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ghonish
Participant
December 13, 2017
Answered

Slow Motion in Premiere Pro causing problems when re-mapping

  • December 13, 2017
  • 1 reply
  • 4401 views

I started trying to incorporate slow motion into my edits using footage shot at a higher frame rate.

So I have a clip shot in 1080@120fps. My intentions were to use this clip along side others show 4k at 30fps. That was a mess so I figured I would make things easy and start a whole new project using only the one clip and dragging it into the sequence so that all the sequence setting match that clip exactly. The problem I have is when I try to select a moment in time during the clip that I would like to either speed up or slow down, the playback just jumps to a different point in the clip after I have adjusted the speed. Not giving me the result I wanted.

For example, if i wanted the clip to play in real time from point A-C and then begin playing slow motion from C-F, it just jumps to point M or somewhere else random in the alphabet.

I've tried dragging the clip into the sequence then adjusting the speed/duration method. I have tried using time remapping key frames. I have tried modifying>intemperate footage to be 30fps and then speeding up from there. Nothing I have tried so far has worked. I watch videos on youtube and no one else seems to have this problem.

If I could get some help with this I would be grateful.

      This topic has been closed for replies.
      Correct answer ghonish

      It was the rendering issue. Whenever I make fx adjustments it appears to jump around the timeline at those keyframes  (or cuts) in the clip. The fx obviously change my render bars to yellow or red, but when I render the clip in and out returning the bars to green, everything plays as it should.

      This also works with time remapping  feature so I can ramp the speeds up and down rather than having to make hard cuts to the clip. Although, this doesn't opt me with any choices for ripple effect or optical flow, but it still seems to work fine.

      Does that make sense?

      1 reply

      M
      Meg The Dog
      Inspiring
      December 13, 2017

      ghonish  wrote

      For example, if i wanted the clip to play in real time from point A-C and then begin playing slow motion from C-F

      Place the clip on the timeline.

      Find the point where you want the slow mo to start (point C) and use the blade tool to make a cut in the clip there. Now find where you want the slow mo to end (point F), and again use the blade tool to make a cut there.

      Now right click on the section of the clip you just cut (the part you want to slow mo) and choose Speed/Duration from the drop down menu.

      Set the slow motion speed to what you want, and make sure Ripple Edit is checked, and set the Time Interpolation to Optical Flow.

      Click OK.

      Unless you have a very high horsepower computer, you will most likely now have to render the timeline to see your work.

      MtD

      G
      ghonishAuthorCorrect answer
      Participant
      December 13, 2017

      It was the rendering issue. Whenever I make fx adjustments it appears to jump around the timeline at those keyframes  (or cuts) in the clip. The fx obviously change my render bars to yellow or red, but when I render the clip in and out returning the bars to green, everything plays as it should.

      This also works with time remapping  feature so I can ramp the speeds up and down rather than having to make hard cuts to the clip. Although, this doesn't opt me with any choices for ripple effect or optical flow, but it still seems to work fine.

      Does that make sense?

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