[GRASS-user] Re: [GRASSLIST:1184] how to keep same color table for a bunch of rasters?

Māris Nartišs maris.gis at gmail.com
Thu Sep 7 02:18:07 EDT 2006

You mean like this?:
## Encode all .png files in directory to out.avi with 15 frames per second.
mencoder "mf://*.png" -mf fps=15 -o out.avi #-ovc here
## DivX - libavcodec MPEG 4 (DivX5)
-ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=1800
## XviD
-ovc xvid -xvidencopts bitrate=1024
## DivX4
-ovc divx4 -divx4opts q=5

Uses mplayer's encoder. Choose one of encoding formats and append to end 
of "mencoder" line. Unfortunately only way to know quality settings is by 
encoding, watching result and reendocing with different params.

Example (it's quite old and I don't remeber encoding params):
(Location: North Vidzeme, Latvia. Content: r.lake mapcalc version in action - 
filling Smiltene ice damed lake from seed point) You can see how changes lake 
color as it get's deeper.

Vishal Mehta - You could try out to define map's colors using explict category 
values (will this work with FP maps?) - just create file containing color 
rules with full range of data values (min, max for all maps), assign colors 
to values and apply color table with r.colors to all maps (sorry, no time to 


On Thursday 07 September 2006 04:00, Hamish wrote:
> for MAP in `g.mlist type=rast pat=rain*` ; do
>   r.info -r $MAP
> done
> If anyone has tips on constructing high-quality MPEG-4 movies from a
> series of still frames, I'd be interested in hearing them.
> Hamish

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