How to do Slow Motion in Resolve 17!

oh yes hello my name is casey ferris i make videos on davinci resolve here on youtube today we're talking about slow motion slow motion i don't know why i did that i probably could have just speed ramped my voice but whatever so we'll learn how to make it nice and smooth like this and even speed rampy like this see that's what i'm talking about that's cool that's music video status let's get rid of all this extra stuff all right first things first what is slow motion well i mean obviously it's something moving slower than it does in real life but a lot of the time when you think about slow motion you think about taking a normal piece of video and then just slowing it down and then you think it's going to look amazing like a movie right well this particular clip and basically any clip that looks good in slow motion was shot a certain way so that it looks good in slow motion it's shot with a higher frame rate than you would normally play back video with so this is shot at 240 frames a second which is 10 times faster than 24 frames a second which you use for like film and then what we're doing is playing back each frame at the normal speed that we'd normally play things back at so what that means is it turns into slow motion because think about it if you had a 240 frame video that you shot at 240 frames a second that's one second of time then you bring it into the timeline and you play it back at 24 frames a second that ends up being 10 seconds long so let's make this 10 seconds long so right here this is one second of real time crazy huh so i'll make a copy here so in normal time it would look like this right one second of video turns into 10 seconds of slow motion the reason i'm beating this into the ground is if you shoot something at normal speed and you try and slow it down here's what's going to happen i'll just take this footage and slow it down even more you see how it gets stuttery like this that's because what it's doing is letting each frame take twice as long which our eyes are not used to this is playing back at 12 frames a second basically which would be okay for something like animation but in real life it looks real weird the good news is there's ways to kind of work around this a little bit but let's start with some basics because i just straight up blue past all of that first things first the footage that was shot here in our media pool if i right click this and go to clip attributes here at the very top of this first tab in the clip attributes we have video frame rate and this was shot at 240 and normally it would come in something like that again we play this back and it's really hard to play back at 240 frames a second and if we drag that down into our timeline what that'll do is play this back in real time because it was shot at 240 frames a second it's putting 240 frames into each second of video and for every frame on this timeline it's just finding the nearest frame so at 13 frames it's looking at this piece of footage and saying what's the closest frame out of 240 frames to right here in time and then it's displaying that the next frame it's doing the same thing it's really throwing away a ton of frames when you put something that's a higher frame rate into the timeline like this so if you did shoot this at a higher frame rate and you want it in slow motion the best thing to do is right click here in the media pool go to clip attributes and set your frame rate to whatever your timeline frame rate is which for us is 24 and i'll hit ok and now when we drag this in that's going to play back this buttery smooth slow motion because the frames are all just kind of stretched out and each frame in the timeline is exactly a frame in this footage that's why it looks nice why it plays back beautifully so that's the very best way to do slow motion is shoot it at a high frame rate and then set your footage to play back at your timeline frame rate then it comes in slow motion let's say we shoot this at normal speed and we want it to be slowed down well the way that you slow something down i'll just cut a little piece of this here is in the timeline if you select whatever clip you want to slow down and hit control r that'll bring up your retime controls you can also right-click on any clip and click retime controls and that'll bring that up and what this lets you do is change the speed of the clip right here in the timeline so down here where this says 100 you can click this drop down and change speed to something like 50 and it will make this twice as long and it will play this back half as fast so right now we have kind of this stuttery look which is what you'll run into if you're actually slowing down footage less than 24 frames a second you can also speed things up change speed to let's say 200 that'll play something back faster of course this is already slow motion so it's still slower than normal but it's faster than how it came in another cool thing with the speed change controls is wherever you're at in the timeline you can set your playhead to let's say right before this drumstick hits and if you open this little drop down you do something called add speed point so i can click on that and what that does is kind of just say hey this frame is going to be right here and then before and after it you can play whatever speed you want but this is where this frame lives so we can do something like speed up the beginning of this and then have it play slow motion after so i'll just take this drop down and we'll say change speed to 800 percent and that'll speed that up and then look what happens goes really fast and then slows down and we can do even more speed points like let's say we want to speed it up like right here again add speed point and then we want it to be fast fast fast fast fast until he hits that drum again we'll add another speed point here and then in between these two we'll make this really fast change speed to 800 and so now what it's doing is playing this really fast playing at normal speed playing it fast playing