在Android中使用FFMPEG編碼

Question

我成功爲Android編譯ffmpeg，但我不知道如何以編程方式將flv或mp4文件轉換爲mp3，但我需要它。任何人都可以幫助我的例子或教程？謝謝。

Answer 1

如何使用FFmpeg的二進制編譯通過CLI的Android，採用ProcessBuilder一個很好的例子，可以在這裏找到：

https://github.com/guardianproject/android-ffmpeg-java/blob/master/src/org/ffmpeg/android/FfmpegController.java

注方法：

private int execProcess(String cmd, ShellCallback sc, File fileExec) throws IOException, InterruptedException { 

    ProcessBuilder pb = new ProcessBuilder(cmd); 
    pb.directory(fileExec); 

    Log.d(TAG,cmd); 

    // pb.redirectErrorStream(true); 
    Process process = pb.start(); 


    // any error message? 
    StreamGobbler errorGobbler = new 
    StreamGobbler(process.getErrorStream(), "ERROR", sc); 

    // any output? 
    StreamGobbler outputGobbler = new 
    StreamGobbler(process.getInputStream(), "OUTPUT", sc); 

    // kick them off 
    errorGobbler.start(); 
    outputGobbler.start(); 

    int exitVal = process.waitFor(); 

    sc.processComplete(exitVal); 

    return exitVal; 
}