[libcamera-devel] How to use this library

[Jason H]

Many thanks for your reply. I'll get the details Monday, but the cliff notes are, it is a Pi4 2Gb,  stock Pi Desktop (most recent version), and rapsistill works fine. That's why I am confused.

I will report the rest in frail Monday. Have a great weekend!

> Sent: Friday, March 26, 2021 at 11:18 PM
> From: "David Plowman" <david.plowman at raspberrypi.com>
> To: "Jason H" <jhihn at gmx.com>
> Cc: "libcamera devel" <libcamera-devel at lists.libcamera.org>
> Subject: Re: [libcamera-devel] How to use this library
>
> Hi Jason
>
> Thanks for your question. Perhaps you can provide some details about
> your setup and what you've tried?
>
> 1. What kind of Raspberry Pi do you have? Are you using it with a
> local keyboard and display, or (for example) via ssh?
>
> 2. It might be helpful to report the responses you get from "uname -a"
> and "sudo vcdbg version", just to check what software versions you are
> running.
>
> 3. What kind of camera module do you have? If it's an imx219 or an
> imx477 then it has to be an official Raspberry Pi model; for other
> supported sensors there are no restrictions.
>
> 4. Did you follow all the build instructions libcamera-apps page
> successfully? Have you also added the correct dtoverlay to your
> /boot/config.txt for your sensor? Did qcam work when it suggested
> trying it?
>
> 5. If you comment out the dtoverlay line for your sensor and reboot,
> does "raspistill -t 0" display a camera image?
>
> Best regards
> David
>
> On Fri, 26 Mar 2021 at 20:55, Jason H <jhihn at gmx.com> wrote:
> >
> > So I can't find any good getting started guide on how to use this, and there isn't a
> > liubcamera-users email list that I can find. But my own attempts have resulted in frequent crashing.
> >
> > I am trying to use the libcamera-apps fom RaspberryPi:
> > https://github.com/raspberrypi/libcamera-apps
> >
> > However my efforts have been not successful in adapting their code.
> > I don't want any preview - I just want to get images (memory access ok, if it
> > is RGB888, BGR888, or I'll also accept file output as well) I don't want a preview,
> > window, and I only want/need one frame per second (a sequence of stills). The code
> > is already written against another library with a timer to acquire frames.
> >
> > My instant problem is on my pi (with a camera) it does not find any cameras: (cameras().size() == 0)
> >
> > camera_manager_ = std::make_unique<CameraManager>();
> > int ret = camera_manager_->start();
> > if (ret)
> >     throw std::runtime_error("camera manager failed to start, code " + std::to_string(-ret));
> >
> > if (camera_manager_->cameras().size() == 0)
> >     throw std::runtime_error("no cameras available");
> >
> > There is stuff in the v4l tree:
> > /dev/v4l/by-path/platform-bcm2835-codec-video-index0
> > /dev/v4l/by-path/platform-bcm2835-isp-video-index1
> > /dev/v4l/by-path/platform-bcm2835-isp-video-index3
> > /dev/v4l/by-path/platform-bcm2835-isp-video-index0
> > /dev/v4l/by-path/platform-bcm2835-isp-video-index2
> >
> > I don't know what to do next.
> > Help?
> >
> > _______________________________________________
> > libcamera-devel mailing list
> > libcamera-devel at lists.libcamera.org
> > https://lists.libcamera.org/listinfo/libcamera-devel
>