How to resize a video without loosing quality

HI
 I have a .flv video (320*240) and I need to resize it to (480*560).
What is the best way to do it without loosing quality?
Thanks

I am using FLASH CS3
LVL 4
eddyperuAsked:
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CyanBlueConnect With a Mentor Commented:
Re-encode the video at 480*560 in a video editing program such as Premere...  That's the only way to keep the quality of it...

CyanBlue
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athomsfereCommented:
It is going to look like you lose quality, you are taking a limited amount of information and stretching it... there is no way to add information to make it look good bigger
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mpstensonConnect With a Mentor Commented:
You actually won't want to bring it into premeire, because that will actually cause the video to lose quality.  It is the copy machine principle.  If you make a copy of a copy you lose resolution and clarity.  The same is true for compressed video.  You best bet is to force the display resolution to larger than the actual size of the video.  
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CyanBlueCommented:
Oh, I meant re-encode a new video with the source not with the actual FLV which is in 320*240...

CyanBlue
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eddyperuAuthor Commented:
Thanks!!
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eddyperuAuthor Commented:
I use a program call "SUPER" to re-encode the video and now it is working, thanks you guys!
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eddyperuAuthor Commented:
Thanks
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