[mythtv-users] /dev/v4l/video0 errors after .19 upgrade

Nick Collier nick.collier at gmail.com
Thu Feb 16 15:18:10 UTC 2006


Thanks! That did the trick.

Nick

On 2/16/06, John Erickson <jerickso at gmail.com> wrote:
>
> On 2/16/06, Carl Fongheiser <carlfongheiser at gmail.com> wrote:
> > If you used the ebuild to install 0.19, your backend is now running as
> user
> > "mythtv", rather than root. Make sure that that user has permission to
> open
> > /dev/v4l/video0.  This would typically be done by adding that user to
> the
> > "video" group.
>
> While you're at it, make sure that the mythtv user has permission to
> do all of the other things it needs to.  Based on the fact that you're
> capturing on composite I'll guess that you're using a channel changing
> script.  So things to also check while you're at it:
> - Permission to write to your recordings directory
> - Permission to change channels, in my case the mythtv user needs to
> be in the tty group to write to the serial port
> - Permission to capture audio, make mythtv a member of the audio group
> (not needed for mpeg2 encoder cards)
> - Permission to capture video, make mythtv a member of the video group
>
> You can check to see what groups mythtv is in by running the following:
> groups mythtv
>
> You can add mythtv to the needed groups by running:
> usermod mythtv -G tty,audio,video,users
>
> (If you don't list a group that the user is currently in, that group
> is removed from the user)
>
> -John Erickson
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>
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