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Mask Path 'sticking' on certain keyframes

Explorer ,
Apr 14, 2017

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I have a mask on an adjustment layer. Keyframing is on. The problem is that the mask seems to get stuck in places and then jumps to next the keyframe. It will only do it between certain keyframes, not all of them. So, if I create a keyframe at positions A, B, C, D and E, say 6 frames apart, the mask will move between keyframes A-B, B-C, D-E, but it won't move between C-D. (I hope this makes sense.) I cannot figure out why it's locking on certain keyframes.

Here you can see the playhead is between keyframes, the mask is moving.

between keyframes working.png

Now here, this is one frame before the keyframe and it's stuck on the previous keyframe.1 frame before.png

next frame and it jumps to the keyframe

keyframe.png

All the keyframes have position, scale and rotation selected for tracking method.

Rendering the sequence doesn't fix it.

This file was in Premiere Pro CC 2015.3, (the screen shots show this.) I opened it in the latest version of Premiere Pro and it's the same - still sticking on certain keyframes.

This is a mask on an adjustment layer. The adjustment layer has no time remapping. The clip below it has no time remapping either. The effect is Lumetri Color - Basic Correction.

In the Effects Controls panel, I can jump to the next keyframe using the arrows on either side of the 'add/remove' toggle. If I arrow forward or back with my keyboard, it seems the same to me as when I do this in the timeline. I'm counting the same number of frames (29.97.)  If I toggle 'track selected mask forward' I multiply the problem. I tried creating frames before and after each problem keyframe with "track selected mask forward 1 frame" then deleting the keyframe in between those two. Nothing seemed to change.

I tried deleting the first frozen keyframe and nothing happened, other than the previous frame was frozen until the next keyframe. I put that keyframe back. I tried manually creating a keyframe in between, to see if that did anything - just held the mask and created another 'held' keyframe. Then I deleted the middle frame (of the 3 'held' keyframes) and suddenly, the mask started behaving properly. I'm not sure what was wrong with that particular keyframe, but it seem to free everything up. I put it back, tried moving it around to see if it was not quite on the frame boundary, but it didn't seem to make a difference - it remained frozen. 

I seemed to have solved the problem by deleting it, which isn't really solving it. But for now, it will do.

Thank you for trying to help solve this. I've saved versions of this file. Perhaps when I have more time I can play around and try to nail this down, but for now, I'm going to move forward.

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Mask Path 'sticking' on certain keyframes

Explorer ,
Apr 14, 2017

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I have a mask on an adjustment layer. Keyframing is on. The problem is that the mask seems to get stuck in places and then jumps to next the keyframe. It will only do it between certain keyframes, not all of them. So, if I create a keyframe at positions A, B, C, D and E, say 6 frames apart, the mask will move between keyframes A-B, B-C, D-E, but it won't move between C-D. (I hope this makes sense.) I cannot figure out why it's locking on certain keyframes.

Here you can see the playhead is between keyframes, the mask is moving.

between keyframes working.png

Now here, this is one frame before the keyframe and it's stuck on the previous keyframe.1 frame before.png

next frame and it jumps to the keyframe

keyframe.png

All the keyframes have position, scale and rotation selected for tracking method.

Rendering the sequence doesn't fix it.

This file was in Premiere Pro CC 2015.3, (the screen shots show this.) I opened it in the latest version of Premiere Pro and it's the same - still sticking on certain keyframes.

This is a mask on an adjustment layer. The adjustment layer has no time remapping. The clip below it has no time remapping either. The effect is Lumetri Color - Basic Correction.

In the Effects Controls panel, I can jump to the next keyframe using the arrows on either side of the 'add/remove' toggle. If I arrow forward or back with my keyboard, it seems the same to me as when I do this in the timeline. I'm counting the same number of frames (29.97.)  If I toggle 'track selected mask forward' I multiply the problem. I tried creating frames before and after each problem keyframe with "track selected mask forward 1 frame" then deleting the keyframe in between those two. Nothing seemed to change.

I tried deleting the first frozen keyframe and nothing happened, other than the previous frame was frozen until the next keyframe. I put that keyframe back. I tried manually creating a keyframe in between, to see if that did anything - just held the mask and created another 'held' keyframe. Then I deleted the middle frame (of the 3 'held' keyframes) and suddenly, the mask started behaving properly. I'm not sure what was wrong with that particular keyframe, but it seem to free everything up. I put it back, tried moving it around to see if it was not quite on the frame boundary, but it didn't seem to make a difference - it remained frozen. 

I seemed to have solved the problem by deleting it, which isn't really solving it. But for now, it will do.

Thank you for trying to help solve this. I've saved versions of this file. Perhaps when I have more time I can play around and try to nail this down, but for now, I'm going to move forward.

