Transitions
are video effects to go from one
clip to another, we can
obviously do without them in
this case we will go abruptly
from one clip to another. You
will note that we will not put
them everywhere because the
excess of transitions can make
the video heavy to watch. To set
up a transition, we must prepare
the clips by overlapping them
(for the duration of a
transition) from one track to
another like this:
By
selecting the clip of the V2 track
at the top, we bring up from the
context menu by clicking on the
right mouse button and Add
composition we choose a
composition of the Wipe/Translate
type
it will be necessary to reduce the
size of the composition so that it
is limited to the overlapping
duration of two clips, in the
central position we will find the
properties of the composition,
with the cursor we will be able to
see in the video monitor the
effect of the transition.
Little by little we will place
transitions, move and adjust the
clips, this is what it looks
like with the complete sequence,
you will notice that all the
clips do not exceed the
soundtrack.
The compositions explain in
particular why clips are placed
on several tracks and not on
just one so that the clips can
overlap.
A
filter or more commonly effect is
a particular video treatment that
modifies the appearance of a clip,
we will quickly understand what it
is by selecting a filter in the
filter library. We access it via
the Filters
tab. They are stored in several
categories (Alpha, Enhancement,
Artistic, Audio, Border, Color,
Distortion, Color effect, Audio
filters, Blur, Motion,
Transformation). They are also
accessible by selecting a clip
then from the context menu Add
a filter.
In the example below I selected
the Contrast
effect that I dragged and dropped
onto a clip in the timeline. We
can then adjust the properties of
the filter which are visible in
the central position. We can also
see the two sequences appear, the
active sequence is marked with an
active.
To switch to the other sequence
and make it active you will have
to double-click on it.
The
Clip Filters Stack
area allows
you to view the list of filters
that are applied to a selected
clip, add them, remove them, and
enable/disable them.
To
switch filter properties from one
clip to another, you will need to
double-click on the clip. The
selected clip appears with this
little symbol, a sort of white
square placed in the middle of the
clip.
Still
in the effects/filters section if
you click on the button you open the
G'MIC
effects window
you load a video with the Load
Clip
button , note that it is not
necessarily a video that has already
been loaded into the project. Then
you choose an effect from the list
(below on the left at the Cartoon
level),
in this case I chose a Cartoon
effect and
by clicking on Preview we
see the result that is displayed.
Note at the bottom left, the
information messages of the gmic
command that are displayed. You have
a copious choice of effects they are
arranged by category as can be seen
below
that's not all, you will select the
part of the video that you want to
keep and use with the Mark In
and Mark Out tools
by default it will
generate a series of images that
will have to be reintegrated into
the project, I choose to also
generate a video corresponding to
the selected part of the original
video and with the Cartoon
effect that has been applied. For
this I check Encode
Video, I
enter the destination directory of
the video, the name of the final
video and the rendering parameters
This is what our G'MIC
window now gives us, we can see the
gray selected part between the
marks. The Frames
Folder
indicates the directory where the
images will be found, then we click
on Render.
Rendering is quite expensive in
system resources.
This will generate a video (and a
series of images) that will need to
be re-imported into the project in
order to use it.
Otherwise, by selecting a clip from
the Export
to tool
context menu , you can
- Slow/fast motion
: speed up or slow down a clip
- Reverse
: reverse the clip
From
the same menu you can add
a fade
to black when opening or closing.
We will now create a title clip
from the titler button
,
this will also be an opportunity
to illustrate the sequence
functionality with Flowblade.
For now we will therefore create a
really basic intro title with the
titler.
This will generate a png
file that will need to be saved
somewhere. We will now create a
new Title
sequence , this will completely
reset the timeline and it amounts
to making a new montage. In this
case we will simply import files
to create a credits sequence, we
will import in particular the png
file created previously. In the
example below the credits will
consist of our title, an
introductory soundtrack and a
short video. I will spare you the
steps, but below we find the new Title
sequence,
a specific
Bins
directory which
contains the credits files. To
allow the text to be embedded on
the video track, we will apply an
Affine
blend
composition.
It's exactly the same principle
if you want to add a subtitle
somewhere in your video to make
comments, without necessarily
having to create a particular
sequence.
Flowblade
has the keyframe feature, this
feature is interesting when you
want to make editing a bit more
advanced. They allow you to
sequence a clip by stopping
points that mark a particular
event. To illustrate the
interest and the functioning of
keyframes, for the last clip of
the sequence that closes the
video we will set up a filter
with the image that will
translate and disappear little
by little with the black
background that will take its
place. To do this I move the Position Scale
filter on the clip.
Notice the strip at the filter
properties that allows you to
place keyframes and the VCR just
below that allows you to move
from keyframe to keyframe.
You'll see that if you move the
red cursor, you'll move around
the clip.
With the + I will create 2
keyframes
in
addition to the first one at the
beginning of the clip. The idea is
that between the first and second
keyframe the properties of the
effect do not change, while they
will change between the second and
last keyframe. For the properties
of the last keyframe, I move the
frame in the middle of the Position
Scale
screen completely outside the
monitor. In fact, between the 1st
and 2nd frames, nothing changes
and between the 2nd and last we
will see the image translate
little by little until it
disappears.
Still on the same keyframe line,
you can move them by drag and
drop.
Please note that keyframes apply
to most filters, the keyframe line
is not displayed by default, in
the filter properties, you will
first need to click on this button
.
Last illustration of the key
frames, for the last clip, I added
on the lower track a black color
clip ( Project->Create
a color clip
), between my last clip and the
color clip I added an Affine
blend
composition . Now for the last
clip I added an Alpha->Wipe
filter . I placed 3 key frames,
there is no change of properties
between the 1st and the 2nd key
frame, however the threshold
evolves between the 2nd and the
last key frame so that the image
disappears completely to make way
for the black background.
We can also play with keyframes to
vary the volume of a video (or
audio) clip by placing the
keyframes on specific events in
the timeline. To do this, select a
clip and then from the context
menu choose Edit->Volume
keyframes.
The window below appears and with
only the mouse we will create and
move the keyframes.
To find the filter properties and
be able to modify the key images,
you will need to select the clip
and go to the filter properties,
we will find our key images
created previously.
We had an introduction to the
sequences previously, we will
now finalize the video by adding
the title sequence at the very
beginning of our sequence of
clips. We will first place
ourselves at the very beginning
of the timeline, then from the
menu Sequence->Import
Another Sequence Into This
Sequence.
A window appears where we can
select the sequence, by default
it is added ( Append
) at the end of the active
sequence, I choose to place it
at the cursor which was placed
at the very beginning.
And here is my finalized project
with the Title
sequence which is found at the
very beginning of the timeline.
Now, so that the sound of the
video tracks V1 and V2 do not
overlap with that of the
soundtrack, we will mute the
tracks V1 and V2 via the audio
mixer by clicking on the button
.
A separate window appears, I
have set the level of the tracks
V1 and V2 to 0.
Be careful if you have used proxy
videos, you will have to tell it
again to now use the original
videos ( Project->Proxy
Manager
) we click on Use
originals
and the Current
proxy mode
must specify Use
originals
Now
we will click on the Render
tab and
enter the information about the
file name and encoding format.
We launch the rendering from the Render->Render
montage
menu , here is the result