[0:01] hey everyone today i wanted to show you
[0:02] a pretty cool tool i found that uses ai
[0:05] to generate frames between your frames
[0:06] essentially making it so that you can
[0:08] feed in a 30 fps video and get a 60fps
[0:11] version out of it and arguably best of
[0:13] all it's free and it's called flow
[0:14] frames
[0:15] when it comes to interpolating frames
[0:17] which is just the act of having a frame
[0:18] a and b and then creating a new frame in
[0:20] between those two there's already a
[0:22] couple ways we can go about doing that
[0:23] without flow frames but in my opinion
[0:25] they're just not as good after effects
[0:26] is a built-in feature called optical
[0:28] flow that you might have used before and
[0:29] there's also one that you've likely
[0:30] heard especially if you're hitting up
[0:32] some sick call of duty montages back in
[0:34] the day and that one's called twixtor
[0:35] which is a paid plugin so real quick
[0:37] i'll set up a comparison between optical
[0:39] flow twixtor and flow frames where i
[0:41] take this clip from into the spider
[0:43] verse and slow it down to 50 speed in
[0:45] each case these tools are going to be
[0:46] interpolating the frames to make the
[0:48] slow motion look smoother to use optical
[0:50] flow to slow down our clip all we need
[0:52] to do is drag it into a comp make sure
[0:53] the composition is at least two times
[0:55] longer than the clip itself then right
[0:57] click the clip go to time time stretch
[0:59] and then stretch it to 200 percent now
[1:01] doing that alone is going to stretch the
[1:03] clip to twice as long but if i step
[1:04] through frame by frame you can see that
[1:06] it isn't interpolating frames we get a
[1:08] real frame then a paused frame that a
[1:09] real frame that a pause frame and so on
[1:11] to actually use optical flow to
[1:13] interpolate the frames creating a new
[1:14] frame in between the real ones we just
[1:16] need to hit this frame blend switch
[1:17] twice once changes it to standard frame
[1:20] blending which is just essentially
[1:21] putting the next frame over the current
[1:23] frame and setting the opacity to 50 but
[1:25] hitting the frame blend switch that
[1:26] second time switches it to the optical
[1:28] flow frame blending where after effects
[1:29] is actually trying to interpolate
[1:31] between your frames to create a new
[1:32] frame now with that all rendered out you
[1:34] can see that optical flow is mostly
[1:36] garbage but if things are already moving
[1:38] very slow it does a pretty good job like
[1:40] in these two shots
[1:41] and here's a comparison between no
[1:42] interpolating at all on top and using
[1:44] optical flow below so there definitely
[1:47] is a time and place where using it can
[1:48] work for you just most of the time it's
[1:50] not going to be a good option next let's
[1:52] take a look at twixtor again here we're
[1:54] going to import our clip into our comp
[1:55] making sure the comp size is at least
[1:57] two times longer than the footage but
[1:59] instead of time stretching the clip
[2:00] we're gonna have to nest our comp so
[2:02] dragging the composition into the new
[2:03] comp button we've got that sorted now on
[2:05] this new nested comp i'll apply the
[2:07] twixtor effect i'll enable gpu and i'll
[2:09] set the speed to 50
[2:10] now rendering this out you can see that
[2:12] twixtor definitely does a better job
[2:14] than optical flow when it comes to the
[2:15] faster moving parts if i put optical
[2:17] flow up top and two extra on the bottom
[2:19] you can see that it's pretty clear who
[2:20] the winner is now let me show you the
[2:22] main event the show stopper the one the
[2:25] okay enough i'm simply gonna drag the
[2:26] clip onto flow frames making sure it's
[2:28] set to two times interpolation and hit
[2:30] interpolate it does its thing and then
[2:32] we've got our video with double the
[2:33] frames now just to be clear what we get
[2:35] out of flow frames isn't slow motion
[2:37] this clip is the same speed as it was
[2:39] going in but it has double the frames
[2:40] because flow frames interpolated a frame
[2:42] in between every real frame making it
