hello,
chris clepper a écrit :
On 4/18/07, cyrille henry cyrille.henry@la-kitchen.fr wrote:
Depends on what codec you use. All of the DV codecs use multiple threads to decompress and so does Apple Intermediate Codec.
i made a test patch that should decompress and display about 10 DV quality movie. the activity monitor says that pd use more than 30 threads. BUT, pd use 25% of every core, and GEM display 3 images /s. there is a problem somwhere, but i can't find what.
Which version of GEM?
0.91-cvs, april 14 2007, from HCS installer
There is a problem with the QT DV component looping the audio track that will do exactly what you describe. I disabled the first audio track in any movie file in the GEM code but your clip might have more than one audio track.
i'm quite sure there is not audio track.
Also at a certain point you will hit the limit of what the machine will do. The Mac 'Pro' isn't as fast as Apple's marketing wants it to be. The Intel chips have serious memory bus speed problems and the OSX kernel likes to destroy any CPU affinity.
hum. i don't need the fastest computer of the world, but i just want to use the 4 cores!
If you do not need any pix_ objects for processing then use pix_movie. That will improve performance quite a bit since it uses the fastest texturing path.
yes, that does improve performances. i hope using pix_movie + shader will be ok.
thanks a lot Cyrille