| 2-3 pull down (Film-Video Transfer) | |
| One
of several methods used to transfer film to video.
In North America this means film’s 24 frames per second to video’s 29.97 frames/second. If one considers that a video frame is made up of two interlaced fields and that having a video frame with fields from two different film frames generally isn’t too disturbing to the viewer then one can imagine how this might work. |
| Essentially it means frame 1 goes to 2 fields, frame 2 to 3 fields and frame 4 to 2 fields (etc.) This 2-3 ratio (24-60) works well except for the occaisional instance when a single video frame contains two fields which differ a great deal (such as at a cut, etc.). Adjusting for the slight difference in speed/image is done through time code (see drop frame) and through changing the speed of the audio track (see pull up and pull down). |  |