高速捕获请求Android Marshmallow

Question

高速捕获请求Android Marshmallow

5

我遇到了一些设置高速视频捕获请求的问题。我打算在Nexus 6P上以120 FPS的速度进行捕获。由于我不打算将此应用部署到任何其他手机上，所以我将最低API设置为23。

我还没有完全理解如何使我的捕获请求起作用。目前，我正在尽力更改谷歌样例中的Camera2Video示例代码。链接到Google样例以下是所有相关代码：

private void startPreview() {
    if (null == mCameraDevice || !mTextureView.isAvailable() || null == mPreviewSize) {
        return;
    }
    try {
        setUpMediaRecorder();
        SurfaceTexture texture = mTextureView.getSurfaceTexture();
        assert texture != null;
        texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
        mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
        List<Surface> surfaces = new ArrayList<Surface>();

        Surface previewSurface = new Surface(texture);
        surfaces.add(previewSurface);
        mPreviewBuilder.addTarget(previewSurface);

        Surface recorderSurface = mMediaRecorder.getSurface();
        surfaces.add(recorderSurface);
        mPreviewBuilder.addTarget(recorderSurface);

        mCameraDevice.createConstrainedHighSpeedCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {
        //mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {

            @Override
            public void onConfigured(CameraCaptureSession cameraCaptureSession) {
                //mPreviewSession = cameraCaptureSession;
                mPreviewSession2 = cameraCaptureSession;
                updatePreview();
            }

            @Override
            public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
                Activity activity = getActivity();
                if (null != activity) {
                    Toast.makeText(activity, "Failed", Toast.LENGTH_SHORT).show();
                }
            }
        }, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}


/**
 * Update the camera preview. {@link #startPreview()} needs to be called in advance.
 */
private void updatePreview() {
    if (null == mCameraDevice) {
        return;
    }
    try {
        setUpCaptureRequestBuilder(mPreviewBuilder);
        HandlerThread thread = new HandlerThread("CameraPreview");
        thread.start();
        mPreviewBuilder2 =  mPreviewSession2.createHighSpeedRequestList(mPreviewBuilder.build());
        //mPreviewBuilder2 =


        //mPreviewSession.setRepeatingRequest(mPreviewBuilder.build(), null, mBackgroundHandler);
        mPreviewSession.setRepeatingBurst(mPreviewBuilder2, null, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch(Exception e){
        e.printStackTrace();
    }
}

private void setUpCaptureRequestBuilder(CaptureRequest.Builder builder) {
    builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
    Range<Integer> fpsRange = Range.create(120, 120);
    builder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, fpsRange);

}

我没有问题更新预览的代码。不幸的是，我遇到了困难，不知道如何给setRepeatingBurst设置我的捕获请求。我知道构造函数与示例的setRepeatingRequest不同。因此，我需要找到一种方式将我的surfaces，CONTROL_MODE请求和TARGET_FPS_RANGE请求传递给setRepeatingBurst。

/**
 * Camera preview.
 */
private CaptureRequest.Builder mPreviewBuilder;
List<CaptureRequest> mPreviewBuilder2;

/**
 * A reference to the current {@link android.hardware.camera2.CameraCaptureSession} for
 * preview.
 */
private CameraCaptureSession mPreviewSession;
private CameraConstrainedHighSpeedCaptureSession mPreviewSession2;

任何帮助我弄清如何使其正确工作的建议都将非常有用。我在网上没有找到太多帮助，StackOverflow中也没有提到任何高速捕获功能的文章。我的最大问题是尝试理解createConstrainedHighSpeedCaptureSession如何提供CameraConstrainedHighSpeedCaptureSession会话，以便我可以使用createHighSpeedRequestList。

- JParrish88

1个回答

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- sleort · Accepted Answer

我有类似的问题，但是通过你的问题已经解决了。

在你的情况下，如果调用以下代码应该可以解决：

mPreviewSession2.setRepeatingBurst(mPreviewBuilder2, null, mBackgroundHandler);

相较于

mPreviewSession.setRepeatingBurst(mPreviewBuilder2, null, mBackgroundHandler);

由于您正在将RepeatingBurst设置为CameraConstrainedHighSpeedCaptureSession，因此需要进行翻译。

我创建了一个Github存储库，展示了如何使用camera2 api创建高速录制会话。

https://github.com/thesleort/Android-Slow-Motion-Camera2.git