Android视频录制功能的实现步骤

官方使用指南请查看Google音频和视频指南

视频录制基本步骤

1.申明权限

 <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <--如果录制的视频保存在外部SD卡，还需要添加以下权限->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

注意：RECORD_AUDIO为危险权限，从Android 6.0开始（API级别23）开始，需要动态获取。

2.视频录制参数配置

import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.text.TextUtils;

/**
 * @author Created by LRH
 * @description 视频录制参数（参数可自行拓展）
 * @date 2021/1/19 13:54
 */
public class VideoRecorderConfig {
	//Camera
    private Camera camera;
    //摄像头预览宽度
    private int videoWidth;
    //摄像头预览高度
    private int videoHeight;
    //摄像头预览偏转角度
    private int cameraRotation;
    //保存的文件路径
    private String path;
    //由于Camera使用的是SurfaceTexture，所以这里使用了SurfaceTexture
    //也可使用SurfaceHolder
    private SurfaceTexture mSurfaceTexture;
    
    private int cameraId = 0;

    public SurfaceTexture getSurfaceTexture() {
        return mSurfaceTexture;
    }

    public void setSurfaceTexture(SurfaceTexture surfaceTexture) {
        mSurfaceTexture = surfaceTexture;
    }

    public Camera getCamera() {
        return camera;
    }

    public void setCamera(Camera camera) {
        this.camera = camera;
    }

    public int getVideoWidth() {
        return videoWidth;
    }

    public void setVideoWidth(int videoWidth) {
        this.videoWidth = videoWidth;
    }

    public int getVideoHeight() {
        return videoHeight;
    }

    public void setVideoHeight(int videoHeight) {
        this.videoHeight = videoHeight;
    }

    public int getCameraRotation() {
        return cameraRotation;
    }

    public void setCameraRotation(int cameraRotation) {
        this.cameraRotation = cameraRotation;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public int getCameraId() {
        return cameraId;
    }

    public void setCameraId(int cameraId) {
        this.cameraId = cameraId;
    }

    public boolean checkParam() {
        return mSurfaceTexture != null && camera != null && videoWidth > 0 && videoHeight > 0 && !TextUtils.isEmpty(path);
    }
}

3.视频录制接口封装（使用MediaRecorder）

import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Build;
import android.view.Surface;

import com.emp.yjy.baselib.utils.LogUtils;
import java.io.IOException;

/**
 * @author Created by LRH
 * @description
 * @date 2021/1/19 13:53
 */
public class VideoRecorder {
    private static final String TAG = "VideoRecord";
    private MediaRecorder mRecorder;

    public VideoRecorder() {

    }

    /**
     * 开始录制
     *
     * @param config
     * @return
     */
    public boolean startRecord(VideoRecorderConfig config, MediaRecorder.OnErrorListener listener) {
        if (config == null || !config.checkParam()) {
            LogUtils.e(TAG, "参数错误");
            return false;
        }
        if (mRecorder == null) {
            mRecorder = new MediaRecorder();
        }
        mRecorder.reset();
        if (listener != null) {
            mRecorder.setOnErrorListener(listener);
        }

        config.getCamera().unlock();
        mRecorder.setCamera(config.getCamera());
        //设置音频通道
//        mRecorder.setAudioChannels(1);
        //声音源
//        AudioSource.DEFAULT:默认音频来源
//        AudioSource.MIC:麦克风（常用）
//        AudioSource.VOICE_UPLINK:电话上行
//        AudioSource.VOICE_DOWNLINK:电话下行
//        AudioSource.VOICE_CALL:电话、含上下行
//        AudioSource.CAMCORDER:摄像头旁的麦克风
//        AudioSource.VOICE_RECOGNITION:语音识别
//        AudioSource.VOICE_COMMUNICATION:语音通信
        mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
        //视频源
        mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

        try {
            //推荐使用以下代码进行参数配置
            CamcorderProfile bestCamcorderProfile = getBestCamcorderProfile(config.getCameraId());
            mRecorder.setProfile(bestCamcorderProfile);
        } catch (Exception e) {
            //设置输出格式
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            //声音编码格式
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
            //视频编码格式
            mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
        }

