Video Capture Cards

CU-SeeMe sends and receives 4 bit gray images. You can think of 4 bit gray as an image with 16 shades of gray, with white being the "lightest shade", and black being the "darkest shade". Most video cards do not capture in 4 bit gray, and instead capture in color. CU-SeeMe converts the captured color images to 4 bit gray before sending them.

There are a variety of video formats (ways of digitally "encoding" a picture) used by various video capture cards. CU-SeeMe knows how to convert several of the color video formats to 4 bit gray. Here are the video capture cards CU-SeeMe has been tested with so far, along with the video format setting for each:

If your card is not listed here, see if it supports one of the following video formats:

If your capture card is not listed above, but does support one of the above video formats, it will likely work. If you do get a funky local video image, it is because sometimes a video format is implemented differently by different vendors. Which leads me to...

If your model of video capture card does not work with CU-SeeMe, and you would like it to, I'll add support for it, provided: 1) the card has Windows 95 or NT drivers; 2) you can get me that model of card by convincing the manufacturer to donate one to the cause.

Much thanks to the folks at ATI, Connectix, Winnov, and VideoLabs for their support.

Image Size

CU-SeeMe can capture and send local video in 2 sizes: 160x120 and 320x240. Set the image size in the video format dialog. Although most capture cards can capture at a variety of other sizes, CU-SeeMe can only use those two sizes. The 160x120 video size is recommended for most uses, unless you have a fairly fast connection with some "spare bandwidth", as the 320x240 video size sends 4 times the information of the 160x120 size.

A Note on Cameras

Currently, this version of CU-SeeMe only supports NTSC cameras. I know, the Win16 version did PAL, but PAL support, for both big and small video will be forthcoming.