如何解析Microphone无限时长录制，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
这里提供一个解决思路：
1、将microphone设置为循环录制，即：
Microphone.Start(micName, true,2,16000);
2、每隔一定间隔读取录制好的数据，并将它缓存起来。
这里值得一提的是，如果每隔2秒保存一下音频数据（因为我设置的录制时间是2秒），
因为代码运行也需要时间，会导致音频数据损坏，声音会出现明显的断层现象，所以这里将它分段保存就能解决这种问题，
当麦克风录制的位置大于音频的一半的时候，保存上一段音频，当麦克风录制完时，保存后一段音频。
bool isSaveFirstHalf = true;//将音频从中间分生两段，然后分段保存 int micPosition; while (!isMicRecordFinished) { if (isSaveFirstHalf) { yield return new WaitUntil(() => { micPosition = Microphone.GetPosition(micName);return micPosition > length * 6 / 10 && micPosition < length; });//保存前半段 micDataTemp = new float[length / 2]; micClip.GetData(micDataTemp, 0); micDataList.AddRange(micDataTemp); isSaveFirstHalf = !isSaveFirstHalf; } else { yield return new WaitUntil(() => { micPosition = Microphone.GetPosition(micName); return micPosition > length / 10 && micPosition < length / 2; });//保存后半段 micDataTemp = new float[length/2]; micClip.GetData(micDataTemp, length / 2); micDataList.AddRange(micDataTemp); isSaveFirstHalf = !isSaveFirstHalf; } }
最后处理一下结束时的音频
micPosition = Microphone.GetPosition(micName); if (micPosition <= length)//前半段 { micDataTemp = new float[micPosition/2]; micClip.GetData(micDataTemp, 0); } else { micDataTemp = new float[micPosition - length/2]; micClip.GetData(micDataTemp, length/2); }
3、最后通过保存的数据生成新的音频，即：
AudioClip.Create("RecordClip", micDataList.Count, 1, 16000, false); newAudioClip.SetData(micDataList.ToArray(), 0);
完整代码如下：
using System;using System.Collections;using System.Collections.Generic;using UnityEngine;public class MicUnlimitedDuration : MonoBehaviour {public delegate void AudioRecordHandle(AudioClip audioClip);public AudioSource audioSource;AudioClip micClip;bool isMicRecordFinished= true;List<float> micDataList = new List<float>();float[] micDataTemp;string micName;public void StartMicrophone() {StopCoroutine(StartMicrophone(null, PlayAudioRecord));StartCoroutine(StartMicrophone(null, PlayAudioRecord));}IEnumerator StartMicrophone(string microphoneName,AudioRecordHandle audioRecordFinishedEvent) {Debug.Log("Start Mic");micDataList = new List<float>();micName = microphoneName;micClip = Microphone.Start(micName, true,2,16000);isMicRecordFinished = false;int length = micClip.channels * micClip.samples;bool isSaveFirstHalf = true;//将音频从中间分生两段，然后分段保存int micPosition;while (!isMicRecordFinished){if (isSaveFirstHalf){yield return new WaitUntil(() => { micPosition = Microphone.GetPosition(micName);return micPosition > length * 6 / 10 && micPosition < length; });//保存前半段micDataTemp = new float[length / 2];micClip.GetData(micDataTemp, 0);micDataList.AddRange(micDataTemp);isSaveFirstHalf = !isSaveFirstHalf;}else{yield return new WaitUntil(() => { micPosition = Microphone.GetPosition(micName); return micPosition > length / 10 && micPosition < length / 2; });//保存后半段micDataTemp = new float[length/2];micClip.GetData(micDataTemp, length / 2);micDataList.AddRange(micDataTemp);isSaveFirstHalf = !isSaveFirstHalf;}}micPosition = Microphone.GetPosition(micName);if (micPosition <= length)//前半段{micDataTemp = new float[micPosition/2];micClip.GetData(micDataTemp, 0);}else{micDataTemp = new float[micPosition - length/2];micClip.GetData(micDataTemp, length/2);}micDataList.AddRange(micDataTemp);Microphone.End(micName);AudioClip newAudioClip = AudioClip.Create("RecordClip", micDataList.Count, 1, 16000, false);newAudioClip.SetData(micDataList.ToArray(), 0);audioRecordFinishedEvent(newAudioClip);Debug.Log("RecordEnd");}public void StopMicrophone(){Debug.Log("Stop mic");isMicRecordFinished = true;}void PlayAudioRecord(AudioClip newAudioClip){audioSource.clip = newAudioClip;audioSource.Play();}}
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