public void startRecord() {mediarecorder = new MediaRecorder();// 创建mediarecorder对象mCamera = getCameraInstance();Parameters parameters = mCamera.getParameters(); mCamera.autoFocus(null);// 解锁cameramCamera.setDisplayOrientation(90);mCamera.unlock();mediarecorder.setCamera(mCamera);List<Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes(); for(int i=0;i<supportedPreviewSizes.size();i++){Log.v("startRecord", "width="+supportedPreviewSizes.get(i).width+";height="+supportedPreviewSizes.get(i).height);}// 设置录制视频源为Camera(相机)
//        mediarecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);// 设置录制文件质量，格式，分辨率之类，这个全部包括了
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_480P));  //7.43M  10frame
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_1080P));   //70.94M  10frame
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_CIF));  // 2.6M  5frame/10frame
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_QCIF));  //0.76M   30frame  模糊
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_QVGA));  //2.1M
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_TIME_LAPSE_CIF));  //不支持
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_LOW));  //766KB  还行  比QUALITY_QCIF好
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_TIME_LAPSE_LOW));  //1M 质量类似LOW
//        mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_TIME_LAPSE_480P));  //480p效果
//        mediarecorder.setAudioEncoder(MediaRecorder.AudioEncoder.);
//        mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);//        boolean isSupQUALITY_TIME_LAPSE_CIF = CamcorderProfile.hasProfile(CamcorderProfile.QUALITY_TIME_LAPSE_CIF);
//        boolean isSupQUALITY_LOW = CamcorderProfile.hasProfile(CamcorderProfile.QUALITY_LOW);
//        Log.v("startRecord", "isSupQUALITY_TIME_LAPSE_CIF="+isSupQUALITY_TIME_LAPSE_CIF+";isSupQUALITY_LOW="+isSupQUALITY_LOW);
//
//        mediarecorder.setVideoFrameRate(30);//start实现录像静音
        mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//        mediarecorder.setVideoSize(640,480);mediarecorder.setVideoSize(1280,720);//设置编码比特率,不设置会使视频图像模糊
//        mediarecorder.setVideoEncodingBitRate(5*1024*1024);  //清晰     512*1024(不清楚)mediarecorder.setVideoEncodingBitRate(900*1024); //较为清晰，且文件大小为3.26M(30秒)mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);  //H263的貌似有点不清晰
//        mediarecorder.setVideoFrameRate(10);  //设置无效//end
        mediarecorder.setPreviewDisplay(surfaceHolder.getSurface());// 设置视频文件输出的路径mediarecorder.setOutputFile(Environment.getExternalStorageDirectory().getAbsolutePath() + "/data/data/"+System.currentTimeMillis()+".mp4");try {// 准备录制
            mediarecorder.prepare();// 开始录制
            mediarecorder.start();} catch (Exception e) {e.printStackTrace();}}