Fixing Alphan Channel edge artifacts for chroma key removal

[draemn]

So right now the fix I’ve found goes as follows:

1. Create 1 video track file that has greenscreen
2. Use chroma key to remove greenscreen
3. Apply any other filters and edits
4. Create another video track and copy/paste entire previous track
5. Add mask: simple shape to new track, set blend mode to “over”
6. Add Alpha Channel adjust to first video track with “shrink soft”

Is there a better way to do this? The problem is I’m putting the greenscreen footage at the bottom edge of the project/screen and the alpha channel is causing a gap along the bottom edge of the footage. So this method adds back in a sliver along the bottom without the alpha channel adjust applied. It’s a lot of extra processing work for the project and export.