Slow Motion Clip Speed AND Removing Non-still Background

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Hi. So I want to make a part of a clip slow motion. I tried both the "clip speed" effect in visual effects and the one in audio effects, but whenever I set the speed to 0.25x or 0.75x, the speed will reset to 1.00x. Is there any way to do slow motion?

If you can fix the problem above, can you tell me how to remove a background that's not still but moving (i.e. the background in a 3D pc video game)? I want to get the animation of the Chinese "victory royale" in Fortnite.
SYSTEM INFORMATION
macOS 10.14, MacBook Air, 1.4 GHz Intel Core i5, memory 8 GB 1600 MHz DDR3, Intel HD Graphics 5000 1536 MB
Camtasia: Mac Version 2018.0.3(105058)
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aaronliu0130

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Posted 3 months ago

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Jay Versluis

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In Camtasia 3 and 2018, after you add the Clip Speed effect, the section will naturally be longer. Make sure no other clips are directly behind your slow motion clip otherwise there's no room. Alternatively your slow motion clip needs to be on a separate vide track for this to work and show the elongated speed accordingly. You can conveniently drag the end of the clip to wherever you would like it to extend (with the effect showing, drag the little clock icon), or you can give a numeric in the Properties tab. 

You second question sounds like you'd like to use a keying effect. I don't think Camtasia has that option. You could use something like Premiere or After Effects to remove the background, then render the sequence out with transparency (using the PNG codec) and use the result in Camtasia as an overlay on a second video track. I'm doing this with animated titles and it works a treat.
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aaronliu0130

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First of all, now I can do the slow motion thing, but there's a cut in it. See the recording below.

um how do I upload a video? So after the cut, everything is at normal speed.

Second of all, can you tell me how do you use keying? I don't understand what you're saying (btw, I don't have the background image.)
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Jay Versluis

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There's no video attached, so I can't comment on that. Clip Speed only works on a per-clip basis, so if you have two clips, drag the second one behind your first one and apply Clip Speed again. That will play your footage seamlessly. That's how editing generally works: drag one clip after the other onto the timeline to create your finished work.

Keying is the process of removing usually a single colour from an image/video and replacing it with something else. In movies, they shoot people against a green screen. This colour can then be picked up by the editing software and removed (blue or green is often used because it's not present in skin tones). See more here: https://en.wikipedia.org/wiki/Compositing

Uploading is the process of sending the rendered file to a video hosting service like YouTube or Vimeo. You open an account, click upload and select your file. A short while later you'll get a link to your video so you can share it with others, without having to send them the actual video file (that saves bandwidth on your part).
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Rick Stone

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"Keying" is the general term used in the film making industry.

In Camtasia you accomplish it by opening the Visual Effects panel (1). Note that you may not see it and will need to click the More button (2). Then you apply the Remove a color effect to the clip. (3).



Once you have done this, you then use the eyedropper in the properties panel to sample the color to be removed.



Note that depending on the situation, you may end up having to futz with the values in the panel to make it work more cleanly.

Cheers... Rick :)