Date: Tue, 25 Jun 2002 09:51:32 +0200 (CEST) From: Harti Brandt <brandt@fokus.gmd.de> To: Antony T Curtis <antony.t.curtis@ntlworld.com> Cc: freebsd-arch@freebsd.org Subject: Re: video capture Message-ID: <20020625094833.U395-100000@beagle.fokus.gmd.de> In-Reply-To: <3D17925C.5060106@ntlworld.com>
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On Mon, 24 Jun 2002, Antony T Curtis wrote: ATC>Harti Brandt wrote: ATC>> On Mon, 24 Jun 2002, Antony T Curtis wrote: ATC>> ATC>> ATC>Is there an analogous specification for FreeBSD as Linux's V4L? ATC>> ATC> ATC>> ATC>Is there interest (except of myself) for such a beast? ATC>> ATC>> There is no such thing. It would be nice to have one (but not so broken by ATC>> design as V4L). ATC> ATC>I'm open to suggestions.... In a past life, I messed about with MMOS/2 ATC>(OS/2's multimedia subsystem) but that doesn't qualify me for such a task. ATC> ATC> ATC>As to how such a thing be implemented - does it sound reasonable to ATC>create a CAM-like abstraction of which all the video devices may be ATC>connected to? ATC> ATC>It would be great to have something in place which is not so device ATC>specific. Yes, I strongly suggest a layer above the video drivers. Well, I could assist you in the design of such a thing, having written a couple of applications that use video under FreeBSD and Solaris. But this would be not earlier than august, because I'm leaving for vacation in the next days. ATC>> ATC>I'm messing about writing a KLD for a OV511 based USB capture device and ATC>> ATC>it would be nice if there was some generic interface for all such ATC>> ATC>devices. All I can see in STABLE is the bktr device for capturing. ATC>> ATC>> The bktr more or less works. There are a number of issues, where the chip ATC>> documentation seems to be wrong, but you can easily get 25 fps without ATC>> much cpu usage. ATC> ATC>I have two old video capture boards which are not in use... One is a ATC>"Black Widow" branded ISA board (which I have some DOS source code to ATC>drive it) and the other is a PCI board with a "Zoran" chip on it. I would also be interested in getting USB cameras and Firewire under this api. harti -- harti brandt, http://www.fokus.gmd.de/research/cc/cats/employees/hartmut.brandt/private brandt@fokus.fhg.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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