[2:44] look a lot smoother that was a lot of
[2:45] frames in the same sentence so when we
[2:47] import this into after effects and we
[2:48] make a new comp we need to go into the
[2:50] comp settings and make sure the frame
[2:51] rate is set to the same frame rate as
[2:53] the original clip in other words half of
[2:55] what our new interpolated clips frame
[2:57] rate is then again making sure the
[2:58] comp's length is at least twice as long
[3:00] as our clips we hit ok then we'll just
[3:03] right click our clip go to time time
[3:04] stretch and stretch it to 200 and we're
[3:07] done this is our flow frames
[3:08] interpolated slow motion i'll show you a
[3:10] comparison with twixtor in a second but
[3:12] flow frames is handling the
[3:13] interpolation of faster movement so much
[3:15] better here we've got twixtor up top and
[3:17] flow frames on the bottom if i step
[3:18] through frame by frame to show you how
[3:20] they both deal with faster movement here
[3:21] we can see we're on our real frame and
[3:23] then next we've got an interpolated
[3:24] frame with twixtor we've got some heavy
[3:26] ghosting and even some of the frame
[3:27] being pulled down up top here and none
[3:29] of that with the flow frames version if
[3:30] i go forward a little bit more oh boy
[3:32] lots of ghosting and the edges of the
[3:34] screen being warped inwards on both the
[3:35] top and bottom of the twixtor version so
[3:38] you get the point now i'm sure optical
[3:39] flow is decent if your footage is moving
[3:41] very slow already twixtor is much better
[3:43] at handling the faster moving
[3:45] interpolations but flow frames takes the
[3:47] cake in both fast and slow moving
[3:48] scenarios it's also just a really great
[3:50] way to quickly and easily take any media
[3:52] you have and double its frame rate so
[3:54] that it looks a lot smoother you can do
[3:56] it with anime video games movies renders
[3:58] it won't work flawlessly with every
[4:00] render but you could save yourself a lot
[4:01] of time if you just export your stuff at
[4:03] half the frame rate and then use flow
[4:05] frames to double it back up to where it
[4:06] needs to be because sometimes you're
[4:08] looking at like 10 minutes of frame on
[4:09] more complicated scenes so if you've got
[4:11] a render where things aren't moving
[4:12] super fast flow frames might be a good
[4:14] option for you in terms of saving a
[4:16] bunch of time as a bit of a trickier
[4:18] example here i've got a render for a new
[4:20] version of my intro that i'm working on
[4:21] i rendered it at 30fps because that's
[4:23] what all my videos are rendered at
[4:25] except for this one but if i re-render
[4:27] the intro at 15 fps here's what we've
[4:29] got there's a lot of fast movement at
[4:30] the beginning especially so i feel like
[4:32] flow frames won't absolutely nail it but
[4:34] if we chuck it in there and ask it to
[4:36] double the frames back up to 30 fps
[4:38] here's what it spits out now like i said
[4:40] at the beginning there seems to be a bit
[4:41] of artifacting but other than that it
[4:43] pretty much nails it a good workflow i
[4:44] can imagine doing is rendering my stuff
[4:46] out at 15 fps running it through flow
[4:48] frames to bring it up to 30 and then any
[4:50] area where i see flow frames having
[4:52] trouble i can just re-render that
[4:53] section in blender at 30fps and comp it
[4:56] back over top to cover up any issues
[4:58] that way i'm pretty much getting away
[4:59] with rendering at 15fps and only having
[5:01] to re-render at a full 30fps for the
[5:03] sections that flow frames can't
[5:05] interpolate smoothly which in the end
[5:06] will save me a ton of time now as far as
[5:08] where to get it i'll leave a link in the
[5:09] description it's absolutely free to
[5:11] download and you can choose to support
[5:12] the creator on patreon in order to get
[5:14] access to early updates after you
[5:16] download and install it you pretty much
[5:17] just need to drag a video file onto the
[5:19] program and it'll sort out most of the
[5:21] settings for you all you really need to
[5:22] worry about is how much to interpolate
[5:24] by the output mode and two settings
