JavaCV的摄像头实战之七：推流(带声音)

import javax.sound.sampled.AudioSystem;

import javax.sound.sampled.DataLine;

import javax.sound.sampled.TargetDataLine;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.ShortBuffer;

import java.util.concurrent.ScheduledThreadPoolExecutor;

import java.util.concurrent.TimeUnit;

/**

• @author willzhao

• @version 1.0

• @description 音频相关的服务

• @date 2021/12/3 8:09

*/

@Slf4j

public class AudioService {

// 采样率

private final static int SAMPLE_RATE = 44100;

// 音频通道数，2表示立体声

private final static int CHANNEL_NUM = 2;

// 帧录制器

private FFmpegFrameRecorder recorder;

// 定时器

private ScheduledThreadPoolExecutor sampleTask;

// 目标数据线，音频数据从这里获取

private TargetDataLine line;

// 该数组用于保存从数据线中取得的音频数据

byte[] audioBytes;

// 定时任务的线程中会读此变量，而改变此变量的值是在主线程中，因此要用volatile保持可见性

private volatile boolean isFinish = false;

/**

• 帧录制器的音频参数设置

• @param recorder

• @throws Exception

*/

public void setRecorderParams(FrameRecorder recorder) throws Exception {

this.recorder = (FFmpegFrameRecorder)recorder;

// 码率恒定

recorder.setAudioOption(“crf”, “0”);

// 最高音质

recorder.setAudioQuality(0);

// 192 Kbps

recorder.setAudioBitrate(192000);

// 采样率

recorder.setSampleRate(SAMPLE_RATE);

// 立体声

recorder.setAudioChannels