[GEM-dev] pbs with GEM on macpro quad

[chris clepper]

On 4/17/07, cyrille henry <cyrille.henry at la-kitchen.fr> wrote:
>
> hello,
> i'm curently working on a mac pro quad (and HCS pd39-2-extended RC1).
> i've got 2 problems.
>
> 1 st : reading movie does create a new thread as i can see in activity
> monitor, but the cpu used by pd + reading movie does never exeed 100%
> (i.e 25% of the all CPUs).
> is there a solution to improve this? i would like to be able to play
> many movie using 4 core of this computer.


Depends on what codec you use.  All of the DV codecs use multiple threads to
decompress and so does Apple Intermediate Codec.

i also have a problem with pix_coloralpha. it look like pix_coloralpha
> does not change the alpha chanel of the movie.
> i test the same patch / same movie on linux where everything is working
> ok. is there something that i should know to use this on osX?


The default colorspace on OSX is YUV so there is no alpha.  You can send a
'colorspace rgb' message to pix_film which will slow everything down a lot
or use a shader which will be fast.

thanks
> Cyrille
>
>
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