如何从视频中提取音频 [英] how to extract audio from video

问题描述

我正在开发一个可以下载不同格式视频的安卓应用.它做得很完美.

I am working on an android app that can download videos in different formats.It done perfectly.

现在我想从下载的视频文件或可用的视频链接中提取音频.有没有办法通过以下任何一种方法从视频中提取音频

Now i want to extract audio from downloaded video file or available video link. Is there any way to extract audio from video by any of the following methods

1.直接从视频文件链接中提取音频

1.extract audio directly from a video file link

或

2.有没有适合android从视频文件中提取音频的库

2.is there any library that suitable for android to extract audio from a video files

感谢您的时间！

推荐答案

您可以使用名为 JAVE(Java 音频视频编码器)的库将视频编码为音频文件.

You can use a library called JAVE (Java Audio Video Encoder) to encode a video into an audio file.

1. 从此处下载 JAVE.
2. 参考下面的代码片段从 MP4 编码到 MP3

代码:

File source = new File("source.mp4");
File target = new File("target.mp3");

AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setCodec("libmp3lame")
    .setBitRate(new Integer(128000))
    .setChannels(new Integer(2))
    .setSamplingRate(new Integer(44100));
EncodingAttributes encodingAttributes = new EncodingAttributes();
encodingAttributes.setFormat("mp3")
    .setAudioAttributes(audioAttributes);

Encoder encoder = new Encoder();
encoder.encode(source, target, encodingAttributes); 

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