

That’s because some computers struggle to process so much information instantly. If your original file is large, the preview may be lagging a bit. Preview your movie before exporting to make sure it looks the way you wanted. Split it the same way as you would split a video and adjust its position on the timeline to synchronize with the right footage fragment. To create a music overlay for your fast-motion scene, use the green “Add object” button in the top menu and choose any audio file from your PC.

So, you may want to mute the original audio track (use the same Properties window, scroll down to Audio track and choose “Don’t use audio”). Note that when you speed up a video, its sound will automatically follow the tempo. Therefore, 1000% will give you a 10X increase. Technically, if you put 200 instead of the original 100 (%), your clip will be played twice as fast as the original footage. To see how your actions change the playback speed, use the red Preview button. Scroll down to the Speed (%) parameter and increase it until you’re happy with the result.It’s a sticky tab on the right side of the program, but if you don’t see it, use a right mouse button to click on the video and choose Properties from the menu. Now, click on the video (or its separated fragment) you want to speed up and proceed to the Properties window.Repeat to split out the end of the fragment. Just place the timeline cursor where the fast-motion part should begin and split there. Splitting the video is performed through the Split icon looking like a razor – you’ll find it in the top menu, “Cutting and splitting” section.For the latter, you’ll need to split the video first. When the footage is on the timeline, you need to decide whether you want to speed up the video entirely or apply the fast-motion effect to a particular part.

