do you want to know how to do a mask transition in filmora 9 that looks just like this
in today's video i'm going to give you a step-by-step tutorial with some really useful
tips so that you can do this in a quick and simple and effective way let's talk about it a mask
transition is one of many types of transitions that can be used to essentially transport the
viewer from one location to another or it can just be used to cut between two different camera angles
or from a wide shot to a close-up shot it works best if your two shots have some kind of movement
in the same direction and off a similar speed but we can always adjust this in the post-production
editing process for this to work you need to have some kind of object in the foreground that will
seem like it's passing completely across the frame as you move your camera so the object will start
on one side of the frame and as you move the camera it will seem like it's crossing across
the frame you could essentially use any object but in filmora 9 it is kind of a bit tricky to do the
mask transition so it does work best if your object has a kind of straight edge for example
a tree is a really really good object and very easy and simple to make a mask transition for
if you used other objects like a car or somebody walking past it is still possible but it would
take a few extra steps which i will not go into in today's tutorial okay so let's jump into my laptop
and i will give you the step-by-step tutorial so i've got my first clip here with the tree that
will pass across the frame and we're just going to drag it into the timeline as normal and then
what you want to do is find the part where the tree just starts crossing across the frame in my
example the tree is moving from the right hand side of the frame to the left so i want to find
the part where the background behind the tree starts showing on the right hand side here you
can see it's already too much so we're going to go back a little bit and we're going to try and find
the exact moment what you could do is stretch out the timeline all the way by clicking and dragging
on it or using the plus and minus area over here and then if you are not selected on the clip if
you have clicked somewhere else on the timeline you can just use your arrow keys on the keyboard
and we will find the exact part so you can see just here is where the background starts
showing so i'm just going to cut the clip by using the scissors icon or you could use ctrl
b on your keyboard so now you have your two parts of the clip you're just going to ignore the first
part for now and we're only working on the second part what you want to do then is go to sample
colors and select the green color now you should be careful because if you have a lot of green
in your clip maybe using the green screen one isn't ideal but for me the green here is quite
dark compared to this very bright green screen so i'm just going to drag that in as you can see it
is now covering the whole clip so we are going to select the green screen just by double clicking
and you can either just drag it or use the arrows to move it over so i'm just going to
move that right over and then i'm going to use my arrow keys for more precise movement
just so it covers that small bit of the background behind the tree then you could go to the next clip
just by clicking the next frame or again if you click somewhere else on the timeline you can use
the arrows to skip through the different frames what you want to do on the next frame is cut the
green screen it doesn't really matter if you cut the bottom clip as well that's fine and then we're
going to double click on the green and use your arrow keys for that precise movement to move it
so it's covering the whole background behind the tree again just go to the next frame and the same
thing you're going to cut the green screen and again just move it over and we will keep doing
this frame by frame it does take quite a long time but you will see that when you go through
the different frames you will see the tree and the green screen appear to be moving together
so when you come to the last few frames of this you might need to really increase the size of the
green screen and adjust the angle again and just make sure that it covers absolutely everything
um on the right hand side on the background off the tree and just keep going until the tree is
completely off the frame like this so this is my last um frame that i will cover with the
green screen then when you've finished and you've covered the very last frame with the full green
screen just make sure that you stretch out this green screen quite a bit further because you might
need um well you don't need to go that far but you might need to use the extra part of the green
screen for the next clip so in the end you're going to have something that looks like this
with the green screen and the tree moving together and all you want to do is then just export
this whole file and we will re-import it into a new timeline then you want to essentially
reset the timeline so just delete everything in the timeline and then you will import the
green screen clip that you've just made and also the second clip that you want to transition
to we're just going to drag these both onto the timeline and you're going to find the part
where the green screen starts coming through or even just before and we will put the second clip
underneath this clip this is very important now if we go a bit forward to where you can see the green
screen and click on this top layer and then go to where it says chroma key make sure you select that
and just to be extra sure you can always click the eyedropper tool and hover over the green to
make sure it's correct now sometimes the edge might look a bit strange so you could play with
the edge feather and change all these settings the edge thickness and so on for now i'm just going
to leave it how it was so if we play this through you will see that the second layer starts showing
through the first layer so that is essentially the transition now if you do want to make it a
bit less noticeable you could always adjust the speed by cutting the clips and clicking the speed
problems while doing this and i will try my best to help out and also don't forget to give this
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videos tips tricks and tutorials like this thank you for watching and i will see you next time bye