Distributions of video productions
BluRay & DVD
A traditional, but still common medium is the DVD on which films can be saved at low cost and in good quality. The higher resolution successor is the Blu-Ray. You can store and play contents in HD. A Blu-Ray needs a specific playback device, since neither DVD-Player nor a DVD-disc drive can play it.
Fundamentally, one has to differentiate between Data-Disc and Video-Disc in both formats.
The Video-DVD (or Blu-Ray) has a standard programming, which can be played from regular DVD-Players. Internet links and downloads are not possible
The DVD-ROM as a data medium can have every possible software programming and can be used with a computer. The most regular quality contains about 60 to 90 minutes of film. Twice the storage is provided by “double-layer-DVDS” which, however, require a suitable playback device. The fundamental data format for the DVD is the MPEG2 format.
While the DVD has become obsolete from a technological point of view, concerns regarding internet security and compatibility still make it the medium of choice for many companies.
Nevertheless, most of films are distributed via the internet today. The quality depends on the potential data rate, which again depends on the speed of the internet access on the user’s side. Theoretically films can be shown in every resolution – provided you have the appropriate internet speed.
Full-HD resolution has become standard in the consumer area and can be shown on almost every playback device.
Normally you need a special software to play films. The most common formats are Windows media files which are shown by the Windows Media Player or QuickTime files (originally developed for Macintosh), as well as platform independent MP4- and Flash-formats. The so-called VLC-player can cope with almost all formats on basically every platform.
There are generally two ways to watch films on the internet. With a download, the data is stored on the computer of the user. Only when the download is finished it´s possible to watch the film. In the best quality downloading can take a lot of time. If you stream a video you can watch it while it is loaded in the background. The waiting time is much shorter but if the connection is poor the film can be jerky. After watching, data are deleted automatically and have to be reloaded for repeated watching.