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Thread: how to do the velocity/slow motion effect

  1. #1
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    Default how to do the velocity/slow motion effect

    hi, great forum btw.

    im new to Sony Vegas 6 but have read up a few tutorials. m making a movie and wish to slow down a part of a large clip i have.

    i figured i had to split the part which i wish to slow down from the clip, so i did and turn the velocity down on it seperately.

    i slowed down the clip to 38% which i liked. it seemed alright

    i save it all then i render and watch the movie file.

    the problem is it slows it down at that part but it doesnt cover the whole clip, only the time the clip covers in its original state - it doesnt seem to extend the clip which when i was doing i found odd as well.

    a clip slowed down would naturally extend in time but that doesnt seem to be happening, and i cant figure out how to do a proper slow motion effect where the clip will extend proportionately to the time being slowed down.

    oh and the AUDIO TRACK at that point of the clip also i wish to slow that down but i cant get velocity tool working on it, so that the time of the visual slow motion is complimented by the sound slowing down too jus to keep the audio and video running parallel.

    please can u help cheers, remember i am noob to it so like any toolbars i need to use, you gotta be like real specific, cheers in advance =)
    Last edited by wiz; 08-12-2006 at 07:13 PM.

  2. #2
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    Easiest way to achieve a constant slow mo is to rubber band the clip.

    Hold the left end (l mouse button) with normal edit tool selected, hold control and pull, the clip stretches / shrinks and the speed goes up / down.

  3. #3
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    sorry that doesnt seem to work. just loops the clip.

    and the velocity tool can not be programmaed that stupid its made so that is can turn down the velocity without the clip stretching in proportion.

    there must be some sort of rendering or function which fixes it

  4. #4
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    Odd, works for me every time. You sure you have normal edit tool selected?

    Hover over end of clip, hold lmb, hold control at the same time, pull; really does do the job. If it loops you may not be holding lmb and control.

    Works in a range 25% to 400% velocity.

  5. #5
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    Using the velocity in Vegas is an art form in itself, but once mastered achieves very good results. Play, play and play again is the best advice. You'll soon get the hang of it.

  6. #6
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    ^^fair enough

    mark w, i wasnt holding control will try later today.

    thanks, will be back if neitehr work though >:P

  7. #7
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    Default

    a thing i have used to control slow mo better with clips

    is to use windows movie maker to help

    for example i wanted to speed up a clip very fast reducing from about 40 secs to just about 6

    i first used movie maker to lengthen the clip - in slow mo

    thus making it longer then saved this as a single movie file - .wmv

    then used it in vegas

    i have done this the other way using the simple 2x effect in WMM first then using the wmv file into vegas

    bit of a run around and i think vegas does more than i know so far - but i found this helps make things more manageable


  8. #8

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    I just dont get the velocity envelope and always rubber band. I can't see how something that takes the same length as another event can last longer - what about compositing and audio :S

  9. #9
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    The only problem with rubber banding is that you are stuck at one speed for the duration of the clip. With an envelope, you can start fast, slow, reverse, speed up again and bring it back to normal speed all in one clip.

    Clever eh?

    For instance.... the shot in my comp entry of the car exiting the driveway started at normal speed and quickened as I wanted it to, to give the impression that she sped away quickly. What she actually did was pull out slowly, drive twenty yards and pull back in the next entrance.

    (yes, that was a shameless plug to watch THIS)

  10. #10
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    Here's a quick thing I've just done demonstrating what you can do with the Velocity Envelope tool

    HERE (2.5Mb WMV)

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