changing gain/exp time settings while video capture is active

smroid

Hi,

Things are working well for me with ASIStartVideoCapture() active, running ASIGetVideoData() in a capture thread as suggested in the SDK doc.

While this is happening, I find I am able to update the camera's gain and exposure time using ASISetControlValue(). Two questions:

Is this supported?
If yes, when I change the gain or exp time setting, is there a deterministic rule as to how many video data frames I need to consume before the setting change is reflected?

+1 to the idea someone else raised for ASIGetVideoDataEx() that returns settings corresponding to the captured frame.

Context: for calibration purposes, I want to run a sweep of gain/exp time settings, capturing an image for each setting combo. I could use single-image mode (ASIStartExposure() etc.) to obtain an image after each setting change, but video captures are much faster and I'm using video anyway in the rest of my application.

Thanks!
-Steven

ASI120mm mini

Zzzz

smroid Hello ,Steven.
About question 1: That's what we do. That's what we support.
About question 2: Our advice is that consume 1 frame.

About other question: We have no plans for this feature at the moment.But it's a good suggestion, and we'll consider if this feature works.

Looking forward to your reply.

smroid

Thanks. I've empirically found that when changing a setting, I need to discard the next two frames.

Cheers,
-Steven

Zzzz

smroid Hi Steven,That's certainly okay.

Our development team analyzed it and decided that discarding the next one frame would be fine.
Of course, it would be safer to do that discard the next two frames.

Best wishes for you!