Please help improve this article by citing reliable sources. You can be challenged and removed. (February 2008) DVR or digital video recorders are devices that record video on a hard disk. The term ownership refers to the DVR proprietary methods for the commercial control over the format DVR stop and prevent copying by others for a particular file. Video surveillance systems are used for the detection and recording of crime, but analysts and enforcement of laws for obtaining and processing the captured video with DVR owners can experience problems with the format propriétaire.Le rather than the owner’s standard DVR, PC DVR . actuellement, there is no standard-issue for the security industry forward. For this reason, analysts are required to get to see a consistent “player” for the video. Some DVR owners are delivered to end users in an executable file that allows players to navigate. Some require the installation of the reader. Others just need a codec to be on the system during playback, then it is a common drive shaft systems such as Windows Media.Certains DVR owners offering more than one output format, such as visible native format and a standard format such as AVI. Some also offer an NTSC output. Some security companies are reluctant to offer anything other than their proprietary format. The reasons for maintaining control over the file by the detection of conversion varies, but most business “untouchable” a marketable product, while ignoring the work of an analyst or a court to present the video required. Another point of sale systems DVR is the property of the compression. Video compression removes information in exchange for a smaller file size. The increase in density leads to the possibility for a long time save to disk, sacrifice at the expense of some details in the pictures. This compromise should be considered when trying to equalize the image quality and recording time in a DVR. As disc drives cheaper and sacrifices in order to improve compression. One problem inherent in the exclusive production DVR is accuracy. There are good chances that the video picture as in an aspect ratio of false and / or color information. Color can be turned off simply by using the calibration of the screen, but often the color information is not registered properly. It’s not very often introduced in white surveillance cameras, the balance if it is done. Aspect ratios can not be recorded properly and could in fact be very distorted. Aspect ratios on certain players are sometimes set by the user draw the viewer in one direction or another. In contrast to attempts by developers DVR owners, it is possible to change each image into another format DVR, but can be made through the digital conversion, such as a MPG2 to AVI. It is plagued by the interception of the pixels of DVR users sent to property monitor. There are a number of available software to be an area of a screen capture and create an uncompressed file in a format commun.Peu little, improve technology and DVR systems are expected to have properties of analog video, which could never exist. A special feature is the ability to store metadata, as a point of information for sale. Another feature is a trigger event (motion, panic button, open door / drawer) to a recording system with a higher resolution. Perhaps this feature is the ability to directly on a field of interest. External Links Tools rechercheG-Spot Appliance CodecLes samples from players Exif Reader PropriétaireIntellexRapid Eye DVR Multi (REM) conversion Wavstore wave player stream vision free / Tools analyzing virtual dub MPGMD5 Sum Links supplémentairesSTREAMVISIONPentamicroTechwell405EP IBM Power Generator PCStreamScaleAvTech surveillanceDédié micro quest DVR CCTV DVR categories: digital recorder hidden video categories: In connection Related articles February 2008 | All articles related to the topic
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