Zoneminder and multichannel cards

Julian Elischer julian at
Thu Oct 4 09:46:08 PDT 2007

Achilleas Mantzios wrote:
> I have successfully (and painfully!) managed to get correct quality video out 
> of ZoneMinder zoneminder-1.22.3, on 6.2-RELEASE-p4 with the LMLBT4M card.
> (card info on
> However i cant instantiate a second instance of the video capture daemon of 
> zoneminder (zmc), because of a "/dev/bktr0: Device busy" error.
> Is it possible to open /dev/bktr0 from two programms at the same time?

I thought that that card only had one video channel, and that it switched the
video inputs .

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