Hi:

For a given resolution, only a certain range of bitrates makes any sense!!

According to the article which is about DVDs but applies to PVR-x50 cards too
http://www.mediachance.com/dvdlab/tutorial/bitrate.html

For 352x480 MPEG-2 we will get: Min: 2500-2800, Average: 3300, Max: 4200
For 720x480 MPEG-2 we will get: Min: 4800-5800, Average: 6400, Max: 8000

Note:
at 352x480, going past a bitrate of 4200 will not make it look any better 
but will make a bigger file.

I like to keep my recordings DVD compatable,
so that limits me to 720x480, 352x480 (and a few other resolutions)

my Default profile is 352x480 @3500 (max 4000) -> 1.68 GB/h
my Low Quality profile is 352x480 @3000 (max 4000) -> 1.46 GB/h

ymmv
-- 
Risto Treksler
Elkhorn Lodge
Banff, Alberta, Canada
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