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Activity Forums RE:Vision Effects Twixtor workflow question – makes me want to run a mile

  • Twixtor workflow question – makes me want to run a mile

    Posted by Marc Nibor on February 26, 2016 at 12:15 pm

    sorry for the non descriptive title of this post. I couldn’t think of a better short description.

    There is one thing I never figured out properly and every time I run into this problem I feel like I never want to use the plugin again because the workflow was so unpleasant ; )
    I really hope I am just missing a huge obvious point here and should have paid better attention when I studied all the tutorials way back then.

    Example:
    I got a 10 Minute sourceclip and somewhere around 7 minutes in I got a 15 Frames long area that I need to slow down as much as possible for using it later in another clip.
    To figure out how low in the percentage I can go I usually just do a quick visual test.

    The problem is that each time I change the speed% in Twixtor, my work area gets thrown off and since there is no real time reference I manually need to scrub through the footage to find the correct area again…. and I need to do that over and over again each time I change the speed setting.
    I tried to edit the in/out points of the source clip before inserting it in a comp… but that doesn’t fix the problem.

    In the past the only “solution” was to trim and RENDER all the needed areas and then work with those “custom made clips for twixtor” as source files.

    I always thought it shouldn’t be too hard to solve this problem from within the plugin. For example by letting the user specify a startframe for the effect at normal speed and then calculate the new position according to the change of speed.

    Like I said, I really hope I am missing something very obvious here… please open my eyes ; )

    Marc Nibor replied 8 years, 9 months ago 2 Members · 2 Replies
  • 2 Replies
  • Peter Litwinowicz

    February 26, 2016 at 4:39 pm

    Instead of doing it the way you are doing, on the first frame of the sequence set a Speed % keyframe of 100. Then on the frame before the section you want to slow down, set another keyframe of 100%. Then on the first frame of the section you want to slow down, set a speed % of what you want to slow down to.

    (make sure your two 100% keyframes are set to have linear interpolation, so you don’t get anything but 100% speed in the area before you slowdown).

    Then after you find the slowdown you like, say it’s 10%. Go to the last frame of the slowdown section that you want and set a keyframe of 10%. Then on the frame after that, set another keyframe for 100% to back to “regular” speed.
    Pete

  • Marc Nibor

    February 26, 2016 at 5:13 pm

    THANK YOU Peter!
    Like I expected the solution is absolutely obvious. If I would have turned my brain on it might have occurred to me that the “problem” I described is expected behavior ; )

    I haven’t had the chance to try it yet. But I’m sure it works since your description makes perfect sense! : )

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