Recording bit rate from file size?

[mikeh49]

I noticed one of my recordings looked considerably better than the usual recordings. The file size is about 2.3GB for an approximately 30 min recording. The usual recordings are about 1.4GB for a 30 min recording. I looked at the files with GSpot and it reported that the 2.3GB file was 11250 kb/sec while the 1.4GB file was 10406 kb/sec VBR. I have normally had Medium quality in direct.ini set to the High quality bit rate (5500 variable, 9000 peak) so Quick Record records at High quality. I was doing some experimenting with this, but can't remember what the setting might have been for the 2.3GB file.

So, is there a way to translate from the GSpot values to GBPVR direct.ini values, or is there another way to determine the GBPVR bit rate used for a recording?

Thanks.

[pBS]

now remember, that's a variable bit rate, so some content will look much better than others...low motion looks significantly better than action with vbr...while stil keeping approx. same average bitrate...
plus i've noticed some 'sweet spots' in the bitrate ranges...it like even numbers..
and multiples of 4 or 8...
like going from 4000 to 4001 actually makes it look slightly worse...
but it may be a perception thing...
also, sometimes the driver balks at the noise reduction settings, reboot usually fixes that...[turns off noise reduc. by itself after long periods of operation]
like that part of driver crashes returning to defaults...
but YMMV
i find anything over 7 or 8000 doesn't have any effect,just larger files..