稀有摄像机记​​录中的视频亮度下降（暗淡）

Question

为什么在罕见相机的视频录制过程中亮度会降低？图像很好。

下面是我准备视频的mediarecorder的代码。请帮忙

td

mVideoMediaRecorder.setOutputFile（mVideoPath）;

try {
        // Step 1: Unlock and set camera to MediaRecorder
        mCamera.unlock();
        mVideoMediaRecorder.setCamera(mCamera);
        // Step 2: Set sources
        mVideoMediaRecorder.setAudioSource     (MediaRecorder.AudioSource.CAMCORDER);
        mVideoMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

        // Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
        mVideoMediaRecorder.setProfile(CamcorderProfile.get(mCurrentCameraId, CamcorderProfile.QUALITY_HIGH));
        mVideoMediaRecorder.setVideoSize(mCameraPreview.getVideoSize().width, mCameraPreview.getVideoSize().height);