Re: Video Librarys (Was: [PD] [Newbie] Hello…)

[chris clepper]

I'm getting these threads confused since they are essentially asking
the same question.

If you absolutely have to play 9 clips on that laptop at 25 fps at the
same time, then you will need to use something other than PAL DV.  I
would suggest trying quarter frame PAL 352x288 using photo-jpeg
compression.  You will get smoother playback using the 'auto 1' 'rate
1' messages to pix_film since those use Quicktime's internal tasking
methods to get frames.

cgc

On 11/6/05, B. Bogart <ben at ekran.org> wrote:
> Hi Paul,
>
> Ok 1 projector, that makes things a little easier.
>
> 9 videos is a lot, I have never done that many on one machine. Chris
> Clepper mentioned getting 3 DV videos playing on his laptop in Gem. When
> you say DV downgraded to 33% what does this actually mean? Compression
> quality of the size of the image?
>
> I would suggest Gem as a good way of getting lots of video data onto the
> screen without fancy filters or pixel effects.
>
> for codecs I would experiment, but like I said I'm pretty DV is limited
> to video resolution (NTSC or PAL).
>
> Try 9 160x120 video clips and see how well that works.
>
> You may need to spread them clips over multiple drives (which for you
> means external firewire) to get the right disk bandwidth.
>
> jpeg-codec is a good start since it sounds like you are interested in
> some frame accuracy...
>
> Good luck.
>
> b.
>
> Paul Sellis wrote:
> > Thank you for your answers Ben and Mathieu.
> >
> >
> > *** 4 nov. 05 at 14:44, B. Bogart wrote :
> >
> >> How many projectors?
> >
> > for this project only 1.
> > But I'd like to learn a software which can synchronize more (lets say  3
> > or 4…).
> >
> >> DV codec (I think) is only ever 720x480 NTSC, can't be downgraded, you
> >> would need to encode in a different format to get a different size.
> >> So what codec, what size?
> >
> > It's a DV Pal (so 720x576) downgraded at 33%. I did it (and the hole
> > sequence…) in Flash and ActionScript with the new Flash video codec.
> > The animation works fine. The only problem is that I am obliged to  use
> > external video (not embeded) so with Flash I must  use FLV. And  the
> > quality seems not to be sufficient  for video projections.
> > In this case, I don't know if it's possible to do each of these 9
> > movies with no compression (I don't think so with my laptop…). Which
> > codec would you recommand to me ?
> >
> >> Interactive video or just video playback?
> >
> > In this case it would be just video playback
> >
> >> What HW are you planning to use?
> >
> > My Apple G4 PowerBook 1,25GHz (???…)
> >
> >> I would not suggest jitter for such a project as far as I imagine
> >> putting straight video up... softVNS would be be my second suggestion
> >> after pd/Gem Linux/OSX.
> >
> > I don't know "soft VNS"…
> > Is there a kind of "reference chart" where abilities and weakness of
> > each solution is displayed.
> > it seems to be a kind of maze for me now…
> > :-((
> >
> >> Performance or installation?
> >
> > In this case an installation.
> > But I have opportunities to work for performances…
> > I'd like to learn a soft (Max/MSP, PD,…) which could be great for all
> > this…
> > (doesn't seems to be the case…)
> >
> >> How long will it run?
> >
> > Up to 9 minutes. Looping.
> > Each movie begins at a random point between the begining and the end  of
> > its duration.
> > It will be placed in a place choosen between 9 possible places (next
> > between the 8 remaining places, and so on…).
> > Everyboby plays until the end and wait x seconds after the last movie
> > has finished. Then the whole thing loops.
> >
> >> Video playback or seeking?
> >
> > Video playback not streaming (was it what you were talking about ?)
> >
> >
> > I'm quite lost with the possibilities of Max/MSP, PD (or soft VNS…).
> > I don't even know if that's possible to do that kind of things.
> > I only know that it works fine in Flash with Actionscript…
> >
> >
> > *** 4 nov. 05 at 18:52, Mathieu Bouchard wrote :
> >
> >> If you are going to do any effects on those videos in realtime you
> >> should
> >> say what you want to do because Gem differs very much from Jitter.
> >
> > No effects in realtime on these videos. Only playback…
> >
> >
> > Your advises are more than welcome.
> > ;-))
> >
> >
> > PAul
> >
> >
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