Adjust framerate and shutter speed separtly

watchever

Hello, is it possible to set separetly framerate and shutter speed ? When I set shutter speed it seems to erase my framerate settings and the same happens when I set framerate, it seems shutter speed setting is erased.
Can you confirm and let me know if it is possible to keep the two settings ?
I want to get the best light sensitivity possible, testing on VEYE 327 and 462.
Thanks

veye_xumm

@watchever
Please tell me which command you use to configure framerate and which command to configure shutter?

watchever

@veye_xumm I use mshutter for shutter speed and lowlight for framerate.

veye_xumm

@watchever

I have to say lowlight is not a method to adjust framerate. It's a exposure time parameter.

Note that the set value is the minimum frame rate value and the actual frame rate value is affected by the automatic exposure algorithm.

If you want to drop some frames, try nodf.

watchever

@veye_xumm thanks, if I well understand nodf ignore some frames but not really reduce the material framerate. Am I wrong ?

Thanks

watchever

Is there a way to fully deactivate the auto exposure algorithm ? I think when I manually set mshutter it it the case ?

veye_xumm

@watchever

@watchever said in Adjust framerate and shutter speed separtly:

if I well understand nodf ignore some frames but not really reduce the material framerate. Am I wrong ?
Thanks

You are right.

veye_xumm

@watchever said in Adjust framerate and shutter speed separtly:

Is there a way to fully deactivate the auto exposure algorithm ? I think when I manually set mshutter it it the case ?

This statement is partially correct. The exposure time will be fully manual by setting mshutter, but gain is still automatic. You can set agc to 0 to force the automatic adjustment of gain to be turned off.

watchever

@veye_xumm thanks, I really need to reduce pixel refesh rate on the material side, is it possible ?

veye_xumm

@watchever said in Adjust framerate and shutter speed separtly:

I really need to reduce pixel refesh rate on the material side, is it possible ?

It's not supported for VEYE series.
CS series support this feature.

watchever

@veye_xumm yes but CS series don't have same sensor and are not as sensitive as VEYE series (especially 462 and 327).
Is it a material limit or could be solved by a development on your side : add a specific register to set framerate ? Thanks

veye_xumm

@watchever
Sorry, this can not be modified. IMX307 is slightly worse than 327 low illumination, but the actual difference is not very large.