Multiple "size, position & roate" filter

Help/How To
1

Hi,
I’m trying to use multiple “size, position & roate” filter on a clip. The original clip size is 2688x2016 (4:3) and I put it into a 2688x1512 (16:9) video mode. It will be automatically shrinked to 2016x1512 (4:3) to fit the height.
When I apply the 1st SP&R filter with 150% zoom, it’s fine and fill the entire frame. But when I apply the 2nd SP&R filter without changing any setting (zoom=100%), it crops the video to 2016x1512 (same as the shrinked version).
The reason why using multiple SP&R filter is to fix a super unstable shot with motion tracker. Use the 1st SP&R filter with keyframes loaded from tracker to keep the target at the center. And use the 2nd SP&R filter to manually rotate (to compensate) and zoom-in the unstable shot. (rotation without keeping object centered first will mess the tracker up)
I thought the 2nd SP&R with 100% zoom will not affect anything, but it crops. Now I’m stucked and need some help.

2

sorry, this post should be in help/how to.

3

I think that at that step, before you continue with the other operations (stabilize and rotate) you should export the video.
You’ll end up with file that will already fit a 2688x1512 (16:9) project. Shotcut will not need to automatically shrink the video in the first place.

Then you should be able to perform your other steps without any problem.

4

Hi,

Thanks for the workaround.

But export (crop) will throw some of the frame alway, which is useful in stablize and rotate (those parts will be back into the frame sometimes).

5

Hi,

I think there are some functions can be improved:

  1. import
    (now) the larger resolution clip will be automatically shrinked to fit into the video mode. The SP&R filter will use this resolution as 100%.
    (workaround) use larger resolution video mode to prevent automatic shrinking. But might need to add a mask to indicate the actual frame size.
    (improve) Do not automatically shrink to fit the video mode when importing a larger resolution clip.

  2. SP&R filter
    (now) SP&R filter will crop the frame according to the “size value”
    (workaround) no
    (improve) SP&R filter only zoom & rotate, do not crop.