There are, in fact, quite a few around with BNC connectors, but since there are adapters for all sorts of connectors apparently, it doesn't make any difference, I suppose. -- Georgios Kapetanakis Department of Computer Science University of York ----- Original Message ----- From: "Jim Dodgen" <Jim.Dodgen@xxxxxxxxxxxx> To: <video4linux-list@xxxxxxxxxx> Sent: Monday, October 21, 2002 8:35 PM Subject: Re: Frame grabbers with bt8x8 chipset > I have not seen a video capture card with BNC connectors. > > I am monitoring CCTV security cameras. > > I use adapters, I wire up a 75 ohm coax with F-connectors at each end and > then use a "f to bnc" at the camera ends, and a "f to rca" at the osprey > (computer) end. > > > At 05:57 PM 10/21/2002, you wrote: > >I did, Jim, but it does not have a BNC connector, only composite and > >s-video... > > > >-- Georgios > > > >----- Original Message ----- > >From: "Jim Dodgen" <Jim.Dodgen@xxxxxxxxxxxx> > >To: <video4linux-list@xxxxxxxxxx> > >Sent: Monday, October 21, 2002 4:38 PM > >Subject: Re: Frame grabbers with bt8x8 chipset > > > > > > > look at the Osprey 100 it is a pure frame grabber > > > > > > At 10:52 AM 10/21/2002, you wrote: > > > >Georgios Kapetanakis wrote: > > > > > > > > > > Hi all, > > > > > > > > > > I know this is getting slightly away from the core interest of the > > > > list, but > > > > > I need your help once more. I am convinced now that getting a frame > >grabber > > > > > with a bt8x8 chipset is the best way to go, as far as driver support > >is > > > > > concerned (bttv). > > > > > > > > > > I know of only two frame grabbers with this chipset: > > > > > - Imagenation PXC200AL > > > > > - Sensoray 611 > > > > > > > > > > Are there any more? Please note that I am interested in frame grabbers > >for > > > > > computer vision, not TV/Tuner cards.... > > > > > > > >But what's the difference between a computer vision grabber and a TV > > > >card with the channel set to the raw video input? > > > >Following for example is the output of a test program I wrote using the > > > >functions in linux/videodev.h to query the bttv driver. You can set the > > > >channel to 1 to receive video. I'm pretty sure that the video quality is > > > >mostly limited by the video format itself, and that any grabber will > > > >produce similar output for a given NTSC or PAL signal. The only other > > > >issue is progressive scan, where you grab only a part of an image, but > > > >there you might be better off getting a dedicated camera with image > > > >processing built into it. > > > > > > > > > > > >Hello world. Today we are going to look at the video grabber at > > > >/dev/video > > > >name of /dev/video: BT878(Hauppauge (bt878)) > > > >VID_TYPE_CAPTURE Can capture to memory > > > >VID_TYPE_TUNER Has a tuner of some form > > > >VID_TYPE_OVERLAY Can overlay its image onto the frame buffer > > > >VID_TYPE_CLIPPING Overlay clipping is supported > > > >VID_TYPE_FRAMERAM Overlay overwrites frame buffer memory > > > >VID_TYPE_SCALES The hardware supports image scaling > > > >Type 0xEB > > > >4 channels > > > >1 audio device > > > >Max width: 768 Max height: 480 > > > >Min width: 48 Min height: 32 > > > >Video frame buffer base 0xe8000000 > > > >height 768 width 1024 > > > >depth 16 > > > >bytes per line 2048 > > > > > > > >* * * Channel 0: Television > > > >has 1 tuner > > > >Flags: 0x3: has tuner; has audio > > > >Type: 0x1: TV; not camera > > > >Norm: 0x1: NTSC > > > >brightness 0x7FFF > > > >hue 0x7FFF > > > >colour 0x7D70 > > > >contrast 0x6B84 > > > >whiteness 0x0 > > > >depth 0x10 > > > >VIDEO_PALETTE_RGB565 565 16 bit RGB > > > >* * * Channel 1: Composite1 > > > >has 0 tuners > > > >Flags: 0x2: no tuner; has audio > > > >Type: 0x2: not TV; camera > > > >Norm: 0x1: NTSC > > > >brightness 0x7FFF > > > >hue 0x7FFF > > > >colour 0x7D70 > > > >contrast 0x6B84 > > > >whiteness 0x0 > > > >depth 0x10 > > > >VIDEO_PALETTE_RGB565 565 16 bit RGB > > > >* * * Channel 2: S-Video > > > >has 0 tuners > > > >Flags: 0x2: no tuner; has audio > > > >Type: 0x2: not TV; camera > > > >Norm: 0x1: NTSC > > > >brightness 0x7FFF > > > >hue 0x7FFF > > > >colour 0x7D70 > > > >contrast 0x6B84 > > > >whiteness 0x0 > > > >depth 0x10 > > > >VIDEO_PALETTE_RGB565 565 16 bit RGB > > > >* * * Channel 3: Composite3 > > > >has 0 tuners > > > >Flags: 0x2: no tuner; has audio > > > >Type: 0x2: not TV; camera > > > >Norm: 0x1: NTSC > > > >brightness 0x7FFF > > > >hue 0x7FFF > > > >colour 0x7D70 > > > >contrast 0x6B84 > > > >whiteness 0x0 > > > >depth 0x10 > > > >VIDEO_PALETTE_RGB565 565 16 bit RGB > > > > > > > > > > > > > > > >/\/\/\/*=Martin > > > > > > > > > > > > > > > >_______________________________________________ > > > >Video4linux-list mailing list > > > >Video4linux-list@xxxxxxxxxx > > > >https://listman.redhat.com/mailman/listinfo/video4linux-list > > > > > > > > > > > > _______________________________________________ > > > Video4linux-list mailing list > > > Video4linux-list@xxxxxxxxxx > > > https://listman.redhat.com/mailman/listinfo/video4linux-list > > > > > > > >_______________________________________________ > >Video4linux-list mailing list > >Video4linux-list@xxxxxxxxxx > >https://listman.redhat.com/mailman/listinfo/video4linux-list > > > > _______________________________________________ > Video4linux-list mailing list > Video4linux-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/video4linux-list
