clipped from photojojo.comTime Lapse 101: An Overview
Alright, so it's not time-travel. All time-lapse photography is, really, is shooting a bunch of photos of the same thing, spread out over a period of time, and smushing them together into one video that plays back in a shorter amount of time. In the words of our pal Genie, "Phenomenal cosmic powers… Itty-bitty living space!" Yeah, time-lapse is kinda like that.
Time-lapse lets you see the natural progression of time, while not having to wait through the actual length of it… so you could watch the sunset (at least, yesterday's sunset) as you always wanted to, without staying up late to do so – and you could fit it all within a nice, brief commercial break in-between episodes of "Dr. Who" too.
Now, there's a few basic steps to take in creating a time-lapse film:
- Choose your subject.
- Figure everything out.
- Shoot your still photographs.
- Edit your photos in Photoshop (Optional).
- Assemble all your photos together into a video.
- Edit your video – add titles, music, and all that jazz.
We know that you're a very clever sod and probably have some brilliant ideas already in mind for what to shoot in time-lapse form. But just in case, here are a few suggestions to get you thinking:
- Fruit rotting/ice melting
- Grass growing
- A cross-country drive from LA to NY in 5 days
- Sunrises or sunsets
- A busy city street over a day's time
- Opening of flower buds (basically any form of nature)
- A baby growing in mommy's tummy (throughout the whole pregnancy)
- A construction site
- The desert sky (stars!), or other natural landscapes
- A self-portrait as you age over a number of years
- Life cycle of a tree over a year's period
- Snail races
- Cookies baking in the oven
Ask yourself how much time you have to commit – the four hours it takes for a snail to get across the back porch might be a lot more do-able than the four months it takes a construction site to be finished.
Based on what you're shooting, you'll want to know how long your actual event or subject will last (or at least, how long you're willing to shoot for), whether you want your final movie to be blocky or smooth, how long you want your final movie to be, and based on all of that, how often (at what interval) you'll want to take photos of the event.
The Length of the Event
Usually the length of the project changes how you're going to shoot it. For longer-term projects, like this nifty time-lapse that documented a soon-to-be-mom's growing tummy throughout the nine months of her pregnancy, you might only need to get a new shot every day or so – you could do that with a point-and-shoot, and not need any fancy automated equipment.
Ask yourself how long you can go between photos while still documenting the action of the event; for change that is pretty big and radical over a shorter amount of time, you'll want to shoot it more often. For change that is gradual and slow over a longer time, you can have more lengthy intervals between shots.
How the Final Movie Appears
Your final movie can end up two ways: blocky or smooth and seamless. With blocky, shots will seem to abruptly change into the next – in a crowded street scene, for example, a person might appear in one part of the screen and then, blip!, suddenly be halfway across the screen in the next frame.
The alternative is blending the interval shots together, so that it appears smooth and seamless. Usually you do this two ways: drag your shutter speed when you're shooting, and shoot your subject more often (at shorter intervals).
Which is better? It's up to you! For events or time-lapse subjects where the change is gradual and slow (like a construction site), blocky might be fine. Where change occurs much faster (like a blossoming plant), smooth and seamless would probably be better.
The Magic Formula
Most movies show around 20-30 frames per second; the more frames per second, generally the smoother the movie will play back (though of course, this depends on other things too). If we're going to make E.T.'s flower come back to life, we'll want it to be shown at around 24 fps and be smooth and seamless.
We also need to ask how long we want the final movie to be. We're thinking E.T.'s flower coming back to life to should last around 30 seconds… so, some quick math to find out how many frames we need to capture:
Awesome. Now to find out how often (at what interval) we need to shoot frames of a flower decaying (we'll play the final movie in reverse to make it look like it's coming back alive). First we estimate how long the actual event lasts – about 4 hours (or 14,400 seconds), we think. Some more quick math:
So we have our plan, Stan! When you start your time-lapse project, we'd really recommend thinking ahead like this.
It really doesn't matter what you shoot your time-lapse photos with, as long as you shoot them – we've seen people use SLRs, point-and-shoot cameras, and webcams.
Whatever you use, we recommend you mount your camera on a tripod (unless you have Super-Man endurance and don't mind standing there holding it for eight hours or however long). If you don't have a tripod, wedge your camera between a couple books, or make a custom base for it.
Shooting with an SLR: Intervalometers
With an intervalometer (or timer remote controller), you can program your camera to shoot at certain times and at certain intervals – such as 1 frame every 5 seconds, 1 frame every minute, and so on. This leaves you free to go do something else, when you're ready.
