[PD] (GEM) pix_movie & pix_add ?
IOhannes m zmoelnig
zmoelnig at iem.kug.ac.at
Mon Apr 8 11:19:41 CEST 2002
below, i am referring to gem-0.87 (and no prior versions)
chris clepper wrote:
> i found this in the docs:
> Can't process pix_movie data with pix objects
> POSTED 4/24/99
> BUG: pix_movie sends the data immediately to OpenGL, so ther
> is no chance to process the data.
> some geos don't render data from pix_movie correctly
this is out of date.
it is true for [pix_movie], BUT::
with [pix_film] you *can* do image-processing !
>> i get "error: Gem: pix object cannot handle gray image" when sending
>> pix_movie(s) to pix_add...
>> (same error with pix_mask too)
there is the [pix_rgba] object that tries to convert all non
rgba-formats to rgba which can then be processed by other objects, like
>> i'm using MJPEG coded videos (yes, they are in color. but i don't
>> think this the problem)
in fact, this is the problem, since normally movies will store data in rgb.
to avoid overhead, pix_movie (and pix_film) do *not* convert the data to
almost all pix-objects have methods for rgba-images (which are "colour"
in Gem) but some do not have methods for other colour-spaces, like "rgb"
(which are called "gray" -- though obviously they are not)
>> (win2k, pd0.35-17, gem 0.85)
what i said above applies to gem-0.87 only.
there are no precompiled binaries for windows right now, but the sources
(which can be found somewhere at
ftp://iem.kug.ac.at/pd/Externals/GEM/LINUX ) should definitely compile
under both windows and linux.
>> ps. maybe i should use pix_multiimage instead...
i do not think that this is a good solution for movies (when they are
longer than some secs)
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