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The majority of 35 mm film systems, cameras, telecine equipment, optical printers, or projectors, are configured to accommodate the 4-perf system; each frame of 35 mm is 4 perforations long. 4-perf was (and remains) the traditional system, and the majority of projectors are based on 4-perf, because 4 perforations is the amount needed per frame vertically in order to have enough negative space ...
Samsung NX1 - First prosumer camera to record in HEVC, 4K downsampled from 6.5K, 80 Mbit/s in H.265. 30 min max recording time limit Samsung NX500 - Same 28 MP APS-C sensor as NXI but 4K video is not downsampled from 6.5K so less details and more noise than the NX1 - with this 2.4× crop factor the kit lens become a 38–120mm f8.5–13.4 ...
Camera Sensor size Crop factor [1] Lens Mount [2] Recording media [3] Codec Maximum video resolution ISO range Dynamic range (at native/peak ISO) Shutter type Anamorphic shooting Internal filters Frame rate(s −1) Arri: Alexa [4] Alexa Plus 23.76 x 13.37 mm 1.52 Arri PL: SxS card, T-link recorder (optional XR module upgrade) [5]
Most video coding standards, such as the H.26x and MPEG formats, typically use motion-compensated DCT video coding (block motion compensation). [ 70 ] [ 71 ] Most video codecs are used alongside audio compression techniques to store the separate but complementary data streams as one combined package using so-called container formats .
Video quality is a characteristic of a video passed through a video transmission or processing system that describes perceived video degradation (typically compared to the original video). Video processing systems may introduce some amount of distortion or artifacts in the video signal that negatively impact the user's perception of the system.
YouTube began supporting 4K for video uploads in 2010 as a result of leading manufacturers producing 4K cameras. [78] Users could view 4K video by selecting "Original" from the quality settings until December 2013, when the 2160p option appeared in the quality menu. [ 79 ]
Generator locking can be used to synchronize as few as two isolated sources (e.g., a television camera and a videotape machine feeding a vision mixer (production switcher)), or in a wider facility where all the video sources are locked to a single synchronizing pulse generator (e.g., a fast-paced sporting event featuring multiple cameras and recording devices).
[clarification needed] This knowledge allowed RCA to develop a system in which they discarded most of the blue signal after it comes from the camera, keeping most of the green and only some of the red; this is chroma subsampling in the YIQ color space and is roughly analogous to 4:2:1 subsampling, in that it has decreasing resolution for luma ...
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