How to capture a picture on stm32mp257

[faye_Lee]

Hi ST,

   I need to capture a picture on linux terminal. When I excute this cmd "

v4l2-ctl -d /dev/video3 --set-fmt-video=width=2592,height=1940,pixelformat=YUYV --stream-mmap=3 --stream-skip=3 --stream-to=3.raw --stream-count=1 --stream-poll", the resolution of the picture is smaller than 2592 x 1940. I will attach the picture. What the reason is it? How could I get a full resulotion picture?

 

[Jean-Christophe_TROTIN]

Hi,

 

I could suggest that you have a look at the STM32 MPU wiki (https://wiki.st.com/stm32mpu/wiki/Main_Page).

The following article might be interesting for you:

* https://wiki.st.com/stm32mpu/wiki/STM32MP2_V4L2_camera_overview#Take_a_picture: it explains how to configure the camera subsystem for your use case with media-ctl, how to capture a raw image (with your expected resolution) with v4l-ctl , how to convert it in JPEG with gst-laucnh-1.0 and how to check the picture resolution with gst-typefind.

Reading your post, I’m wondering if the camera subsystem configuration has been successfully executed before the picture capture.

 

Hope this information helps.

 

Regards,

JC.

[faye_Lee]

 Hi  Jean-Christophe_TROTIN,

      Thanks for your suggest. How could I confirm whether camera subsystem configuration has been successfully or not? I was use imx335 to take the picture, which was supported on st-android-13.0.0-2024-07-31-stm32mp257f-ev1 defaultly.

      By the way, does the ISP of STM32MP257 support sensors with a resolution of 4K? We need to port our sensor with a resolution of 4K on stm32mp257f-ev1 Android, and try to get 4K picture from the isp.