Welcome guys to the first Aleck's shared of the section where we play time games with videos it's going
to be very interesting and actually it's very easy.
But I need your attention for certain details I would say that are very important and certain concepts.
Also if you want to follow along with me please open the file time games videos dash start dot AP.
I'm using the final one here so I can compile everything that you have done for you to open when you
complete the section.
OK guys the first thing I want to explore is the footage F B S meaning the footage frames per second.
Let's go and choose the setting.
This is a video that is 10 seconds long and one frame and 25 frames per second.
Let's create a composition with this video I would take the camp and put it inside the footage appears.
Maybe we'll create more camps.
You can have them all together.
The timeline here is in seconds.
Right guys.
OK.
But then if you come to the left here you can press control or command on the Mac and click and switch
to frames not frames per second two frames.
Now you see your timeline in frames now now if you control click again a comment click on the Mac you
will go back to time.
I would like you to select the footage over here and double click to open it in the footage panel.
If you notice our footage now if we zoom out completely here is of course 10 seconds.
You can see the time here come over to this time and press control of command of the Mac and you'll
switch to frames.
You'll notice that our footage is 250 frames.
So let's remember two things.
Footage is DJUANDA 50 frames and 10 seconds long.
Let's go back to the composition here and change the time two frames an hour right click and go to composition
setting and make it a whole.
One minute I need the time to show you.
So now the cup is only one minute.
Let's zoom out and you can see come to this button here.
It says into play footage if I click on it it will open into it for this for selling that and before
so we are working on the footage not on the come nothing else but the footage itself our interest is
in frame rate.
You can use the normal frame rate that came with the video.
There will be five frames per second or you can force the video to go to a certain frame rate.
So they say conform to frame rate.
Let's say we want to put it at 50 frames per second.
Now the time of the video has stretched down to five seconds.
So click OK.
That's what's happening here in the timeline the video.
Now if I go to the outpoint It's now five seconds and if I double click to edit it in the footage panel
it is five seconds.
Let's switch to frames.
It's still 250 frames in the footage.
It did not change the number of frames within the video itself but it's five seconds.
You took 250 frames for 10 seconds and you brought them inside.
Five seconds.
So you know I hope the disillusion is pretty good.
Now let's go back to our composition here.
And you can see it is at one hundred twenty five frames the outpoint.
Where did the rest go.
I mean I MiSeq 125 frames.
Well the first reason is if you right click position setting it is at 25 frames per second half the
frame rate of the video.
And that's why to conform with time after effects had to drop 50 percent of your frames.
Let's go to the beginning and zoom in to the maximum to see the flames.
I will is page down and page up to move one frame at a time.
If you're not as your video has been dropping frames you need to drop 125 frames and you see the movement
is a bit jumpy now.
It is required that it conforms to the frame rates of the composition hence the dropping of the frames
if you come and preview your video.
You will not see any change after effects we'll do a good job but I chose this video because you can
see it's jumping.
It's not so cool.
It's not so smooth because that dropped so many frames.
Let's go back to the footage here.
And let's go back to time and let's go back to the footage and instead of 50 frames per second let's
make it 12 frames per second or even 10 frames per second.
Ten frames is nice.
Now your footage has become 25 seconds long in the composition.
In fact Cliq you will notice it's 25 seconds.
Let's go to the footage here and we need to zoom in now.
It is really 25 seconds.
Let's go to the frames here.
And you notice it still 250 frames so the footage did not really change.
You still have 250 frames in the footage.
But now is distributed all along.
Twenty five seconds.
So it really has to create some new frames so this can work.
Otherwise it would be very jumpy.
Let's play it over here.
Here it will be I'm not quite jumpy.
That's what's happening here.
Let's render fact let's open the info here is cool.
So let's jump in.
Let's go to the composition now.
Select the lead itself and press or we are at the point in the outpointed you notice we have six hundred
twenty seven frames build Fidesz is trying to 50 and in the camp you need six hundred twenty seven frames
so you can conform to the composition settings of 25 frames per second.
OK.
Where did this film come from.
Really he added I don't know 200 300 frames.
Let's go inside and check exactly what's happening.
First frame second frame.
Nothing is moving.
Third frame nothing.
Nothing is moving.
Not just now.
Oh well now it moved one frame could then we move on.
And then the frame.
So exactly what aftereffects did in this condition.
This is the conditioning.
I explain about it.
It has just duplicated the frames to be able to cope with the 25 seconds and the footage being 250 frames.
So it added so many frames identical.
If you notice to each other.
So it can cope with this.
Twenty five seconds.
And if you come back here and play here you are you know it's small.
It's not bad but it's ok since it has added the lower frames.
It used here what we call the frame blending and the frame blending is just over here you can see the
switch for frame blending.
Now when there is nothing inside here it's using a whole frame.
It means duplicate frames until it gets the result of you know filling the hole time for the video.
But now there is another option if you click just once.
Ok this will be now the mixing of frames.
It means after effects it's going to take two frames and tried to figure out what's in between and to
create a frame to see that.
Let's zoom in.
OK that will be OK.
Let's go page down.
Notice nothing is happening.
Suddenly there is a kind of a frame here.
OK like a shadow.
We call it ghosting.
And then if we move on.
You notice how the ghosting is happening.
So it has taken two frames before and the next and has mixed them and created the middle frame that
is somehow ghosted.
This is called free mixing or in short frame blending.
Here you are.
You notice how it's happening.
Now if you watched the video.
Normally we go to 100 percent you know the results look we can see that the eye can see this.
OK guys if it's going to YouTube and Facebook and Duyk videos on the Web site.
It's OK but if you're doing a professional job for TV or movies then this will be trouble.
But here it's OK and we can see the ghosting and the music.
There is another switch here.
If you click again and you have what we call the pixel motion and that is very strong in after effects.
Let's zoom in over here and that's what's happening.
If I move one frame at a time and zoom out just a bit.
OK.
If it goes down we are moving one frame at a time and not as the ghosting has disappeared.
But there is a new frame or a composite frame in every frame you are.
So the pixel motion will take the previous frame and the one that's coming and create a new frame from
mixing the pieces together.
Hence you don't have the shadow lots of people come and tell me why don't I change the composition settings
here.
I make it 50 and I don't need the blending.
Well you could do that and then you have a composition of 50 frames per second.
But if you want to post it on a site that is demanding 30 frames per second or 25 frames per second
just like you do me they like 15 frames per second for screencast.
Then you have a big problem.
You can put this at 50 frames per second you needed 15 frames and start playing games or changing the
blending.
So you get very nice videos.
Thanks very much.
I hope this was very interesting for you.
And please feel free to ask me all the questions you want to ask and become a pro and that is very interesting.
Thank you.
I'll see you in the next election.