Re: Relationship between fps and Kbps

Mark Goldstein (
Mon, 30 Dec 1996 18:00:26 -0800

>Does anyone know why there can be high Kbps being sent between two people
>on DC connection yet the fps is prctically nothing? What is the
>relationship? I know that the fps is the frame grabbing rate and not the
>send rate but what the heck are you sending at 30Kbps if you are only
>grabbing 0.1fps? On the other hand I can be grabbing lots of frames and
>sending low Kbps, or low on both figures.
>Also I can sometimes be indicating a receive of .1 or .2fps but am getting
>a complete frame of movement despite the low figures.
>This is on a connection with someone who is accessing via a T1 connection
>but both machines are set to the same send and receive of 28Kbps because of
>my modem limit.
>The software just doesn't seem to be able to share the bandwidth evenly at
>all. Sometimes my vid gets through well apparently but then hardly moves
>for a long while. The vid I receive seems more consistent but still varies
>a lot.

In my experience, this is a function of your processor and video speed,
especially the processor speed. Using the same connection at work on two
different machines, I have been able to get between 10kbps and 15kbps
from a particular reflector. One machine is a 486DX/4-80 and the other
is a Pentium 120. On the 486, I usually see between 0 and 1 fps, but on
the Pentium, I get 5 to 7 fps. Again, this is the same reflector, the
same connection, just different machine speeds.

I've also been told by White Pine that processor speed is the number one
factor in how fast your video refreshes (ie frames per second).


                                \\\//                      To err is human,
                               -(@ @)-                     To moo, bovine.
  Mark Goldstein