I use Sony Vegas Pro and it


I use Sony Vegas Pro and it has a playback option called Velocity Envelope. This tool allows me go anywhere from -100% to +300% of the normal speed of the clip. It also lets me change speed instantly or over a desired period of time. For example, playing back at 25% speed and then, over a period of 1 second, ramp it up to 100%. This is easily accomplished with the Velocity Envelope tool.


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