Android Question Threading library and Camera2 preview

[peacemaker]

HI, All

There is an idea to use threading library with getting the preview frames from Camera2 code, to avoid preview interface freezing while each image is being got by a timer.
Can it help ?

 

[Erel]

Might help however it will be difficult to implement it correctly.

It will be simpler to use CameraEx which is faster in this case.

 

[peacemaker]

simpler to use CameraEx which is faster in this case

What do you mean more excactly, Erel ?
What else excepting .GetPreviewBitmap can CameraEx2 help ?
Question of this topic is that getting preview bitmap makes camera's preview freezing.

 

[Erel]

Google Vision works better with the preview frames coming from CameraEx. They don't need to be copied and the raw data doesn't need to converted to a Bitmap object.

With that said, the problem in your code is probably related to the huge preview size you are using.

 

[peacemaker]

Google Vision works better with the preview frames coming from CameraEx

Yes ! I know and use it now with FullHD frames it works OK each ~0.25 sec.
But there is a need to have max camera settings control via Camera2 API. But it's slower now (just getting FullHD frame bitmap is ~0.45 sec, without Vision work), and not usable as freezing. Camera1 code does not freeze visually at all.

So, question is to move fully to Camera2 API from Camera v.1 API, without any troubles.

Maybe CameraEx2 can provide the byte data for Vision? It seems, it may be, but the same slow, anyway conversion from the tv View.

 

[Erel]

Currently Camera2 doesn't support accessing the raw preview data.

 

[peacemaker]

But how to use Camera2 API without interface freezing during working with GetPreviewBitmap?

 

[Erel]

It is not possible.

 

[peacemaker]

ImageReader of Camera2 has some handler, to be used in second thread for frames processing, they told.
What is CameraX ?

 

[Erel]

What is CameraX ?

CameraX is a new Google SDK based on Camera2. I did check it a few weeks ago and it was in beta state and unstable. It will be wrapped at some point.

 

[mjcoon]

Hi, has anyone heard of progress with this? (I have only just discovered CameraX.)