Users are advised that their specific speedups are dependent on system
configuration, specific GPU, and features of Twixtor that are used.
Customers who have used Twixtor 5 should test the demo to make sure they
will see the speedups they desire before upgrading to Twixtor 6.Finally, we applied twixtor pro and used the matte. Simply put, the twixtor pro results look perfect, and while 99 percent of the frames were completely fabricated, it had us convinced.
While this looks slightly better, it still appears fairly jerky.If you don’t have additional software or plugins, you’re pretty much stuck with these options. But if you have After Effects or a third party plugin like Twixtor, you can get better results. For video tutorials on using Twixtor, you can click on the links. Now Let’s dive into after effects and see what it can do.
Twixtor raises the bar in motion estimation. Twixtor is much more accurate, tracks objects farther, and exhibits fewer artifacts when there are objects crossing in the scene. This means less tearing and stretching of objects as they cross or go out of the frame.
Rather than throw in the towel we decided to give twixtor a shot. Twixtor is a 3rd party plugin designed to do exactly what we’re attempting to do, create frames when they simply don’t exist. There’s a standard version and a pro version. We applied the standard version, and here’s our result.
Clearly, on this challenging footage, twixtor was up to the task. It did help that the shot was static, and the background didn’t have a ton of detail in it.
If you need to use these effects, there is a rather simple workaround: Precompose the layer on which the first problematic effect is applied, and then apply the second effect to the precomposition layer. Or you could pre-render the intermediate result from the first effect and then apply the second effect.
Both timewarp and twixtor pro have the ability to use a matte layer you create to aid in the creation of frames. Of course in order to do this, it means rotoscoping or masking the sections you want to slow down, which can be a time consuming process.
Using timewarp, you can see that the bars of the fence don’t move in a natural way, and there’s a lot of pixels surrounding the subject that are moving with it. Not an ideal result.The standard version of twixtor fared about the same. Again notice the fence posts and the warping occurring around the subject.
Nick Brooks, Academy Award and Emmy Award winner for visual effects says, "Twixtor represents a new touchstone in retiming. The difference in accuracy means that retiming artifacts are either drastically reduced or disappear on the hardest to retime footage. "
In an ideal scenario, all your slow motion shots would be pre-planned,
and you could shoot at proper frame rates to get great looking, frame
accurate, slow motion. But what if you want to slow down regular old 24
or 30p footage, or you want to slow down 60 or 120p footage beyond the
frames you have? Using the right tools with the right footage can give
you results like this… In this segment, we talk about faking slow motion
in post production, including what type of footage works best, and the
results you can get using using clip speed, frame blending, timewarp,
and twixtor. With the right combination of footage and properly applied
effects you can achieve stunning results Getting glass smooth slow
motion was once a pretty tough task for the average videographer. But
many of today’s cameras that shoot 60 and 120p are reasonably priced, so
getting that film quality slow-mo is well within our grasp, and if
you’re a plus member, you can watch a full tutorial on shooting
techniques for slow motion by clicking on the link. Of course, as video
producers, we’re always trying to push the technological limits, and
once 40 or even 20 percent slow motion was within our reach, we
immediately wanted to slow our footage down even further, or maybe we
just wanted to take footage shot at standard frame rates and get regular
slow motion to look better. Let’s talk about our options. Most video
editing software will allow you to slow down a video clip, but all post
production slow motion abilities are not created equally. Any type of
“digital” slow motion will require interpolation of frames. Let’s say
you’ve got 24p footage, and you want to play it back at 50 percent. Now
those same 24 frames you captured have to cover 48 frames in real
time. To achieve this, frames will either have to be repeated, causing a
stuttery slow motion effect, or the software will have to create brand
new frames from the preceding and following frames to fill in the
blanks. Let’s take a look at some examples. Here’s a clip of our
skateboarder moving on a path at regular speed. This footage was shot at
24 frames per second. Let’s dive into premiere, to see what we can do
to slow it down. We’ve got the clip on our timeline, and by right
clicking it we can select speed/duration. Now we can change the speed
to 50 percent. If go to the beginning of our clip and advance one frame
at a time, you’ll notice that in order to slow the clip down, Premiere
is simply repeating each frame twice. This is going to result in a
stuttery type of slow motion. Let’s take a look. For a smoother look,
right click the clip and select frame blend. Now if we go frame by
frame, you can see that premiere is creating new frames by blending them
together. Let’s take a look at the playback. While this looks slightly
better, it still appears fairly jerky.If you don’t have additional
software or plugins, you’re pretty much stuck with these options. But
if you have After Effects or a third party plugin like Twixtor, you can
get better results. For video tutorials on using Twixtor, you can click
on the links. Now Let’s dive into after effects and see what it can
do. Using time effects in After Effects requires just a bit of prep
before you start applying effects. Because after effects won’t let an
effect extend the length of your clip, you can either right click the
clip and enable time remapping, or you can precompose the clip by right
clicking and selecting precompose, or hitting control shift c. I find
it easier to precompose the clip, because it allows you to trim the clip
in the precomp to avoid navigating through the original clip once your
effect is applied. We’ve got our clip all trimmed, so let’s apply
timewarp. Timewarp defaults to 50 percent playback. If we go frame by
frame, you can see that timewarp is actually creating brand new frames
with no blending. Let’s take a look at the playback. Slowed down to
50%, the shot appears smooth. Of course, there are many settings you
can change in the timewarp effect if your initial results don’t look
right. For a list of controls and what they do you can click on the
link. Our first shot is a pretty good candidate for faking slow motion.
