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Step 1
You can use the Interpret Footage command to change the frame rate that Adobe Premiere Pro assumes for a clip. Go to "File" and then "Interpret Footage." Select a "Frame Rate" option and click on "OK." Changing the frame rate by increasing or decreasing it, adjusts the duration proportionally.
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Step 2
If you have a 10-second, 24-fps clip and change it to 48 fps, it will become half as long, and its new length will be 5 seconds.
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Step 3
You may also change the clip’s speed and duration by going to "Clip," and then "Speed/Duration." First click on the clip in the Project panel or in the Timeline panel.
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Step 4
In the window that opens, increase or decrease the speed by a percentage or by time. Click "OK."
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Step 5
Go to "Sequence," and then "Render Work Area." This will give you a preview of the clip if it is already in the Timeline. If you like the result, save your work. If not, go to "Edit," and then "Undo."







