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Date: Thu, 4 Oct 2007 10:37:01 -0500 (CDT)
From: Mark Tinguely <tinguely@casselton.net>
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To: achill@matrix.gatewaynet.com, freebsd-multimedia@freebsd.org
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Cc: 
Subject: Re: Zoneminder and multichannel cards
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>  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 http://www.linuxmedialabs.com/product_details.php?prodid=320).
>
>  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?

No, the bktr(4) driver is written so that only one open is active at a time.

--Mark Tinguely.