When you select a preferred video capture device, you are either:

• Selecting the video card that you want to use with your camera. Some cameras require a video card to function. (A video card is a hardware component that allows your computer to produce video images.) If your camera requires a video card, you plug the camera into the video card when you plug it into your computer.

  If you have more than one video card on your computer, use the video preferences to select the video card you want to use, and then ensure that your camera is plugged into that video card. If you are unsure which video card to choose, experiment with the available options.

  OR

• Selecting a driver for your camera. If your camera does not require a video card, you can plug it directly into your computer's Universal Serial Bus (USB) port. If you have installed the software for more than one camera on your computer, use the video preferences to select the driver for the camera you want to you use, and then plug that camera into the USB port on your computer.

  Note If you change your video capture device, you MUST click OK in the dialog box, leave the meeting, and attend the meeting again for the change to take effect.

Some camera and capture card manufacturers support more than one input source or camera type. You might need to select a different video source before you can view video images.

To set your video source:

1. Click Set Video Source. The video source dialog box appears. (This dialog box differs depending on your camera manufacturer.)
2. Experiment with the available controls. Depending on your camera type, you might need to adjust settings such as brightness and contrast, or you might need to select a video source. If you cannot see your video image even after adjusting these settings, try setting your video format and size.

Most cameras support more than one video size and format. You might need to experiment with the sizes and formats that Sametime supports before you can view video images.

To set the video format and size:

1. Click "Set Video Format and Size." The format and size dialog box appears. (This dialog box differs depending on your camera manufacturer.)
2. Select one of the video sizes listed below. Select the larger size if possible.
   • 176 x 144
   • 160 x 120

     Note If you are using the TotalView High Res 360-degree video camera, choose the 768 x 192 video size.

3. Experiment with the various video formats. Sametime supports all of the video formats listed in the table below. (This table is also listed on the Video Preferences tab.) The formats at the beginning of the list require less preprocessing, and therefore deliver better quality than the formats at the end of the list.

   Sametime Video Formats
   I420
   IYUV
   YV12
   YVU9
   UYVY
   UYNV
   YUY2
   YUNV
   YVYU
   CYUV
   RGB16
   RGB24
   RGB32
   RGBT

   Note If you are using the TotalView High Res 360-degree video camera, choose the RGB24 video format.