concat - 使用FFmpeg的音頻文件在上面的Android 5.1中不起作用

Question

我正在使用FFmpeg將三個音頻文件結合成一個

1. audio.m4a（從資產中獲取）
2. 錄制的audio.m4a（使用MediaRecorder錄制）
3. audio.m4a（從資產中獲取）

它在Android 5.1以下工作正常，但不能在Android 5.1以上工作，在5.1以上錄制的音頻文件不能連續（當我從保存的內部存儲器播放時它的播放效果不好而不是損壞的錄音）。

我使用以下命令來連接音頻文件。

File mergedFile = new File(cacheDir + "/" + String.format("merged_file_%s.m4a", System.currentTimeMillis()));

final String[] ffmpegCommand = new String[]{ /* this concat only 1st audio*/
            "ffmpeg",
            "-f",
            "concat",
            "-i",
            list, /* text file which contains full path of audio files*/
            "-c",
            "copy",
            mergedFile.toString()};


    final String[] ffmpegCommand = new String[]{  /*its working but not concat recorded file*/
            "-y",
            "-i",
            "concat:" + getStaticFilePath() + "|" + getRecordedFilePath() + "|" + getStaticFilePath(),
            "-c",
            "copy",
            mergedFile.toString()};


    FFmpeg ffmpeg = FFmpeg.getInstance(this);
    try {
        ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
            @Override
            public void onFailure() {
                showUnsupportedExceptionDialog();
            }
        });
    } catch (FFmpegNotSupportedException e) {
        showUnsupportedExceptionDialog();
    }

    try {
        ffmpeg.execute(ffmpegCommand, new FFmpegExecuteResponseHandler() {
            @Override
            public void onFailure(String s) {
                Log.d(TAG, "FAILED with output : " + s);

            }

            @Override
            public void onSuccess(String s) {
                Log.d(TAG, "SUCCESS with output : " + s);
            }

            @Override
            public void onProgress(String s) {
                Log.d(TAG, "Started command : ffmpeg " + ffmpegCommand);
            }

            @Override
            public void onStart() {

                Log.d(TAG, "Started command : ffmpeg " + ffmpegCommand);
                Log.d(TAG, "Processing...");
            }

            @Override
            public void onFinish() {
                Log.d(TAG, "Finished command : ffmpeg " + ffmpegCommand);
            }
        });
    } catch (FFmpegCommandAlreadyRunningException e) {
        // do nothing for now
    } 

list是一個文本文件，包含我連接的所有音頻的路徑

#ffmpeg.txt
file '/storage/emulated/0/AudioRecorder/radioStatic.m4a'
file '/storage/emulated/0/AudioRecorder/recordedFile.m4a'
file '/storage/emulated/0/AudioRecorder/radioStatic.m4a'

Answer 1

這對我有用

  val cmd = arrayOf("-y", "-i", audio1!!.path, "-i", audio2!!.path, "-filter_complex"," 
   [0:a] [1:a] concat=n=2:v=0:a=1 [a]","-map","[a]", "-c:a","mp3", outputLocation.path)