android - concat - 使用 FFmpeg 的音频文件无法在 Android 5.1 以上运行

Question

我正在使用 FFmpeg将三个音频文件合并为一个

audio.m4a(从 Assets 中获取)

录制的音频.m4a(使用 MediaRecorder 录制)

audio.m4a(从 Assets 中获取)

它在 Android 5.1 以下工作正常，但在 Android 5.1 以上工作，
在上述 5.1 录制的音频文件中未连接(当我从保存的内部存储中播放时它的播放良好，它没有损坏的录音)。

我正在使用以下命令来连接音频文件。

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
    } 

列表是一个文本文件，包含我连接的所有音频的路径

#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

这对我有用

  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)