On Thu, 2006-01-19 at 08:50 -0500, Boleslaw Ciesielski wrote:
> [EMAIL PROTECTED] wrote:
> > I'm using PVR-250's/350's, w/bitrate of 4500 and max bitrate of 6000
> > (e.g., the defaults). I typically record 64 minutes per 1h show
> > (e.g., I pre- and post-roll by 2m). The resulting files are all
> > within 1% of 2,500,000,000 bytes (written this way so you know I
> > mean decimal bytes, e.g., 2.5 gigabytes and -not- 2.5 gibibytes.)
> >
> > But if you actually do the math...
> >
> > > dc
> > 4500 1024 60 64 *** 8 / f
> > 2211840000
> >
> > ... it's pretty clear that 4500 kilobits/sec -should- be generating
> > only 2.2 gigabytes in 64 minutes. (And that's assuming that the use
> > of "kilobits" in the UI really means 1024 bits, and not 1000 bits,
> > or the discrepancy is even larger.)
>
> AFAIK, audio has it's own bitrate and it's not counted as part of the
> video bitrate.
>
> Bolek
Also, 4500 is the average bitrate... as you stated yourself, the max
bitrate is 6000, so you may have spikes beyond 4500, rendering direct
math inaccurate.
--Matt
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