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What is XVid codec and do I need it on my computer?

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Hello GeeksToGo,
I was just wondering what is XVid. I recently downloaded it after i recieved a video by e-mail to download. After the downloading started a window came up telling me that the video I was downloading would not play unless I downloaded XVid codec. Is this a legitimate codec or is this a malware version.

Thanks in advance,

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Neil Jones

Neil Jones

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Xvid is a MPEG-4 video codec for PC. Its purpose is to compress video in order to allow for faster transmission over computer networks or for more efficient storage on computer disks. Hence, Xvid can somewhat be seen as a ZIP for video. Xvid removes information from video that is not important for human perception in order to achieve very high compression rates while still keeping very good visual quality. As an example: uncompressed digital video is huge and takes up about 100 GB HD space per hour. The same video would require just 500 MB per hour when compressed with Xvid at high quality. So Xvid can compress video at ratios of 200:1 and more.
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