Hi Mr. Clepper. Thanks for you reply.
I have been using a Mac with a 2 x 2,8 GHz Dual-Core Intel Xeon processor.
There are ProRes codecs here. 4444, 422 (proxy) 422 (HQ), 422 (LT), and 422. Does it matter which one I use?
I have no audio in the patch. How do I activate these -noaudio and -nomidi settings?
Best regards, Stephan
On Fri, Mar 1, 2013 at 10:25 PM, chris clepper cgclepper@gmail.com wrote:
I had no problem playing 4 or more AIC 1080@30fps files in 2007 on a MacPro or Quad G5. What sort of hardware are you using?
Photo-Jpeg is not multi-threaded so playing multiple clips will have much worse performance than AIC. If you have access to it, the ProRes codecs can also be very fast for HD. Adobe and Avid have similar codecs as well.
It could be the lag is from the -rt setting so GEM uses all available processing. The best setup for GEM on OSX is -nrt -noaudio -nomidi (and -nogui if you can work with it).
On Fri, Mar 1, 2013 at 3:39 PM, Stephan Elliot Perez < dreamoftheshoreofanotherworld@gmail.com> wrote:
So, I reduced the resolution of the files from 1920 x 1080 to 800 x 450 with the Apple Photo -Jpeg codec and now I have no lag.
The loss in quality is of course noticable, but tolerable...
Thanks again for you help, Stephan
On Thu, Feb 28, 2013 at 9:13 AM, news@petervenus.de wrote:
Hello!
what video codec are you using? in my experience, a big issue when playing back video with gem, comes from the codecs and container, resulting in extreme differences in cpu-load. i found, that mov-container work way better than avi-container, even though the same codec is used and packed in the container. try converting your videos to a motion-jpeg codec packed in a quicktime-mov. you could use mpeg-streamclip [1] for that purpose on win /mac machines or ffmpeg on linux.
[1] http://www.squared5.com/ free tool for video conversion
regards, peter
*Gesendet:* Mittwoch, 27. Februar 2013 um 23:55 Uhr *Von:* "Stephan Elliot Perez" dreamoftheshoreofanotherworld@gmail.com *An:* "Cyrille Henry" ch@chnry.net *Cc:* pd-list@iem.at *Betreff:* Re: [PD] file format for GEM A more urgent problem: Although the CPU usage stays under 100 (peak is around 84 with three videos overlapping), there is a substantial amount of lag. If I turn off video processing, a command that should be executed after 30 seconds via the cue list is executed punctually. If I turn it on, the command is 11 seconds late.
I can attach the patch if you like, but I probably will not be able to send the video clips as one attachment.
Best regards, Stephan
On Wed, Feb 27, 2013 at 8:19 PM, Stephan Elliot Perez < dreamoftheshoreofanotherworld@gmail.com> wrote:
What is a shader, and how do I use it?
On Wed, Feb 27, 2013 at 7:25 PM, Cyrille Henry ch@chnry.net wrote:
Le 27/02/2013 19:17, Stephan Elliot Perez a écrit :
Thanks, it works now. For some reason, turning "auto" on and off
(with pix_film) causes the video to lag temporarily, but I do not have this problem if I use line-objects to go through the frames. The cpu-usage goes above 100 if I have more than two videos playing at once, but I suppose I don't need more than two for this project...
Also, what can I do if I want an additive blend instead of a normal cross-blend?
i would use a shader for this. it offer great flexibility, even if it's a bit harder to begin with. but that's the way openGL wants you to do now. cheers c
On Tue, Feb 26, 2013 at 10:16 PM, Cyrille Henry <ch@chnry.netmailto: ch@chnry.net> wrote:
hello, Gem is mostly design to work on the GPU, and not on the CPU. GPU have hundreds of core, they are faster than CPU for imagemanipulations.
pix_add come from the 20th century and should now be avoid sinceit use cpu not gpu ;-)
in order to make a fade transition between 2 videos, you can usetransparency on one video. add a [alpha] object after Gemhead, and send number between 0 and 1 in the last inlet of the colorRGB object to make the video appear / disapear.
cheers c Le 26/02/2013 21:33, Stephan Elliot Perez a écrit : Hello, So, looking at the help file for [pd~], it seems tobe primarily for audio. How can I use multiple cores to work purely with GEM? I am trying to have a simple transition between video clips, but if I have two instances of pix_film and then connect them to pix_add, the CPU-ussage skyrockets well above 100... is there a more efficient object for blending two video clips?
Best regards, Stephan On Sun, Feb 3, 2013 at 10:54 PM, Thomas Mayer <thomas@residuum.org mailto:thomas@residuum.org <mailto: thomas@residuum.org mailto:thomas@residuum.org>> wrote:
Hi, On 03.02.2013 22:48, Stephan Elliot Perez wrote: > I am talking about PD's CPU meter. I don't have theimpression that PD > takes full advantage of 2 quad-core processors. When processing audio, > anything over 100 in PD's meter will lead to glitched audio. I am just > wondering if it will be much more when I load other videos and transition > between them.
Pd will only use one core, and one core for the GUI.There are ways to distribute the load over several cores, e.g. [pd~] or use several instances of Pd that communicate with each others:
http://www.mail-archive.com/__**pd-list@iem.at/msg33319.html<http://www.mail-archive.com/__pd-list@iem.at/msg33319.html><http://www.mail-archive.com/**pd-list@iem.at/msg33319.htmlhttp://www.mail-archive.com/pd-list@iem.at/msg33319.html >
Hth, Thomas -- "Spielen Sie Strip Schnipp-Schnapp?" (Adam Weishaupt toJohann Wolfgang von Goethe in: Robert Shea & Robert A. Wilson, The Golden Apple) http://www.residuum.org/
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