3 Tips for Dealing With Rolling Shutter

first_imgThe term “Fix It In Post” has become a cliche at this point, but when it comes to rolling shutter, sometimes it actually is the best option. Depending on the severity of the rolling shutter artifacts, you may be able to fix the image during post-production by using any number of different plug ins for various NLE systems or compositing software. There are dozens of options out there, so I would recommend doing a quick google search to see which tools work best for your camera and software combination. Here’s a video tutorial from TheHowToMac  that demonstrates how to reduce rolling shutter in Final Cut Pro X. With all of that said, I would never rely on fixing your rolling shutter in post. The best results will always be achieved by avoiding rolling shutter artifacts in the first place. But if you are in a sticky situation, it’s great to know that there are some editing tools that can help you deal with these problem shots. If you’re interested in more info on shutters, rolling or otherwise, check out these articles from the PremiumBeat Blog.FCPX Video Tutorial: How to Fix Rolling ShutterHow to Repair Rolling Shutter in Adobe Premiere ProHow Do Camera Shutters Work?How do you deal with rolling shutter issues? Got any tips for your fellow filmmakers and videographers? Share your thoughts in the comments below. DSLR video has improved dramatically over the last few years, but rolling shutter is still an issue. Deal with it using these three tips.No one likes the look of rolling shutter artifacts. They’re a pesky side effect of shooting on DSLRs (or other cameras using CMOS sensors) and have the potential to ruin otherwise fantastic footage. Rolling shutter issues can plague footage in any number of ways, but most often by causing a horizontal skew when whip panning, or the “jello effect” when shooting on long lenses (or handheld). Here’s an example of the jello effect:Rolling shutter skew is simply a result of the speed at which a frame is scanned and captured on a CMOS sensor. Unlike global shutters, which capture an entire frame all at once, a rolling shutter will scan the frame from top to bottom, leaving room for visual artifacting in the frame.In other words, the top and bottom points of any given frame are not captured at the exact same moment, which is why images can appear skewed under certain circumstances.This can be seen in the image below.Image from EngadgetYou might wonder why more manufacturers don’t use global shutter sensors on their cameras, and there are a number of reasons for this. In a nutshell, there is usually a tradeoff in terms of performance between rolling and global shutters. A rolling shutter has issues with skew and distortion (as touched on above), but can have better low light performance and dynamic range.On the other hand, the global shutter may never be able to achieve the same DR as its rolling shutter counterpart, but it would perform much better for handheld work, action scenes, and visual effects work.Image from DSLR Video CollegeVFX shots in particular can be very challenging to deal with when working with footage suffering from rolling shutter artifacts. For a VFX artist to do their work best, they need to be able to accurately track footage and match 2D/3D elements to the source footage – which can be a huge challenge when the source material isn’t stable enough.But even if you aren’t doing VFX work or shooting action sequences, you still need to be careful when shooting on a camera that is prone to rolling shutter problems. A handheld shot using a long lens can turn into complete jello under the wrong conditions, and the skew associated with any number of shooting situations can be a huge distraction in the editing room.The good news is that there are ways to offset the rolling shutter issues associated with many CMOS sensors. Here are three of the simplest ways to work around it:Use a RigImage from 2355 ProductionsThis first point applies most specifically to micro-jitters, which can be an issue with nearly any camera, but can be exaggerated by rolling shutter.Using any sort of stabilizer or rig will always be your best bet when it comes to minimizing micro-jitters. Obviously a tripod or monopod can work perfectly in most instances, but for handheld work things get a bit trickier. As you might imagine, using a shoulder rig is one of the best ways to eliminate rolling shutter (or at least reduce it significantly), but it needs to be set up just right.I have used some DSLR rigs that didn’t have enough counter weight or just weren’t built well enough to absorb some of the shock that would cause micro-jitters, and ultimately they weren’t much better than actually holding the camera. Rigs that are heavier but still well balanced are an absolute must for even the most basic handheld work.Alternatively, you might want to consider a small gimbal-based stabilizer like the Movi M5 (pictured above) or a device like the Nebula 4000. Or, if you are unable to use a rig for any reason, the next best thing would be to use a stabilized lens. Any lens with built-in image stabilization will decrease rolling shutter artifacts substantially, but a well-balanced rig is always going to give better results.Know Your AnglesImage from GSI EngineeringSometimes knowing how not to use a tool is just as valuable as knowing how to use it. Every camera has its limitations, whether in the areas of dynamic range, sharpness, detail, color accuracy, or otherwise. If your particular camera struggles with rolling shutter, then sometimes the best option is to work around its limitations and avoid shooting in situations where the camera is going to have issues.One example of this might involve shooting a moving train. If you were to point your camera at a train that is moving horizontally from screen left to screen right, the image would be very skewed, even if you weren’t moving the camera at all. Just like a whip pan, the sensor would be unable to read the entire image at once and would therefore cause a horizontal skew in the image.While you’re on set, the only option you have (other than shooting on a different camera) is to change your angle. Instead of shooting head on, you could opt to shoot from a 3/4 angle or any number of other positions that would help you avoid the skew entirely. It may feel frustrating that your creative choices are limited, but knowing your limitations will always help you get the best results and avoid issues down the road.Fix It in PostImage from the Connecticut School of Broadcastinglast_img read more

