---
title: 'using ai to interpolate 30fps to 60fps – flowframes tutorial'
source: 'https://youtube.com/watch?v=bxOvxTuvUag'
video_id: 'bxOvxTuvUag'
date: 2026-06-16
duration_sec: 0
---

# using ai to interpolate 30fps to 60fps – flowframes tutorial

> Source: [using ai to interpolate 30fps to 60fps – flowframes tutorial](https://youtube.com/watch?v=bxOvxTuvUag)

## Summary

The video introduces Flowframes, a free AI-powered tool that interpolates frames to double video frame rates (e.g., 30fps to 60fps). It compares Flowframes with After Effects' optical flow and the paid plugin Twixtor, demonstrating that Flowframes produces smoother results with fewer artifacts. The tutorial also covers practical workflows, including using Flowframes to save render time by rendering at half the target frame rate.

### Key Points

- **Introduction to Flowframes** [0:13] — Flowframes is a free tool that uses AI to generate frames between existing frames, effectively doubling the frame rate of a video.
- **Optical Flow in After Effects** [0:26] — Optical flow is a built-in After Effects feature for frame interpolation, but it works best only for very slow-moving footage.
- **Twixtor Plugin** [0:34] — Twixtor is a paid plugin that handles faster movement better than optical flow but still suffers from ghosting and warping.
- **Flowframes Comparison** [3:12] — Flowframes outperforms both optical flow and Twixtor in fast and slow motion scenarios, producing cleaner interpolated frames.
- **Render Time Saving Workflow** [4:43] — A practical workflow: render at half the target frame rate (e.g., 15fps), use Flowframes to double it to 30fps, and re-render only problematic sections at full frame rate.
- **Flowframes Settings** [5:28] — Key settings in Flowframes include interpolation multiplier, output mode, deduplication (removes duplicate frames), and scene changes (avoids interpolation across cuts).