Now set up the rest of your camera:
- Set your camera to record JPG, to save on space. (Each photo is only on screen a small time anyway.)
- Set your camera's white balance to manual – auto-white balance can change and fluctuate, especially if you'll be shooting something for a while and the light gets brighter or dimmer over time. Setting it to manual helps ensure all your photos keep reasonably the same look.
- Set your camera's exposure manually – for most of the same reasons, you'll want to take your camera's exposure off automatic as well.
The idea is that your camera's settings should change as little as possible while it's doing its thing.
Now, remember back when you decided between Blocky or Smooth? If you're after the smooth and seamless look in your final movie, you'll want to adjust your exposure (how long the shutter stays open to capture light while taking a photo) to be as long as possible. When you force your shutter to stay open a longer time (often called "dragging your shutter"), moving objects, like cars and people, will then appear more as a blur, and will "smear" across your scene. Your final move will have much smoother action this way.
The side-effect of long exposures is a lot more light coming at your camera – often too much light. If you're going to drag your shutter, we'd suggest getting a neutral density filter to help wrangle the extra light under control.
If you're going the SLR route, we'd also suggest taking a look at Zach Wise's awesome video tutorial on shooting time-lapse with an SLR. It's a great primer to begin with.
Shooting with a Point-and-Shoot: Time-Settings
For some time-lapse ideas, that might work just fine – especially time-lapse videos where you only need one or two shots a day. A time-lapse of a baby growing in mom's tummy over the course of nine months, for example, would be great to shoot manually with a point-and-shoot.
There are also some extra add-on timer devices, like the Pclix, that will cause your camera to trigger at specified intervals – but they don't work with all point-and-shooters, so the chances might be slim of getting one that works for you. You could also hack your camera and wire it up to a home-made intervalometer… but, uh, do that at your own risk. And probably not with a brand-new camera.
Shooting with a Web-Cam: Time-lapse Software
For Mac, there's the unbelievably cool freeware program Gawker. It immediately recognizes any iSight or web-cam hooked up to your computer – or even better, on any computer on your network – and after specifying an interval for it to take new shots at, gives you one-button time-lapse recording from that iSight. Even better, you can also combine views from multiple iSights or web-cams into a single, split-screen time-lapse video – or you could even use your computer desktop and what you're doing on it as a source for your time-lapse.
For PCs, Webcam Timershot – part of Microsoft's PowerToys package of free add-on software – does much the same as Gawker (minus the split-screen ability and having the option to record your desktop): specify an interval, and Webcam Timershot will take pictures from your web-cam and save them to a location you choose.
Last Minute Checklist
Ready too go? Good. But wait, a few last minute things:
- Make sure the batteries are all charged up with enough juice.
- Does your memory card have enough room? (If not, select a lower jpg setting – or run out and buy a new card!)
- Try not to walk off, leaving your camera abandoned. Many a noble camera lost its life to thievery while on a time-lapse mission.
Step #4: Edit your Photos
It isn't necessary every time, but sometimes you'll have a batch of photos that need just a little tweaking before anything else. Maybe the exposure or levels could use some nudging, or you want to adjust the saturation a bit. Great. One quick tip: Automate Everything.
In Photoshop, practice on one photo from the bunch, adjusting it to how you like it – then create an Action in Photoshop to do exactly what you just did. Close your photo without saving, then use Photoshop's Automate Batch command. Select the folder of all your photos – your source – and create a new folder for where the edited photos are gonna go – the destination. Then select your newly created Action, and Ok – off they go.
You'll end up with your batch of photos, all edited, in your new folder… lookin' good and primed to be put together!
Step #5: Start Making Your Movie
Use Quicktime Pro to Assemble Your Photos Into a Movie
Underneath the File window of Quicktime, select "Open Image Sequence", then navigate to the folder with your photos and select the first one. Hit okay, and then QuickTime will ask you how many frames-per-second you want your movie to have. QuickTime will do all the rest for you.
From here, you can export it for the web or save it so that you can add titles, music, and other effects to it in a movie editing program.
Or: Assemble Your Movie with iMovie or Another Application
The photos will be added to your movie's timeline and you'll have the beginnings of a swanky time-lapse video.
(If you're using another application besides iMovie or Quicktime Pro, the process will likely be about the same – either opening an image sequence, or manually adding your photos in order and adjusting their duration.)
Step #6: Add titles, music, and effects
Add some music and titles, and you're ready to show off your final movie!
You might also want to try some effects, like panning and zooming over your finished time-lapse movie, to add motion and hone in on what's interesting.
