Adobe Premiere Pro CS4 | ![]() |
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Change speed and duration for one or more clipsThe speed of a clip is the playback rate compared to the rate at which it was recorded. Initially, a clip plays back at its normal, 100% speed. (Even if the frame rate of the source footage doesn’t match that of the sequence, the sequence automatically reconciles the difference. It plays back the clip at its proper speed.) In a Timeline panel, clips with speed changes are indicated with a percentage of the original speed. Changing clip speed omits or repeats the source frames during playback, thereby making the clip play faster or slower. A change in speed results in a corresponding change in duration, unless the clip is simultaneously trimmed. You can, for example, ungang speed from duration in the Clip Speed/Duration dialog box. Then, when you increase the speed, Adobe Premiere Pro uses more of the clip to fill the duration between the In point and the Out point. When you decrease the speed, Adobe Premiere Pro uses less of the clip to fill the duration. You can ungang speed and duration with more than one clip selected. Then, you can change the duration of the clips. For example, you can change the speeds only enough to make all the clips last the same duration. When you change the speed of a clip containing interlaced fields, you can adjust how Adobe Premiere Pro treats the fields. Consider making this adjustment especially when the speed drops below 100% of the original speed. (See Create interlaced or non-interlaced clips.) The duration of a clip is the length of time it takes to play from the In point to the Out point. You can set a duration for video or audio clips, letting them speed up or slow down to fill the duration. You can do the same for still-image clips, but without the changes in speed. You can change the speed and duration for one or more clips at a time. ![]()
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