If you’re going to shoot with the idea of slowing down footage in post,
or you’re looking for ways to identify footage that might work without
too much trouble, look for wide shots that have a static camera, plain
background, and small movements from frame to frame, with minimal or no
motion blur. This in not to say that slow motion effects won’t work on
other footage, but your results are going to mixed. let’s take a look
at some examples. This kickflip footage was originally shot at 120
frames per second, so we were able to slow it down to 20 percent with
complete frame accuracy. But now we want to take it further and slow it
down to 10 percent. Notice how the shot is fairly wide and static.
Let’s see how it looks with speed adjustment, frame blending, and
timewarp. Clearly, timewarp delivers some pretty astonishing results.
Even the flipping board looks good without any warping or distortion.
Now let’s up the ante. Shots that have fast motion can be difficult
because the objects on screen move a great distance from one frame to
the other. Couple that with a rotating skateboard and it makes it
particularly tough. Let’s take a look at an example. This kickflip over
the camera in real time doesn’t show much… now here’s the shot slowed
to 20 percent with actual frames because it was shot at 120 frames per
second.Next we tried applying timewarp to slow it down to 10 percent.
Let’s take a look. You can see that while the motion of the subject was
pretty decent, the graphic on the board is a dead giveaway. Despite
tweaking nearly every parameter in the list, we couldn’t achieve what we
considered usable results. Rather than throw in the towel we decided
to give twixtor a shot. Twixtor is a 3rd party plugin designed to do
exactly what we’re attempting to do, create frames when they simply
don’t exist. There’s a standard version and a pro version. We applied
the standard version, and here’s our result. Clearly, on this
challenging footage, twixtor was up to the task. It did help that the
shot was static, and the background didn’t have a ton of detail in it.
Okay, now let’s push it to the extreme, and try to get the look of a
true high speed camera. We’ll start with a shot that’s tough to slow
down in the first place. Here’s our shot in real time. It was shot at
60 frames per second. This shot is tough because there’s fast motion, a
moving camera, plus those vertical bars on the fence will be
problematic. We’re going to take an isolated section and try to slow it
down to a 1 percent playback speed. This is essentially mimicking a
camera that shoots 2400 frames per second. Let’s see the results from
our different attempts Using timewarp, you can see that the bars of the
fence don’t move in a natural way, and there’s a lot of pixels
surrounding the subject that are moving with it. Not an ideal
result.The standard version of twixtor fared about the same. Again
notice the fence posts and the warping occurring around the subject.
Both timewarp and twixtor pro have the ability to use a matte layer you
create to aid in the creation of frames. Of course in order to do this,
it means rotoscoping or masking the sections you want to slow down,
which can be a time consuming process. In our case we used the rotoscope
tool to create our alpha channel matte. for more on using the rotobrush
in cs6 and earlier, you can click on the link. Now let’s dive into
after effects to see how we used it. Okay, now that you have an idea on
what it takes to try to work with difficult footage, let’s see if the
results are worth the trouble. Here’s the result using the matte in
conjunction with timewarp. It’s a clear improvement, and well worth the
rotoscoping. There are still a few frames that aren’t perfect, but the
end result is much better. Here’s the result using twixtor pro with the
matte, and it’s a vast improvement as well, eliminating nearly all of
the issues in a challenging piece of footage. While some of the shots
we’ve used so far were shot with faster frame rates, none of them were
shot with the specific idea of using ultra slow motion effects in post.
So we decided to try all the effects on a shot that was specifically
taken with super slow motion in mind. Here’s our shot at normal speed.
We used a 1/2100th of a second shutter speed at 60p to get the maximum
amount of frames from our 5D Mark III with no motion blur. Shooting
this way requires a ton of light, which is why we headed outdoors. If
you want to know more about using shutter speed to control motion blur
and you’re a plus member, you can click on the link for a full
tutorial. Ok, now let’s see how our effects handled the shotUsing
timewarp yielded some good results, but we still had the issue of
warping close to the subject. The standard version of twixtor looks
fairly similar, again with the warping issues around our main subject
With the easy way blocked, we veered off the path to the hard road, and
took the time to rotoscope the shot to see how much improvement we could
get. Using the matte for timewarp was a huge improvement, but, there
were certain frames that were total dealbreakers. No matter how we
tweaked it, we couldn’t get it to look right even with the matte
Finally, we applied twixtor pro and used the matte. Simply put, the
twixtor pro results look perfect, and while 99 percent of the frames
were completely fabricated, it had us convinced. Converting regular
footage to slow motion, or even fast frame rate footage to super slow
motion is a daunting task. Many times the footage itself is going to be
the determining factor in what tool you need, if it’s even possible to
get the effect you want. But when it works, it offers some truly
impressive results, that are well worth the time and effort. Link Download :
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