[XviD-devel] Min. FrameSize II

Dirk Knop xvid-devel@xvid.org
Sun, 15 Sep 2002 12:54:27 +0200


Hi,

i feel dumb, somehow my mathematics basics have left the building... ;)

Here some results:

Resolution | MBs | Minsize frame bytes
-----------+-----+---------------------
  320x240  | 300 |  48 (kf:  855 bytes)
  352x288  | 396 |  60 (kf: 1119 bytes)
  480x576  |1080 | 146 (kf: 3000 bytes)
  640x272  | 680 |  96 (kf: 1900 bytes)
  640x352  | 880 | 121 (kf: 2450 bytes)
  720x576  |1620 | 213 (kf: 4485 bytes)

All tests done at 1pass const. quant. 1, pure black image sequence.

I don't find the propper relation, I assume there is an avi frame 
overhead involved. The rest of the formula should look like this:

MBs / X + Y * Z + 24 = MinSize

Can someone give me a hand with this? Dan tried and offered to look into 
the sources, but maybe someone here has the magic numbers at hand ;)

Thanks for your help,

best regards,
Dirk