11th students can appear for NTSE

Working with aspect ratios and field options

In most video, each frame consists of two Fields. One field contains the odd lines of the frame, the other the even lines. It is a matter of Interlace-Fields, d. H. combined images that together form a complete picture. Adobe Photoshop Elements includes a reverse field order preset for video imported from a hard drive or flash-memory camcorder that uses top fields first. You can shoot original footage with top fields first. For this footage, make sure your project uses either the standard or widescreen preset from the Flash Memory Camcorder Presets folder.

The line jump is usually not visible to the viewer. However, each field records the subject at a different point in time. Because of the time difference, the fields can be recognized when a clip is played back in slow motion or a frame is frozen. The same behavior occurs when a frame is exported as a still image. To avoid this situation, you can Merge fields together. By combining fields (deinterlacing), a field is deleted and the remaining field is either duplicated or its lines are interpolated.

By reversing the Field dominance, d. H. The order in which the fields are recorded and displayed can also cause playback problems. Reversing the field dominance can result in the movements appearing choppy as the fields are no longer displayed in chronological order. Fields are reversed when the field dominance of the original video tape is the opposite of the field dominance of the video capture card used for clip recording. Fields are also reversed when the field dominances of the original video tape and the video editing software are opposite. Reversal can also occur when playing back an interlace clip in reverse.

To avoid this, you can Merge fields together. By merging fields (deinterlacing), one field is deleted and the remaining field is either duplicated or its lines are interpolated. You can set the field options for an interlace clip so that the image and motion quality of the clip are preserved in certain situations. These include changing the clip speed, exporting a filmstrip, reversing a clip, or freezing a video frame.