一些Android设备前置摄像头录像神器问题怎么解决？

Question

举个例子，下面是一段由三星Galaxy S3录制的视频截图：

有怪异的神器和颜色，视频似乎并不居中（它是指着一个人的脸，你可以看到在镜头中只是勉强可见）。

这是我的代码：

//
// starting code
//

CAMERA = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);
Camera.Parameters cameraParameters = CAMERA.getParameters();
if (cameraParameters.isZoomSupported()) {
    cameraParameters.setZoom(0);
}
CAMERA.setParameters(cameraParameters);
CAMERA.setDisplayOrientation(90);

CAMERA.setPreviewDisplay(CAMERA_SURFACE_VIEW.getHolder());
CAMERA.startPreview();
CAMERA.unlock();

CAMERA_MEDIA_RECORDER = new MediaRecorder();
CAMERA_MEDIA_RECORDER.setCamera(CAMERA);
try {
    CAMERA_MEDIA_RECORDER.setOrientationHint(270);
} catch (Exception e) {
    // this is to fix "setParameter failed" b/c of unsupported orientation hint
    CAMERA_MEDIA_RECORDER.setOrientationHint(90);
}
CAMERA_MEDIA_RECORDER.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
CAMERA_MEDIA_RECORDER.setVideoSource(MediaRecorder.VideoSource.CAMERA);

ArrayList<Integer> profileIds = new ArrayList<Integer>();

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
    profileIds.add(CamcorderProfile.QUALITY_480P);
    profileIds.add(CamcorderProfile.QUALITY_720P);
}

profileIds.add(CamcorderProfile.QUALITY_HIGH);
profileIds.add(CamcorderProfile.QUALITY_LOW);

CamcorderProfile camcorderProfile = null;

for (int profileId : profileIds) {
    try {
        camcorderProfile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, profileId);
        break; // found our most desired profile, done
    } catch (IllegalArgumentException e) {
        // profile not found on device... It's okay, the next one might exist.
        continue;
    } catch (RuntimeException e) {
        continue;
    }
}

if (camcorderProfile == null) {
    return false;
}

CAMERA_MEDIA_RECORDER.setProfile(camcorderProfile);
CAMERA_MEDIA_RECORDER.setAudioEncodingBitRate(96000);

int audioSamplingRate = 44100;

for (int rate : new int[] {44100, 32000, 22050, 16000, 11025, 8000}) {
    if (AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_IN_DEFAULT, AudioFormat.ENCODING_PCM_16BIT) > 0) {
        audioSamplingRate = rate;
        break;
    }
}

CAMERA_MEDIA_RECORDER.setAudioSamplingRate(audioSamplingRate);
CAMERA_MEDIA_RECORDER.setVideoEncodingBitRate(700000);

String extension = ".3gpp";

if (camcorderProfile.fileFormat == MediaRecorder.OutputFormat.MPEG_4) {
    extension = ".mp4";
}

File file = new File(Internal.getStoragePath(Internal.CURRENT_ACTIVITY) + "/webcam" + extension);
file.createNewFile();

CAMERA_MEDIA_RECORDER.setOutputFile(file.toString());
CAMERA_MEDIA_RECORDER.setPreviewDisplay(CAMERA_SURFACE_VIEW.getHolder().getSurface());

CAMERA_MEDIA_RECORDER.prepare();
CAMERA_MEDIA_RECORDER.start();

//
// stopping code
//

try {
    CAMERA_MEDIA_RECORDER.stop();
} catch (IllegalStateException e) {
    // do nothing
} catch (RuntimeException e) {
    // do nothing
}

CAMERA_MEDIA_RECORDER.reset();
CAMERA_MEDIA_RECORDER.release();

CAMERA.lock();
CAMERA.stopPreview();
CAMERA.release();

CAMERA_MEDIA_RECORDER = null;
CAMERA = null;
CAMERA_SURFACE_VIEW = null;

编辑：我应该指出surfaceView是1乘1像素，超出了屏幕的界限。我不希望显示预览。

如何确保所有带有前置摄像头的设备上的视频记录良好？

Answer 1

“接受”的答案只是一个变通办法，并不能解决问题，因为当您释放预览并开始录制时，缩放或方面可能会发生变化，因为MediaCorder调整预览表面以适应实际需要，所以当您点击录制时，镜头的取景会发生变化，这是不可取的。正确的做法是将预览大小设置为与录制大小的纵横比一致，以便MediaCorder得到它所期望的表面。