Question

我想找到视频文件的持续时间。为此，我使用了以下命令。它是Desktop中的工作文件。在android中运行时显示错误。我还附上错误消息。谁能告诉我为什么它不起作用？

execFFmpegBinary("-i "+file.getAbsolutePath()+" 2>&1 | find \"Duration\"");

//Function used to run command
private static void execFFmpegBinary(final String command)
{
    try
    {
        ffmpeg.execute(command, new ExecuteBinaryResponseHandler()
        {
            @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 " + command);
                Log.d(TAG, "progress : " + s);
            }

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

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

错误消息：

[NULL @ 0xac11acd0] Unable to find a suitable output format for '2>&1'
                2>&1: Invalid argument

命令无法在Android中查找视频文件的持续时间？

0 个答案: