Hello list,
I have performance problems in Gem while playing an mpeg and connecting to my camera with firewire. The problem is when i start rendering the pd process is on nearly 100% and every 5 to 10 seconds a new frame is displayed. Also the mouse and keyboard events are responding after some seconds. Xorg is using nearly nothing of cpu time. In glxgears i got a framerate about 4000fps... Direct Rendering is enabled...
My cpu should be fast enough (1,7GHz)...
I've tried gem version 0.9 and the newest from cvs...
LG Christian
Hi Christian,
if you're capturing your live video at max resolution, you should try to reduce the resolution ... Capturing dv via firewire at full res pretty much maxes out my cpu, which is a p4 running at 2.6gigs (gem 0.90.1 on win2k). remember that we're talking about more than 3mbytes per second that need to get into you computer first and then onto your graphics card. Lowering the resolution to dv_quarter leaves me with about 20 percent cpu usage (and some spikes every now and then), which is quality-wise a trade-off I can live with. appearantly, the process of getting those data into the vram is much more optimised when running gem on recent macs. a while ago, someone stated on this list that displaying two hd-streams simultanously (1080i each) left a lot of cpu power unused on this platform.
hope this helps, thoralf.
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Hello Thoralf,
if you're capturing your live video at max resolution, you should try to reduce the resolution ...
I don't know how to reduce the resolution, i could only set the [quality( that means i can change between black/white and color mode and a mode whith very very low resolution. But i've dedected that if i start rendering the first time the performance is bad and the output is somehow zoomed in. If i stop rendering and start it again it's working how it should... Only with a little delay which is acceptable. And the same behaivior is when i playing a film...
lg Christian
Hello,
I don't know how to reduce the resolution, i could only set the
[quality( see help patch of [pix_video], you can set the resolution there with a message ...
yes i think it's [dimen x y( but not for ieee1394...
lg Christian
Hello,
But i've dedected that if i start rendering the first time the performance is bad and the output is somehow zoomed >in. If
i
stop rendering and start it again it's working how it should... >Only with
a
little delay which is acceptable. And the same behaivior is when i playing a film...
Always when i open a new film with pix_film i have to stop and start rendering again... So I work well with gem. Could that be a bug in Gem or is something wrong with my graphic card driver or openGl settings???
lg Christian
-
Christian Veit -
Georg Holzmann -
Thoralf Schulze