Utility and Challenges of Video Search Engines
– Increasing creation of audiovisual content
– Need to manage audiovisual content properly
– Digitization of audiovisual archives
– Large quantities of video files stored in databases
– Difficulty in recovering data due to semantic gap
– Visual search technology for video is not yet viable
– Speech-to-text technology has limitations with background noise and multiple speakers
– Efforts to improve video search require redevelopment of search methods
– Different algorithms and techniques are used to enhance video search accuracy
– Companies continue to work on improving video search technology
Search Criteria and Ranking in Video Search Engines
– Search criteria depend on the nature and purpose of searches
– Different search criteria used by each search engine
– Criteria determine how search results are ranked
– Relevance, popularity, and authority of videos considered
– Sorting options available for search results
Metadata in Video Search Engines
– Information about facts in videos
– Author, creation date, duration, etc.
– Encoded in XML format for easy retrieval
– Internal metadata within video files
– External metadata from video page
Speech Recognition in Video Search Engines
– Transcription of speech in videos
– Helps in searching for specific content
– Google Audio Indexing project uses voice recognition technology
– Speaker recognition to identify different speakers
– Yellow markers indicate transcribed text in YouTube videos
Text Recognition in Video Search Engines
– Recognizing characters in videos through chyrons
– Search engines allow playing video from specific point
– TalkMiner uses text recognition to search for specific fragments in videos
– Analyzes videos for slide identification and uses OCR for text detection
– Offers thousands of videos from institutions like Stanford and TED
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.
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