Hi Tomasz,
On 2018年03月01日 16:53, Tomasz Figa wrote:
Hi Shunqian,
On Thu, Mar 1, 2018 at 5:44 PM, Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx> wrote:
Update the register 0x3503 to use 'no delay latch' for gain.
This makes sensor to output the first frame as normal rather
than a very dark one.
I'm not 100% sure on how this setting works, but wouldn't it mean that
setting the gain mid-frame would result in half of the frame having
old gain and another half new? Depending how this works, perhaps we
should set this during initial register settings, but reset after
streaming starts?
Thank you.
I'm not quite sure too. Then I try to change gain during capture by:
capture_10_frames.sh & while sleep .01; do v4l2-ctl -d /dev/video4
--set-ctrl=analogue_gain=54; sleep .01; v4l2-ctl -d /dev/video4
--set-ctrl=analogue_gain=1024; done
The gain setting takes effect for every single frame, not in mid-frame
from my test.
Best wishes,
- Shunqian
Best regards,
Tomasz
