Camera board • Re: Cannot enumerate frame intervals for Pi camera

So, my questions are:
[*]Should the VIDIOC_ENUM_FRAMEINTERVALS query be returning a valid value?

No. There are two mechanisms for configuring frame interval/rate as documented at https://www.kernel.org/doc/html/latest/ ... figuration. WIth libcamera you're interfacing directly with a raw sensor, hence 2.2.1 and V4L2_CID_HBLANK/V4L2_CID_VBLANK are applicable.

[*]Does the VIDIOC_ENUM_FRAMEINTERVALS query work for others (ie: is this a hardware problem with two separate cameras? seems unlikely?)

See above.

[*]Is it reasonable for a library like FlashCap to make an assumption about supported frame intervals/rates if VIDIOC_ENUM_FRAMEINTERVALS does not return a valid value?

Yes.

[*]Is there some other gotcha with calling VIDIOC_ENUM_FRAMEINTERVALS that FlashCap is overlooking?

The bigger gotcha is going to be that you're looking at a raw sensor producing Bayer images, and configured using the Media Controller API. It's expected to be used through libcamera, not as a raw V4L2 device.
You may find that libcamerify (libcamera's V4L2 emulation layer) works for you app, but it just depends on exactly what the app needs to do.

Statistics: Posted by 6by9 — Sun Jan 21, 2024 8:14 am

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