normal speed which ends up being a really cool effect kind of ramps that footage very very cool so you have a lot of freedom if you bring in some high frame rate footage you can get some really nice looking results here and then when you're done doing your speed ramp stuff you can just click this close button for speed change right here and that'll take away all those controls the other thing you can do when you have your retime controls up is just grab the edge of the clip when it turns into that double arrow and you can stretch it back and forth to speed it up or slow it down this is great if you want this to be a specific length i do this a lot with b-roll something that's like it's just not long enough to fit into a certain edit you know i'll just stretch it out to be like just a little bit longer and most of the time you wouldn't really notice it that's a great little fix though isn't necessarily about slow motion but you can kind of like stretch a clip if you need to okay so let's talk about what if we do need to make something slower than how we shot it but we don't want this to be so jerky when our retime options come in so let's select this this is at 50 i'll just close speed change for now and over here in the inspector at the very bottom it says retime and scaling we double click that we have a couple different options here the first two have to do with doing our slow motion this re-time process there's a few different options here nearest frame blend and optical flow what nearest will do is for whatever frame we're on it's just going to find the nearest frame so every two frames because we're slowing this down fifty percent it's only gonna move every two frames so the closest frame is this one at thirty oh five at thirty o six it's the same one that's the closest one and then the next frame it's gonna move it same move it same move it same move it same that's what nearest is and that's generally your project settings by default but if we switch this to frame blend that will do a little bit of a different thing what it will do is any frame that's in between two real frames it's just going to kind of try and blend the two frames that are around it together which sometimes looks great and sometimes looks really weird in this case it might look okay because we have a lot of kind of like water spray and stuff like that and it definitely probably looks a little better than having that kind of jerky look but with especially these kind of like raindrops you get them kind of turning off and on kind of flickering because what it's really doing is taking a normal frame like this one and then it's blending it fifty percent with this frame and fifty percent with the next frame which if you have fast motion there's two raindrops here this one and this one mixed together this is kind of a quick and dirty way to get a little bit better motion without it just killing your computer like this way is okay like it's decent but the dopeness other than shooting it right the dopeness is optical flow so if we click on optical flow here for retime process with this clip selected what this will do is it will look at all of the pixels in each frame and it will figure out what each little thing is moving to so let's go in here and if we go through our footage here what it's doing is it's looking at each little point here and it's trying to estimate what would each frame in between these frames look like and it doesn't do it perfectly but it's a little nicer than just blending them together it actually does a little bit of big brain thinking on this big brain thinking so now if we play this back we get a little bit nicer motion it's a little bit smoother and it looks a little bit better than just frame blending now if we want this even nicer we can go down here to where it says motion estimation and i think by default it's at standard faster and so the farther we go down here the nicer this motion will look so if we go to standard better that's going to do a better job at estimating that motion it's going to look a little bit nicer a little more realistic but it's going to be harder on your computer and that pretty much works for all the way down here so enhanced better again will generally look a little bit nicer but takes more computer power and then if you want to probably just about kill your computer you can go to speed warp and speed warp does a really good job but like take some computer power there but you can do something like this and then right click and say render cache color output something like that and it will sort of pre-render this so that you can play it back without your computer dying just make this a little bit shorter so we don't have to wait so long and of course depending on your system this might not be as big of a deal my system's getting getting up there it's it's like shadow from incredible journey status so now we have pretty nice looking slow motion and again this is twice as slow as it was shot even though it was shot slow but the difference here is this is without optical flow really jerky like this and this is with optical flow so it looks a lot smoother so play around with that retime process that motion estimation shoot your footage in high frame rate if you can if not you can use those kind of tricks control r to bring up your retime controls add speed points change the speed in each section to get some really cool effects so there you go that's a big old rundown on slow motion and resolve oh baby look at this guy he's very excited subscribe to the channel why haven't you done it all right i'm gonna i'm i'll see you guys

Channel: Casey Faris

Views: 37,667

Keywords: Slow Motion in Resolve 17, how to, davinci resolve 17, tutorial, slow mo, video, editing, blackmagic design, davinci resolve 17 tutorial for beginners, davinci resolve, davinci resolve effects tutorial, how to speed ramp in davinci resolve, speed ramping, davinci resolve tutorial effects, davinci resolve 17 effects

Id: 3Ph2Z3josSQ

Length: 11min 53sec (713 seconds)

Published: Sat Jul 24 2021