How to Record Great Video with Your HD DSLR Camera
You’ll primarily find two types of imaging sensors in digital cameras: CCD and CMOS. Each have their advantages and disadvantages, but for our purposes we’re just going to take a look at how each exposes an image. CCD sensors use what’s called a global shutter, whereas CMOS sensors use a rolling shutter. (Although technically a CMOS camera could implement a global shutter, it has yet to make it into any common CMOS-based cameras.)
The difference between the two is pretty straightforward: global shutters expose the entire image simultaneously, and rolling shutters, well, don’t. A rolling shutter tells parts of the sensor to become light-sensitive at different points in time, so you don’t get the full image instantly. Think of it like loading an image on a dial-up modem. This all happens fairly fast so it’s not always noticeable to the eye, but when the image changes drastically the ’jello effect’ shows up as a result of the rolling shutter. Here’s an example from the Canon 7D:
How to Record Great Video with Your HD DSLR Camera
As you can see, quick panning causes the frame to wobble due to the rolling shutter. So what do you do about it? There are a few options, and the easiest is simply being mindful of how you’re operating the camera. If you avoid quick motion and use a lens with image stabilization (when possible), the rolling shutter will be mostly imperceptible.
If you don’t have a lens with image stabilization you can always use an external stabilizer. These are generally pretty expensive if you’re purchasing one pre-made, but we’ve posted many different DIY camera stabilizer options.
More aggressive rolling shutter fixes come in the form of plug-ins for editing and effects software, such as The Foundry’s RollingShutter, but it’s also possible to do the work yourself:
How to Record Great Video with Your HD DSLR Camera Recording Sound
How to Record Great Video with Your HD DSLR Camera
No matter how your DSLR handles sound recording, it’s always going to be an issue at some level. Some cameras only have an internal mic and others have limited inputs and manual controls, leaving you with few options to capture truly great sound. In the case of the 5D2, you can install a third-party firmware called Magic Lantern to give you further controls, but if you want total control over your audio you’re going to want to look at dual-system sound.




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The growth in computer use and computer hardware capabilities has placed demands of increasing magnitude and complexity on computer software. Software development processes, along with attendant methodologies, which may have worked well in the past, often break down when applied to the development of today’s software. For example, studies show that every five years the sizes of software projects, as measured by Source Lines Of Code (SLOC), increase by an order of magnitude, and that the scaling of the development effort, demanded by the order-of-magnitude increases now require fundamental changes in the development process. As the sizes of software projects have increased, software development processes based on individual programmers have given way to processes based on small teams and, in turn, small teams have given way to larger teams and so on. Higher scaling of software development processes by merely increasing team sizes reaches limits on effective project management and resource availability.
Today’s users of software demand software applications of greater size and complexity than before. Advances in computer hardware capabilities are more than adequate to match the demands of users; however, software as it is developed using prevailing processes and methodologies is not. The challenge is finding software development processes with attendant methodologies and technologies that meet user demands and that improve software quality and productivity.




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As a technical writer who has experienced the rise and fall of software companies from the trenches, I have nothing but praise for the work of the Microsoft Corporation (’Mr. Software,’ by Fred Moody, Aug. 25). It produces innovative, relatively bug-free products for a reasonable price. I’m using one of them now to write this letter. As for Bill Gates and all the sour grapes about his billions -- compared with the likes of Michael Milken, he’s some kind of American hero. Just think, you can still get wealthy in America by making something!
Software By Hewlett The Hewlett-Packard Company said today that it was adapting the proprietary operating system software of its HP 3000 business computer to be more compatible with ’open systems’ based on the industry standard operating system, Unix. As part of the plan, Hewlett has changed the name of the software from MPE/XL to MPEiX to reflect its compatibility with Posix, a standard for operating system interfaces. As the first step in adopting Posix, Hewlett will offer a kit that lets software developers rewrite Unix-based programs to run on the HP 3000.







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We all have those special moments in life that we want to remember forever, but the truth is that memories are often better preserved on video so that we may recall the particulars of any given event. This is why camcorders are such an important part of every special occasion and have been for many years. As time has progressed, the construction of camcorders has changed greatly. What was once a large and bulky piece of equipment later went to a compact VHS-compatible system, which has now transformed into the sleek and lightweight design of today’s digital camcorders.
During your next electronics shopping trip, take a moment to explore the features found on modern digital camcorders. Whether your shopping consists of a local electronic store or a virtual shop, take a look at a handful of reasons to consider choosing a digital camcorder:
$Digital camcorders have the ability to record audio and video, but also are capable of capturing still life images just as a digital camera would. Not only can you film all of those once-in-a-lifetime moments, but you can also snap a few still images of knick knacks and list them for sale on eBay.
$Digital camcorders offer a much greater audio and video quality when compared to the older models, which recorded video in analog format and often resulted in a grainy texture.
$One of the most important features of a digital camcorder is the fact that they can be connected to either a television or a computer. Previous camcorders were compatible with VHS only, which was effective, but technology now requires that compatibility be geared toward additional equipment.
$Because they are compatible with computers, digital camcorders are widely used by amateur film gurus and/or anyone who wants to enjoy the convenience of being able to easily edit and enhance their videos through the use of specialty computer software.
$Digital camcorders are compact and lightweight, which makes them ideal for travel. In addition, they are easy to manage during recording.
As is the case with any major purchase, cost is often a leading factor in the decision of which product to choose. When it comes to digital camcorders, the price will be determined by the built-in features and capabilities of the unit. A basic digital camcorder can be purchased for several hundred dollars and the price will rise according to the aforementioned factors.
With the purchase of any new electronic equipment, the manufacturer will offer a warranty. Always be sure to retain the original sales receipt, packaging and warranty information relating to your digital camcorder incase there is a problem that needs repair anytime during the coverage period.



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