使用MediaRecorder录制时，水平“条”而不是视频

主题A：水平酒吧

这是一个奇怪的。 视频记录和声音很好，但那些酒吧代表我的手。 这就好像我正在寻找一个带肋的pyrex碗：

主题B：

我正在使用前置摄像头（API 16）在Samsung Galaxy Note 10.1上测试此功能。 一些说明：

当我使用背面照相机录制时，它录制得很好。

当我在标准相机应用程序中使用前置摄像头进行录制时，它可以正常工作。

当我在三星Galaxy S4（API 21）上运行相同的代码时，后置和前置摄像头都可以正常工作。

我使用CamcorderProfile来选择适当的MediaRecorder设置。 这是我的代码：

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private boolean prepareVideoRecorder() {
    // Get screen width and height for supported video sizes
    Display display = getWindowManager().getDefaultDisplay();
    int width, height;

    if (Build.VERSION.SDK_INT < 13) {
        width = display.getWidth();
        height = display.getHeight();
    } else {
        Point size = new Point();
        display.getSize(size);
        width = size.x;
        height = size.y;
    }

    // Check and set the highest quality available recording profile of the camera.
    int frontCamera = Camera.CameraInfo.CAMERA_FACING_FRONT;
    CamcorderProfile profile = null;

    if (CamcorderProfile.hasProfile(frontCamera, CamcorderProfile.QUALITY_1080P))
        profile = CamcorderProfile.get(frontCamera, CamcorderProfile.QUALITY_1080P);
    else if (CamcorderProfile.hasProfile(frontCamera, CamcorderProfile.QUALITY_720P))
        profile = CamcorderProfile.get(frontCamera, CamcorderProfile.QUALITY_720P);
    else if (CamcorderProfile.hasProfile(frontCamera, CamcorderProfile.QUALITY_480P))
        profile = CamcorderProfile.get(frontCamera, CamcorderProfile.QUALITY_480P);
    else if (CamcorderProfile.hasProfile(frontCamera, CamcorderProfile.QUALITY_HIGH))
        profile = CamcorderProfile.get(frontCamera, CamcorderProfile.QUALITY_HIGH);

    mCamera = CameraHelper.getDefaultFrontFacingCameraInstance();

    // Need to make sure that our recording video size is supported by the camera.
    // Query camera to find all sizes and choose the optimal size given the dimensions of screen.
    Camera.Parameters parameters = mCamera.getParameters();
    List<Camera.Size> mSupportedVideoSizes = parameters.getSupportedVideoSizes();
    Camera.Size optimalSize = CameraHelper.getOptimalRecordingSize(mSupportedVideoSizes,
            width, height);

    // link camera to preview surface
    try {
        mCamera.setPreviewDisplay(mPreview.getHolder());
    } catch (IOException e) {
        Log.e(TAG, "Surface text is unavailable or unsuitable for preview" + e.getMessage());
        return false;
    }

    // Unlock the camera to allow the Media Recorder to own it
    mCamera.unlock();

    // Create and assign the Camera to the Media Recorder
    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setCamera(mCamera);

    // Set Sources
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

    if (profile != null) {
        profile.videoFrameWidth = optimalSize.width;
        profile.videoFrameHeight = optimalSize.height;
        mMediaRecorder.setProfile(profile);
    }

    // Specify the output file
    mMediaRecorder.setOutputFile(CameraHelper.getOutputMediaFile(
            CameraHelper.MEDIA_TYPE_VIDEO).toString());

    // Prepare configured MediaRecorder
    try {
        mMediaRecorder.prepare();
    } catch (IllegalStateException e) {
        Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    } catch (IOException e) {
        Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage());
        releaseMediaRecorder();
        return false;
    }
    return true;
}

我尝试绕过CamcorderProfile并尝试使用每个MediaRecorder.VideoEncoder编码器。 文件格式是.mp4，我不相信这是问题，因为设备上的标准Camera应用程序输出.mp4。 有任何想法吗？

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