Friday, May 30, 2014

What kind of video cameras do they use In. Hollywood?

Q. For example in Paul Thomas Anderson movies or Wes Anderson movies? Thanks


Answer
Hi Brady:

I can tell from some of your other Y!A discussions that you are a big film fan. "Movies" (to avoid the nitpicking "film vs. video" distinction) are still pretty much produced on real 35mm film stock (with Panavision and Arri cameras being the most popular -- since that's what the rental houses carry).

Wes Anderson started off in my area (Texas), where he met Owen, Andrew, & Luke Wilson, and shot the short version of "Bottle Rocket" in black-and-white 16mm film. He thought about shooting the feature-length version in Panavision (and made a camera-test of some footage) but opted for regular 35mm film cameras & lenses. He's not known for shooting digital, yet.

P.T. Anderson started out as a kid shooting Betamax home-video & 8mm movie film (saying he found video "easier"). He moved-up to using a Bolex 16mm camera in his late-teens, but shot "The Dirk Diggler Story" (a half-hour story that was the inspiration for "Boogie Nights") on videotape. But none of his major projects are listed as digital cinematography productions.

"Digital cinema" is still somewhere between its "infancy" and "adolescence", as the video technology improves both at the production/post-production ("filming" and editing the shots) and distribution/exhibition (duplicating & projecting the movie) ends of the business. It's just been 12 years since George Lucas announced he would shoot "Star Wars: Episode II" (and the succeeding Episode III of the "prequel" trilogy) in 100% digital. Film is in its 2nd century of existence.

The resolution quality of the cameras, and the development of professional "cine" models like Sony's CineAlta (used for "Star Wars" II & III, with Panavision modifications), the RED One camera, Arri's D-series & Alexa, and Silicon Imaging's SI-2K âamong othersâ has pushed the acceptance of all-digital as a feature-film shooting medium.

And since "3D" cinema is way-easier to distribute & project with video projectors than film models, the current popularity of 3D movies is motivating the theater chains to install state-of-the-art high-brightness video projection systems in almost all their screens. With video being the final source for showing to audiences (both in cinemas and at home), it's easier to convince a studio to "shoot digital".

Before the big shift to video at the projection end, someone wishing to use video cameras always had to plan for "scanning to film", a technology that didn't always produce the best quality (especially in the early days of decent, affordable video cameras).

The other factor that comes into play are the "film craft" unions (IATSE is the largest), who kinda dislike the word "video" since it becomes the jurisdiction of the traditionally Television/Broadcast unions (NABET/CWA). The IATSE members have gone as far as creating job titles like "DIT" (Digital Imaging Technician) instead of Video Engineer, to avoid using the "V"-word.

Planning & lighting for video cameras is still somewhat different from traditional film shooting, so directors like Wes Anderson and Paul Thomas Anderson who "grew up" shooting with film stock tend to stay in their comfort zone.

hope this helps,
--Dennis C.
 

HOW DO SD MEMORY CARDS FOR CAMERAS WORK (LARGE MEMORY)?




blondy2006


JUST CURIOUS ON HOW SD MEMORY CARDS WORK? IS IT THE MORE GB THE MORE IT HOLDS?? LIKE IS 8GB GOING TO HOLD MORE PICTURES THAN A 2GB?? I HAVE A SAMSUNG TL205 PLEASE HELP!!!


Answer
Memory Cards are storage devices that hold images and videos recorded using cameras. They are semiconductor flash devices that use electronic devices (transistors) to store data as series of high and low voltages, digitally referred to as 1 and 0 in binary logic. Memory cards are Random Access devices.

Higher the GB-rating of a memory card, more the number of electronic storage slots it has and therefore higher is its data/image/video storage capacity. A 1 or 0 mentioned above is referred to as a bit (b). 8 bits together form a byte (B). 1024 bytes together form what is called a kilobyte (KB). Thus 1 KB has 1024 bytes or 1024*8=8192 bits. Similarly, 1 MB has a capacity of over 1 million bytes, i.e.- 1 MB = 1024*1024 B. In the same way, 1 GB = 1024*1024*1024 B = 1073741824 B. So 1 GB has a capacity to store 1073741824 bytes or 1073741824*8 = 8589934592 bits.

In fundamental terms, 1 GB memory card has over 8.5 billion storage locations to data as high or low voltages digitally. Obviously a 8 GB card will have a higher capacity than 2 GB one due to 4 times more electronic devices for storage in it.

However, an SD card's GB-rating alone doesn't indicate the number of images/videos it can store. The image and video resolution and format too dictates it. The higher each image and video weighs, lesser the card's capacity becomes.

The same SD card when used in a low resolution camera, say 12.1 MP will store more number of images than in a high, say 14.2 MP camera. This is because with increasing resolution, the digital approximation generates more samples, resulting in smaller and hence greater number of pixels. As such for the same area of a photograph, there are more pixels in higher resolution and hence more digital samples/data to store on the SD card. More pixels ultimately lead to a clearer image. The same holds for videos too. The scanning technique- Interlaced or Progressive, and the resolution hold the key here. A 720p video is of inferior quality to a 1080p video. The same SD card will thus hold longer 720p videos than 1080p ones.

Image and video size is also dictated by formats used. The formats like JPG, MOV, MPEG, etc are what I mean here. These are compression algorithms that compress the voluminous digital data gathered from images and videos into compact files. Hence the need of codecs (to decompress) while opening a video! :) One particular format may compress the data more than other, increasing the number of images/videos per SD Card. However compression damages image/video quality. Panasonic cameras usually are known to occupy more per image than Canon/Nikon cameras.

Camera modes also dictate the size of each image/video and hence the number of data per SD Card. A 3D recording will cost more memory slots than a normal 2D one!

More from some expert on the subject. This was just a layman introduction from my side. :)




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