[Cin] How do I crop a picture-in-picture?

[Rafa Mar Multimedia en Gnu\Linux]

I think what he wants to do, what will really be good for him is to wear a
mask. F3 in the composer.

Another option is to edit this video that you want to put on top, with the
measurements you want 1:1, export it like this, and then insert it into
this project.

El vie., 17 abr. 2020 a las 1:18, Phyllis Smith (<phylsmith2017 at gmail.com>)
escribió:

> Have you tried the "Crop & Position" plugin instead of the "Crop tool" in
> the Compositor?  IgorBeg is the expert on usage.
>
> On Thu, Apr 16, 2020 at 4:43 PM David Given <dg at cowlark.com> wrote:
>
>> I have two video tracks; one is overlayed on the other. I'm using
>> projector automation to put the overlay video in the corner of the
>> underlying video. I would like to crop the overlay video so it only shows
>> the section I'm interested in. The overlayed video is a 1:1 image in the
>> middle of a 16:9 video, and I just want to show the 1:1 bit. I can't figure
>> out how to do this.
>>
>> - I thought I would be able to use the camera automation to scale the
>> image after I had placed the projector, but while this works, it happens
>> *before* any track plugins are rendered, and as one of these is rotation
>> I always end up with a rotated rectangle on the screen. (With black
>> borders.)
>> - using the crop plugin adds more black borders.
>> - I tried a mask, but I haven't found out how to invert the mask (i.e. I
>> draw the area I want displayed so that everything else is cropped); plus
>> cropped areas show up as black.
>> - I simply can't get my head around the crop tool.
>>
>> The best I've come up with is to add a scale plugin to the track to
>> resize it up a bit, so that the black wedges caused by the rotate plugin
>> aren't visible; then adjusting the camera to zoom in on the are I'm
>> interested in; but I haven't found a way to change the *shape* of the
>> projector yet. It's always a 16:9 rectangle, but the area I want to show
>> isn't that shape.
>>
>> What's the right way to do this? Ideally what I would like is the ability
>> to draw a path on an object on the screen and say 'clip this object to this
>> path'. Does anything like that exist?
>>
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