make a video with the chromagreen background

make an image filled with same chromagreen color

open a few video tracks

insert instance 1 of the image in the bottom
video track, stretch it out to some length

insert the video in the track above it
beginning just before the end of the
green image track

place a copy of the stretched green image
in the track above the video track and
beginning just before its end

transition the tracks 2 at a time with
Transition>Dissolve

you will be able to render a video fading
from green and out to green

place the new video just made in a new
project above the desired background video,
chroma keying the green background color.

you can now render a video fading-in from
and out to transparency

enjoy

© bad sector :-)

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