[GEM-dev] .mov linux optimisation

[cyrille henry]

IOhannes m zmoelnig a écrit :
> cyrille henry wrote:
>> hello,
>>
>> i noticed that reading a 640x480 30fps .mov file with gem use 70% of my
>> cpu. (2.13 centrino)
>>
>> the same file read with vlc use less than 10%
>>
>> is there anything i can do optimise movie in gem?
> 
> you could try to choose a different decoding library with [pix_film]
> with the 3 argument to the [open( message (e.g. try [open file.mov rgba
> 4( to first try to 4th available decoder)
> try to switch between aviplay and quicktime to see if you get anything
> better (and/or try to use ffmpeg (which youcurrently don't have installed)
ok, i was not able to fine a decoding lib that use less CPU.
what lib should i install to enable ffmpeg?

> 
> furthermore, Gem really provides random access to each frame (when
> possible), which might give an extra penalty.
> it would be nice to be able to switch between random-access and
> sequential reading.
at least with "auto 1"

thanks for the answer
Cyrille

> 
> mfg.asdr
> IOhannes
> 
>> here is my ./configure output.
>>
>> thanks
>> Cyrille
>>
>>
>>
>> Result:
>>   Target                 : Gem.pd_linux
>>   Objects                : Base Controls Geos Manips Nongeos Particles
>> Pixes ope nGL
>>
>> Configuration:
>>   Compiler               : g++
>>   CXXFLAGS               : -g -O2 -fPIC -freg-struct-return -O3
>> -falign-loops=16  -funroll-loops -ffast-math -mmmx
>>                          : -I/usr/include/lqt -I/usr/include/lqt
>> -I/usr/includ e/avifile-0.7   -I/usr/include/freetype2
>>   INCLUDES               :  -I/usr/include/FTGL -I/usr/include/freetype2
>>   DEFINES                :
>>
>>   LIBS                   : -ldv -lmpeg -lmpeg3 -ljpeg -ltiff -lGLU -lGL
>> -lXext - lXxf86vm -lXext -lX11 -ldl -lz -lm   -L/usr/X11R6/lib -lpthread
>>                          : -lGLU -lGL -lfreetype -lz -lftgl_pic
>> -laviplay   -L /usr/lib -lquicktime -lpthread -lm -lz -ldl -lquicktime
>> -lpthread -lm -lz -ldl
>>   LDFLAGS                : -shared -Wl,-export-dynamic -lGLU -lGL
>> -lfreetype -lz  -lftgl_pic
>>                          :  -L/usr/X11R6/lib
>>
>>   Strip                  : strip --strip-unneeded
>>
>>   Install path           : /usr/local
>>
>>  pure-data:
>>   version                : 0.40
>>
>>  used optional libraries:
>>
>>   font-rendering         : FTGL
>>
>>   image-support
>>     use ImageMagick      : no
>>     use TIFF             : yes
>>     use JPEG             : yes
>>   video-support
>>     use mpeg             : yes
>>     use mpeg-3           : yes
>>     use QuickTime        : yes
>>     use aviplay          : yes
>>     use ffmpeg           : no
>>   input-support
>>     use v4l              : yes
>>     use ieee1394         : yes
>>
>>   misc
>>     using ARB-extensions : yes
>>     using NV-extensions  : yes
>>     using reg-struct-ret : yes
>>
>> Now run make ...
>>
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> 
> 
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