Hello,

Le 04/03/2018 à 11:23, david bensoussan a écrit :

Hello, I'm currently working with a RPI 3 in 64 bit os.

I have the issue that the image captured is cropped. I don't know where it comes from but I'm exploring all possibilities. Note that it works perfectly on a 32 bits os with same versions of v4l, kernel, libc and everything. The system is generated with Yocto so I'm 100% sure the versions don't change.

I don't think the kernel plays a big role here and my knowledge about it is not significant enough to dig into the image capture calls easily. I tried using musl instead of libc but results are similar. I don't need to enable quirks to fetch the image when using it but the cropped image is exactly the same.

Here is the system configuration:

• Kernel 4.9.52
• v4l 1.14.2
• usb camera with uvcvideo driver

Would you know how I could know V4l is not causing such issue?

This list is closed since it is linked to the v4l2 library helper that is discontinued.

You should post your request on the main mailing-list: linux-media@vger.kernel.org http://vger.kernel.org/vger-lists.html#linux-media (https://www.linuxtv.org/lists.php)

And you should mention the model of USB camera you are using; perhaps something specific to your hardware is involved in the bug...

Regards,

Thierry