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afterdawn.com > forums > archived forums > mpeg-1 and mpeg-2 encoding (avi to dvd) > why is svcd file size always bigger than original mpg file?
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Why is SVCD file size always bigger than original MPG file?
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y_leo
Newbie
_ 		18. October 2002 @ 03:08 _ Link to this message    Send private message to this user   
It was my first time using Nero to create SVCD. When I draged my 550MB MPG file into the playlist, it showed the right file size 550MB. When I started burning, in the beginning it still showed 550MB, but after a few seconds it showed 640MB. Then I checked the burned CD-RW, the size of SVCD file was really 640MB. I tried another couple of files and found always about 20% size increase. How could this happen? Could it cause by some wrong settings? I used mostly default settings. Any suggestions are appreciated.
[ + quote]
VCDjunkie
Moderator
_ 		18. October 2002 @ 05:16 _ Link to this message    Send private message to this user   
both VCD and SVCD don't do bit by bit copy to burn, but rather use 1 minute = 10mb ratio, and 800mb can fit one 700mb cd becuase it doesn't throw in the extra bits used for error correction and such. I know it's confusing, but normally you can throw 80min video on a 80min cd, 74 for 74, etc..
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y_leo
Newbie
_ 		18. October 2002 @ 06:46 _ Link to this message    Send private message to this user   
Thanks a lot for your explanation. But in fact my encoded MPEG2 file is not standard SVCD. It's something between SVCD and DVD (more like miniDVD). Actually I have only 24min video in that 550MB MPG file, then I guess Nero should have treated it as normal file, maybe this has caused the size increase? I'd just like to know the exactly reason so that I can get good control of file size in the future.
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