我目前正在使用camera2 api在服务中录制视频。摄像机服务记录
我不能找到一种方法,当预览面被破坏更新camerasession的输出列表。换句话说:当一个表面被销毁时(例如当活动在后台进行时)如何进行以保持记录并避免由于空表面造成的崩溃。
这是我如何开始视频录制。
private void startRecordingVideo() {
if (null == mCameraDevice || null == mPreviewSize) {
return;
}
try {
closePreviewSession();
setUpMediaRecorder();
mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
List<Surface> surfaces = new ArrayList<>();
if(mTextureView !=null) {
SurfaceTexture texture = mTextureView.getSurfaceTexture();
assert texture != null;
texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight()); // Set up Surface for the camera preview
previewSurface = new Surface(texture);
surfaces.add(previewSurface);
mPreviewBuilder.addTarget(previewSurface);
}
// Set up Surface for the MediaRecorder
Surface recorderSurface = mMediaRecorder.getSurface();
surfaces.add(recorderSurface);
mPreviewBuilder.addTarget(recorderSurface);
// Start a capture session
// Once the session starts, we can update the UI and start recording
mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
mPreviewSession = cameraCaptureSession;
updatePreview();
mMediaRecorder.start();
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
Timber.e("Error when creating captureSession");
}
}, mBackgroundHandler);
} catch (CameraAccessException | IOException e) {
e.printStackTrace();
}
}
当我将活动发送到后台时:预览表面被破坏,这是我奋斗的地方。我应该如何更新我的capturesession,以便从会话输出中删除预览表面而不停止捕获进程?