Gain limited to 4
daingster opened this issue · comments
Hi, I am using a rpi high quality camera on RPI 3+ (Yes I know, need to upgrade to 4 someday)
The camera is used in a dark room. When I start the camera manually, I set the gain to 20 or it's too dark
libcamera-still --gain 20
The gain in the application is limited between 0 and 4. It's too dark even at 4. Could it be possible to get to a higher value?
Thank you for your great application, makes a really user-friendly baby monitor.
Hey @daingster
thanks for your comment. The RPI3 is fine as long as the app works. It also has a lower power consumption than the RPI4. 👍
A gain of 20 is really high. Does the camera work without adjustments in daylight? To make sure, there is no hardware problem - did you try to adjust the aperture at your lens?
https://www.google.com/url?sa=t&source=web&rct=j&url=https://static.raspberrypi.org/files/product-guides/Typical_CS-Mount_Lens_Guide.pdf&ved=2ahUKEwjL36ud5ar8AhXFhP0HHUXYBeUQFnoECBkQAQ&usg=AOvVaw2_35uJP_pArW9eKbmuynBb
If you are using it in complete darkness as a baby monitor and you start with 20. What do you suggest as the upper limit for the slider? I couldn't find the upper limit of the libcamera. Is 30 already completely white in your setup?
Hey @daingster
I created a new release and increased the gain to 100.
https://github.com/Lillifee/raspiCam/releases/tag/v1.3.2
It seems the libcamera apps handle the gain differently than the old raspistill.
Thanks for the feedback, and let me know if you encounter more problems.
Wow that was quick. Thank you so much, works fine now at gain 20.
I am actually using this lens. The aperture is wide open, but still pretty dark.
https://www.waveshare.com/8-50mm-zoom-lens-for-pi.htm
I find libcamera to render a more fluid preview, but darker than raspistill on my current hardware. The latter had an -ISO parameter that I used all the time.
Thank you for your great software