How to implement audio recording and sound processing in uniapp

UniApp is a cross-platform development framework based on Vue.js, which can help developers generate applications for multiple platforms at the same time based on one coding, including iOS, Android, H5, etc. . To implement audio recording and sound processing functions in UniApp, you need to use the uni-extend plug-in and uni-audio components.

First, in your UniApp project, you need to install the uni-extend plug-in. Open a command line window, switch to your project directory, and run the following command to install the uni-extend plug-in:

npm install uni-extend

After the installation is complete, create a new JS file in your project, such as audio.js , used to handle the logic of audio recording and sound processing. In audio.js, we need to introduce the uni-extend plug-in and uni-audio component, and also need to introduce the uni.showToast method to display prompt information.

import { ChooseImage, SaveImage } from 'uni-extend';
import { showToast } from 'uni-audio';

export default {
  methods: {
    // 音频录制
    startRecord() {
      uni.showToast({
        title: '开始录音',
        icon: 'none'
      });

      uni.startRecord({
        success: (res) => {
          const tempFilePath = res.tempFilePath;
          this.stopRecord(tempFilePath);
        },
        fail: (err) => {
          uni.showToast({
            title: '录音失败',
            icon: 'none'
          });
        }
      });
    },
    // 停止录音
    stopRecord(tempFilePath) {
      uni.stopRecord();
      this.showAudio(tempFilePath);
    },
    // 播放录音
    playAudio() {
      uni.showToast({
        title: '开始播放',
        icon: 'none'
      });

      uni.playVoice({
        filePath: this.audioSrc,
        success: () => {
          uni.showToast({
            title: '播放完成',
            icon: 'none'
          });
        },
        fail: () => {
          uni.showToast({
            title: '播放失败',
            icon: 'none'
          });
        }
      });
    },
    // 显示录音
    showAudio(tempFilePath) {
      this.audioSrc = tempFilePath;
    },
    // 声音处理
    processAudio() {
      uni.showToast({
        title: '声音处理完毕',
        icon: 'none'
      });
    }
  }
}

In the above code, the startRecord method is used to start recording, call the uni.startRecord method to start recording, and call the stopRecord method to stop recording after successful recording. In the stopRecord method, call the uni.stopRecord method to stop recording, and pass the tempFilePath of the recording file to the showAudio method to display the recording.

The playAudio method is used to play recordings, and calls the uni.playVoice method to play the path of the recording file. The processAudio method is used for sound processing. Here you can add audio processing logic according to specific needs.

Finally, you need to use these methods in your Vue page. In the <script> tag of the page, introduce the audio.js file and register it as a method in methods.

<script>
import audio from '@/audio';

export default {
  methods: {
    ...audio.methods
  }
}
</script>

In <template> of the page, use the uni-audio component to display and control the playback of the recording:

<template>
  <view>
    <button @click="startRecord">开始录音</button>
    <button @click="playAudio">播放录音</button>
    <button @click="processAudio">声音处理</button>
    <uni-audio :src="audioSrc" v-if="audioSrc"></uni-audio>
  </view>
</template>

The above is how to implement audio recording in UniApp and specific examples of sound processing. By combining the uni-extend plug-in and uni-audio components, we can easily implement audio recording and sound processing functions in UniApp. Of course, in actual development, you may also need to perform some error handling and other logic processing. The above code is just a simple example, and you can modify and expand it according to your own needs.

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