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#apertus IRC Channel Logs

2022/11/09

Timezone: UTC


15:21
aombk2
joined the channel
15:23
aombk
left the channel
18:37
paulk
hi folks! just rediscovered apertus after a few years off my radar, glad to see the project is still alive!
18:38
paulk
I recently got interested in building my own a/v gear with only free software embedded stuff
18:38
paulk
and at the end of the line is making a camera
18:39
paulk
what I have in sight is to use SoCs like Allwinner or Rockchip with mainline Linux support and capture + isp capabilities
18:39
paulk
instead of a fpga+cpu approach
18:40
paulk
(i.e. isp is in the SoC silicon)
18:41
paulk
especially on the Allwinner side I've been working on v4l2 drivers for MIPI CSI-2, capture and ISP support
18:41
paulk
https://patchwork.kernel.org/project/linux-media/list/?series=691734 for the isp series
18:43
paulk
similar (even more advanced) is already available for rockchip
18:43
paulk
so that means MIPI CSI-2 sensors which are typically not the most advanced
18:44
paulk
best I could find that's easily sourceable and not crazy expensive is the raspberry pi hq camera
18:44
paulk
which is imx477
18:45
paulk
though some newer generations of Allwinner seem to support LVDS and sub-LVDS
18:45
paulk
with up to 16 chans IIRC
18:45
paulk
anyway another area of interest is h.264 encoding
18:46
paulk
(also would be interesting to see if I/O holds for storing raw frames)
18:47
paulk
I wrote some PoC for the Hantro encoder (in Rockchip SoCs) https://github.com/bootlin/v4l2-hantro-h264-encoder
18:47
paulk
And there are bits and pieces around for Allwinner too
18:48
paulk
so anyway, it's not as high-end as the AXIOM and taking a different approach but just wanted to let you know
18:49
paulk
oh and also I would be interested in writing a mainline v4l2 driver for driving Canon EF lenses through SPI
18:49
paulk
in case that can be of interest to anyone around here
19:11
davidak[m]
FYI: https://nofilmschool.com/details-emerge-atomos-8k-image-sensor i don't think we need 8K (yet), it's still interesting
21:02
Bertl
paulk: sounds interesting ... keep us updated!
22:05
vup
paulk: what is the maximum size and framerate hthe h.264 encoder can do? And is it a hard ip block or some more generic vpu dsp like thing like on the pi's?