        //设置视频的长宽
        mRecorder.setVideoSize(config.getVideoWidth(), config.getVideoHeight());
//        设置取样帧率
        mRecorder.setVideoFrameRate(30);
//        mRecorder.setAudioEncodingBitRate(44100);
//        设置比特率（比特率越高质量越高同样也越大）
        mRecorder.setVideoEncodingBitRate(800 * 1024);
//        这里是调整旋转角度（前置和后置的角度不一样）
        mRecorder.setOrientationHint(config.getCameraRotation());
//        设置记录会话的最大持续时间（毫秒）
        mRecorder.setMaxDuration(15 * 1000);
        //设置输出的文件路径
        mRecorder.setOutputFile(config.getPath());
        //设置预览对象（可以使用SurfaceHoler代替）
        mRecorder.setPreviewDisplay(new Surface(config.getSurfaceTexture()));
        //预处理
        try {
            mRecorder.prepare();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        //开始录制
        mRecorder.start();
        return true;
    }

    /**
     * 停止录制
     */
    public void stopRecord() {
        if (mRecorder != null) {
            try {
                mRecorder.stop();
                mRecorder.reset();
                mRecorder.release();
                mRecorder = null;
            } catch (Exception e) {
                e.printStackTrace();
                LogUtils.e(TAG, e.getMessage());
            }

        }
    }

    /**
     * 暂停录制
     *
     * @return
     */
    public boolean pause() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && mRecorder != null) {
            mRecorder.pause();
            return true;
        }
        return false;
    }

    /**
     * 继续录制
     *
     * @return
     */
    public boolean resume() {
        if (mRecorder != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            mRecorder.resume();
            return true;
        }
        return false;
    }
}

public CamcorderProfile getBestCamcorderProfile(int cameraID){
		CamcorderProfile profile = CamcorderProfile.get(cameraID, CamcorderProfile.QUALITY_LOW);
		if(CamcorderProfile.hasProfile(cameraID, CamcorderProfile.QUALITY_480P)){
			//对比下面720 这个选择 每帧不是很清晰
			profile = CamcorderProfile.get(cameraID, CamcorderProfile.QUALITY_480P);
			profile.videoBitRate = profile.videoBitRate/5;
			return profile;
		}
		if(CamcorderProfile.hasProfile(cameraID, CamcorderProfile.QUALITY_720P)){
			//对比上面480 这个选择 动作大时马赛克!!
			profile = CamcorderProfile.get(cameraID, CamcorderProfile.QUALITY_720P);
			profile.videoBitRate = profile.videoBitRate/35;
			return profile;
		}
		if(CamcorderProfile.hasProfile(cameraID, CamcorderProfile.QUALITY_CIF)){
			profile = CamcorderProfile.get(cameraID, CamcorderProfile.QUALITY_CIF);
			return profile;
		}
		if(CamcorderProfile.hasProfile(cameraID, CamcorderProfile.QUALITY_QVGA)){
			profile = CamcorderProfile.get(cameraID, CamcorderProfile.QUALITY_QVGA);
			return profile;
		}
		return profile;
	}

3.使用示例

public void recordVideo(CustomCameraView CameraView) {
        VideoRecorderConfig config = new VideoRecorderConfig();
        String path = App.sGlobalContext.getExternalFilesDir("video").getAbsolutePath() + File.separator + "test1.mp4";
        config.setCamera(CameraView.getCamera());
        config.setCameraRotation(CameraView.getCameraRotation());
        config.setVideoHeight(CameraView.getCameraSize().height);
        config.setVideoWidth(CameraView.getCameraSize().width);
        config.setPath(path);
        config.setSurfaceTexture(CameraView.getSurfaceTexture());
        config.setCameraId(0);
        VideoRecorder record = new VideoRecorder();
        boolean start = record.startRecord(config, null);
        int duration = 15_000;
        while (duration > 0) {
            if (duration == 10_000) {
                boolean pause = record.pause();
                LogUtils.e(TAG, "暂停录制" + pause);
            }
            if (duration == 5_000) {
                boolean resume = record.resume();
                LogUtils.e(TAG, "重新开始录制" + resume);
            }
            SystemClock.sleep(1_000);
            duration -= 1_000;
        }

        record.stopRecord();
        LogUtils.d(TAG, "停止录制");
    }

其中CustomCameraView为自己封装的相机库

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