How do I get my mask and its keyframes to move with the strip as I move it across the timeline?

I Think there is some kind of bug because I have 2 projects open and both are acting differently when the same settings are used, and both are different than I remember all my other projects functioning. So if someone can explain/compare the generic case so I have that as a baseline that might help me.

In the generic: In a new project. Let's say I Insert a colour strip. Starting at frame 0 I make a mask of a circle that is keyframed to expand and grow larger over 10 frames. I set the mask's start point to 0 in the top N option. I apply the mask to the strip itself under modifiers->mask. I stick with relative mask. I can then move the mask around the vse timeline and have the animation, as it was playing in its original frame position, being respected. If I go absolute mask, its simply stuck in the last or first keyframe's original frame position, depending which its closest to in the timeline.

I have another project and the relative mask isn't working at all on it though. Only Absolute mask works, setting the start frame to 0 since I want it working at the start of the strip. Normally, this would work for the strip even if I move it around the timeline. But for some reason its not on this project or the generic one. Something weird is happening. It was working when I moved the mask around the timeline, then I applied a transform strip and everything, t using transform tools addon, went screwy. However it could have been a case of it giving false information as I can't remember if I refreshed the sequencer after moving it around or not. I'm of the mindset where it was working properly though as this is the method I remember doing with all my other projects without problem. So I'm inclined to believe pressing T and getting the transform strip on there messed something up. But I did the generic case in a new project and that's completely different than anything I remember about masking. I'm noticing tons of inconsistencies, are there any known bugs that might explain any of this? I just want a solution at this point.

  • $\begingroup$ Which Blender version are you using? What transform tools addon? I just transformed a masked strip in Blender 2.79 without any troubles: blend-exchange.giantcowfilms.com/b/5895 $\endgroup$ – doakey3 Feb 19 at 1:09
  • $\begingroup$ 2.79b. The original transform tools 1.0 kgeok, not any of the forked versions. $\endgroup$ – kite Feb 19 at 1:20
  • $\begingroup$ So this is the exact same as what I experienced when I also did a new project. So if that's the baseline..hmm. something screwy in my other project $\endgroup$ – kite Feb 19 at 1:29
  • $\begingroup$ What type of strip are you using in your other project (video, image, scene, meta)? Are you using a proxy strip? What happens when you just add a normal transform modifier without using kgeogeo's addon? Edit: is "Image Offset" enabled on this strip when you're adding the transform modifier? $\endgroup$ – doakey3 Feb 19 at 1:34
  • $\begingroup$ So I did the moving circle thing on a colour strip in the problem project, and it worked correctly. The problem seems specific to the strip type in question, which actually makes alot of sense in this case. It's a h.264 mkv video with a speed control of 0.5 applied (use as speed) and the audio file, enclosed together as a meta strip. I've had alot of weirdness happen when speed control is involved, its probably related to that. $\endgroup$ – kite Feb 19 at 1:41

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