iRobot Roomba S9 Plus vs Neato Botvac D7 Connected

first_img Neato Botvac D7 Connected Aug 31 • Alexa can tell you if someone breaks into your house Tyler Lizenby/CNET 6 CNET Smart Home Battling bot vacs: iRobot Roomba S9+ vs Neato Botvac… CNET may get a commission from retail offers. If you want the most robot vacuum for the least amount of money, Neato’s Botvac D7 is the way to go. Thanks to built-in lidar laser mapping, the D7 wins the floor coverage and navigation prize. On our tests it covered more ground and consistently cleaned faster than the Roomba S9 Plus. It also came close to matching the Roomba’s soil pickup performance. Keep in mind, the Roomba removed more pet hair from our test floors than the Neato D7. So if you’re a pet owner, the D7 isn’t your best choice.The Neato D7’s app experience is better than the Roomba S9 Plus’. Its “no-go lines” feature is especially useful. It allows you to custom-edit saved maps, and create virtual sections of your home for the robot to avoid. The Roomba has yet to offer a similar capability.So while the Neato Botvac D7 isn’t the ultimate in robot vacuum performance and features, for the price it offers quite a bit. Now playing: Watch this: See All The iRobot Roomba S9 Plus Comments The Neato Botvac D7 Conn… The best if price is no object • Read the Neato Botvac D7 Connected preview $1,399 at Amazon Best laptops for college students: We’ve got an affordable laptop for every student. Best live TV streaming services: Ditch your cable company but keep the live channels and DVR. The best all-around value 8:07 Easily the most expensive robot vacuum on the market, the $1,399 Roomba S9 Plus is far from budget-friendly. What you get for this tidy sum though are truly next-level features. The standout is its CleanBase dock. It both charges the Roomba’s battery and empties the robot’s dustbin. Inside the dock is a bag that holds enough dirt for about 30 typical cleaning runs. When it’s full, just open the base, remove the bag and discard. That’s way more convenient than the Neato Botvac D7. The D7 comes with a standard center-mounted dustbin. So the Roomba S9 Plus is the clear choice, if you want to spend less time getting your hands dirty.The Roomba S9 Plus does a good job getting around rooms and obstacles as it cleans. Its optical sensor-based navigation system covers less ground than the Neato D7. It also took longer to vacuum the same amount of space. The Roomba creates maps too, and you can label rooms in the iRobot app. You can’t designate off-limit areas, though, like you can with the Neato D7.As far as raw pickup power, the Roomba S9 Plus has a slight edge over the Neato D7. Both are great at removing dirt, but the Roomba does a better job of dealing with pet hair. And while the Roomba S9 Plus is brand-new, the Botvac D7 has been on the market for a few years, and has steadily improved thanks to multiple software upgrades. That makes both robots strong competitors, and tempting choices for your hard-earned cash. Let’s find out how they really stack up, and which one is the better vacuum buy.  We’re here to help you make informed purchase decisions. If you use our links to buy, we may get a commission.Also read: The best robot vacuums of 2019: iRobot Roomba vs. Neato vs. the rest $600 at Amazon The iRobot Roomba S9 Plus Share your voice Preview • Neato’s vacuum steers clear of the spots you tell it to avoid Aug 31 • Best smart light bulbs for 2019 (plus switches, light strips, accessories and more) The $1,399 iRobot Roomba S9 Plus has a sky-high sticker price, but for a robot vacuum cleaner it offers an impressive set of features and capabilities. One in particular, a self-emptying dustbin, is a trick only a few vacuums can match. For half the Roomba’s price though, the $599 Neato Botvac D7 Connected is also an effective robotic floor cleaner. Both machines systematically map and navigate through rooms. They both clean quickly and efficiently too. Both work with Alexa and Google Assistant. You can control and schedule their cleaning sessions for the Roomba and Botvac D7 from your phone as well. Tags See it reading • iRobot Roomba S9 Plus vs. Neato Botvac D7 Connected $600 at Amazon Tyler Lizenby/CNET Smart Home The best all‑around value Best Buy $1,399 at Amazon Mentioned Above Neato Botvac D7 Connected $599 The Neato Botvac D7 Connected The best if price is no object Aug 30 • Battling bot vacs: iRobot Roomba S9+ vs Neato Botvac D7 Connected Read more about the iRobot Roomba S9+ See It CNET Smart Home $599 iRobot Neatolast_img read more

Why Dont Term Limit Proposals Usually Pass

first_imgMartin Jacobsen Share X U.S. Senator Ted Cruz of Texas has introduced a proposed Constitutional amendment to establish term limits for Senators and members of Congress. His proposal would limit Senators to two six-year terms and House members to just three two-year terms.It’s not the first time Cruz has called for term limits. It’s also not the first time any lawmaker has proposed them. But they never go anywhere. Why not?See, there’s an inherent problem: How do you get people in power to voluntarily limit that power? How do you get members of the Senate and House to agree to conditions that might shift the balance of power in those bodies? And amending the Constitution — as would be needed to limit federal officeholders — is especially difficult.In the audio above, Teddy Rave from the University of Houston Law Center explains how term limits have been enacted in the past and some of the legal challenges with doing so.Then, political analyst Nancy Sims discusses the history of term limits in local, state, and national government and why they’ve never been passed for certain positions.center_img To embed this piece of audio in your site, please use this code: 00:00 /00:00 Listenlast_img read more