Hi, I am having some problems with playing large video files. (>1GB). After some time sound starts to stutter and interaction is disturbed (bad timing delays). I tried to use smaller video resolutions, less frames per seconds, larger latency, lower samplerate, and so on. I can not tell, why for several seconds it is ok, but then problems appear. Maybe always when GEM reads a new part of the video data to the memory of the grafic card? I have a ATI mobility Radeon grafic card with 16MB of memory and the cpu is a P4 with 2 GHz, WinXP. What should I try next? Is there any other object besides pix_film/pix_movie? What exactly causes the performance problem? thanks in advance, marius.
I think we need more info before starting to diagnose the problem.
What format are the files? Quicktime, MPEG, AVI?
What codec(s) are you using?
What are the dimensions of the films? What is the duration in frames?
Do the clips have audio or are you referring to the pd audio DSP?
Can you monitor the system performance and memory usage and report that?
Thanks cgc
On Jun 8, 2004, at 4:21 AM, marius schebella wrote:
Hi, I am having some problems with playing large video files. (>1GB). After some time sound starts to stutter and interaction is disturbed (bad timing delays). I tried to use smaller video resolutions, less frames per seconds, larger latency, lower samplerate, and so on. I can not tell, why for several seconds it is ok, but then problems appear. Maybe always when GEM reads a new part of the video data to the memory of the grafic card? I have a ATI mobility Radeon grafic card with 16MB of memory and the cpu is a P4 with 2 GHz, WinXP. What should I try next? Is there any other object besides pix_film/pix_movie? What exactly causes the performance problem? thanks in advance, marius.
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ok, i will write my answers between your questions. concerning format, I can render whatever format is needed. The resolution should be at least 400*300, fps at least 15. (i think that should be possible???) I texture the film to a [rectangle 6 4] with a GEM window size 1024*768 (which is the screen resolution of my tft). m.
I think we need more info before starting to diagnose the problem. What format are the files? Quicktime, MPEG, AVI?
I used avi-files, but tried also quicktime-movies
What codec(s) are you using?
no idea. (no compression).
What are the dimensions of the films? What is the duration in frames?
about 4000 frames.
Do the clips have audio or are you referring to the pd audio DSP?
clips have no audio. readinge form wavetables.
Can you monitor the system performance and memory usage and report that?
I measure with the windows task manager which says memory usage is 160 MB and cpu ist maximal 20 %
Thanks cgc
switched to a faster pc. and works better now. 2,6 GHz, 64MB graphic memory... m.
----- Original Message ----- From: "marius schebella" marius.schebella@chello.at To: "chris clepper" cgc@humboldtblvd.com Cc: pd-list@iem.at Sent: Tuesday, June 08, 2004 7:31 PM Subject: Re: [PD] large video with pix_film
ok, i will write my answers between your questions. concerning format, I
can
render whatever format is needed. The resolution should be at least
400*300,
fps at least 15. (i think that should be possible???) I texture the film
to
a [rectangle 6 4] with a GEM window size 1024*768 (which is the screen resolution of my tft). m.
I think we need more info before starting to diagnose the problem. What format are the files? Quicktime, MPEG, AVI?
I used avi-files, but tried also quicktime-movies
What codec(s) are you using?
no idea. (no compression).
What are the dimensions of the films? What is the duration in frames?
about 4000 frames.
Do the clips have audio or are you referring to the pd audio DSP?
clips have no audio. readinge form wavetables.
Can you monitor the system performance and memory usage and report that?
I measure with the windows task manager which says memory usage is 160 MB and cpu ist maximal 20 %
Thanks cgc
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dear all,
Is there a way to get the current frame number of a GEM object [pix_film] launched in "auto-start"?
vincent
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chris clepper -
marius schebella -
vincent Rioux