Overlaping video effect without deaming

[Yves Mazzon]

Hello all,

I like to have a special video effect where many frames for let say 2 or 5 seconds are overlapping each other. The camera will be focusing on a fix point and if for example a bird or any other fast moving objects is passing it will leave a trail of the same moving subject with a persistence of a certain define time. For example you will see the same bird in different position for a sequence of 3 to 5 seconds while the background is fix. I have seen a video of this effect but lost the link. I am using win 7 64bit and have installed Movie Studio platinum and AVS video editor. Many thanks.

Regards,

Yves

[Cornucopia]

Can be done pretty straightforwardly in AVISynth, thought it takes some coding.
Have done it before myself (see previous clip in 2014-2015, dancers).

Scott

[johnmeyer]

I have Vegas Pro. Here is one approach, and it probably will work in Vegas Studio.

1. Duplicate your track 2-3 times, depending on how many "trails" you want to create.

2. Move each of the lower tracks 1-5 frames to the right, depending on how far apart you want the trails to appear.

3. Set the compositing mode for each track to "add." This is the one setting that I'm not sure is available in Movie Studio.

4. Set the opacity for each track to some fraction of 100%. The simplest is to simply divide by the number of tracks. So, for instance, with four tracks you set the opacity for each to 25%, i.e., 1/4 of the total opacity. However, if you want make the more recent "trails" appear more strongly, and later appear more faintly, set the lower tracks to lower opacity and the upper tracks to higher opacity. The only requirement is that the opacity levels for all tracks add up to 100% (since you are using "add").

If you only want the effect to show on a certain area of the video, add a feathered mask to a copy of the original track, placed as the top track, above the tracks you just created. Make sure the compositing mode is set to the usual "Source Alpha," and NOT to "add." Set the mask so that the bottom tracks "show through" only over the thing you want to have trails.

Here is the result, with my daughter waving at you:

https://youtu.be/Ba-x01WXmR8