CHAPTER 3: EDITING 69Setting field options for video clipsVideo Editor allows you to work with both field-based and frame-based video files.Field-based video stores video data as two distinct fields of information for eachframe. This allows the video to play back flicker free on a television whichinterlaces both of these fields in odd/even scan lines. If your video is only forcomputer playback, you should save your work as frame-based.To specify the type of video you are working with:1. Select the clip.2. Select Clip: Media Source Options. (Right-click the clip and from the pop-upmenu, select Media Source Options.) This will open the Media SourceOptions dialog box.• Freeze before frame. When the clip is played back, it will "freeze" on thedesignated frame from the beginning of the clip, up to and including theframe itself, and then resume normal playback.• Freeze after frame. When the clip is played back, it will playback normallyuntil it comes to the designated frame and then "freeze" to the end of theclip.If both boxes are checked, the clip will freeze both before a particular frameand after a particular frame. See the illustration below for an example.In the above illustration, the top row represents a normal clip of fifteenframes. In the second row, Freeze before frame was selected and frame 5was frozen. Frame 5 is then repeated (frozen) until frame 6 is reached.Normal playback resumes. Freeze after frame was also selected with thevalue of 10, and the frame is repeated (frozen) until the end of the clip. Sothis clip freezes at two different points. If you want to freeze more frameswithin this one clip, you must first use the Scissors Tool to cut your clip intoseparate clips.Freeze before frame Freeze after frame
