From: Tomasz Borowczyk <tomboro88@gmail.com>
To: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: linux-media@vger.kernel.org
Subject: Re: cx231xx with 3 grabbers
Date: Sun, 19 May 2019 11:43:58 +0200 [thread overview]
Message-ID: <CAM+RvBR5LxB=Kauc=4=y_gaP6jfQbWETaJJp_X=ZEav5jzAZvw@mail.gmail.com> (raw)
In-Reply-To: <20190518080408.40b3822f@coco.lan>
sob., 18 maj 2019 o 13:04 Mauro Carvalho Chehab
<mchehab+samsung@kernel.org> napisał(a):
>
> Tomasz,
>
> Please don't top-post. Makes very confusing to for people to follow
> the discussions on mailing lists.
I'm sorry.
> Most laptops use a single USB bus shared on all their ports. This is
> easy to verify: the lsusb command shows on what bus a device is connected.
> If you can place the 3 cameras on different buses, it may work there
> (or if you have an USB 3.0 hub and connect the hub to an USB 3.0 port,
> and the cameras on it, it might work as well).
Hmm. I have both USB 3.0 and USB 2.0 on my laptop, and I connected the
3 grabbers to USB 3.0 HUB,
but the HUB was then connected to USB2.0 port :(. My mistake.
So I need to check what will happen when I connect the HUB to USB3.0 port.
But I will be at home in a week. If it works, then maybe it will be
possible to use 3 grabbers with a single Orange Pi 3 (it has USB3.0),
or NVIDIA Jetson Nano (the same price as 3x Raspberry Pi 3).
>Without taking into account the limited speed and features of the CPU
>found on RPi3, probably the only solution for using 3 cameras on a single
>RPi3 would be:
>
> - 1 RPi Camera module using the special camera connector;
> - 1 USB camera to a RPi USB port;
> - 1 USB hat;
> - 1 USB camera connected to the USB hat.
I want to use 3 grabbers, because I have already installed 3 analog
cameras at home, which are connected to a small CRT Display.
I want to have remote access to them, and it looks like a fun project for a SBC.
Thanks,
Tomasz
prev parent reply other threads:[~2019-05-19 18:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-13 22:18 cx231xx with 3 grabbers Tomasz Borowczyk
2019-05-14 12:05 ` Mauro Carvalho Chehab
2019-05-18 10:20 ` Tomasz Borowczyk
[not found] ` <CAM+RvBRhG_Am=eGKog8a-rDAULrkNjKpbH+C+bqOk=wx5gXLJQ@mail.gmail.com>
2019-05-18 11:04 ` Mauro Carvalho Chehab
2019-05-19 9:43 ` Tomasz Borowczyk [this message]
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