🚀 go-pugleaf

On Wed, 24 Dec 1997 02:04:01, cquirke@iafrica.com (Chris Quirke) 
wrote:

> 
> One stereo audio pair, OK.
> 
> Mixing 16 to 64 stereo pairs from arbitrary points on the hard drive
> and writing the output further on spooks me somewhat - surely there's
> going to be a lot of head-move-thrashing going on?  I've tried running
> two MPEGs off the same CD, not a pretty sight...

Agreed.  Any real-time mixing isn't going to be pretty from a 
single source.  This isn't a bandwidth problem so much (though 64
channels is getting up there ;-) as a seek problem.  This is 
going to drive the heads nuts!  I'm not sure you're going to do 
this real-time with current hardware.  The non-linear editing (at
this kind of data rate) I've seen is not done real time - on PC's
anyway.  The DV stuff I'm playing with is done more or less 
batch.  Once you do the mix, then even AC3 playback isn't a big 
deal, particularly if it isn't fragmented.  Full frame DV is a 
strech on any PC.
 
> >video carries stereo sound as well.  (though I think in this case
> >it's 32K samples/sec at 16 bit).
> 
> Seems like AVI does better sound than MPEG, at the expense of
> washed-out pixellated video - perhaps they split the bandwidth more in
> favour of audio than MPEG?

The AVI's I'm doing don't show pixellation, or it's not 
objectionable anyway.  These are full frame (a 4:45 minute clip 
takes 1GB) AVI's.  BTW, these cannot be shown full frame via the 
PC video at any decent frame rate (maybe 2 fps).    

----
  Keith R. Williams
  krw@ibm.net