On Fri, Sep 19, 2003 at 10:47:35PM -0700, Steven M. Schultz wrote:
> 
> 4 encodings were done using -N of 0, 0.5, 1.0 and 1.5 (and 2
> different -q values, and using yuvdenoise in -f and -l modes).
> Quite an exhaustive (and time consuming ;)) set of runs.
> ...

I have some more real world numbers to report:

The only difference between these files was different -N values.  All
other denoise/mpeg2enc parameters were identical.

                      delta from        delta from
-N   Size in bytes    adjacent lower    -N 0.0
                      -N value
0.0  2,177,741,853
0.1  2,112,185,457     65,556,396        65,556,396
0.3  1,946,169,140    166,016,317       231,572,713
0.4  1,888,393,867     57,775,273       289,347,986
0.5  1,789,601,407     98,792,460       388,140,446

The setting of -N does work nicely to fine tune a files resultant
size, but clearly it's also a non-linear function as you already
suggested it may be in an earlier email.


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