## Transcript

hey everyone today i wanted to show you
a pretty cool tool i found that uses ai
to generate frames between your frames
essentially making it so that you can
feed in a 30 fps video and get a 60fps
version out of it and arguably best of
all it's free and it's called flow
frames
when it comes to interpolating frames
which is just the act of having a frame
a and b and then creating a new frame in
between those two there's already a
couple ways we can go about doing that
without flow frames but in my opinion
they're just not as good after effects
is a built-in feature called optical
flow that you might have used before and
there's also one that you've likely
heard especially if you're hitting up
some sick call of duty montages back in
the day and that one's called twixtor
which is a paid plugin so real quick
i'll set up a comparison between optical
flow twixtor and flow frames where i
take this clip from into the spider
verse and slow it down to 50 speed in
each case these tools are going to be
interpolating the frames to make the
slow motion look smoother to use optical
flow to slow down our clip all we need
to do is drag it into a comp make sure
the composition is at least two times
longer than the clip itself then right
click the clip go to time time stretch
and then stretch it to 200 percent now
doing that alone is going to stretch the
clip to twice as long but if i step
through frame by frame you can see that
it isn't interpolating frames we get a
real frame then a paused frame that a
real frame that a pause frame and so on
to actually use optical flow to
interpolate the frames creating a new
frame in between the real ones we just
need to hit this frame blend switch
twice once changes it to standard frame
blending which is just essentially
putting the next frame over the current
frame and setting the opacity to 50 but
hitting the frame blend switch that
second time switches it to the optical
flow frame blending where after effects
is actually trying to interpolate
between your frames to create a new
frame now with that all rendered out you
can see that optical flow is mostly
garbage but if things are already moving
very slow it does a pretty good job like
in these two shots
and here's a comparison between no
interpolating at all on top and using
optical flow below so there definitely
is a time and place where using it can
work for you just most of the time it's
not going to be a good option next let's
take a look at twixtor again here we're
going to import our clip into our comp
making sure the comp size is at least
two times longer than the footage but
instead of time stretching the clip
we're gonna have to nest our comp so
dragging the composition into the new
comp button we've got that sorted now on
this new nested comp i'll apply the
twixtor effect i'll enable gpu and i'll
set the speed to 50
now rendering this out you can see that
twixtor definitely does a better job
than optical flow when it comes to the
faster moving parts if i put optical
flow up top and two extra on the bottom
you can see that it's pretty clear who
the winner is now let me show you the
main event the show stopper the one the
okay enough i'm simply gonna drag the
clip onto flow frames making sure it's
set to two times interpolation and hit
interpolate it does its thing and then
we've got our video with double the
frames now just to be clear what we get
out of flow frames isn't slow motion
this clip is the same speed as it was
going in but it has double the frames
because flow frames interpolated a frame
in between every real frame making it
look a lot smoother that was a lot of
frames in the same sentence so when we
import this into after effects and we
make a new comp we need to go into the
comp settings and make sure the frame
rate is set to the same frame rate as
the original clip in other words half of
what our new interpolated clips frame
rate is then again making sure the
comp's length is at least twice as long
as our clips we hit ok then we'll just
right click our clip go to time time
stretch and stretch it to 200 and we're
done this is our flow frames
interpolated slow motion i'll show you a
comparison with twixtor in a second but
flow frames is handling the
interpolation of faster movement so much
better here we've got twixtor up top and
flow frames on the bottom if i step
through frame by frame to show you how
they both deal with faster movement here
we can see we're on our real frame and
then next we've got an interpolated
frame with twixtor we've got some heavy
ghosting and even some of the frame
being pulled down up top here and none
of that with the flow frames version if
i go forward a little bit more oh boy
lots of ghosting and the edges of the
screen being warped inwards on both the
top and bottom of the twixtor version so
you get the point now i'm sure optical
flow is decent if your footage is moving
very slow already twixtor is much better
at handling the faster moving
interpolations but flow frames takes the
cake in both fast and slow moving
scenarios it's also just a really great
way to quickly and easily take any media
you have and double its frame rate so
that it looks a lot smoother you can do
it with anime video games movies renders
it won't work flawlessly with every
render but you could save yourself a lot
of time if you just export your stuff at
half the frame rate and then use flow
frames to double it back up to where it
needs to be because sometimes you're
looking at like 10 minutes of frame on
more complicated scenes so if you've got
a render where things aren't moving
super fast flow frames might be a good
option for you in terms of saving a
bunch of time as a bit of a trickier
example here i've got a render for a new
version of my intro that i'm working on
i rendered it at 30fps because that's
what all my videos are rendered at
except for this one but if i re-render
the intro at 15 fps here's what we've
got there's a lot of fast movement at
the beginning especially so i feel like
flow frames won't absolutely nail it but
if we chuck it in there and ask it to
double the frames back up to 30 fps
here's what it spits out now like i said
at the beginning there seems to be a bit
of artifacting but other than that it
pretty much nails it a good workflow i
can imagine doing is rendering my stuff
out at 15 fps running it through flow
frames to bring it up to 30 and then any
area where i see flow frames having
trouble i can just re-render that
section in blender at 30fps and comp it
back over top to cover up any issues
that way i'm pretty much getting away
with rendering at 15fps and only having
to re-render at a full 30fps for the
sections that flow frames can't
interpolate smoothly which in the end
will save me a ton of time now as far as
where to get it i'll leave a link in the
description it's absolutely free to
download and you can choose to support
the creator on patreon in order to get
access to early updates after you
download and install it you pretty much
just need to drag a video file onto the
program and it'll sort out most of the
settings for you all you really need to
worry about is how much to interpolate
by the output mode and two settings
called detuplication and scene changes
setting the interpolation amount is
pretty self-explanatory it shows you the
fps of the video on the left and on the
right it shows you what the output fps
will be then you just choose the
multiplier the output mode is also
pretty obvious if you can work after
effects i have confidence in your
ability to sherlock homes what this
could possibly mean and the last two
settings of note are deduplication and
scene changes deduplication is for if
you have footage that's 60fps for
example but if you step through it frame
by frame you actually see that every
other frame is a paused frame that would
mean your footage is actually 30fps but
it's just been rendered out at 60fps for
no reason deduplication basically just
tries to remove those paused frames
before interpolating which will lead to
a much smoother output lastly the
setting for scene changes just exists to
try and detect
scene changes that way it won't try and
interpolate a frame in between two
scenes if i turn the setting off and
then run the spider-verse clip through
again you can see that between these two
scenes we get a mushy morphed frame
which you probably don't want so i'd
leave that setting on and that's pretty
much all i had to say about flow frames
if you're into programs like this that
you can toy around with and help with
your editing i made a similar one on a
program called ebsynth that i recommend
you check out it's one of the most
viewed videos on the channel so i guess
people like it now that we're done with
the tutorial let's get to the part
you've all been waiting for the no
contacts poll you know the part where i
do whatever you guys tell me to do on a
twitter poll even though you have no
context for what i'm asking well this
video's poll i asked miles toby andrew
tum or
miles tom toby andrew and 66.7 percent
of you which is like six people in this
case chose the second option so now get
ready buckle down for a little
spider-man edit that goes through them
in the order from the pole with scenes
interpolated to double the frame rate
for more fluid fluidity
ugh
ugh
pizza time wow
amazing there are there are no words
there are no words if you want to
participate in the next videos no
context poll make sure to follow me over
on twitter and turn on notifications for
my tweets because i don't tweet super
often and the poll might get buried in
the rest of your feed if you don't now
let me take a second to thank this video
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