Android中使用FFmpeg

在阅读这篇文章之前如果你的项目还未配置好FFmpeg的话，请先阅读AndroidStudio中配置FFmpeg

1. 单独提取音频

public static String[] extractAudio(String videoUrl, String outUrl) {
        String[] commands = new String[8];
        commands[0] = "ffmpeg";
        commands[1] = "-i";
        commands[2] = videoUrl;
        commands[3] = "-acodec";
        commands[4] = "copy";
        commands[5] = "-vn";
        commands[6] = "-y";
        commands[7] = outUrl;
        return commands;
    }
videoUrl参数为视频的路径
outUrl参数为存储路径

2. 单独提取视频。没有声音

public static String[] extractVideo(String videoUrl, String outUrl) {
        String[] commands = new String[8];
        commands[0] = "ffmpeg";
        commands[1] = "-i";
        commands[2] = videoUrl;
        commands[3] = "-vcodec";
        commands[4] = "copy";
        commands[5] = "-an";
        commands[6] = "-y";
        commands[7] = outUrl;
        return commands;
    }
videoUrl参数为视频的路径
outUrl参数为存储路径

3. 裁剪音频

 public static String[] cutIntoMusic(String musicUrl, long second, String outUrl) {
        String[] commands = new String[10];
        commands[0] = "ffmpeg";
        commands[1] = "-i";
        commands[2] = musicUrl;
        commands[3] = "-ss";
        commands[4] = "00:00:10";
        commands[5] = "-t";
        commands[6] = String.valueOf(second);
        commands[7] = "-acodec";
        commands[8] = "copy";
        commands[9] = outUrl;
        return commands;
    }
musicUrl参数为音频的路径
outUrl参数为裁剪后的音频路径

4. 原声和背景音乐的合成

  public static String[] composeAudio(String audio1, String audio2, String outputUrl) {
        String[] commands = new String[10];
        commands[0] = "ffmpeg";
        //输入
        commands[1] = "-i";
        commands[2] = audio1;
        //音乐
        commands[3] = "-i";
        commands[4] = audio2;
        //覆盖输出
        commands[5] = "-filter_complex";
        commands[6] = "amix=inputs=2:duration=first:dropout_transition=2";
        commands[7] = "-strict";
        commands[8] = "-2";
        //输出文件
        commands[9] = outputUrl;
        return commands;
    }
audio1参数为原声的路径
audio2参数为背景音乐的路径
outputUrl参数为合成后的路径

5. 修改音频文件的音量

   public static String[] changeAudioOrMusicVol(String audioOrMusicUrl, int vol, String outUrl) 
        String[] commands = new String[8];
        commands[0] = "ffmpeg";
        commands[1] = "-i";
        commands[2] = audioOrMusicUrl;
        commands[3] = "-vol";
        commands[4] = String.valueOf(vol);
        commands[5] = "-acodec";
        commands[6] = "copy";
        commands[7] = outUrl;
        return commands;
    }
audioOrMusicUrl参数为音频路径
vol参数为音频的音量
outUrl参数为修改后音频的路径

6. 音频和视频的合成

public static String[] composeVideo(String videoUrl, String musicOrAudio, String outputUrl, long second) {
        String[] commands = new String[14];
        commands[0] = "ffmpeg";
        //输入
        commands[1] = "-i";
        commands[2] = videoUrl;
        //音乐
        commands[3] = "-i";
        commands[4] = musicOrAudio;
        commands[5] = "-ss";
        commands[6] = "00:00:00";
        commands[7] = "-t";
        commands[8] = String.valueOf(second);
        //覆盖输出
        commands[9] = "-vcodec";
        commands[10] = "copy";
        commands[11] = "-acodec";
        commands[12] = "copy";
        //输出文件
        commands[13] = outputUrl;
        return commands;
    }
videoUrl参数为视频路径
musicOrAudio参数为音频路径
outputUrl参数为合成后的路径
second参数为时间

非常感谢大家的阅读，这些代码基本就可以满足简单的视频和音频的处理，有些人会有疑问该如何使用上面编写的这些代码呢？不着急，后续会出如何使用的文章，请需要的人关注留意。