[5:25] called detuplication and scene changes
[5:28] setting the interpolation amount is
[5:29] pretty self-explanatory it shows you the
[5:31] fps of the video on the left and on the
[5:33] right it shows you what the output fps
[5:34] will be then you just choose the
[5:36] multiplier the output mode is also
[5:38] pretty obvious if you can work after
[5:39] effects i have confidence in your
[5:41] ability to sherlock homes what this
[5:42] could possibly mean and the last two
[5:44] settings of note are deduplication and
[5:46] scene changes deduplication is for if
[5:49] you have footage that's 60fps for
[5:50] example but if you step through it frame
[5:52] by frame you actually see that every
[5:54] other frame is a paused frame that would
[5:56] mean your footage is actually 30fps but
[5:58] it's just been rendered out at 60fps for
[6:00] no reason deduplication basically just
[6:02] tries to remove those paused frames
[6:04] before interpolating which will lead to
[6:05] a much smoother output lastly the
[6:07] setting for scene changes just exists to
[6:09] try and detect
[6:10] scene changes that way it won't try and
[6:13] interpolate a frame in between two
[6:14] scenes if i turn the setting off and
[6:16] then run the spider-verse clip through
[6:17] again you can see that between these two
[6:19] scenes we get a mushy morphed frame
[6:21] which you probably don't want so i'd
[6:23] leave that setting on and that's pretty
[6:24] much all i had to say about flow frames
[6:26] if you're into programs like this that
[6:28] you can toy around with and help with
[6:29] your editing i made a similar one on a
[6:31] program called ebsynth that i recommend
[6:33] you check out it's one of the most
[6:34] viewed videos on the channel so i guess
[6:36] people like it now that we're done with
[6:38] the tutorial let's get to the part
[6:39] you've all been waiting for the no
[6:41] contacts poll you know the part where i
[6:43] do whatever you guys tell me to do on a
[6:44] twitter poll even though you have no
[6:45] context for what i'm asking well this
[6:47] video's poll i asked miles toby andrew
[6:49] tum or
[6:51] miles tom toby andrew and 66.7 percent
[6:54] of you which is like six people in this
[6:56] case chose the second option so now get
[6:59] ready buckle down for a little
[7:00] spider-man edit that goes through them
[7:02] in the order from the pole with scenes
[7:04] interpolated to double the frame rate
[7:06] for more fluid fluidity
[7:17] ugh
[7:35] ugh
[7:57] pizza time wow
[7:59] amazing there are there are no words
[8:01] there are no words if you want to
[8:03] participate in the next videos no
[8:04] context poll make sure to follow me over
[8:06] on twitter and turn on notifications for
[8:08] my tweets because i don't tweet super
[8:10] often and the poll might get buried in
[8:11] the rest of your feed if you don't now
[8:13] let me take a second to thank this video
[8:15] sponsor skillshare if you weren't aware
[8:17] skillshare is an online learning
[8:18] community with thousands of classes for
[8:20] creators they've got a ton of topics you
[8:22] can explore but the ones that i'm
[8:23] personally drawn to were film and video
[8:25] of course productivity and creative
[8:27] writing a class that i watched recently
[8:28] that i think you might enjoy is intro to
[8:30] virtual filmmaking in unreal engine by
[8:32] cinematic captures he goes over how to
[8:34] set up a virtual camera rig in unreal
[8:36] finding assets lighting rendering and
[8:38] more virtual filmmaking has always been
[8:40] super interesting to me so i'm glad i
[8:42] got to learn a little bit more about it
[8:43] if any of that sounds good to you then
[8:45] give his course on skillshare a go
[8:46] skillshare is curated specifically for
[8:48] learning so you don't have to worry
[8:49] about ads and they're constantly
[8:51] launching a new premium classes for
[8:52] members so you can stay focused and
[8:54] follow where your creativity takes you
[8:56] if you're interested in joining the
[8:57] first thousand of my subscribers to
[8:58] click the link in the description we'll
[9:00] get a one month free trial of skillshare
[9:01] so you can start exploring your
[9:03] creativity today thanks skillshare