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This program is provided in the WinTV Application and uses Microsoft’s WDM for Windows capability which is built into Windows 98 and 2000. WinTV-Capture creates a file type called AVI (Audio/Video Interleaved) on your hard disk. This file contains digitized video and, optionally, audio. WinTV USB gives high quality captured video by storing uncompressed digitized video in an AVI file. This compares with compression methods such as JPEG and MPEG, where some loss of video quality is accepted in order to reduce the amount of data stored. Uncompressed video capture creates high quality digital video movies, but requires optimized system performance to avoid lost video frames (called “dropped frames”.) To create the best quality digital videos, use the following steps: • Compress/Edit, etc. by using the appropriate 3rd party software with these functions • Edit the raw video. Add special effects, cut, paste, etc. using one of the popular digital video editing programs such as Adobe Premiere, MGI VideoWave or U-Lead MediaStudio. • After editing the video, compress the video for the playback target. For example, if you are creating a video to be used in a multimedia presentation, compress with either Intel’s Indeo or Supermac’s Cinepak. If you are creating a CD-Video, use MPEG compression to get up to 74 minutes of video on a CD-ROM. 3-1 WinTV-USB Installation and Reference Manual Using WinTV Capture The WinTV-Capture program is an easy-to-use program that previews live video, captures an AVI file to disk, and plays back the AVI file to your VGA screen. WinTV-Capture can capture and playback video clips, but does not provide video editing capabilities. Digital video editing programs such as Adobe Premiere or U-Lead MediaStudio can be used to edit your digital videos. With WinTV-Capture you can set the number of frames per second that are captured and the size of the video image. You need to experiment to determine how much video your PC can store to the disk (in terms of image size and frames per second) because capturing video clips is very CPU and hard disk intensive. -Software Remote Capture window: Found in WinTV 2000 Setting the video image size The maximum suggested video image capture size is 320x240. When playing back the video on slower PC’s, a smaller image size might be needed. To set the image size, click on FMT Button: 3-2 WinTV-USB Installation and Reference Manual The WinTV-Capture program can use several different types of color formats when capturing video clips. For highest capture performance, choose the YUY2 OR RGB formats. These give excellent capture image quality and frame rate, but will give slow performance on playback of 320x240 image size videos. YUY2 OR RGB formats are also good if you plan to edit your video clips with Adobe Premiere or MediaStudio, and plan to compress the digital videos using Cinepak or Indeo. If you do not plan to edit your videos and want good playback performance, choose a smaller image size (160x120). Capture and playback performance is determined by your system configuration, including CPU and hard disk speed. Setting the number of frames per second captured To set the number of frames per second captured, click on File/CaptureSetup: The number of video buffers will depend upon how much RAM you have in your system. The maximum number of buffers is 1000. After setting the video format, the number of frames per second and possibly creating a new file name (by clicking on File/SetCaptureFile), you can start capturing video by clicking on the Capture Video icon. Using Audio with -Capture To capture audio along with video, the WinTV USB must be connected to a sound board capable of saving sound clips. To connect the USB to a sound board do the following: 3-3 WinTV-USB Installation and Reference Manual a) Make sure the audio output of the card is plugged into the LineInput of the sound board. b) Make sure the LineInput volume for recording is set correctly and not muted. Open the Volume control panel, then click on Options/Properties. In the panel Adjust volume for recording set for Recording. Make sure LineInput is checked under Show the following volume controls and that the volume for LineInput is not muted and is set at an appropriate level. Capturing audio along with video puts a greater strain on your PC than capturing video alone. If your PC drops many frames while capturing audio and video together, then capture the audio separately with the audio capture utility from Windows. The audio can be merged with video later on during the video edit stage. Suggestions on capturing video Captured image sizes can be either 160x120 or 320x240 pixels. For the best trade off between image size and captured frames per second, use a 320 x 240 image. With a 166MHz processor MMX (or better) and a reasonably fast hard disk drive, you should be able to capture 30 frames per second using the YUY2 OR RGB format. 3-4 WinTV-USB Installation and Reference Manual The consumption of ha...

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