an oval mask in After Effects is not converted, remains rectangular. Only when I pull the mask extension to minus does the oval shape slowly appear. This has only been the case since the last update. Before, you double-clicked on the oval mask symbol at the top of the bar and the mask was immediately displayed as an oval. The line-shaped mask outline now appears, but the video remains rectangular.
Sorry for my english but i can only use google translate
I'm pretty sure that the problem is associated to some of the effects you applied to that layer. Effects are processed after masks and can affect them. What you can do is to precompose this layer without the mask, including all the effects. Then create the mask over the precomp and I'm sure it will work.
As Jose says, it's mainly an effects issue, try to turn off all effects and check if you still get the same problem, if so you need to pre-comp your layer before applying the mask
Thank you for the feedback. The only effect that lies before the mask is applied is the stabilization effect. I always use all others, whether brightness etc., according to the mask, otherwise they cannot be conclusively assessed. The stabilizing effect must, however, take place in front of the mask.
No problem at all. You can stabilize the footage, precomp it and apply the mask to the precomp layer. Also, you can use a track matte for your mask: stabilize footage, create a solid above the stabilized layer where you will apply the mask and use the Track Matte alpha on your stabilized layer to let it use the layer above for masking.
There are a lot of ways to do it. As you comment us, not all effects have the same behaviour with masks but After Effects will always use this pipeline render: masks, effects and transformations. So when you need to change this order you must precomp or use effects.
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