Smartphone as Webcam with Free Software?
Bernhard E. Reiter
bernhard at fsfe.org
Mon May 4 08:40:25 UTC 2020
Am Donnerstag 30 April 2020 22:53:41 schrieb Dmitry Alexandrov:
> Hold on, we are not finished yet. :-)
[Step: setup USB network connection GNU-System <-> *droid device.]
> > Am Mittwoch 29 April 2020 18:10:22 schrieb Dmitry Alexandrov:
> There is a dozen ways to configure networking in GNU. Until I know which
> you are using, I canʼt tell you anything but the obvious thing, that youʼll
> have to make sure that _default route_ is bound for wherever you are want
If this is going to be a general guide, I'll guess that it'll have to support
network manager and a root command line. What wever Ubuntu does, when you
plug-in an Android usb device.
> >> Why do you need encryption if you are going to use USB connection?
> > Good point, for USB this is not needed.
> Itʼs actually hardly needed for wireless LAN either.
In many situations, traffic on the WLAN is not secure from eavesdropping,
so at least I would feel better with an encrypted default.
(Example situations: WLAN at a drink chocolade shop; still using WPA2 with
a "weak" password; one of many devices in the local WLAN is rogue.)
[Step: making incoming video/audio stream a device for other apps]
> Have you googled it? Making RTSP stream into virtual video device is a
> rather common task. Keywords are ‘v4l2loopback’ and ‘GStreamer’.
Not yet https://metager.de/ ed it, as I was stuck earlier. Short search
did not reveal a howto that was usable right away. (But lots of details, which
I personally could potentially use, so thanks for the right keywords.)
> Sure, it would be very apt to make whatever youʼll achieve into a
> comprehensive guide. ;-)
I fear I personally won't have the time for this.
(This is why I did ask initially: I had hoped there were guides around
[Securing the phones listening network device.]
> In my experience, *droid (LineageOS if distro matters) does not flush
> ‘filter’ table, so it would be fine to just add them at startup.
A search seems to reveal that most *droid devices will not have an iptables
command ready to be used. (old infos from
> But dealing with so complicated and unfriendly system as *droid you never
> can be sure. I would ask this again at some *droid-related m/l.
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