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Enthusiast ,
Apr 14, 2017

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Hard to tell from the images but on image #2 it looks like you're on the keyframe rather than 1 frame before it. Are you magnified in at 100% in the effect's control panel timeline? Otherwise you'll only get an approximation of where the keyframes are relative to the playhead.

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Explorer ,
Apr 14, 2017

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Horshack,

I know it looks like it's on the keyframe, but it's not. I used the arrow (triangle) to move to the keyframe and then I stepped back one frame for the screenshot.

Here it is zoomed in (latest version of Premiere Pro 2017)

previous keyframe

Screen Shot 2017-04-14 at 4.01.54 PM.png

one frame before the next keyframe

Screen Shot 2017-04-14 at 4.01.29 PM.png

snapped to next keyframe

Screen Shot 2017-04-14 at 4.02.06 PM.png

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Enthusiast ,
Apr 14, 2017

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Ok, thanks. Your issue is that the keyframes aren't on actual frame boundaries - they're in between two frames. It's a quirk of Premiere I don't like. At 100% magnification in the Effects Panel timelime, drag your keyframe to the playhead to move it onto a video frame boundary.

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Explorer ,
Apr 14, 2017

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I'm not sure I understand where I'm supposed to drag the keyframe. It seems to me that it's on the frame boundary.

The play head shows that it's on the frame boundary. The keyframe is lit up (blue) as well. I dragged the keyframe around and it snaps to the same point. I know the line is not directly on the diamond points, but that's true on the keyframes that work as well.

I tried dragging several keyframes but I'm not seeing a change. first frame.png

I stepped through the frames here so you can see what is happening (hopefully the link works, if not IMG 0442 MOV - YouTube  )

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Enthusiast ,
Apr 14, 2017

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Looking at the video...based on the time markers on your main timeline and the movement of the playhead you're zoomed to 100% frame level on the sequence. Based on how it takes three frames to pass each keyframe diamond in your Effects panel you're zoomed about 3-4 clicks from 100% there, which means there could be an extra keyframe hiding in between. However, if there were we should still be able to see it in the Effects panel at your current magnification.

First, just to verify once again (I know you did a variation of this), use the keyframe navigation arrow buttons within the Effects panel to make sure there's not an extra keyframe just before the 4th on what I see in the video.

It's almost acting like the 3rd keyframe is set to "hold" interpolation, which can't be since mask keyframes only support linear.

Is this footage time-remapped (speed up/down) by any chance? Premiere has a lot of quirkiness with effect keyfames on remapped footage. Also, what type of effect is that mask on?

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Explorer ,
Apr 14, 2017

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This is a mask on an adjustment layer. The adjustment layer has no time remapping. The clip below it has no time remapping either. The effect is Lumetri Color - Basic Correction.

In the Effects Controls panel, I can jump to the next keyframe using the arrows on either side of the 'add/remove' toggle. If I arrow forward or back with my keyboard, it seems the same to me as when I do this in the timeline. I'm counting the same number of frames (29.97.)  If I toggle 'track selected mask forward' I multiply the problem. I tried creating frames before and after each problem keyframe with "track selected mask forward 1 frame" then deleting the keyframe in between those two. Nothing seemed to change.

I tried deleting the first frozen keyframe and nothing happened, other than the previous frame was frozen until the next keyframe. I put that keyframe back. I tried manually creating a keyframe in between, to see if that did anything - just held the mask and created another 'held' keyframe. Then I deleted the middle frame (of the 3 'held' keyframes) and suddenly, the mask started behaving properly. I'm not sure what was wrong with that particular keyframe, but it seem to free everything up. I put it back, tried moving it around to see if it was not quite on the frame boundary, but it didn't seem to make a difference - it remained frozen. 

I seemed to have solved the problem by deleting it, which isn't really solving it. But for now, it will do.

Thank you for trying to help solve this. I've saved versions of this file. Perhaps when I have more time I can play around and try to nail this down, but for now, I'm going to move forward.

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New Here ,
Aug 14, 2019

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I have the same problem! My mask is not on a adjustment layer, it's a normal mask by opacity.

Is there a solution to fix this bug? There's no animation between keyframe A and keyframe B. The - for example - 5 keyframes between A and B stuck like keyframe.

Please help me!

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New Here ,
Mar 20, 2020

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Same problem, it's stuck and not tracking the movements frame to frame, just stuck in the original shape I masked but not moving, any solutions? 

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New Here ,
Jun 18, 2020

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Hi there, I had been running into this problem, as well.  I'm not sure if this will apply to everyone, but I found what the problem was on my computer.  If I accidentally created a new point on the mask, and then hit the keyboard shortcut for undo, it would somehow stop the inbetween.  Simply hitting undo a second time seems to fix it for me.  I hope this helps others.

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