = AudioSegment(data, sample_width=swidth, frame_rate=srate, channels=ch)
        if filetype in("wave", "wav") or (filetype is None and lower_fname.endswith(".wav")):
            asegment = AudioSegment.from_wav(filename)
        elif filetype == "mp3" or (filetype is None and lower_fname.endswith(".mp3")):
            asegment = AudioSegment.from_mp3(filename)
        elif filetype == "ogg" or (filetype is None and lower_fname.endswith(".ogg")):
            asegment = AudioSegment.from_ogg(filename)
        elif filetype == "flv" or (filetype is None and lower_fname.endswith(".flv")):
            asegment = AudioSegment.from_flv(filename)
        else:
            asegment = AudioSegment.from_file(filename)
            
        if asegment.channels > 1:
            
            if isinstance(use_channel, int):
                if use_channel > asegment.channels:
                    raise ValueError("Can not use channel '{0}', audio file has only {1} channels".format(use_channel, asegment.channels))
                else:
                    asegment = asegment.split_to_mono()[use_channel - 1]
            else:
                ch_lower = use_channel.lower()
                
                if ch_lower == "mix":
                    asegment = asegment.set_channels(1)
                    
                elif use_channel.lower() == "left":
                    asegment = asegment.split_to_mono()[0]
                    
                elif use_channel.lower() == "right":
                    asegment = asegment.split_to_mono()[1]
        
        return BufferAudioSource(data_buffer = asegment._data,
                                     sampling_rate = asegment.frame_rate,
                                     sample_width = asegment.sample_width,
                                     channels = asegment.channels)
    # fall back to standard python
    else:
        if rawdata:
            if ch != 1:
                raise ValueError("Cannot handle multi-channel audio without pydub")
            return BufferAudioSource(data, srate, swidth, ch)
    
        if filetype in ("wav", "wave") or (filetype is None and lower_fname.endswith(".wav")):
            
            wfp = wave.open(filename)
            
            ch = wfp.getnchannels()
            if ch != 1:
                wfp.close()
                raise ValueError("Cannot handle multi-channel audio without pydub")
           
#.........这里部分代码省略.........

# 需要导入模块: from pydub import AudioSegment [as 别名]
# 或者: from pydub.AudioSegment import from_flv [as 别名]
# coding: utf-8

# sudo apt-get install ffmpeg
# sudo apt-get install pydub

from pydub import AudioSegment

# 加载一个wav文件
song = AudioSegment.from_wav("never_gonna_give_you_up.wav")

# 加载一个MP3文件
song = AudioSegment.from_mp3("never_gonna_give_you_up.mp3")

# 加载其它格式的文件
ogg_version = AudioSegment.from_ogg("never_gonna_give_you_up.ogg")
flv_version = AudioSegment.from_flv("never_gonna_give_you_up.flv")

mp4_version = AudioSegment.from_file("never_gonna_give_you_up.mp4", "mp4")
wma_version = AudioSegment.from_file("never_gonna_give_you_up.wma", "wma")
aac_version = AudioSegment.from_file("never_gonna_give_you_up.aiff", "aac")

# 音频切片
# pydub 是以毫秒为单位进行处理
ten_seconds = 10 * 1000  # 十秒

first_10_seconds = song[:ten_seconds]

last_5_seconds = song[-5000:]

# 使开始的时候音量更大，结束时更小
# 开始的时候增加 6dB

# 需要导入模块: from pydub import AudioSegment [as 别名]
# 或者: from pydub.AudioSegment import from_flv [as 别名]
def convertFromFlv(inpath, outpath):
    sound = AudioSegment.from_flv(inpath)
    sound.export(outpath, format="wav")