Video search

A video search engine is a web-based search engine which crawls the web for video content. Some video search engines parse externally hosted content while others allow content to be uploaded and hosted on their own servers. Some engines also allow users to search by video format type and by length of the clip. The video search results are usually accompanied by a thumbnail view of the video.

Video search engines are computer programs designed to find videos stored on digital devices, either through Internet servers or in storage units from the same computer. These searches can be made through audiovisual indexing, which can extract information from audiovisual material and record it as metadata, which will be tracked by search engines.

the main use of these search engines is the increasing creation of audiovisual content and the need to manage it properly. The digitization of audiovisual archives and the establishment of the Internet, has led to large quantities of video files stored in big databases, whose recovery can be very difficult because of the huge volumes of data and the existence of a semantic gap.

The search criterion used by each search engine depends on its nature and purpose of the searches.

Metadata is information about facts. It could be information about who is the author of the video, creation date, duration, and all the information that could be extracted and included in the same files. Internet is often used in a language called XML to encode metadata, which works very well through the web and is readable by people. Thus, through this information contained in these files is the easiest way to find data of interest to us.

In the videos there are two types of metadata, that we can integrate in the video code itself and external metadata from the page where the video is. In both cases we optimize them to make them ideal when indexed.

All video formats incorporate their own metadata. The title, description, coding quality or transcription of the content are possible. To review these data exist programs like FLV MetaData Injector, Sorenson Squeeze or Castfire. Each one has some utilities and special specifications.

Keep in mind that converting from one format to another can lose much of this data, so check that the new format information is correct. It is therefore advisable to have the video in lots of formats, so that all search robots will be able to find and index.

In most cases the same mechanisms must be applied as in the positioning of an image or text content.

They are the most important factors when positioning a video, because they contain most of the necessary information. The titles have to be clearly descriptive and should be removed every word or phrase that is not useful.

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Wikipedia