Re: Questions about image size listed in VIDIOC_ENUM_FMT

[Zhaoxuan Zhai <zhai.zhaoxuan@canonical.com>]

Hi all,

Sorry I made a mistake. It should be VIDIOC_ENUM_FRAMESIZES instead of 
VIDIOC_ENUM_FMT. I'm sorry for the mistake.

在 2025/2/14 12:08, Zhaoxuan Zhai 写道:
> Hi all,
>
> We are working on a camera driver. We plan to use v4l2 interface to 
> send image data to users. We have a question we'd like to ask.
>
> The situation we are facing is as follows.
>
> We have an image processing unit that can process raw data collected 
> by the sensor into the V4L2_PIX_FMT_NV12M format and send it to the user.
>
> However, due to the requirements of the V4L2_PIX_FMT_NV12M format, the 
> width and height of the image must be divisible by 16.
>
> For example, when the sensor provides an image size of 2104x1560, 
> after NV12M encoding, it should be pading to  2112x1566. But the 
> additional 8 rows and 8 columns are padded with 0s and contain no 
> actual content.
>
> So, we would like to ask, in this case, what size should we list in 
> VIDIOC_ENUM_FMT? Should it be the actual image size with content, 
> 2104x1560, or the padded size, 2112x1566?"
>
>
> Thank you,
>
> Zhaoxuan
>