[FFmpeg-user] Ffmpeg doesn't recognize /dev/video0 when run as root?

christina zou zou.christina at gmail.com
Wed Feb 22 19:17:45 EET 2017

Thanks for the tip.

To be honest, I'm hacking on a personal project for fun, security isn't
really a concern.

Raspberry Pi (which I'm using) recommends placing startup scripts in
rc.local in its official documentation:

However, if /dev/video0 can't be recognized as root, I'll follow your
advice and run my Ffmpeg command elsewhere.

On Wed, Feb 22, 2017 at 9:09 AM, Reindl Harald <h.reindl at thelounge.net>

> Am 22.02.2017 um 18:07 schrieb christina zou:
>> better question - why would anybody start anything dangerous like
>> multimedia encoders as root? maybe something like SELinux/appamor is
>> protecting your from yourself
>> You are probably right.
>> I want a Ffmpeg command to automatically start when I boot my Pi, without
>> any interfacing required (login/authentication). I've currently stuck the
>> command in /etc/rc.local, where everything runs as root. Do you know where
>> to better place it?
> surely, a proper service which drops to a restricted user
> with systemd a few lines, for sysvinit there are thousands of explaes how
> to start a service proper, and if you don't get something better just "man
> su"
> on proper systems rc.local died in 2011....
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