[libcamera-devel] Video recording on PinePhone Re: libcamera on pinephone

[Joel Winarske]

I realize this is about the PinePhone, but the PinePhone Pro (RK3399) has a
dual ISP block:
http://opensource.rock-chips.com/wiki_Rockchip-isp1

Cameras:
* 13MP Sony IMX258 main camera with Gorilla Glass 4™  protective layer
* 8MP OmniVision OV8858 front-facing camera

The PinePhone Pro would produce much better results for the effort.  They
are currently in stock and shipping.

On Tue, Jul 5, 2022 at 2:16 PM Pavel Machek via libcamera-devel <
libcamera-devel at lists.libcamera.org> wrote:

> Hi!
>
> > > qcam looks like a step in right direction, but .. it needs two streams
> > > to be able to take photos, and we don't that capability on pinephone.
> > >
> > > For taking photos, I see two possibilities:
> > >
> > > a) Do the viewfinder in low resolution, then switch to high
> > > resolution, take a photo, and switch back. Unfortunately pipeline
> > > reconfiguration is rather slow (> 2 seconds?) on pinephone.
> >
> > 2 seconds is a lot, there may be a way to reduce that, it should be
> > investigated.
>
> I was optimistic. It is more like 7 seconds.
>
> > > b) Run the chip in high resolution all the time, downscaling for
> > > viewfinder. Should result in less shutter lag, but viewfinder will be
> > > limited to 15 fps and will need more cpu power.
> >
> > Could the GPU be used to scale the full resolution down ?
>
> Probably. But I find CPUs easier to use.
>
> > > Camera seems to be
> > > able to do JPEG natively, does it make sense to try to get that to
> work?
> >
> > That's an option, but if you want to have a viewfinder at the same time,
> > you would then need to decompress the frames. Furthermore, MJPEG for
> > videos isn't great, as the compression ratio will be low.
>
> PinePhone has rather weak CPUs. 4 of them, but not great. I don't
> think I can encode something better than MJPEG in 1280x720. So, JPEG
> should be good solution for PinePhone.
>
> (But likely dead-end as it will be unavailable on PinePhone Pro /
> Librem -- if I understand it correctly).
>
> > Any hope of getting the A64 video encoder to work ?
>
> A64 video encoder? https://forum.pine64.org/showthread.php?tid=9231 ?
> Hmm. Looks interesting but a lot of work.
>
> Best regards,
>
>                                                                 Pavel
> --
> People of Russia, stop Putin before his war on Ukraine escalates.
>
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