[PD] file format for GEM
Stephan Elliot Perez
dreamoftheshoreofanotherworld at gmail.com
Sat Mar 2 19:08:40 CET 2013
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 at gmail.com> wrote:
> I had no problem playing 4 or more AIC 1080 at 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 at 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 at 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 at gmail.com>
>>> *An:* "Cyrille Henry" <ch at chnry.net>
>>> *Cc:* pd-list at 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 at 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 at 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 at chnry.net<mailto:
>>>>>> ch at 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 image
>>>>>> manipulations.
>>>>>>
>>>>>> pix_add come from the 20th century and should now be avoid since
>>>>>> it use cpu not gpu ;-)
>>>>>>
>>>>>> in order to make a fade transition between 2 videos, you can use
>>>>>> transparency 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 to
>>>>>> be 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 at residuum.org <mailto:thomas at residuum.org> <mailto:
>>>>>> thomas at residuum.org <mailto:thomas at 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 the
>>>>>> impression 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.html<http://www.mail-archive.com/pd-list@iem.at/msg33319.html>
>>>>>> >
>>>>>>
>>>>>>
>>>>>> Hth,
>>>>>> Thomas
>>>>>> --
>>>>>> "Spielen Sie Strip Schnipp-Schnapp?" (Adam Weishaupt to
>>>>>> Johann
>>>>>> Wolfgang von Goethe in: Robert Shea & Robert A. Wilson,
>>>>>> The Golden
>>>>>> Apple)
>>>>>> http://www.residuum.org/
>>>>>>
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>>>>>>
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