In order to change the quality or file size when using the Berkeley
encoder, you must change the three Q-scale values.

For example,
    IQSCALE    4
    PQSCALE    8
    BQSCALE    8
will get you results that are closer to those of CMPEG.  Using a value of 1
for all three will result in high quality and large size.  Using 31 for all
three results in very low quality and small size.

I've also noticed that, given the same parameters, the dos port produces
lower quality files than the Linux version.

--
Anthony C. D'Agostino - BMRT and POVRay Galleries
http://ourworld.compuserve.com/homepages/scorpius



Dick Balaska <dic### [at] buckosoftcom> wrote in message
news:385E697A.D29A8FED@buckosoft.com...
> I like the Berkeley encoder.  I think it produces pretty good mpegs,
> and they are much much smaller than the likes of cmpeg.  Bummer that
> it doesn't produce mpeg-2s.
>
> Here's the settings i used on one run:
>
> PATTERN IBBPBBPBBPBBPBB
> OUTPUT e:\povwin3\Buckosoft\mpegs\tteoac.mpg
> INPUT_DIR f:\povwin3\BuckoSoft\tteoac
> INPUT
> tteo*.ppm [0001-1752]
> END_INPUT
> BASE_FILE_FORMAT PPM
> INPUT_CONVERT *
> FORCE_ENCODE_LAST_FRAME
> GOP_SIZE 30
> SLICES_PER_FRAME 1
> PIXEL HALF
> RANGE 10
> #PSEARCH_ALG LOGARITHMIC
> #PSEARCH_ALG SUBSAMPLE
> PSEARCH_ALG TWOLEVEL
> #PSEARCH_ALG EXHAUSTIVE
> BSEARCH_ALG CROSS2
> #BSEARCH_ALG EXHAUSTIVE
> IQSCALE 8
> PQSCALE 10
> BQSCALE 25
> REFERENCE_FRAME DECODED
>
> I tried the EXHAUSTIVE algorithm which increased the encoding time from
about
> 6 hours to a couple of months without any real improvement

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