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Originally Posted by me4linux
Will the size decrease if i convert a video file[mpeg/dat/avi...etc] to XviD format without any loss in the quality of the video when compared with the original one ???
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well avi is a container while mpeg (like mpeg1, mpeg2 etc. )is a codec so depending on what codec you use and amount of compression you are bound to lose some quality when you compress video (this is true for any codec on the planet). Without quality loss is a misnomer. Video when compressed invariably loses quality...what differentiates good codecs from bad ones is the final quality and how it can be reproduced with least quality loss.
Check out the links below to gain more understanding of the various formats.
http://en.wikipedia.org/wiki/Audio_Video_Interleave
http://en.wikipedia.org/wiki/Mpeg
http://en.wikipedia.org/wiki/Theora
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Please tell me how to install XviD/Theora using yum ???
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That's for you to research...for generalized questions like this google yum tutorial on the net.
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Is there any GUI to work with these converters...OR only CLI
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I always use CLI but you can look at
OggConvert and OGMRip.
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Can u give me some basic commands to convet videos ??
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Once you are ready, I can give you some of the links to tutorials. As I said, I extensively use xvid and mencoder to produce the xvid coded files.