Digital video archive for a home use

Sooner or later the happy possessor of video camera runs into the problem of maintenance of the numerous recorded films. Her obvious decision - actually on video cassettes - surely, the simplest, but not always most effective. At first, the magnetic layer of tape has a tendency in course of time to peel off. And as a result very important film about the first steps of child can't live so long to wedding of the last. Secondly, cost of cassettes, especially mini - DV format, for the your purse is very sensible, and their number it would be desirable to limit to the preliminary home video recording (3-5 cassettes). In the third, their sizes are not depreciatingly small, and storage of large number of cassettes requires considerable space.

Finally, the last argument is related to the computer editing. The point is that the few remains the satisfied turned out "raw" video data - his post-treatment is usually required: "trimming" of superfluous fragments, transposition and smooth gluing together of successful plots and construction of showy transitions between them, imposition of titles, including of illuminations etc. All these operations can be fully completed on the modern home computer. It is enough to install  corresponding commercial video editing and authoring software, for example, from the complete set of miroVideo Studio or AverMedia. Special software for video capture will help to transfer your source movies from camera to the hard disk of computer. This video should be stored on cheap medias, like DVD and BluRay for future creation of new films you suppose yet not once to take advantage of the taken off materials. In a word, there is a task of archiving of video in a digital kind on compact, lasting and inexpensive medias.

The material point of software for home movie editing is the required quality of video. Certainly, it would be desirable as possible higher, but it enters into contradiction with the requirement of minimization of expenses. In addition, the self concept of quality is very subjective. In the search of reasonable compromise we will lean against classification of quality of video, provided by the consumer of different formats of record on a magnetic tape. Very conditionally, it is here possible to distinguish 3 levels: Standard Video (VHS, C - VHS, Video8), Super Video (SVHS, C - SVHS, Hi8) and Digital Video (DV, mini - DV, Digital8). For simplicity in future we will designate them as Video, S - Video and DV. In number they are usually characterized by horizontal resolution (by the number of the elements distinguished in a line - television lines). It is considered that Video provides resolution to 280 lines, S - Video are to 400 lines, and DV - no less than 500. It is important to mark that a television screen (here and further PAL of standard) contains 576 active lines (in all them 625, but part from them official), thus in obedience to recommendation of ITU - R BT.601 international professional television association (ITU - International Telecommunications Union) every line contains a 720 independent pixels. Thus, fundamentally a television screen is a matrix of 720—Ö576, and maximum attainable resolution is limited to 700 lines.

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