CS3703 - Guidelines for Video Capture - Using Adobe Premiere

Setting up the Capture File

When Adobe Premiere captures video, it temporarily stores the video data in a capture file on your hard disk until you save the video as an .avi file (Audio Video Interleaved). If your hard disk is fragmented, Adobe Premiere may need to seek additional disk space during the capture, which may result in dropped frames.

You can preallocate space on your hard disk for the capture file so that Adobe Premiere does not need to look for additional space as it is capturing data. A preallocated capture file is created in contiguous blocks on the hard disk. Premiere simply reuses the same space for each capture session, so you do not need to rebuild to capture file. You must, however, save the captured data to an .avi file when you finish capturing video; otherwise, your data will be overwritten during the next capture session.

To use a preallocated capture file:

  1. Choose Capture File from the Movie Capture menu. The Capture File Options dialog appears.
  2. Select the Use Preallocated File option. The Create Capture File dialog appears.
  3. Enter the size of the capture file in megabytes. The dialog box shows the currently available amount of space on the scratch disk. The capture file size can be up to 2 MB less than the available disk space. The capture file is called capfile.avi and is created in the root directory of the hard disk selected in the Scratch Disks Preference.
  4. Click OK.

Selecting Preview Options.
Preview options let you specify how you preview movies before you capture them. If your video capture board supports overlay previewing, you can preview a live video signal on your computer monitor. In overlay mode, the source video passes directly to the Capture window rather than being processed by the board. Overlay previewing requires much less processing than does standard previewing.

You can specify the frame rate for previews that you play either before or during capture. Decreasing the frame rate reduces the processing time; increasing the frame rate gives a more accurate preview.

To use overlay previewing:
Choose Overlay from the Movie Capture menu. The check mark next to Overlay indicates that this feature is turned on.

To set the preview rate:
1. Choose Preview Rate from the Movie Capture menu.
2. Select the frame rate when previewing and the frame rate when capturing from the drop-down lists.
3. Click OK.

To capture without controllable devices

  1. Choose Capture -> Movie Capture from the File menu. The Movie Capture window appears, and the Movie Capture menu appears in the menu bar.
  2. Select recording options using the Recording Options command in the Movie Capture menu.
  3. Use the Video Source command in the Movie Capture menu to select a video source and set video source options as appropriate.
  4. Press the Play button on the tape deck to start the tape, if that is the source. If you are recording images, the tape begins to preview in the sample area of the Movie Capture window.
  5. Click the Record button to start the recording. You should start the recording 1/2 second to 1 second before the first frame you want in your clip, to ensure that the video capture board is digitizing at full speed. To stop recording, click the mouse button or press the Esc key.
  6. Use the Save command to save the clip.

CS Home Page -- CS3703 Main Page -- Prof. Fritz's Home Page
Jane Fritz, jane@unb.ca

Last modified February 1997