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A Video processing expansion card is a computer expansion card that allows a computer to receive television signals, record video and playback video content.
Video capture
Video capture cards are currently PCI card or AGP card that allow a computer to capture composite, or modulated video. A good quality one may cost more than $50 and should not cost more than $300 as an all-in-one package including a high end graphics card. Unlike video editing cards these cards tend to not have dedicated hardware for processing video.
Video cards and Audio cards are hardware - software combinations which are used for importing video and audio clips into a computer. The source of video and audio may be camcorders, CD, DVD, TV, tape recorders, microphone, or audio data stored on the computer.
Video editing cards allow a video or audio clip editing. These cards are also used to enhance the video or audio clip's qualites (colour, sharpness, length etc. of video clips and volume, quality, length and sterio effect of audio clip). Editing cards also assist in the dubb of sound on video clips, adding new sounds and synchronization of sound with video clip (e.g. lip movements are perfectly matched with dialogus etc.). Apart from these, titles can be given to a video clip/movie. Titles can appear and disappear in various ways (flying, slowly changing into other titles etc). Such mixing in a video clip can also create a three dimensional effect for the finished product.
Video editing
These cards often have dedicated hardware for the express purpose of handling the rendering of video streams. Some of these cards offer real-time video editing.
Manufacturers like Matrox, Pinnacle Systems and Canopus produce PCI video editing cards. Pinnacle also produced an AGP version that doubled up as a standard graphics card. All the manufacturers are now attempting the transition to PCI-Express versions of their cards.
See also
Reference
External links
"Video processing expansion card"