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Participating Frequently
September 27, 2019
Question

Warp Stabilizer Jump/cut

  • September 27, 2019
  • 11 replies
  • 2678 views

Hey everyone,

 

I'm editing underwater footage of dolphins that was shot back in 2015. The footage was only shot at 24 fps to get a cinematic look (don't know if this is relevant for this topic). The footage is shot on a GoPro and pretty shaky. So I tried to apply the warp stabilizer effect to make it smoother. It works pretty good, but in every clip I try to stabilize there is a jump/cut. Does anyone have an idea why this is happening and how to get rid of it?

In the attached video at roughly 4 sec there is a jump/cut.

 

Thanks in advance

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    11 replies

    Participating Frequently
    September 30, 2019

    That's the thing, my sequence is 24 fps. I'll try the second solution and see if that works. Thanks

    Inspiring
    September 28, 2019

    ... you could also change your sequence to 24fps.

    Inspiring
    September 28, 2019

    One initial simple solution would be to select these clips in the bin > right click and select 'modify' > interpret footage > and change to assume frame rate 30 (or whatever exactly matches you sequence settings). Yes this will speed up the footage by around 18% but should get rid of the warp stabilizer jump cuts.

     

    Another possible way (don't know if this will work though never tried!!):

    Right click the clip in your sequence < select 'speed/duration'. Leave the speed setting at 100% but change 'time interpolation' to 'optical flow'. This will do a fairly good standards conversion on the 24fps clip and then give the warp stabilizer a less 'stuttery' scene to work with. This might work if the Premiere Pro rendering pipline processes any speed effects before other effects (like warp stabilizer).

    Inspiring
    September 27, 2019

    Your file plays at 30.0 fps but was shot at 24 fps, every 5th frame is a repeat of the frame proceeding it.

    For any chance of stabilizing this (still no guarantees), you'll have to fix the repeat frame issue.

    When I encounter this, I remove the frames manually -

    right-click on the original clip in your Project window

    select New Sequence from clip

    on V2 add a single frame Black clip above the first repeated frame

    advance 5 frames forward and repeat with another black clip on V2

    repeat for as many times as you can tolerate 😉

    now, copy the black frames you added and on V2, paste at the next freeze freeze frame (slide left-right as necessary to position correctly), repeat to end of sequence

    Now hightlight (select) all black clips on V2

    press option-down arrow (Mac) or equivalent on PC to move black clips to V1

    press option-up arrow to return black clips to V2 (this has removed the freeze frames on V1 and left holes)

    shift-Delete the highlighted black clips on V2 (this colapses the holes on V1)

    Export this sequence as a new movie file

    bring new movie file back into your project, right-click and choose Modify > Interpret Footage

    under Frame Rate select Assume this frame rate and type in 23.976, click OK

    work with is clip in your project

     

    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    so answers dont get 'burried'.

    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    If you look closely the glitch is exactly on a freeze frame.

    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    Scroll frame by frame then you will see it.

    Participating Frequently
    September 27, 2019
    Is that what causes the cut in the warp stabilizer?
    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    This trimmed clip is 30p with a lot of freeze frames.

    Participating Frequently
    September 27, 2019
    Oh yea, this one is 30fps. Freeze frames?
    Legend
    September 27, 2019

    Was the original media shot in 24p and then you edited in a 30p sequence? If so, that's going to duplicate the last frame every 5 frames to make the 24 -> 30 conversion possible. I imagine this could throw off warp stabilizer's analysis.

    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    OK

    Participating Frequently
    September 27, 2019
    Ann Bens
    Community Expert
    Community Expert
    September 27, 2019

    Can you post the original clip.

    Participating Frequently
    September 27, 2019

    Sure, I'll do that in a minute. Got to resize it to upload