Graphics Reference
In-Depth Information
Figure 11-9
A mismatched video and audio strip added with the wrong frame rate
If you are dealing with a file that you did not create yourself, you may not know what frame rate it was en-
coded at. You can often find this information by right-clicking the file in the Finder or Explorer, and clicking
InfoorProperties.Youmayneedtoimportitmorethanoncetofindoutwhichframerategivesaccurateresults.
You should first try the common frame rates listed previously.
Drop Frames
The 29.97 drop-frame frame rate is a historical relic of analog television encoding. The original motivation for
dropping the frame was to make up for the extra time taken by color transmission while maintaining the 30 fps
frame rate of previously used black-and-white televisions. In spite of what the term might seem to imply, no actu-
al video frames are dropped; the dropped frame refers only to the way the frames are counted. Frame dropping
has no effect on the quality or content of the video.
Working with Sequence Strips
After you have added a video, you can drag it, extend it, or edit it in a variety of ways.
Basic Sequence Strip Operations
When you add a video or audio strip (or both at once), the strip appears on an empty horizontal channel.
